2011-2012 Microchip Technology Inc. DS39995C-page 1
PIC24FV32KA304 FAMILY
Power Management Modes:
• Run – CPU, Flash, SRAM and Peripherals On
• Doze – CPU Clock Runs Slower than Peripherals
• Idle – CPU Off, Flash, SRAM and Peripherals On
• Sleep – CPU, Flash and Peripherals Off and SRAM on
• Deep Sleep – CPU, Flash, SRAM and Most Peripherals
Off; Multiple Autonomous Wake-up Sources
• Low-Power Consumption:
- Run mode currents down to 8 μA, typical
- Idle mode currents down to 2.2 μA, typical
- Deep Sleep mode currents down to 20 nA, typical
- Real-Time Clock/Calendar currents down to
700 nA, 32 kHz, 1.8V
-
Watchdog Timer 500 nA, 1.8V typical
High-Performance CPU:
• Modified Harvard Architecture
• Up to 16 MIPS Operation @ 32 MHz
• 8 MHz Internal Oscillator with 4x PLL Option and
Multiple Divide Options
• 17-Bit by 17-Bit Single-Cycle Hardware Multiplier
• 32-Bit by 16-Bit Hardware Divider, 16-Bit x 16-Bit
Working Register Array
• C Compiler Optimized Instruction Set Architecture
Peripheral Feat ures:
• Hardware Real-Time Clock and Calendar (RTCC):
- Provides clock, calendar and alarm functions
- Can run in Deep Sleep mode
- Can use 50/60 Hz power line input as clock source
• Programmable 32-bit Cyclic Redundancy Check
(CRC)
• Multiple Serial Communication modules:
- Two 3-/4-wire SPI modules
-Two I
2C™ modules with multi-master/slave support
- Two UART modules supporting RS-485, RS-232,
LIN/J2602, IrDA®
• Five 16-Bit Timers/Counters with Programmable
Prescaler:
- Can be paired as 32-bit timers/counters
• Three 16-Bit Capture Inputs with Dedicated Timers
• Three 16-Bit Compare/PWM Output with Dedicated
Timers
• Configurable Open-Drain Outputs on Digital I/O Pins
• Up to Three External Interrupt Sources
Analog Features:
• 12-Bit, Up to 16-Channel Analog-to-Digital Converter:
- 100 ksps conversion rate
- Conversion available during Sleep and Idle
- Auto-sampling timer-based option for Sleep and
Idle modes
- Wake on auto-compare option
• Dual Rail-to-Rail Analog Comparators with
Programmable Input/Output Configuration
• On-Chip Voltage Reference
• Internal Temperature Sensor
• Charge Time Measurement Unit (CTMU):
- Used for capacitance sensing, 16 channels
- Time measurement, down to 200 ps resolution
-
Delay/pulse generation, down to 1 ns resolution
S pecial Microcontroller Featu res:
• Wide Operating Voltage Range:
- 1.8V to 3.6V (PIC24F devices)
- 2.0V to 5.5V (PIC24FV devices)
• Low Power Wake-up Sources and Supervisors:
- Ultra-Low Power Wake-up (ULPWU) for
Sleep/Deep Sleep
- Low-Power Watchdog Timer (DSWDT) for
Deep Sleep
- Extreme Low-Power Brown-out Reset (DSBOR)
for Deep Sleep, LPBOR for all other modes
• System Frequency Range Declaration bits:
- Declaring the frequency range optimizes the
current consumption.
• Standard Watchdog Timer (WDT) with On-Chip,
Low-Power RC Oscillator for Reliable Operation
• Programmable High/Low-Voltage Detect (HLVD)
• Standard Brown-out Reset (BOR) with 3 Programmable
Trip Points that can be Disabled in Sleep
•
High-Current Sink/Source (18 mA/18 mA) on All I/O Pins
• Flash Program Memory:
- Erase/write cycles: 10,000 minimum
- 40 years’ data retention minimum
• Data EEPROM:
- Erase/write cycles: 100,000 minimum
- 40 years’ data retention minimum
• Fail-Safe Clock Monitor (FSCM)
• Programmable Reference Clock Output
• Self-Programmable under Software Control
• In-Circuit Serial Programming™ (ICSP™) and
In-Circuit Debug (ICD) via 2 Pins
20/28/44/48-Pin, General Purpose, 16-Bit Flash
Microcontrollers with XLP Technology
PIC24FV32KA304 FAMILY
DS39995C-page 2 2011-2012 Microchip Technology Inc.
PIC24F
Device
Pins
Memory
Timers
16-Bit
Capture
Input
Compare/PWM
Output
UART w/
IrDA®
SPI
I2C™
12-Bit A/D (ch)
Comparators
CTMU (ch)
RTCC
Flash
Program
(bytes)
SRAM
(bytes)
EE Data
(bytes)
PIC24FV16KA301/
PIC24F16KA301
2016K2K51253322212312Y
PIC24FV32KA301/
PIC24F32KA301
2032K2K51253322212312Y
PIC24FV16KA302/
PIC24F16KA302
2816K2K51253322213313Y
PIC24FV32KA302/
PIC24F32KA302
2832K2K51253322213313Y
PIC24FV16KA304/
PIC24F16KA304
4416K2K51253322216316Y
PIC24FV32KA304/
PIC24F32KA304
4432K2K51253322216316Y
2011-2012 Microchip Technology Inc. DS39995C-page 3
PIC24FV32KA304 FAMILY
Pin Diagrams
Legend: Pin numbers in bold indicate pin function differences between PIC24FV and PIC24F devices.
Note 1: PIC24F32KA304 device pins have a maximum voltage of 3.6V and are not 5V tolerant.
20-Pin SPDIP/SSOP/SOIC(1)
24FVXXKA301
MCLR/RA5
RA3
RA0
RA1
VDD
VSS
RB0
RB7
RA4
RB4 RB8
RA2
RB2
RB1
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
RB15
RB14
RB13
RB12
RB9
RA6 or VCAP
Pin Pin Features
PIC24FVXXKA301 PIC24FXXKA301
1MCLR
/VPP/RA5 MCLR/VPP/RA5
2 PGEC2/VREF+/CVREF+/AN0/C3INC/SCK2/CN2/RA0 PGEC2/VREF+/CVREF+/AN0/C3INC/SCK2/CN2/RA0
3 PGED2/CVREF-/VREF-/AN1/SDO2/CN3/RA1 PGED2/CVREF-/VREF-/AN1/SDO2/CN3/RA1
4 PGED1/AN2/ULPWU/CTCMP/C1IND/C2INB/C3IND/U2TX/SDI2/
OC2/CN4/RB0
PGED1/AN2/ULPWU/CTCMP/C1IND/C2INB/C3IND/U2TX/SDI2/
OC2/CN4/RB0
5 PGEC1/AN3/C1INC/C2INA/U2RX/OC3/CTED12/CN5/RB1 PGEC1/AN3/C1INC/C2INA/U2RX/OC3/CTED12/CN5/RB1
6 AN4/SDA2/T5CK/T4CK/U1RX/CTED13/CN6/RB2 AN4/SDA2/T5CK/T4CK/U1RX/CTED13/CN6/RB2
7 OSCI/AN13/C1INB/C2IND/CLKI/CN30/RA2 OSCI/AN13/C1INB/C2IND/CLKI/CN30/RA2
8 OSCO/AN14/C1INA/C2INC/CLKO/CN29/RA3 OSCO/AN14/C1INA/C2INC/CLKO/CN29/RA3
9 PGED3/SOSCI/AN15/U2RTS/CN1/RB4 PGED3/SOSCI/AN15/U2RTS/CN1/RB4
10 PGEC3/SOSCO/SCLKI/U2CTS/CN0/RA4 PGEC3/SOSCO/SCLKI/U2CTS/CN0/RA4
11 U1TX/C2OUT/OC1/IC1/CTED1/INT0/CN23/RB7 U1TX/INT0/CN23/RB7
12 SCL1/U1CTS/C3OUT/CTED10/CN22/RB8 SCL1/U1CTS/C3OUT/CTED10/CN22/RB8
13 SDA1/T1CK/U1RTS/IC2/CTED4/CN21/RB9 SDA1/T1CK/U1RTS/IC2/CTED4/CN21/RB9
14 VCAP C2OUT/OC1/IC1/CTED1/INT2/CN8/RA6
15 AN12/HLVDIN/SCK1/SS2/IC3/CTED2/INT2/CN14/RB12 AN12/HLVDIN/SCK1/SS2/IC3/CTED2/CN14/RB12
16 AN11/SDO1/OCFB/CTPLS/CN13/RB13 AN11/SDO1/OCFB/CTPLS/CN13/RB13
17 CVREF/AN10/C3INB/RTCC/SDI1/C1OUT/OCFA/CTED5/INT1/
CN12/RB14
CVREF/AN10/C3INB/RTCC/SDI1/C1OUT/OCFA/CTED5/INT1/
CN12/RB14
18 AN9/C3INA/SCL2/T3CK/T2CK/REFO/SS1/CTED6/CN11/RB15 AN9/C3INA/SCL2/T3CK/T2CK/REFO/SS1/CTED6/CN11/RB15
19 VSS/AVSS VSS/AVSS
20 VDD/AVDD VDD/AVDD
24FXXKA301
PIC24FV32KA304 FAMILY
DS39995C-page 4 2011-2012 Microchip Technology Inc.
Pin Diagrams
28-Pin SPDIP/SSOP/SOIC(1,2)
PIC24FVXXKA302
MCLR/RA5
VSS
VDD
RA0
RA1
VDD
VSS
RB0
RB6
RA4
RB4
RA7
RA3
RA2 RA6 or VCAP
RB7
RB9
RB8
RB3
RB2
RB1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RB15
RB14
RB13
RB12
RB10
RB11
RB5
Pin Pin Features
PIC24FVXXKA302 PIC24FXXKA302
1MCLR
/VPP/RA5 MCLR/VPP/RA5
2V
REF+/CVREF+/AN0/C3INC/CTED1/CN2/RA0 VREF+/CVREF+/AN0/C3INC/CTED1/CN2/RA0
3CV
REF-/VREF-/AN1/CN3/RA1 CVREF-/VREF-/AN1/CN3/RA1
4 PGED1/AN2/ULPWU/CTCMP/C1IND/C2INB/C3IND/U2TX/CN4/RB0
PGED1/AN2/ULPWU/CTCMP/C1IND/C2INB/C3IND/U2TX/CN4/RB0
5 PGEC1/AN3/C1INC/C2INA/U2RX/CTED12/CN5/RB1 PGEC1/AN3/C1INC/C2INA/U2RX/CN5/RB1
6 AN4/C1INB/C2IND/SDA2/T5CK/T4CK/U1RX/CTED13/CN6/RB2 AN4/C1INB/C2IND/SDA2/T5CK/T4CK/U1RX/CTED13/CN6/RB2
7 AN5/C1INA/C2INC/SCL2/CN7/RB3 AN5/C1INA/C2INC/SCL2/CN7/RB3
8V
SS VSS
9 OSCI/AN13/CLKI/CN30/RA2 OSCI/AN13/CLKI/CN30/RA2
10 OSCO/AN14/CLKO/CN29/RA3 OSCO/AN14/CLKO/CN29/RA3
11 SOSCI/AN15/U2RTS/CN1/RB4 SOSCI/AN15/U2RTS/CN1/RB4
12 SOSCO/SCLKI/U2CTS/CN0/RA4 SOSCO/SCLKI/U2CTS/CN0/RA4
13 VDD VDD
14 PGED3/ASDA(1)/SCK2/CN27/RB5 PGED3/ASDA(1)/SCK2/CN27/RB5
15 PGEC3/ASCL(1)/SDO2/CN24/RB6 PGEC3/ASCL(1)/SDO2/CN24/RB6
16 U1TX/C2OUT/OC1/INT0/CN23/RB7 U1TX/INT0/CN23/RB7
17 SCL1/U1CTS/C3OUT/CTED10/CN22/RB8 SCL1/U1CTS/C3OUT/CTED10/CN22/RB8
18 SDA1/T1CK/U1RTS/IC2/CTED4/CN21/RB9 SDA1/T1CK/U1RTS/IC2/CTED4/CN21/RB9
19 SDI2/IC1/CTED3/CN9/RA7 SDI2/IC1/CTED3/CN9/RA7
20 VCAP C2OUT/OC1/CTED1/INT2/CN8/RA6
21 PGED2/SDI1/OC3/CTED11/CN16/RB10 PGED2/SDI1/OC3/CTED11/CN16/RB10
22 PGEC2/SCK1/OC2/CTED9/CN15/RB11 PGEC2/SCK1/OC2/CTED9/CN15/RB11
23 AN12/HLVDIN/SS2/IC3/CTED2/INT2/CN14/RB12 AN12/HLVDIN/SS2/IC3/CTED2/CN14/RB12
24 AN11/SDO1/OCFB/CTPLS/CN13/RB13 AN11/SDO1/OCFB/CTPLS/CN13/RB13
25 CVREF/AN10/C3INB/RTCC/C1OUT/OCFA/CTED5/INT1/CN12/RB14 CVREF/AN10/C3INB/RTCC/C1OUT/OCFA/CTED5/INT1/CN12/
RB14
26 AN9/C3INA/T3CK/T2CK/REFO/SS1/CTED6/CN11/RB15 AN9/C3INA/T3CK/T2CK/REFO/SS1/CTED6/CN11/RB15
27 VSS/AVSS VSS/AVSS
28 VDD/AVDD VDD/AVDD
PIC24FXXKA302
Legend: Pin numbers in bold indicate pin function differences between PIC24FV and PIC24F devices.
Note 1: Alternative multiplexing for SDA1 (ASDA1) and SCL1 (ASCL1) when the I2CSEL Configuration bit is set.
2: PIC24F32KA304 device pins have a maximum voltage of 3.6V and are not 5V toleran.t
2011-2012 Microchip Technology Inc. DS39995C-page 5
PIC24FV32KA304 FAMILY
Pin Diagrams
Legend: Pin numbers in bold indicate pin function differences between PIC24FV and PIC24F devices.
Note 1: Exposed pad on underside of device is connected to VSS.
2: Alternative multiplexing for SDA1 (ASDA1) and SCL1 (ASCL1) when the I2CSEL Configuration bit is set.
3: PIC24F32KA304 device pins have a maximum voltage of 3.6V and are not 5V tolerant.
28-Pin QFN(1,2,3)
10 11
2
3
6
1
18
19
20
21
22
12 1314 15
8
7
16
17
232425262728
9
PIC24FVXXKA302
5
4
MCLR/RA5
VSS
VDD
RA0
RA1
VDD
VSS
RB0
RB6
RA4
RB4
RA7
RA3
RA2
RA6 or VCAP
RB7
RB9
RB8
RB3
RB2
RB1
RB15
RB14
RB13
RB12
RB10
RB11
RB5
Pin Pin Features
PIC24FVXXKA302 PIC24FXXKA302
1
PGED1/AN2/ULPWU/CTCMP/C1IND/C2INB/C3IND/U2TX/CN4/RB0
PGED1/AN2/ULPWU/CTCMP/C1IND/C2INB/C3IND/U2TX/CN4/RB0
2 PGEC1/AN3/C1INC/C2INA/U2RX/CTED12/CN5/RB1 PGEC1/AN3/C1INC/C2INA/U2RX/CTED12/CN5/RB1
3 AN4/C1INB/C2IND/SDA2/T5CK/T4CK/U1RX/CTED13/CN6/RB2 AN4/C1INB/C2IND/SDA2/T5CK/T4CK/U1RX/CTED13/CN6/RB2
4 AN5/C1INA/C2INC/SCL2/CN7/RB3 AN5/C1INA/C2INC/SCL2/CN7/RB3
5V
SS VSS
6 OSCI/AN13/CLKI/CN30/RA2 OSCI/AN13/CLKI/CN30/RA2
7 OSCO/AN14/CLKO/CN29/RA3 OSCO/AN14/CLKO/CN29/RA3
8 SOSCI/AN15/U2RTS/CN1/RB4 SOSCI/AN15/U2RTS/CN1/RB4
9 SOSCO/SCLKI/U2CTS/CN0/RA4 SOSCO/SCLKI/U2CTS/CN0/RA4
10 VDD VDD
11 PGED3/ASDA1(2)/SCK2/CN27/RB5 PGED3/ASDA1(2)/SCK2/CN27/RB5
12 PGEC3/ASCL1(2)/SDO2/CN24/RB6 PGEC3/ASCL1(2)/SDO2/CN24/RB6
13 U1TX/C2OUT/OC1/INT0/CN23/RB7 U1TX/INT0/CN23/RB7
14 SCL1/U1CTS/C3OUT/CTED10/CN22/RB8 SCL1/U1CTS/C3OUT/CTED10/CN22/RB8
15 SDA1/T1CK/U1RTS/IC2/CTED4/CN21/RB9 SDA1/T1CK/U1RTS/IC2/CTED4/CN21/RB9
16 SDI2/IC1/CTED3/CN9/RA7 SDI2/IC1/CTED3/CN9/RA7
17 VCAP C2OUT/OC1/CTED1/INT2/CN8/RA6
18 PGED2/SDI1/OC3/CTED11/CN16/RB10 PGED2/SDI1/OC3/CTED11/CN16/RB10
19 PGEC2/SCK1/OC2/CTED9/CN15/RB11 PGEC2/SCK1/OC2/CTED9/CN15/RB11
20 AN12/HLVDIN/SS2/IC3/CTED2/INT2/CN14/RB12 AN12/HLVDIN/SS2/IC3/CTED2/CN14/RB12
21 AN11/SDO1/OCFB/CTPLS/CN13/RB13 AN11/SDO1/OCFB/CTPLS/CN13/RB13
22 CVREF/AN10/C3INB/RTCC/C1OUT/OCFA/CTED5/INT1/CN12/
RB14
CVREF/AN10/C3INB/RTCC/C1OUT/OCFA/CTED5/INT1/CN12/
RB14
23 AN9/C3INA/T3CK/T2CK/REFO/SS1/CTED6/CN11/RB15 AN9/C3INA/T3CK/T2CK/REFO/SS1/CTED6/CN11/RB15
24 VSS/AVSS VSS/AVSS
25 VDD/AVDD VDD/AVDD
26 MCLR/VPP/RA5 MCLR/VPP/RA5
27 VREF+/CVREF+/AN0/C3INC/CTED1/CN2/RA0 VREF+/CVREF+/AN0/C3INC/CN2/RA0
28 CVREF-/VREF-/AN1/CN3/RA1 CVREF-/VREF-/AN1/CN3/RA1
PIC24FXXKA302
PIC24FV32KA304 FAMILY
DS39995C-page 6 2011-2012 Microchip Technology Inc.
Pin Diagrams
Legend: Pin numbers in bold indicate pin
function differences between
PIC24FV and PIC24F devices.
Note 1: Exposed pad on underside of device
is connected to VSS.
2: Alternative multiplexing for SDA1
(ASDA1) and SCL1 (ASCL1) when
the I2CSEL Configuration bit is set.
3: PIC24F32KA304 device pins have a
maximum voltage of 3.6V and are not
5V tolerant.
Pin Pin Features
PIC24FVXXKA304 PIC24FXXKA304
1 SDA1/T1CK/U1RTS/CTED4/CN21/
RB9
SDA1/T1CK/U1RTS/CTED4/CN21/
RB9
2 U1RX/CN18/RC6 U1RX/CN18/RC6
3 U1TX/CN17/RC7 U1TX/CN17/RC7
4 OC2/CN20/RC8 OC2/CN20/RC8
5 IC2/CTED7/CN19/RC9 IC2/CTED7/CN19/RC9
6 IC1/CTED3/CN9/RA7 IC1/CTED3/CN9/RA7
7V
CAP C2OUT/OC1/CTED1/INT2/CN8/RA6
8 PGED2/SDI1/CTED11/CN16/RB10 PGED2/SDI1/CTED11/CN16/RB10
9 PGEC2/SCK1/CTED9/CN15/RB11 PGEC2/SCK1/CTED9/CN15/RB11
10 AN12/HLVDIN/CTED2/INT2/CN14/
RB12 AN12/HLVDIN/CTED2/CN14/RB12
11 AN11/SDO1/CTPLS/CN13/RB13 AN11/SDO1/CTPLS/CN13/RB13
12 OC3/CN35/RA10 OC3/CN35/RA10
13 IC3/CTED8/CN36/RA11 IC3/CTED8/CN36/RA11
14 CVREF/AN10/C3INB/RTCC/
C1OUT/OCFA/CTED5/INT1/CN12/
RB14
CVREF/AN10/C3INB/RTCC/
C1OUT/OCFA/CTED5/INT1/CN12/
RB14
15 AN9/C3INA/T3CK/T2CK/REFO/
SS1/CTED6/CN11/RB15
AN9/C3INA/T3CK/T2CK/REFO/
SS1/CTED6/CN11/RB15
16 VSS/AVSS VSS/AVSS
17 VDD/AVDD VDD/AVDD
18 MCLR/VPP/RA5 MCLR/VPP/RA5
19 VREF+/CVREF+/AN0/C3INC/
CTED1/CN2/RA0
VREF+/CVREF+/AN0/C3INC/CN2/
RA0
20 CVREF-/VREF-/AN1/CN3/RA1 CVREF-/VREF-/AN1/CN3/RA1
21
PGED1/AN2/ULPWU/CTCMP/
C1IND/C2INB/C3IND/U2TX/CN4/RB0
PGED1/AN2/ULPWU/CTCMP/C1IND/
C2INB/C3IND/U2TX/CN4/RB0
22 PGEC1/AN3/C1INC/C2INA/U2RX/
CTED12/CN5/RB1
PGEC1/AN3/C1INC/C2INA/U2RX/
CTED12/CN5/RB1
23 AN4/C1INB/C2IND/SDA2/T5CK/
T4CK/CTED13/CN6/RB2
AN4/C1INB/C2IND/SDA2/T5CK/
T4CK/CTED13/CN6/RB2
24 AN5/C1INA/C2INC/SCL2/CN7/
RB3
AN5/C1INA/C2INC/SCL2/CN7/RB3
25 AN6/CN32/RC0 AN6/CN32/RC0
26 AN7/CN31/RC1 AN7/CN31/RC1
27 AN8/CN10/RC2 AN8/CN10/RC2
28 VDD VDD
29 VSS VSS
30 OSCI/AN13/CLKI/CN30/RA2 OSCI/AN13/CLKI/CN30/RA2
31 OSCO/AN14/CLKO/CN29/RA3 OSCO/AN14/CLKO/CN29/RA3
32 OCFB/CN33/RA8 OCFB/CN33/RA8
33 SOSCI/AN15/U2RTS/CN1/RB4 SOSCI/AN15/U2RTS/CN1/RB4
34 SOSCO/SCLKI/U2CTS/CN0/RA4 SOSCO/SCLKI/U2CTS/CN0/RA4
35 SS2/CN34/RA9 SS2/CN34/RA9
36 SDI2/CN28/RC3 SDI2/CN28/RC3
37 SDO2/CN25/RC4 SDO2/CN25/RC4
38 SCK2/CN26/RC5 SCK2/CN26/RC5
39 VSS VSS
40 VDD VDD
41 PGED3/ASDA1(2)/CN27/RB5 PGED3/ASDA1(2)/CN27/RB5
42 PGEC3/ASCL1(2)/CN24/RB6 PGEC3/ASCL1(2)/CN24/RB6
43 C2OUT/OC1/INT0/CN23/RB7 INT0/CN23/RB7
44 SCL1/U1CTS/C3OUT/CTED10/
CN22/RB8
SCL1/U1CTS/C3OUT/CTED10/
CN22/RB8
10
11
2
3
4
5
6
1
18
19
20
21
22
12
13
14
15
38
8
7
44
43
42
41
40
39
16
17
29
30
31
32
33
23
24
25
26
27
28
36
34
35
9
PIC24FVXXKA304
37
RB8
RB7
RB6
RB5
VDD
VSS
RC5
RC4
RC3
RA9
RA4
RB4
RA8
RA3
RA2
VSS
VDD
RC2
RC1
RC0
RB3
RB2
RB9
RC6
RC7
RC8
RC9
RA7
RA6 or VCAP
RB10
RB11
RB12
RB13
RB1
RB0
RA1
RA0
MCLR/RA5
VDD
VSS
RB15
RB14
RA11
RA10
44-Pin TQFP/QFN(1,2,3)
PIC24FXXKA304
2011-2012 Microchip Technology Inc. DS39995C-page 7
PIC24FV32KA304 FAMILY
Pin Diagrams
Pin Pin Features
PIC24FVXXKA304 PIC24FXXKA304
1
SDA1/T1CK/U1RTS/CTED4/CN21/RB9 SDA1/T1CK/U1RTS/CTED4/CN21/
RB9
2
U1RX/CN18/RC6 U1RX/CN18/RC6
3
U1TX/CN17/RC7 U1TX/CN17/RC7
4
OC2/CN20/RC8 OC2/CN20/RC8
5
IC2/CTED7/CN19/RC9 IC2/CTED7/CN19/RC9
6
IC1/CTED3/CN9/RA7 IC1/CTED3/CN9/RA7
7VCAP C20UT/OC1/CTED1/INT2CN8/RA6
8N/C N/C
9
PGED2/SDI1/CTED11/CN16/RB10 PGED2/SDI1/CTED11/CN16/RB10
10
PGEC2/SCK1/CTED9/CN15/RB11 PGEC2/SCK1/CTED9/CN15/RB11
11
AN12/HLVDIN/CTED2/
INT2/
CN14/RB12 AN12/HLVDIN/CTED2/CN14/RB12
12
AN11/SDO1/CTPLS/CN13/RB13 AN11/SDO1/CTPLS/CN13/RB13
13
OC3/CN35/RA10 OC3/CN35/RA10
14
IC3/CTED8/CN36/RA11 IC3/CTED8/CN36/RA11
15
CV
REF
/AN10/C3INB/RTCC/
C1OUT/OCFA/CTED5/
INT1/
CN12/RB14
CV
REF
/AN10/C3INB/RTCC/C1OUT/
OCFA/CTED5/
INT1/
CN12/RB14
16
AN9/C3INA/T3CK/T2CK/REFO/
SS1/CTED6/CN11/RB15
AN9/C3INA/T3CK/T2CK/REFO/
SS1/CTED6/CN11/RB15
17 VSS/AVSS VSS/AVSS
18 VDD/AVDD VDD/AVDD
19 MCLR/RA5 MCLR/RA5
20 N/C N/C
21
V
REF
+/CV
REF
+/AN0/C3INC/
CTED1/CN2/RA0
V
REF
+/CV
REF
+/AN0/C3INC/CN2/
RA0
22
CV
REF
-/V
REF
-/AN1/CN3/RA1 CV
REF
-/V
REF
-/AN1/CN3/RA1
23
PGED1/AN2/ULPWU/CTCMP/C1IND/
C2INB/C3IND/U2TX/CN4/RB0
PGED1/AN2/ULPWU/CTCMP/C1IND/
C2INB/C3IND/U2TX/CN4/RB0
24
PGEC1/AN3/C1INC/C2INA/U2RX/
CTED12/CN5/RB1
PGEC1/AN3/C1INC/C2INA/U2RX/
CTED12/CN5/RB1
25
AN4/C1INB/C2IND/SDA2/T5CK/
T4CK/CTED13/CN6/RB2
AN4/C1INB/C2IND/SDA2/T5CK/
T4CK/CTED13/CN6/RB2
26
AN5/C1INA/C2INC/SCL2/CN7/RB3 AN5/C1INA/C2INC/SCL2/CN7/RB3
27
AN6/CN32/RC0 AN6/CN32/RC0
28
AN7/CN31/RC1 AN7/CN31/RC1
29
AN8/CN10/RC2 AN8/CN10/RC2
30 VDD VDD
31 VSS VSS
32 N/C N/C
33
OSCI/AN13/CLKI/CN30/RA2 OSCI/AN13/CLKI/CN30/RA2
34
OSCO/AN14/CLKO/CN29/RA3 OSCO/AN14/CLKO/CN29/RA3
35
OCFB/CN33/RA8 OCFB/CN33/RA8
36
SOSCI/AN15/U2RTS/CN1/RB4 SOSCI/AN15/U2RTS/CN1/RB4
37
SOSCO/SCLKI/U2CTS/CN0/RA4 SOSCO/SCLKI/U2CTS/CN0/RA4
38
SS2/CN34/RA9 SS2/CN34/RA9
39
SDI2/CN28/RC3 SDI2/CN28/RC3
40
SDO2/CN25/RC4 SDO2/CN25/RC4
41
SCK2/CN26/RC5 SCK2/CN26/RC5
42 VSS VSS
43 VDD VDD
44 N/C N/C
45
PGED3/ASDA1
(2)
/CN27/RB5 PGED3/ASDA1
(2)
/CN27/RB5
46
PGEC3/ASCL1
(2)
/CN24/RB6 PGEC3/ASCL1
(2)
/CN24/RB6
47
C2OUT/OC1/
INT0/
CN23/RB7
INT0/
CN23/RB7
48
SCL1/U1CTS/C3OUT/CTED10/
CN22/RB8
SCL1/U1CTS/C3OUT/CTED10/
CN22/RB8
RB8
RB7
RB6
RB5
N/C
V
DD
V
SS
RC5
RC4
RC3
RA9
RA4
RB9 RB4
RC6 RA8
RC7 RA3
RC8 RA2
RC9 N/C
RA7 V
SS
RA6 or V
CAP
V
DD
N/C RC2
RB10 RC1
RB11 RC0
RB12 RB3
RB13 RB2
RA10
RA11
RB14
RB15
V
SS
/AV
SS
V
DD
/A
V
DD
N/C
RA0
RA1
RB0
RB1
Legend: Pin numbers in bold indicate pin func-
tion differences between PIC24FV and
PIC24F devices.
Note 1: Exposed pad on underside of device is
connected to VSS.
2: Alternative multiplexing for SDA1
(ASDA1) and SCL1 (ASCL1) when the
I2CSEL Configuration bit is set.
3: PIC24F32KA3XX device pins have a
maximum voltage of 3.6V and are not
5V tolerant.
48-Pin UQFN(1,2,3)
MCLR/RA5
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
13
14
15
16
17
18
19
20
21
22
23
24
PIC24FVXXKA304
PIC24FXXKA304
1
2
3
4
5
6
7
8
9
10
11
12
PIC24FV32KA304 FAMILY
DS39995C-page 8 2011-2012 Microchip Technology Inc.
Table of Contents
1.0 Device Overview ........................................................................................................................................................................ 11
2.0 Guidelines for Getting Started with 16-Bit Microcontrollers........................................................................................................ 23
3.0 CPU ........................................................................................................................................................................................... 29
4.0 Memory Organization ................................................................................................................................................................. 35
5.0 Flash Program Memory.............................................................................................................................................................. 57
6.0 Data EEPROM Memory ............................................................................................................................................................. 63
7.0 Resets ........................................................................................................................................................................................ 69
8.0 Interrupt Controller ..................................................................................................................................................................... 75
9.0 Oscillator Configuration ............................................................................................................................................................ 113
10.0 Power-Saving Features............................................................................................................................................................ 123
11.0 I/O Ports ................................................................................................................................................................................... 135
12.0 Timer1 ..................................................................................................................................................................................... 139
13.0 Timer2/3 and Timer4/5 ............................................................................................................................................................. 141
14.0 Input Capture with Dedicated Timers ....................................................................................................................................... 147
15.0 Output Compare with Dedicated Timers .................................................................................................................................. 151
16.0 Serial Peripheral Interface (SPI)............................................................................................................................................... 161
17.0 Inter-Integrated Circuit™ (I2C™).............................................................................................................................................. 169
18.0 Universal Asynchronous Receiver Transmitter (UART) ........................................................................................................... 177
19.0 Real-Time Clock and Calendar (RTCC) .................................................................................................................................. 185
20.0 32-Bit Programmable Cyclic Redundancy Check (CRC) Generator ........................................................................................ 199
21.0 High/Low-Voltage Detect (HLVD)............................................................................................................................................. 205
22.0 12-Bit A/D Converter with Threshold Detect ............................................................................................................................ 207
23.0 Comparator Module.................................................................................................................................................................. 225
24.0 Comparator Voltage Reference................................................................................................................................................ 229
25.0 Charge Time Measurement Unit (CTMU) ................................................................................................................................ 231
26.0 Special Features ...................................................................................................................................................................... 239
27.0 Development Support............................................................................................................................................................... 251
28.0 Instruction Set Summary .......................................................................................................................................................... 255
29.0 Electrical Characteristics .......................................................................................................................................................... 263
30.0 DC and AC Characteristics Graphs and Tables ....................................................................................................................... 295
31.0 Packaging Information.............................................................................................................................................................. 315
Appendix A: Revision History............................................................................................................................................................. 339
Index .................................................................................................................................................................................................. 341
The Microchip Web Site ..................................................................................................................................................................... 347
Customer Change Notification Service .............................................................................................................................................. 347
Customer Support .............................................................................................................................................................................. 347
Reader Response .............................................................................................................................................................................. 348
Product Identification System............................................................................................................................................................. 349
2011-2012 Microchip Technology Inc. DS39995C-page 9
PIC24FV32KA304 FAMILY
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and
enhanced as new volumes and updates are introduced.
If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
E-mail at docerrors@microchip.com or fax the Reader Response Form in the back of this data sheet to (480) 792-4150. We
welcome your feedback.
Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000A is version A of document DS30000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for current
devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the revision
of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
• Microchip’s Worldwide Web site; http://www.microchip.com
• Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include literature number) you are
using.
Customer No tific atio n Syst em
Register on our web site at www.microchip.com to receive the most current information on all of our products.
PIC24FV32KA304 FAMILY
DS39995C-page 10 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 11
PIC24FV32KA304 FAMILY
1.0 DEVICE OVERVIEW
This document contains device-specific information for
the following devices:
• PIC24FV16KA301, PIC24F16KA301
• PIC24FV16KA302, PIC24F16KA302
• PIC24FV16KA304, PIC24F16KA304
• PIC24FV32KA301, PIC24F32KA301
• PIC24FV32KA302, PIC24F32KA302
• PIC24FV32KA304, PIC24F32KA304
The PIC24FV32KA304 family introduces a new line of
extreme low-power Microchip devices. This is a 16-bit
microcontroller family with a broad peripheral feature set
and enhanced computational performance. This family
also offers a new migration option for those
high-performance applications which may be
outgrowing their 8-bit platforms, but do not require the
numerical processing power of a digital signal processor.
1.1 Core Features
1.1.1 16-BIT ARCHITECTURE
Central to all PIC24F devices is the 16-bit modified
Harvard architecture, first introduced with Microchip’s
dsPIC® digital signal controllers. The PIC24F CPU core
offers a wide range of enhancements, such as:
• 16-bit data and 24-bit address paths with the
ability to move information between data and
memory spaces
• Linear addressing of up to 12 Mbytes (program
space) and 64 Kbytes (data)
• A 16-element working register array with built-in
software stack support
• A 17 x 17 hardware multiplier with support for
integer math
• Hardware support for 32-bit by 16-bit division
• An instruction set that supports multiple
addressing modes and is optimized for high-level
languages, such as C
• Operational performance up to 16 MIPS
1.1.2 POWER-SAVING TECHNOLOGY
All of the devices in the PIC24FV32KA304 family
incorporate a range of features that can significantly
reduce power consumption during operation. Key
features include:
•On-the-Fly Clock Switching: The device clock
can be changed under software control to the
Timer1 source or the internal, low-power RC
oscillator during operation, allowing users to
incorporate power-saving ideas into their software
designs.
•Doze Mode Operation: When timing-sensitive
applications, such as serial communications,
require the uninterrupted operation of peripherals,
the CPU clock speed can be selectively reduced,
allowing incremental power savings without
missing a beat.
•Instruction-Based Power-Saving Modes: There
are three instruction-based power-saving modes:
- Idle Mode: The core is shut down while leaving
the peripherals active.
- Sleep Mode: The core and peripherals that
require the system clock are shut down, leaving
the peripherals that use their own clock, or the
clock from other devices, active.
- Deep Sleep Mode: The core, peripherals
(except RTCC and DSWDT), Flash and SRAM
are shut down.
1.1.3 OSCILLATOR OPTIONS AND
FEATURES
The PIC24FV32KA304 family offers five different
oscillator options, allowing users a range of choices in
developing application hardware. These include:
• Two Crystal modes using crystals or ceramic
resonators.
• Two External Clock modes offering the option of a
divide-by-2 clock output.
• Two Fast Internal oscillators (FRCs): One with a
nominal 8 MHz output and the other with a
nominal 500 kHz output. These outputs can also
be divided under software control to provide clock
speed as low as 31 kHz or 2 kHz.
• A Phase Locked Loop (PLL) frequency multiplier,
available to the external Oscillator modes and the
8 MHz FRC oscillator, which allows clock speeds
of up to 32 MHz.
• A separate internal RC oscillator (LPRC) with a
fixed 31 kHz output, which provides a low-power
option for timing-insensitive applications.
PIC24FV32KA304 FAMILY
DS39995C-page 12 2011-2012 Microchip Technology Inc.
The internal oscillator block also provides a stable
reference source for the Fail-Safe Clock Monitor
(FSCM). This option constantly monitors the main clock
source against a reference signal provided by the
internal oscillator and enables the controller to switch to
the internal oscillator, allowing for continued low-speed
operation or a safe application shutdown.
1.1.4 EASY MIGRATION
Regardless of the memory size, all the devices share
the same rich set of peripherals, allowing for a smooth
migration path as applications grow and evolve.
The consistent pinout scheme used throughout the
entire family also helps in migrating to the next larger
device. This is true when moving between devices with
the same pin count, or even jumping from 20-pin or
28-pin devices to 44-pin/48-pin devices.
The PIC24F family is pin compatible with devices in the
dsPIC33 family, and shares some compatibility with the
pinout schema for PIC18 and dsPIC30. This extends
the ability of applications to grow from the relatively
simple, to the powerful and complex.
1.2 Other Special Features
•Communications: The PIC24FV32KA304 family
incorporates a range of serial communication
peripherals to handle a range of application
requirements. There is an I2C™ module that
supports both the Master and Slave modes of
operation. It also comprises UARTs with built-in
IrDA® encoders/decoders and an SPI module.
•Real-Time Clock/Calendar: This module
implements a full-featured clock and calendar with
alarm functions in hardware, freeing up timer
resources and program memory space for use of
the core application.
•12-Bit A/D Converter: This module incorporates
programmable acquisition time, allowing for a
channel to be selected and a conversion to be
initiated without waiting for a sampling period, and
faster sampling speed. The 16-deep result buffer
can be used either in Sleep to reduce power, or in
Active mode to improve throughput.
•Charge Time Measurement Unit (CTMU)
Interface: The PIC24FV32KA304 family includes
the new CTMU interface module, which can be
used for capacitive touch sensing, proximity
sensing, and also for precision time measurement
and pulse generation.
1.3 Details on Indi vidual Family
Members
Devices in the PIC24FV32KA304 family are available
in 20-pin, 28-pin, 44-pin and 48-pin packages. The
general block diagram for all devices is shown in
Figure 1-1.
The devices are different from each other in four ways:
1. Flash program memory (16 Kbytes for
PIC24FV16KA devices, 32 Kbytes for
PIC24FV32KA devices).
2. Available I/O pins and ports (18 pins on two
ports for 20-pin devices, 22 pins on two ports for
28-pin devices and 38 pins on three ports for
44/48-pin devices).
3. Alternate SCLx and SDAx pins are available
only in 28-pin, 44-pin and 48-pin devices and not
in 20-pin devices.
4. Members of the PIC24FV32KA301 family are
available as both standard and high-voltage
devices. High-voltage devices, designated with
an “FV” in the part number (such as
PIC24FV32KA304), accommodate an operating
VDD range of 2.0V to 5.5V, and have an
on-board voltage regulator that powers the core.
Peripherals operate at VDD. Standard devices,
designated by “F” (such as PIC24F32KA304),
function over a lower VDD range of 1.8V to 3.6V.
These parts do not have an internal regulator,
and both the core and peripherals operate
directly from VDD.
All other features for devices in this family are identical;
these are summarized in Ta b l e 1 - 1 .
A list of the pin features available on the
PIC24FV32KA304 family devices, sorted by function,
is provided in Table 1-3.
Note: Table 1-1 provides the pin location of
individual peripheral features and not how
they are multiplexed on the same pin. This
information is provided in the pinout
diagrams on pages 3, 4, 5, 6 and 7 of the
data sheet. Multiplexed features are
sorted by the priority given to a feature,
with the highest priority peripheral being
listed first.
2011-2012 Microchip Technology Inc. DS39995C-page 13
PIC24FV32KA304 FAMILY
TABLE 1-1: DEVICE FEATURES FOR THE PIC24FV32KA304 FAMILY
Features
PIC24FV16KA301
PIC24FV32KA301
PIC24FV16KA302
PIC24FV32KA302
PIC24FV16KA304
PIC24FV32KA304
Operating Frequency DC – 32 MHz
Program Memory (bytes) 16K 32K 16K 32K 16K 32K
Program Memory (instructions) 5632 11264 5632 11264 5632 11264
Data Memory (bytes) 2048
Data EEPROM Memory (bytes) 512
Interrupt Sources (soft vectors/
NMI traps)
30 (26/4)
I/O Ports PORTA<5:0>
PORTB<15:12,9:7,4,2:0>
PORTA<7,5:0>
PORTB<15:0>
PORTA<11:7,5:0>
PORTB<15:0>
PORTC<9:0>
Total I/O Pins 17 23 38
Timers: Total Number (16-bit) 5
32-Bit (from paired 16-bit timers) 2
Input Capture Channels 3
Output Compare/PWM Channels 3
Input Change Notification Interrupt 16 22 37
Serial Communications: UART
SPI (3-wire/4-wire)
2
I2C™ 2
12-Bit Analog-to-Digital Module
(input channels)
12 13 16
Analog Comparators 3
Resets (and delays) POR, BOR, RESET Instruction, MCLR, WDT, Illegal Opcode,
REPEAT Instruction, Hardware Traps, Configuration Word Mismatch
( P W RT, O S T, P L L L o c k)
Instruction Set 76 Base Instructions, Multiple Addressing Mode Variations
Packages 20-Pin
PDIP/SSOP/SOIC
28-Pin
SPDIP/SSOP/SOIC/QFN
44-Pin QFN/TQFP
48-Pin UQFN
PIC24FV32KA304 FAMILY
DS39995C-page 14 2011-2012 Microchip Technology Inc.
TABLE 1-2: DEVICE FEATURES FOR THE PIC24F32KA304 FAMILY
Features
PIC24F16KA301
PIC24F32KA301
PIC24F16KA302
PIC24F32KA302
PIC16F16KA304
PIC24F32KA304
Operating Frequency DC – 32 MHz
Program Memory (bytes) 16K 32K 16K 32K 16K 32K
Program Memory (instructions) 5632 11264 5632 11264 5632 11264
Data Memory (bytes) 2048
Data EEPROM Memory (bytes) 512
Interrupt Sources (soft vectors/
NMI traps)
30 (26/4)
I/O Ports PORTA<6:0>,
PORTB<15:12, 9:7, 4, 2:0>
PORTA<7:0>,
PORTB<15:0>
PORTA<11:0>,
PORTB<15:0>,
PORTC<9:0>
Total I/O Pins 18 24 39
Timers: Total Number (16-bit) 5
32-Bit (from paired 16-bit timers) 2
Input Capture Channels 3
Output Compare/PWM Channels 3
Input Change Notification Interrupt 17 23 38
Serial Communications: UART
SPI (3-wire/4-wire)
2
I2C™ 2
12-Bit Analog-to-Digital Module
(input channels)
12 13 16
Analog Comparators 3
Resets (and delays) POR, BOR, RESET Instruction, MCLR, WDT, Illegal Opcode,
REPEAT Instruction, Hardware Traps, Configuration Word Mismatch
( P W RT, O S T, P L L L o c k)
Instruction Set 76 Base Instructions, Multiple Addressing Mode Variations
Packages 20-Pin
PDIP/SSOP/SOIC
28-Pin
SPDIP/SSOP/SOIC/QFN
44-Pin QFN/TQFP
48-Pin UQFN
2011-2012 Microchip Technology Inc. DS39995C-page 15
PIC24FV32KA304 FAMILY
FIGURE 1-1: PIC24FV 32KA 304 FAMILY GENERAL BLOCK DIAGRAM
Instruction
Decode and
Control
16
PCH PCL
16
Program Counter
16-Bit ALU
23
24
Data Bus
Inst Register
16
Divide
Support
Inst Latch
16
EA MUX
Read AGU
Write AGU
16
16
8
Interrupt
Controller
PSV and Table
Data Access
Control Block
Stack
Control
Logic
Repeat
Control
Logic
Data Latch
Data RAM
Address
Latch
Address Latch
Program Memory
Data Latch
16
Address Bus
Literal Data
23
Control Signals
16
16
16 x 16
W Reg Array
Multiplier
17x17
PORTA(1)
RA<0:7>
PORTB(1)
RB<0:15>
Note 1: All pins or features are not implemented on all device pinout configurations. See Table 1-3 for I/O port pin
descriptions.
Comparators
Timer4/5
Timer2/3 CTMU
IC1-3
A/D
12-Bit
PWM/ SPI1 I2C1
CN1-22(1) UART1/2
Data EEPROM
OSCI/CLKI
OSCO/CLKO
VDD, VSS
Timing
Generation
MCLR
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
BOR
FRC/LPRC
Oscillators
DSWDT
Timer1RTCC
REFO OC1-3
HLVD
PORTC(1)
RC<9:0>
Precision
Reference
Band Gap
Voltage
VCAP
Regulator
PIC24FV32KA304 FAMILY
DS39995C-page 16 2011-2012 Microchip Technology Inc.
TABLE 1-3: PIC24FV32KA304 FAMILY PINOUT DESCRIPTIONS
Function
FFV
I/O Buffer Description
Pin Number Pin Numb er
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
AN0 2 2 27 19 21 2 2 27 19 21 I ANA A/D Analog Inputs
AN1 3 32820223 3282022IANA
AN2 4 4 1 21 23 4 4 1 21 23 I ANA
AN3 5 5 2 22 24 5 5 2 22 24 I ANA
AN4 6 6 3 23 25 6 6 3 23 25 I ANA
AN5 — 7 4 24 26 — 7 4 24 26 I ANA
AN6 — — — 25 27 — — — 25 27 I ANA
AN7 — — — 26 28 — — — 26 28 I ANA
AN8 — — — 27 29 — — — 27 29 I ANA
AN9 18 26 23 15 16 18 26 23 15 16 I ANA
AN10 17 25 22 14 15 17 25 22 14 15 I ANA
AN11 16 24 21 11 12 16 24 21 11 12 I ANA
AN12 15 23 20 10 11 15 23 20 10 11 I ANA
AN13 7 9 6 30 33 7 9 6 30 33 I ANA
AN14 8107313481073134IANA
AN15 9 11 8 33 36 9 11 8 33 36 I ANA
ASCL1 — 15 12 42 46 — 15 12 42 46 I/O I2C™ Alternate I2C1 Clock Input/Output
ASDA1 — 14 11 41 45 — 14 11 41 45 I/O I2C Alternate I2C1 Data Input/Output
AVDD 20 28 25 17 18 20 28 25 17 18 I ANA A/D Supply Pins
AVSS 19 27 24 16 17 19 27 24 16 17 I ANA
C1INA 8 7 4 24 26 8 7 4 24 26 I ANA Comparator 1 Input A (+)
C1INB 7 6 3 23 25 7 6 3 23 25 I ANA Comparator 1 Input B (-)
C1INC 5 5 2 22 24 5 5 2 22 24 I ANA Comparator 1 Input C (+)
C1IND 4 4 1 21 23 4 4 1 21 23 I ANA Comparator 1 Input D (-)
C1OUT 17 25 22 14 15 17 25 22 14 15 O — Comparator 1 Output
C2INA 5 5 2 22 24 5 5 2 22 24 I ANA Comparator 2 Input A (+)
C2INB 4 4 1 21 23 4 4 1 21 23 I ANA Comparator 2 Input B (-)
C2INC 8 7 4 24 26 8 7 4 24 26 I ANA Comparator 2 Input C (+)
C2IND 7 6 3 23 25 7 6 3 23 25 I ANA Comparator 2 Input D (-)
C2OUT 14 20 17 7 7 11 16 13 43 47 O — Comparator 2 Output
2011-2012 Microchip Technology Inc. DS39995C-page 17
PIC24FV32KA304 FAMILY
C3INA 18 26 23 15 16 18 26 23 15 16 I ANA Comparator 3 Input A (+)
C3INB 17 25 22 14 15 17 25 22 14 15 I ANA Comparator 3 Input B (-)
C3INC 2 2 27 19 21 2 2 27 19 21 I ANA Comparator 3 Input C (+)
C3IND 4 4 1 21 23 4 4 1 21 23 I ANA Comparator 3 Input D (-)
C3OUT 12171444481217144448O—Comparator 3 Output
CLK I 7 9 6 30 33 7 9 6 30 33 I ANA Main Clock Input
CLKO 8107313481073134O—System Clock Output
CN0 10 12 9 34 37 10 12 9 34 37 I ST Interrupt-on-Change Inputs
CN1 9118333691183336IST
CN2 2 2 27 19 21 2 2 27 19 21 I ST
CN3 3 3 28 20 22 3 3 28 20 22 I ST
CN4 4 4 1 21 23 4 4 1 21 23 I ST
CN5 5 5 2 22 24 5 5 2 22 24 I ST
CN6 6 6 3 23 25 6 6 3 23 25 I ST
CN7 — 7 4 24 26 –- 7 4 24 26 I ST
CN8 14 20 17 7 7 –- –- –- — –- I ST
CN9 –- 19 16 6 6 –- 19 16 6 6 I ST
CN10 –- — — 27 29 –- –- –- 27 29 I ST
CN11 18 26 23 15 16 18 26 23 15 16 I ST
CN12 17 25 22 14 15 17 25 22 14 15 I ST
CN13 16 24 21 11 12 16 24 21 11 12 I ST
CN14 15 23 20 10 11 15 23 20 10 11 I ST
CN15 –- 22 19 9 10 –- 22 19 9 10 I ST
CN16 –- 21 18 8 9 –- 21 18 8 9 I ST
CN17 –- — — 3 3 –- — — 3 3 I ST
CN18 — — — 2 2 — — — 2 2 I ST
CN19 –- — — 5 5 — — –- 5 5 I ST
CN20 –- — — 4 4 — –- –- 4 4 I ST
CN21 13 18 15 1 1 13 18 15 1 1 I ST
CN22 12 17 14 44 48 12 17 14 44 48 I ST
TABLE 1-3: PIC24FV32KA304 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Function
FFV
I/O Buffer Description
Pin Number Pin Numb er
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
PIC24FV32KA304 FAMILY
DS39995C-page 18 2011-2012 Microchip Technology Inc.
CN23 11 16 13 43 47 11 16 13 43 47 I ST Interrupt-on-Change Inputs
CN24 –- 15 12 42 46 –- 15 12 42 46 I ST
CN25 –- — — 37 40 –- –- –- 37 40 I ST
CN26 –- — — 38 41 –- –- –- 38 41 I ST
CN27 –- 14 11 41 45 –- 14 11 41 45 I ST
CN28 –- — — 36 39 –- –- –- 36 39 I ST
CN29 8107313481073134IST
CN30 7 9 6 30 33 7 9 6 30 33 I ST
CN31 –- — — 26 28 — — — 26 28 I ST
CN32 –- — — 25 27 — — — 25 27 I ST
CN33 –- — — 32 35 — — — 32 35 I ST
CN34 –- — — 35 38 — — — 35 38 I ST
CN35 –- — — 12 13 — — — 12 13 I ST
CN36 –- — — 13 14 — — — 13 14 I ST
CVREF 17 25 22 14 15 17 25 22 14 15 I ANA Comparator Voltage Reference Output
CVREF+ 2 2 27 19 21 2 2 27 19 21 I ANA Comparator Reference Positive Input Voltage
CVREF- 3 3 28 20 22 3 3 28 20 22 I ANA Comparator Reference Negative Input Voltage
CTCMP 4 4 1 21 23 4 4 1 21 23 I ANA CTMU Comparator Input
CTED1 14 20 17 7 7 11 2 27 19 21 I ST CTMU Trigger Edge Inputs
CTED2 15 23 20 10 11 15 23 20 10 11 I ST
CTED3 — 19 16 6 6 — 19 16 6 6 I ST
CTED4 13 18 15 1 1 13 18 15 1 1 I ST
CTED5 17 25 22 14 15 17 25 22 14 15 I ST
CTED6 18 26 23 15 16 18 26 23 15 16 I ST
CTED7 — — — 5 5 — — — 5 5 I ST
CTED8 — — — 13 14 — — — 13 14 I ST
CTED9 —2219 9 10—2219 9 10IST
CTED10 12 17 14 44 48 12 17 14 44 48 I ST
CTED11 — 21 18 8 9 — 21 18 8 9 I ST
CTED12 5 5 2 22 24 5 5 2 22 24 I ST
CTED13 6 6 3 23 25 6 6 3 23 25 I ST
TABLE 1-3: PIC24FV32KA304 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Function
FFV
I/O Buffer Description
Pin Number Pin Numb er
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
2011-2012 Microchip Technology Inc. DS39995C-page 19
PIC24FV32KA304 FAMILY
CTPLS 16 24 21 11 12 16 24 21 11 12 O — CTMU Pulse Output
HLVDIN 15 23 20 10 11 15 23 20 10 11 I ST High/Low-Voltage Detect Input
IC1 14 19 16 6 6 11 19 16 6 6 I ST Input Capture 1 Input
IC2 13 18 15 5 5 13 18 15 5 5 I ST Input Capture 2 Input
IC3 15 23 20 13 14 15 23 20 13 14 I ST Input Capture 3 Input
INT0 11 16 13 43 47 11 16 13 43 47 I ST Interrupt 0 Input
INT1 17 25 22 14 15 17 25 22 14 15 I ST Interrupt 1 Input
INT2 14 20 17 7 7 15 23 20 10 11 I ST Interrupt 2 Input
MCLR 1 1 26 18 19 1 1 26 18 19 I ST Master Clear (Device Reset) Input (active-low)
OC1 14 20 17 7 7 11 16 13 43 47 O — Output Compare/PWM1 Output
OC2 4 22 19 4 4 4 22 19 4 4 O — Output Compare/PWM2 Output
OC3 5 21 18 12 13 5 21 18 12 13 O — Output Compare/PWM3 Output
OCFA 17 25 22 14 15 17 25 22 14 15 O — Output Compare Fault A
OFCB 16 24 21 32 35 16 24 21 32 35 O — Output Compare Fault B
OSCI 7 9 6 30 33 7 9 6 30 33 I ANA Main Oscillator Input
OSCO 8 10 7 31 34 8 10 7 31 34 O ANA Main Oscillator Output
PGEC1 5 5 2 22 24 5 5 2 22 24 I/O ST ICSP™ Clock 1
PCED1 4 4 1 21 23 4 4 1 21 23 I/O ST ICSP Data 1
PGEC2 2 22191910 2 22191910I/OSTICSP Clock 2
PGED2 3 21 18 8 9 3 21 18 8 9 I/O ST ICSP Data 2
PGEC3 10 15 12 42 46 10 15 12 42 46 I/O ST ICSP Clock 3
PGED3 9 14 11 41 45 9 14 11 41 45 I/O ST ICSP Data 3
TABLE 1-3: PIC24FV32KA304 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Function
FFV
I/O Buffer Description
Pin Number Pin Numb er
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
PIC24FV32KA304 FAMILY
DS39995C-page 20 2011-2012 Microchip Technology Inc.
RA0 2 2 27 19 21 2 2 27 19 21 I/O ST PORTA Pins
RA1 3 3 28 20 22 3 3 28 20 22 I/O ST
RA2 7 9 6 30 33 7 9 6 30 33 I/O ST
RA3 8107313481073134I/OST
RA4 1012 9 34371012 9 3437I/OST
RA5 1 1 26 18 19 1 1 26 18 19 I/O ST
RA6 14 20 17 7 7 — — — — — I/O ST
RA7 — 19 16 6 6 — 19 16 6 6 I/O ST
RA8 — — — 32 35 — — — 32 35 I/O ST
RA9 — — — 35 38 — — — 35 38 I/O ST
RA10 — — — 12 13 — — — 12 13 I/O ST
RA11 ———1314———1314I/OST
RB0 4 4 1 21 23 4 4 1 21 23 I/O ST PORTB Pins
RB1 5 5 2 22 24 5 5 2 22 24 I/O ST
RB2 6 6 3 23 25 6 6 3 23 25 I/O ST
RB3 — 7 4 24 26 — 7 4 24 26 I/O ST
RB4 9118333691183336I/OST
RB5 —14114145—14114145I/OST
RB6 — 15 12 42 46 — 15 12 42 46 I/O ST
RB7 11 16 13 43 47 11 16 13 43 47 I/O ST
RB8 12 17 14 44 48 12 17 14 44 48 I/O ST
RB9 13 18 15 1 1 13 18 15 1 1 I/O ST
RB10 — 21 18 8 9 — 21 18 8 9 I/O ST
RB11 —2219 9 10—2219 9 10I/OST
RB12 15 23 20 10 11 15 23 20 10 11 I/O ST
RB13 16 24 21 11 12 16 24 21 11 12 I/O ST
RB14 17 25 22 14 15 17 25 22 14 15 I/O ST
RB15 18 26 23 15 16 18 26 23 15 16 I/O ST
TABLE 1-3: PIC24FV32KA304 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Function
FFV
I/O Buffer Description
Pin Number Pin Numb er
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
2011-2012 Microchip Technology Inc. DS39995C-page 21
PIC24FV32KA304 FAMILY
RC0 — — — 25 27 — — — 25 27 I/O ST PORTC Pins
RC1 — — — 26 28 — — — 26 28 I/O ST
RC2 — — — 27 29 — — — 27 29 I/O ST
RC3 — — — 36 39 — — — 36 39 I/O ST
RC4 — — — 37 40 — — — 37 40 I/O ST
RC5 — — — 38 41 — — — 38 41 I/O ST
RC6 — — — 2 2 — — — 2 2 I/O ST
RC7 — — — 3 3 — — — 3 3 I/O ST
RC8 — — — 4 4 — — — 4 4 I/O ST
RC9 — — — 5 5 — — — 5 5 I/O ST
REFO 18 26 23 15 16 18 26 23 15 16 O — Reference Clock Output
RTCC 17 25 22 14 15 17 25 22 14 15 O — Real-Time Clock/Calendar Output
SCK1 15 22 19 9 10 15 22 19 9 10 I/O ST SPI1 Serial Input/Output Clock
SCK2 2 14 11 38 41 2 14 11 38 41 I/O ST SPI2 Serial Input/Output Clock
SCL1 12 17 14 44 48 12 17 14 44 48 I/O I2C I2C1 Clock Input/Output
SCL2 18 7 4 24 26 18 7 4 24 26 I/O I2C I2C2 Clock Input/Output
SCLKI 10 12 9 34 37 10 12 9 34 37 I ST Digital Secondary Clock Input
SDA1 13 18 15 1 1 13 18 15 1 1 I/O I2C I2C1 Data Input/Output
SDA2 6 6 3 23 25 6 6 3 23 25 I/O I2C I2C2 Data Input/Output
SDI1 17 21 18 8 9 17 21 18 8 9 I ST SPI1 Serial Data Input
SDI2 4 19 16 36 39 4 19 16 36 39 I ST SPI2 Serial Data Input
SDO1 16 24 21 11 12 16 24 21 11 12 O — SPI1 Serial Data Output
SDO2 3 15123740 3 15123740O—SPI2 Serial Data Output
SOSCI 9 11 8 33 36 9 11 8 33 36 I ANA Secondary Oscillator Input
SOSCO 10 12 9 34 37 10 12 9 34 37 O ANA Secondary Oscillator Output
SS1 18 26 23 15 16 18 26 23 15 16 O — SPI1 Slave Select
SS2 15 23 20 35 38 15 23 20 35 38 O — SPI2 Slave Select
TABLE 1-3: PIC24FV32KA304 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Function
FFV
I/O Buffer Description
Pin Number Pin Numb er
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
PIC24FV32KA304 FAMILY
DS39995C-page 22 2011-2012 Microchip Technology Inc.
T1CK 13 18 15 1 1 13 18 15 1 1 I ST Timer1 Clock
T2CK 18 26 23 15 16 18 26 23 15 16 I ST Timer2 Clock
T3CK 18 26 23 15 16 18 26 23 15 16 I ST Timer3 Clock
T4CK 6 6 3 23 25 6 6 3 23 25 I ST Timer4 Clock
T5CK 6 6 3 23 25 6 6 3 23 25 I ST Timer5 Clock
U1CTS 12 17 14 44 48 12 17 14 44 48 I ST UART1 Clear-to-Send Input
U1RTS 13 18 15 1 1 13 18 15 1 1 O — UART1 Request-to-Send Output
U1RX 6632266322ISTUART1 Receive
U1TX 11 16 13 3 3 11 16 13 3 3 O — UART1 Transmit
U2CTS 10 12 9 34 37 10 12 9 34 37 I ST UART2 Clear-to-Send Input
U2RTS 9 11 8 33 36 9 11 8 33 36 O — UART2 Request-to-Send Output
U2RX 5 5 2 22 24 5 5 2 22 24 I ST UART2 Receive
U2TX 4 4 1 21 23 4 4 1 21 23 O — UART2 Transmit
ULPWU 4 4 1 21 23 4 4 1 21 23 I ANA Ultra Low-Power Wake-up Input
VCAP —————142017 7 7P—Core Power
VDD 20 28,13 25,10 17,28,40 18,30,43 20 28,13 25,10 17,28,40 18,30,43 P — Device Digital Supply Voltage
VREF+ 2 2 27 19 21 2 2 27 19 21 I ANA A/D Reference Voltage Input (+)
VREF- 3 3 28 20 22 3 3 28 20 22 I ANA A/D Reference Voltage Input (-)
VSS 19 27,8 24,5 16,29,39 17,31,42 19 27,8 24,5 16,29,39 17,31,42 P — Device Digital Ground Return
TABLE 1-3: PIC24FV32KA304 FAMILY PINOUT DESCRIPTIONS (CONTINUED)
Function
FFV
I/O Buffer Description
Pin Number Pin Numb er
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
20-Pin
PDIP/
SSOP/
SOIC
28-Pin
SPDIP/
SSOP/
SOIC
28-Pin
QFN
44-Pin
QFN/
TQFP
48-Pin
UQFN
2011-2012 Microchip Technology Inc. DS39995C-page 23
PIC24FV32KA304 FAMILY
2.0 GUIDELINES FOR GETTING
STARTED WITH 16-BIT
MICROCONTROLLERS
2.1 Basic Connection Requirements
Getting started with the PIC24FV32KA304 family
family of 16-bit microcontrollers requires attention to a
minimal set of device pin connections before
proceeding with development.
The following pins must always be connected:
•All V
DD and VSS pins
(see Section 2.2 “Power Supply Pins”)
•All AV
DD and AVSS pins, regardless of whether or
not the analog device features are used
(see Section 2.2 “Power Supply Pins”)
•MCLR
pin
(see Section 2.3 “Master Clear (MCLR) Pin”)
•V
CAP pins
(see Section 2.4 “Voltage Regulator Pin (VCAP)”)
These pins must also be connected if they are being
used in the end application:
• PGECx/PGEDx pins used for In-Circuit Serial
Programming™ (ICSP™) and debugging purposes
(see Section 2.5 “ICSP Pins”)
• OSCI and OSCO pins when an external oscillator
source is used
(see Section 2.6 “External Oscillator Pins”)
Additionally, the following pins may be required:
•V
REF+/VREF- pins are used when external voltage
reference for analog modules is implemented
The minimum mandatory connections are shown in
Figure 2-1.
FIGURE 2-1: RECOMMENDED
MINIMUM CONNECTIONS
Note: The AVDD and AVSS pins must always be
connected, regardless of whether any of
the analog modules are being used.
PIC24FXXKXX
VDD
VSS
VDD
VSS
VSS
VDD
AVDD
AVSS
VDD
VSS
C1
R1
VDD
MCLR
VCAP
R2
C7
C2(2)
C3(2)
C4(2)
C5(2)
C6(2)
Key (all values are recommendations):
C1 through C6: 0.1 F, 20V ceramic
C7: 10 F, 16V tantalum or ceramic
R1: 10 kΩ
R2: 100Ω to 470Ω
Note 1: See Section 2.4 “Voltage Regulator Pin
(VCAP)” for explanation of VCAP pin
connections.
2: The example shown is for a PIC24F device
with five VDD/VSS and AVDD/AVSS pairs.
Other devices may have more or less pairs;
adjust the number of decoupling capacitors
appropriately.
3: Some PIC24F K parts do not have a
regulator.
(1)
(3)
PIC24FV32KA304 FAMILY
DS39995C-page 24 2011-2012 Microchip Technology Inc.
2.2 Power Supply Pins
2.2.1 DECOUPLING CAPACITORS
The use of decoupling capacitors on every pair of
power supply pins, such as VDD, VSS, AVDD and
AVSS, is required.
Consider the following criteria when using decoupling
capacitors:
•Value and type of capacitor: A 0.1 F (100 nF),
10-20V capacitor is recommended. The capacitor
should be a low-ESR device, with a resonance
frequency in the range of 200 MHz and higher.
Ceramic capacitors are recommended.
•Placement on the printed circuit board: The
decoupling capacitors should be placed as close
to the pins as possible. It is recommended to
place the capacitors on the same side of the
board as the device. If space is constricted, the
capacitor can be placed on another layer on the
PCB using a via; however, ensure that the trace
length from the pin to the capacitor is no greater
than 0.25 inch (6 mm).
•Handling high-frequency noise: If the board is
experiencing high-frequency noise (upward of
tens of MHz), add a second ceramic type capaci-
tor in parallel to the above described decoupling
capacitor. The value of the second capacitor can
be in the range of 0.01 F to 0.001 F. Place this
second capacitor next to each primary decoupling
capacitor. In high-speed circuit designs, consider
implementing a decade pair of capacitances as
close to the power and ground pins as possible
(e.g., 0.1 F in parallel with 0.001 F).
•Maximizing performance: On the board layout
from the power supply circuit, run the power and
return traces to the decoupling capacitors first,
and then to the device pins. This ensures that the
decoupling capacitors are first in the power chain.
Equally important is to keep the trace length
between the capacitor and the power pins to a
minimum, thereby reducing PCB trace
inductance.
2.2.2 TANK CAPACITORS
On boards with power traces running longer than
six inches in length, it is suggested to use a tank capac-
itor for integrated circuits, including microcontrollers, to
supply a local power source. The value of the tank
capacitor should be determined based on the trace
resistance that connects the power supply source to
the device, and the maximum current drawn by the
device in the application. In other words, select the tank
capacitor so that it meets the acceptable voltage sag at
the device. Typical values range from 4.7 F to 47 F.
2.3 Master Clear (MCLR) Pin
The MCLR pin provides two specific device
functions: Device Reset, and Device Programming
and Debugging. If programming and debugging are
not required in the end application, a direct
connection to VDD may be all that is required. The
addition of other components, to help increase the
application’s resistance to spurious Resets from
voltage sags, may be beneficial. A typical
configuration is shown in Figure 2-1. Other circuit
designs may be implemented, depending on the
application’s requirements.
During programming and debugging, the resistance
and capacitance that can be added to the pin must
be considered. Device programmers and debuggers
drive the MCLR pin. Consequently, specific voltage
levels (VIH and VIL) and fast signal transitions must
not be adversely affected. Therefore, specific values
of R1 and C1 will need to be adjusted based on the
application and PCB requirements. For example, it is
recommended that the capacitor, C1, be isolated
from the MCLR pin during programming and
debugging operations by using a jumper (Figure 2-2).
The jumper is replaced for normal run-time
operations.
Any components associated with the MCLR pin
should be placed within 0.25 inch (6 mm) of the pin.
FIGURE 2-2: EXAMPLE OF MCLR PIN
CONNECTIONS
Note 1: R1 10 k is recommended. A suggested
starting value is 10 k. Ensure that the
MCLR pin VIH and VIL specifications are met.
2: R2 470 will limit any current flowing into
MCLR from the external capacitor, C, in the
event of MCLR pin breakdown, due to
Electrostatic Discharge (ESD) or Electrical
Overstress (EOS). Ensure that the MCLR pin
VIH and VIL specifications are met.
C1
R2
R1
VDD
MCLR
PIC24FXXKXX
JP
2011-2012 Microchip Technology Inc. DS39995C-page 25
PIC24FV32KA304 FAMILY
2.4 Voltage Regulator Pin (VCAP)
Some of the PIC24F K devices have an internal voltage
regulator. These devices have the voltage regulator
output brought out on the VCAP pin. On the PIC24F K
devices with regulators, a low-ESR (< 5Ω) capacitor is
required on the VCAP pin to stabilize the voltage
regulator output. The VCAP pin must not be connected to
VDD and must use a capacitor of 10 µF connected to
ground. The type can be ceramic or tantalum. Suitable
examples of capacitors are shown in Table 2-1.
Capacitors with equivalent specifications can be used.
Designers may use Figure 2-3 to evaluate ESR
equivalence of candidate devices.
The placement of this capacitor should be close to VCAP.
It is recommended that the trace length not exceed
0.25 inch (6 mm). Refer to Section 29.0 “Electrical
Characteristics” for additional information.
Refer to Section 29.0 “Electrical Characteristic s” for
information on VDD and VDDCORE.
FIGURE 2-3: FREQUENCY vs. ESR
PERFORMANCE FOR
SUGGESTED VCAP
Note: This section applies only to PIC24F K
devices with an on-chip voltage regulator.
10
1
0.1
0.01
0.001 0.01 0.1 1 10 100 1000 10,000
Frequ en cy (MH z)
ESR ()
Note: Typical data measurement at 25°C, 0V DC bias.
TABLE 2-1: SUITABLE CAPACITOR EQUIVALENTS
Make Part # Nominal
Capacitance Base Tolerance Rated Voltage Temp. Range
TDK C3216X7R1C106K 10 µF ±10% 16V -55 to 125ºC
TDK C3216X5R1C106K 10 µF ±10% 16V -55 to 85ºC
Panasonic ECJ-3YX1C106K 10 µF ±10% 16V -55 to 125ºC
Panasonic ECJ-4YB1C106K 10 µF ±10% 16V -55 to 85ºC
Murata GRM32DR71C106KA01L 10 µF ±10% 16V -55 to 125ºC
Murata GRM31CR61C106KC31L 10 µF ±10% 16V -55 to 85ºC
PIC24FV32KA304 FAMILY
DS39995C-page 26 2011-2012 Microchip Technology Inc.
2.4.1 CONSIDERATIONS FOR CERAMIC
CAPACITORS
In recent years, large value, low-voltage, surface-mount
ceramic capacitors have become very cost effective in
sizes up to a few tens of microfarad. The low-ESR, small
physical size and other properties make ceramic
capacitors very attractive in many types of applications.
Ceramic capacitors are suitable for use with the inter-
nal voltage regulator of this microcontroller. However,
some care is needed in selecting the capacitor to
ensure that it maintains sufficient capacitance over the
intended operating range of the application.
Typical low-cost, 10 F ceramic capacitors are available
in X5R, X7R and Y5V dielectric ratings (other types are
also available, but are less common). The initial toler-
ance specifications for these types of capacitors are
often specified as ±10% to ±20% (X5R and X7R), or
-20%/+80% (Y5V). However, the effective capacitance
that these capacitors provide in an application circuit will
also vary based on additional factors, such as the
applied DC bias voltage and the temperature. The total
in-circuit tolerance is, therefore, much wider than the
initial tolerance specification.
The X5R and X7R capacitors typically exhibit satisfac-
tory temperature stability (ex: ±15% over a wide
temperature range, but consult the manufacturer’s data
sheets for exact specifications). However, Y5V capaci-
tors typically have extreme temperature tolerance
specifications of +22%/-82%. Due to the extreme
temperature tolerance, a 10 F nominal rated Y5V type
capacitor may not deliver enough total capacitance to
meet minimum internal voltage regulator stability and
transient response requirements. Therefore, Y5V
capacitors are not recommended for use with the
internal regulator if the application must operate over a
wide temperature range.
In addition to temperature tolerance, the effective
capacitance of large value ceramic capacitors can vary
substantially, based on the amount of DC voltage
applied to the capacitor. This effect can be very signifi-
cant, but is often overlooked or is not always
documented.
A typical DC bias voltage vs. capacitance graph for
X7R type capacitors is shown in Figure 2-4.
FIGURE 2-4: DC BIAS VOLTAGE vs.
CAPACITANCE
CHARACTERISTICS
When selecting a ceramic capacitor to be used with the
internal voltage regulator, it is suggested to select a
high-voltage rating, so that the operating voltage is a
small percentage of the maximum rated capacitor volt-
age. For example, choose a ceramic capacitor rated at
16V for the 3.3V or 2.5V core voltage. Suggested
capacitors are shown in Table 2-1.
2.5 ICSP Pins
The PGC and PGD pins are used for In-Circuit Serial
Programming™ (ICSP™) and debugging purposes. It
is recommended to keep the trace length between the
ICSP connector and the ICSP pins on the device as
short as possible. If the ICSP connector is expected to
experience an ESD event, a series resistor is recom-
mended, with the value in the range of a few tens of
ohms, not to exceed 100Ω.
Pull-up resistors, series diodes and capacitors on the
PGC and PGD pins are not recommended as they will
interfere with the programmer/debugger communica-
tions to the device. If such discrete components are an
application requirement, they should be removed from
the circuit during programming and debugging. Alter-
natively, refer to the AC/DC characteristics and timing
requirements information in the respective device
Flash programming specification for information on
capacitive loading limits, and pin input voltage high
(VIH) and input low (VIL) requirements.
For device emulation, ensure that the “Communication
Channel Select” (i.e., PGCx/PGDx pins), programmed
into the device, matches the physical connections for
the ICSP to the Microchip debugger/emulator tool.
For more information on available Microchip
development tools connection requirements, refer to
Section 27.0 “Development Support”.
-80
-70
-60
-50
-40
-30
-20
-10
0
10
5 1011121314151617
DC Bias Voltage (VDC)
Capacitance Change (%)
01234 67 89
16V Capacitor
10V Capacitor
6.3V Capacitor
2011-2012 Microchip Technology Inc. DS39995C-page 27
PIC24FV32KA304 FAMILY
2.6 External Oscillator Pins
Many microcontrollers have options for at least two
oscillators: a high-frequency primary oscillator and a
low-frequency secondary oscillator (refer to for
Section 9.0 “Oscillator Configuration”details).
The oscillator circuit should be placed on the same
side of the board as the device. Place the oscillator
circuit close to the respective oscillator pins with no
more than 0.5 inch (12 mm) between the circuit
components and the pins. The load capacitors should
be placed next to the oscillator itself, on the same side
of the board.
Use a grounded copper pour around the oscillator cir-
cuit to isolate it from surrounding circuits. The
grounded copper pour should be routed directly to the
MCU ground. Do not run any signal traces or power
traces inside the ground pour. Also, if using a two-sided
board, avoid any traces on the other side of the board
where the crystal is placed.
Layout suggestions are shown in Figure 2-5. In-line
packages may be handled with a single-sided layout
that completely encompasses the oscillator pins. With
fine-pitch packages, it is not always possible to com-
pletely surround the pins and components. A suitable
solution is to tie the broken guard sections to a mirrored
ground layer. In all cases, the guard trace(s) must be
returned to ground.
In planning the application’s routing and I/O assign-
ments, ensure that adjacent port pins and other
signals, in close proximity to the oscillator, are benign
(i.e., free of high frequencies, short rise and fall times,
and other similar noise).
For additional information and design guidance on
oscillator circuits, please refer to these Microchip
Application Notes, available at the corporate web site
(www.microchip.com):
•AN826, “Crystal Oscillator Basics and Crystal
Selection for rfPIC™ and PICmicro® Devices”
• AN849, “Basic PICmicro® Oscillator Design”
• AN943, “Practical PICmicro® Oscillator Analysis
and Design”
•AN949, “Ma king Your Osci ll ator Work ”
2.7 Unused I/Os
Unused I/O pins should be configured as outputs and
driven to a logic low state. Alternatively, connect a 1 kΩ
to 10 kΩ resistor to VSS on unused pins and drive the
output to logic low.
FIGURE 2-5: SUGGESTED PLACEMENT
OF THE OSCILLATOR
CIRCUIT
GND
`
`
`
OSC1
OSC2
T1OSO
T1OS I
Copper Pour Primary Oscillator
Crystal
Timer1 Oscillator
Crystal
DEVICE PINS
Primary
Oscillator
C1
C2
T1 Oscillator: C1 T1 Oscillator: C2
(tied to ground)
Single-Sided and In-Line Layouts:
Fine-Pitch (Dual-Sided) Layouts:
GND
OSCO
OSCI
Bottom Layer
Copper Pour
Oscillator
Crystal
Top Layer Copper Pour
C2
C1
DEVICE PINS
(tied to ground)
(tied to ground)
PIC24FV32KA304 FAMILY
DS39995C-page 28 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 29
PIC24FV32KA304 FAMILY
3.0 CPU
The PIC24F CPU has a 16-bit (data) modified Harvard
architecture with an enhanced instruction set and a
24-bit instruction word with a variable length opcode
field. The Program Counter (PC) is 23 bits wide and
addresses up to 4M instructions of user program
memory space. A single-cycle instruction prefetch
mechanism is used to help maintain throughput and
provides predictable execution. All instructions execute
in a single cycle, with the exception of instructions that
change the program flow, the double-word move
(MOV.D) instruction and the table instructions.
Overhead-free program loop constructs are supported
using the REPEAT instructions, which are interruptible
at any point.
PIC24F devices have sixteen, 16-bit working registers
in the programmer’s model. Each of the working
registers can act as a data, address or address offset
register. The 16th working register (W15) operates as a
Software Stack Pointer (SSP) for interrupts and calls.
The upper 32 Kbytes of the data space memory map
can optionally be mapped into program space at any
16K word boundary of either program memory or data
EEPROM memory, defined by the 8-bit Program Space
Visibility Page Address (PSVPAG) register. The
program to data space mapping feature lets any
instruction access program space as if it were data
space.
The Instruction Set Architecture (ISA) has been signifi-
cantly enhanced beyond that of the PIC18, but
maintains an acceptable level of backward compatibil-
ity. All PIC18 instructions and addressing modes are
supported, either directly, or through simple macros.
Many of the ISA enhancements have been driven by
compiler efficiency needs.
The core supports Inherent (no operand), Relative,
Literal, Memory Direct and three groups of addressing
modes. All modes support Register Direct and various
Register Indirect modes. Each group offers up to seven
addressing modes. Instructions are associated with
predefined addressing modes depending upon their
functional requirements.
For most instructions, the core is capable of executing
a data (or program data) memory read, a working
register (data) read, a data memory write and a pro-
gram (instruction) memory read per instruction cycle.
As a result, three parameter instructions can be
supported, allowing trinary operations (i.e., A + B = C)
to be executed in a single cycle.
A high-speed, 17-bit by 17-bit multiplier has been
included to significantly enhance the core arithmetic
capability and throughput. The multiplier supports
Signed, Unsigned and Mixed mode, 16-bit by 16-bit or
8-bit by 8-bit integer multiplication. All multiply
instructions execute in a single cycle.
The 16-bit ALU has been enhanced with integer divide
assist hardware that supports an iterative non-restoring
divide algorithm. It operates in conjunction with the
REPEAT instruction looping mechanism and a selection
of iterative divide instructions to support 32-bit (or
16-bit), divided by 16-bit integer signed and unsigned
division. All divide operations require 19 cycles to
complete but are interruptible at any cycle boundary.
The PIC24F has a vectored exception scheme with up
to eight sources of non-maskable traps and up to
118 interrupt sources. Each interrupt source can be
assigned to one of seven priority levels.
A block diagram of the CPU is illustrated in Figure 3-1.
3.1 Programmer’s Model
Figure 3-2 displays the programmer’s model for the
PIC24F. All registers in the programmer’s model are
memory mapped and can be manipulated directly by
instructions.
Table 3-1 provides a description of each register. All
registers associated with the programmer’s model are
memory mapped.
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on the
CPU, refer to the “PIC24F Family
Reference Manual”, Section 2. “CPU”
(DS39703).
PIC24FV32KA304 FAMILY
DS39995C-page 30 2011-2012 Microchip Technology Inc.
FIGURE 3-1: PIC24F CPU CORE BLOCK DIAGRAM
TABLE 3-1: CPU CORE REGISTERS
Register(s) Name Description
W0 through W15 Working Register Array
PC 23-Bit Program Counter
SR ALU STATUS Register
SPLIM Stack Pointer Limit Value Register
TBLPAG Table Memory Page Address Register
PSVPAG Program Space Visibility Page Address Register
RCOUNT Repeat Loop Counter Register
CORCON CPU Control Register
Instruction
Decode and
Control
PCH PCL
16
Program Counter
16-Bit ALU
23
23
24
23
Data Bus
Instruction Reg
16
16 x 16
W Register Array
Divide
Support
ROM Latch
16
EA MUX
RAGU
WAGU
16
16
8
Interrupt
Controller
PSV and Table
Data Access
Control Block
Stack
Control
Logic
Loop
Control
Logic
Data Latch
Data RAM
Address
Latch
Control Signals
to Various Blocks
Program Memory
Data Latch
Address Bus
16
Literal Data
16 16
Hardware
Multiplier
16
To Peripheral Modules
Address Latch
Data EEPROM
2011-2012 Microchip Technology Inc. DS39995C-page 31
PIC24FV32KA304 FAMILY
FIGURE 3-2: PROGRAM MER’S MODEL
NOVZ C
TBLPAG
22 0
7 0
015
Program Counter
Table Memory Page
ALU STATUS Register (SR)
Working/Address
Registers
W0 (WREG)
W1
W2
W3
W4
W5
W6
W7
W8
W9
W10
W11
W12
W13
Frame Pointer
Stack Pointer
PSVPAG
7 0 Program Space Visibility
RA
0
RCOUNT
15 0 Repeat Loop Counter
SPLIM Stack Pointer Limit
SRL
Registers or bits are shadowed for PUSH.S and POP.S instructions.
0
0
Page Address Register
15 0
CPU Control Register (CORCON)
SRH
W14
W15
DC IPL
210
———————
IPL3 PSV
————————————
——
PC
Divider Working Registers
Multiplier Registers
15 0
Value Register
Address Register
Register
PIC24FV32KA304 FAMILY
DS39995C-page 32 2011-2012 Microchip Technology Inc.
3.2 CPU Control Registers
REGISTER 3-1: SR: ALU STATUS REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0, HSC
— — — — — — —DC
bit 15 bit 8
R/W-0, HSC(1)R/W-0, HSC(1)R/W-0, HSC(1)R-0, HSC R/W-0, HSC R/W-0, HSC R/W-0, HSC R/W-0, HSC
IPL2(2)IPL1(2)IPL0(2)RA N OV Z C
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-9 Unimplemented: Read as ‘0’
bit 8 DC: ALU Half Carry/Borrow bit
1 = A carry-out from the 4th low-order bit (for byte-sized data) or 8th low-order bit (for word-sized data)
of the result occurred
0 = No carry-out from the 4th or 8th low-order bit of the result has occurred
bit 7-5 IPL<2:0>: CPU Interrupt Priority Level Status bits(1,2)
111 = CPU Interrupt Priority Level is 7 (15); user interrupts disabled
110 = CPU Interrupt Priority Level is 6 (14)
101 = CPU Interrupt Priority Level is 5 (13)
100 = CPU Interrupt Priority Level is 4 (12)
011 = CPU Interrupt Priority Level is 3 (11)
010 = CPU Interrupt Priority Level is 2 (10)
001 = CPU Interrupt Priority Level is 1 (9)
000 = CPU Interrupt Priority Level is 0 (8)
bit 4 RA: REPEAT Loop Active bit
1 = REPEAT loop in progress
0 = REPEAT loop not in progress
bit 3 N: ALU Negative bit
1 = Result was negative
0 = Result was non-negative (zero or positive)
bit 2 OV: ALU Overflow bit
1 = Overflow occurred for signed (2’s complement) arithmetic in this arithmetic operation
0 = No overflow has occurred
bit 1 Z: ALU Zero bit
1 = An operation, which effects the Z bit, has set it at some time in the past
0 = The most recent operation, which effects the Z bit, has cleared it (i.e., a non-zero result)
bit 0 C: ALU Carry/Borrow bit
1 = A carry-out from the Most Significant bit (MSb) of the result occurred
0 = No carry-out from the Most Significant bit (MSb) of the result occurred
Note 1: The IPLx Status bits are read-only when NSTDIS (INTCON1<15>) = 1.
2: The IPL<2:0> Status bits are concatenated with the IPL3 bit (CORCON<3>) to form the CPU Interrupt
Priority Level (IPL). The value in parentheses indicates the IPL when IPL3 = 1.
2011-2012 Microchip Technology Inc. DS39995C-page 33
PIC24FV32KA304 FAMILY
3.3 Arithmetic Logic Unit (ALU)
The PIC24F ALU is 16 bits wide and is capable of
addition, subtraction, bit shifts and logic operations.
Unless otherwise mentioned, arithmetic operations are
2’s complement in nature. Depending on the operation,
the ALU may affect the values of the Carry (C), Zero
(Z), Negative (N), Overflow (OV) and Digit Carry (DC)
Status bits in the SR register. The C and DC Status bits
operate as Borrow and Digit Borrow bits, respectively,
for subtraction operations.
The ALU can perform 8-bit or 16-bit operations,
depending on the mode of the instruction that is used.
Data for the ALU operation can come from the W
register array, or data memory, depending on the
addressing mode of the instruction. Likewise, output
data from the ALU can be written to the W register array
or a data memory location.
The PIC24F CPU incorporates hardware support for
both multiplication and division. This includes a
dedicated hardware multiplier and support hardware
division for 16-bit divisor.
3.3.1 MULTIPLIER
The ALU contains a high-speed, 17-bit x 17-bit
multiplier. It supports unsigned, signed or mixed sign
operation in several multiplication modes:
• 16-bit x 16-bit signed
• 16-bit x 16-bit unsigned
• 16-bit signed x 5-bit (literal) unsigned
• 16-bit unsigned x 16-bit unsigned
• 16-bit unsigned x 5-bit (literal) unsigned
• 16-bit unsigned x 16-bit signed
• 8-bit unsigned x 8-bit unsigned
REGISTER 3-2: CORCON: CPU CONTROL REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 R/C-0, HSC R/W-0 U-0 U-0
————IPL3
(1)PSV — —
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-4 Unimplemented: Read as ‘0’
bit 3 IPL3: CPU Interrupt Priority Level Status bit(1)
1 = CPU Interrupt Priority Level is greater than 7
0 = CPU Interrupt Priority Level is 7 or less
bit 2 PSV: Program Space Visibility in Data Space Enable bit
1 = Program space is visible in data space
0 = Program space is not visible in data space
bit 1-0 Unimplemented: Read as ‘0’
Note 1: User interrupts are disabled when IPL3 = 1.
PIC24FV32KA304 FAMILY
DS39995C-page 34 2011-2012 Microchip Technology Inc.
3.3.2 DIVIDER
The divide block supports 32-bit/16-bit and 16-bit/16-bit
signed and unsigned integer divide operations with the
following data sizes:
1. 32-bit signed/16-bit signed divide
2. 32-bit unsigned/16-bit unsigned divide
3. 16-bit signed/16-bit signed divide
4. 16-bit unsigned/16-bit unsigned divide
The quotient for all divide instructions ends up in W0
and the remainder in W1. Sixteen-bit signed and
unsigned DIV instructions can specify any W register
for both the 16-bit divisor (Wn), and any W register
(aligned) pair (W(m + 1):Wm) for the 32-bit dividend.
The divide algorithm takes one cycle per bit of divisor,
so both 32-bit/16-bit and 16-bit/16-bit instructions take
the same number of cycles to execute.
3.3.3 MULTI-BIT SHIFT SUPPORT
The PIC24F ALU supports both single bit and
single-cycle, multi-bit arithmetic and logic shifts.
Multi-bit shifts are implemented using a shifter block,
capable of performing up to a 15-bit arithmetic right
shift, or up to a 15-bit left shift, in a single cycle. All
multi-bit shift instructions only support Register Direct
Addressing for both the operand source and result
destination.
A full summary of instructions that use the shift
operation is provided in Table 3-2.
TABLE 3-2: INSTRUCTIONS THAT USE THE SINGLE AND MULTI-BIT SHIFT OPERATION
Instruction Description
ASR Arithmetic shift right source register by one or more bits.
SL Shift left source register by one or more bits.
LSR Logical shift right source register by one or more bits.
PIC24FV32KA304 FAMILY
DS39995C-page 35 2011-2012 Microchip Technology Inc.
4.0 MEMORY ORGANIZATION
As Harvard architecture devices, the PIC24F
microcontrollers feature separate program and data
memory space and bussing. This architecture also
allows the direct access of program memory from the
data space during code execution.
4.1 Program Address Space
The program address memory space of the
PIC24FV32KA304 family is 4M instructions. The space
is addressable by a 24-bit value derived from either the
23-bit Program Counter (PC) during program execution,
or from a table operation or data space remapping, as
described in Section 4.3 “Interfacing Program and
Dat a Mem o ry Spaces”.
User access to the program memory space is restricted
to the lower half of the address range (000000h to
7FFFFFh). The exception is the use of TBLRD/TBLWT
operations, which use TBLPAG<7> to permit access to
the Configuration bits and Device ID sections of the
configuration memory space.
Memory maps for the PIC24FV32KA304 family of
devices are shown in Figure 4-1.
FIGURE 4-1: PROGRAM SPACE MEMORY MAP FOR PIC24FV32KA304 FAMILY DEVICES
000000h
0000FEh
000002h
000100h
F80010h
F80012h
FEFFFEh
FFFFFFh
000004h
000200h
0001FEh
000104h
Configuration Memory Space User Memory Space
Note: Memory areas are not displayed to scale.
Reset Address
Device Config Registers
DEVID (2)
GOTO Instruction
Reserved
Alternate Vector Table
Reserved
Interrupt Vector Table
PIC24FV32KA304
FF0000h
F7FFFEh
F80000h
800000h
7FFFFFh
Reserved
Unimplemented
Read ‘0’
Reset Address
DEVID (2)
GOTO Instruction
Reserved
Alternate Vector Table
Reserved
Interrupt Vector Table
PIC24FV16KA304
Device Config Registers
Reserved
Unimplemented
Read ‘0’
002BFEh
User Flash
Program Memory
(11264 instructions)
7FFE00h
Data EEPROM
Data EEPROM
Flash
Program Memory
(5632 instructions)
0057FEh
2011-2012 Microchip Technology Inc. DS39995C-page 36
PIC24FV32KA304 FAMILY
4.1.1 PROGRAM MEMORY
ORGANIZATION
The program memory space is organized in
word-addressable blocks. Although it is treated as
24 bits wide, it is more appropriate to think of each
address of the program memory as a lower and upper
word, with the upper byte of the upper word being
unimplemented. The lower word always has an even
address, while the upper word has an odd address, as
shown in Figure 4-2.
Program memory addresses are always word-aligned
on the lower word, and addresses are incremented or
decremented by two during code execution. This
arrangement also provides compatibility with data
memory space addressing and makes it possible to
access data in the program memory space.
4.1.2 HARD MEMORY VECTORS
All PIC24F devices reserve the addresses between
00000h and 000200h for hard coded program
execution vectors. A hardware Reset vector is provided
to redirect code execution from the default value of the
PC on device Reset to the actual start of code. A GOTO
instruction is programmed by the user at 000000h, with
the actual address for the start of code at 000002h.
PIC24F devices also have two Interrupt Vector Tables,
located from 000004h to 0000FFh and 000104h to
0001FFh. These vector tables allow each of the many
device interrupt sources to be handled by separate
Interrupt Service Routines (ISRs). A more detailed
discussion of the Interrupt Vector Tables (IVT) is
provided in Section 8.1 “Interrupt Vector Table
(IVT)”.
4.1.3 DATA EEPROM
In the PIC24FV32KA304 family, the data EEPROM is
mapped to the top of the user program memory space,
starting at address, 7FFE00, and expanding up to
address, 7FFFFF.
The data EEPROM is organized as 16-bit wide memory
and 256 words deep. This memory is accessed using
table read and write operations similar to the user code
memory.
4.1.4 DEVICE CONFIGURATION WORDS
Table 4-1 provides the addresses of the device
Configuration Words for the PIC24FV32KA304 family.
Their location in the memory map is shown in
Figure 4-1.
For more information on device Configuration Words,
see Section 26.0 “ S pecial Features”.
TABLE 4-1: DEVICE CONFIGURATION
WORDS FOR PIC24FV32KA304
FAMILY DEVICE S
FIGURE 4-2: PROGRAM MEMORY ORGANIZATION
Configuration Words Configuration Word
Addresses
FBS F80000
FGS F80004
FOSCSEL F80006
FOSC F80008
FWDT F8000A
FPOR F8000C
FICD F8000E
FDS F80010
0816
PC Address
000000h
000002h
000004h
000006h
23
00000000
00000000
00000000
00000000
Program Memory
‘Phantom’ Byte
(read as ‘
0
’)
least significant word
most significant word
Instruction Width
000001h
000003h
000005h
000007h
msw
Address (lsw Address)
PIC24FV32KA304 FAMILY
DS39995C-page 37 2011-2012 Microchip Technology Inc.
4.2 Data Address Sp ace
The PIC24F core has a separate, 16-bit wide data
memory space, addressable as a single linear range.
The data space is accessed using two Address
Generation Units (AGUs), one each for read and write
operations. The data space memory map is shown in
Figure 4-3.
All Effective Addresses (EAs) in the data memory space
are 16 bits wide and point to bytes within the data space.
This gives a data space address range of 64 Kbytes or
32K words. The lower half of the data memory space
(that is, when EA<15> = 0) is used for implemented
memory addresses, while the upper half (EA<15> = 1) is
reserved for the Program Space Visibility (PSV) area
(see Section 4.3.3 “Reading Data From Program
Memory Using Program Spa ce Visibility”).
PIC24FV32KA304 family devices implement a total of
1024 words of data memory. If an EA points to a
location outside of this area, an all zero word or byte will
be returned.
4.2.1 DATA SPACE WIDTH
The data memory space is organized in
byte-addressable, 16-bit wide blocks. Data is aligned in
data memory and registers as 16-bit words, but all the
data space EAs resolve to bytes. The Least Significant
Bytes (LSBs) of each word have even addresses, while
the Most Significant Bytes (MSBs) have odd
addresses.
FIGURE 4-3: DATA SPACE MEMORY MAP FOR PIC24FV32KA304 FAMILY DEVICES
0000h
07FEh
FFFEh
LSB
Address
LSBMSB
MSB
Address
0001h
07FFh
0FFFh
FFFFh
8001h 8000h
7FFFh
0801h 0800h Near
0FFEh
SFR
SFR Space
Data RAM
7FFFh
Program Space
Visibility Area
Note: Data memory areas are not shown to scale.
1FFEh
1FFF
Space
Data Space
Implemented
Data RAM
Unimplemented
Read as ‘0’
2011-2012 Microchip Technology Inc. DS39995C-page 38
PIC24FV32KA304 FAMILY
4.2.2 DATA MEMORY ORGANIZATION
AND ALIGNMENT
To maintain backward compatibility with PIC® devices
and improve data space memory usage efficiency, the
PIC24F instruction set supports both word and byte
operations. As a consequence of byte accessibility, all
Effective Address (EA) calculations are internally
scaled to step through word-aligned memory. For
example, the core recognizes that Post-Modified
Register Indirect Addressing mode [Ws++] will result in
a value of Ws + 1 for byte operations and Ws + 2 for
word operations.
Data byte reads will read the complete word, which
contains the byte, using the LSB of any EA to
determine which byte to select. The selected byte is
placed onto the LSB of the data path. That is, data
memory and the registers are organized as two
parallel, byte-wide entities with shared (word) address
decode, but separate write lines. Data byte writes only
write to the corresponding side of the array or register,
which matches the byte address.
All word accesses must be aligned to an even address.
Misaligned word data fetches are not supported, so
care must be taken when mixing byte and word
operations, or translating from 8-bit MCU code. If a
misaligned read or write is attempted, an address error
trap will be generated. If the error occurred on a read,
the instruction underway is completed; if it occurred on
a write, the instruction will be executed, but the write
will not occur. In either case, a trap is then executed,
allowing the system and/or user to examine the
machine state prior to execution of the address Fault.
All byte loads into any W register are loaded into the
LSB; the MSB is not modified.
A Sign-Extend (SE) instruction is provided to allow the
users to translate 8-bit signed data to 16-bit signed
values. Alternatively, for 16-bit unsigned data, users
can clear the MSB of any W register by executing a
Zero-Extend (ZE) instruction on the appropriate
address.
Although most instructions are capable of operating on
word or byte data sizes, it should be noted that some
instructions operate only on words.
4.2.3 NEAR DATA SPACE
The 8-Kbyte area between 0000h and 1FFFh is
referred to as the Near Data Space (NDS). Locations in
this space are directly addressable via a 13-bit abso-
lute address field within all memory direct instructions.
The remainder of the data space is addressable
indirectly. Additionally, the whole data space is
addressable using MOV instructions, which support
Memory Direct Addressing (MDA) with a 16-bit address
field. For PIC24FV32KA304 family devices, the entire
implemented data memory lies in Near Data Space.
4.2.4 SFR SPACE
The first 2 Kbytes of the Near Data Space, from 0000h
to 07FFh, are primarily occupied with Special Function
Registers (SFRs). These are used by the PIC24F core
and peripheral modules for controlling the operation of
the device.
SFRs are distributed among the modules that they
control and are generally grouped together by the
module. Much of the SFR space contains unused
addresses; these are read as ‘0’. The SFR space,
where the SFRs are actually implemented, is provided
in Ta b l e 4 - 2 . Each implemented area indicates a
32-byte region, where at least one address is
implemented as an SFR. A complete listing of
implemented SFRs, including their addresses, is
provided in Table 4-3 through Ta b l e 4 - 2 5 .
TABLE 4-2: IMPLEMENTED REGIONS OF SFR DATA SPACE
SFR Space Address
xx00 xx20 xx40 xx60 xx80 xxA0 xxC0 xxE0
000h Core ICN Interrupts —
100h Timers Capture —Compare— — —
200h I2C™ UART SPI ——I/O
300h A/D/CMTU — — — —
400h — — — — — — — —
500h — — — — — — — —
600h — RTC/Comp CRC — —
700h —— System/DS/HLVD NVM/PMD — — — —
Legend: — = No implemented SFRs in this block.
PIC24FV32KA304 FAMILY
DS39995C-page 39 2011-2012 Microchip Technology Inc.
TABLE 4-3: CPU CORE REGISTERS MAP
File Name Start
Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
WREG0 0000 WREG0 0000
WREG1 0002 WREG1 0000
WREG2 0004 WREG2 0000
WREG3 0006 WREG3 0000
WREG4 0008 WREG4 0000
WREG5 000A WREG5 0000
WREG6 000C WREG6 0000
WREG7 000E WREG7 0000
WREG8 0010 WREG8 0000
WREG9 0012 WREG9 0000
WREG10 0014 WREG10 0000
WREG11 0016 WREG11 0000
WREG12 0018 WREG12 0000
WREG13 001A WREG13 0000
WREG14 001C WREG14 0000
WREG15 001E WREG15 0000
SPLIM 0020 SPLIM xxxx
PCL 002E PCL 0000
PCH 0030 — — — — — — — — —PCH0000
TBLPAG 0032 — — — — — — — —TBLPAG0000
PSVPAG 0034 — — — — — — — —PSVPAG0000
RCOUNT 0036 RCOUNT xxxxx
SR 0042 — — — — — — — DC IPL2 IPL1 IPL0 RA N OV Z C 0000
CORCON 0044 — — — — — — — — — — — — IPL3 PSV — — 0000
DISICNT 0052 — — DISICNT xxxx
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
2011-2012 Microchip Technology Inc. DS39995C-page 40
PIC24FV32KA304 FAMILY
TABLE 4-4: ICN REGISTER MAP
File
Name Add r B it 15 Bit 14 Bit 13 Bit 12 Bit 1 1 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
CNPD1 0056 CN15PDE
(1)
CN14PDE CN13PDE CN12PDE CN11PDE CN10PDE
(1,2)
CN9PDE
(1)
CN8PDE
(3)
CN7PDE
(1)
CN6PDE CN5PDE CN4PDE CN3PDE CN2PDE CN1PDE CN0PDE
0000
CNPD2 0058 CN31PDE
(1,2)
CN30PDE CN29PDE CN28PDE
(1,2)
CN27PDE
(1)
CN26PDE
(1,2)
CN25PDE
(1,2)
CN24PDE
(1)
CN23PDE CN22PDE CN21PDE CN20PDE
(1,2)
CN19PDE
(1,2)
CN18PDE
(1,2)
CN17PDE
(1,2)
CN16PDE
(1)
0000
CNPD3 005A — — — — — — — — — — —CN36PDE
(1,2)
CN35PDE
(1,2)
CN34PDE
(1,2)
CN33PDE
(1,2)
CN32PDE
(1,2)
0000
CNEN1 0062 CN15IE
(1)
CN14IE CN13IE CN12IE CN11IE CN10IE
(1,2)
CN9IE
(1)
CN8IE
(3)
CN7IE
(1)
CN6IE CN5IE CN4IE CN3IE CN2IE CN1IE CN0IE
0000
CNEN2 0064 CN31IE
(1,2)
CN30IE CN29IE CN28IE
(1,2)
CN27IE
(1)
CN26IE
(1,2)
CN25IE
(1,2)
CN24IE
(1)
CN23IE CN22IE CN21IE CN20IE
(1,2)
CN19IE
(1,2)
CN18IE
(1,2)
CN17IE
(1,2)
CN16IE
(1)
0000
CNEN3 0066 — — — — — — — — — — —CN36IE
(1,2)
CN35IE
(1,2)
CN34IE
(1,2)
CN33IE
(1,2)
CN32IE
(1,2)
0000
CNPU1 006E CN15PUE
(1)
CN14PUE CN13PUE CN12PUE CN11PUE CN10PUE
(1,2)
CN9PUE
(1)
CN8PUE
(3)
CN7PUE
(1)
CN6PUE CN5PUE CN4PUE CN3PUE CN2PUE CN1PUE CN0PUE
0000
CNPU2 0070 CN31PUE
(1,2)
CN30PUE CN29PUE CN28PUE
(1,2)
CN27PUE
(1)
CN26PUE
(1,2)
CN25PUE
(1,2)
CN24PUE
(1)
CN23PUE CN22PUE CN21PUE CN20PUE
(1,2)
CN19PUE
(1,2)
CN18PUE
(1,2)
CN17PUE
(1,2)
CN16PUE
(1)
0000
CNPU3 0072 — — — — — — — — — — —CN36PUE
(1,2)
CN35PUE
(1,2)
CN34PUE
(1,2)
CN33PUE
(1,2)
CN32PUE
(1,2)
0000
Legend:
— = unimplemented, read as ‘
0
’. Reset values are shown in hexadecimal.
Note 1:
These bits are not implemented in 20-pin devices.
2:
These bits are not implemented in 28-pin devices.
3:
These bits are not implemented in FV devices.
PIC24FV32KA304 FAMILY
DS39995C-page 41 2011-2012 Microchip Technology Inc.
TABLE 4-5: INTERRUPT CONTROLLER REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 1 1 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
INTCON1 0080 NSTDIS — — — — — — — — — — MATHERR ADDRERR STKERR OSCFAIL —
0000
INTCON2 0082 ALTIVT DISI — — — — — — — — — — — INT2EP INT1EP INT0EP
0000
IFS0 0084 NVMIF — AD1IF U1TXIF U1RXIF SPI1IF SPF1IF T3IF T2IF OC2IF IC2IF — T1IF OC1IF IC1IF INT0IF
0000
IFS1 0086 U2TXIF U2RXIF INT2IF T5IF T4IF —OC3IF — — — — INT1IF CNIF CMIF MI2C1IF SI2C1IF
0000
IFS2 0088 — — — — — — — — — —IC3IF— — — SPI2IF SPF2IF
0000
IFS3 008A —RTCIF — — — — — — — — — — — MI2C2IF SI2C2IF —
0000
IFS4 008C ——CTMUIF— — — —HLVDIF— — — — CRCIF U2ERIF U1ERIF —
0000
IFS5 008E — — — — — — — — — — — — — — —ULPWUIF
0000
IEC0 0094 NVMIE — AD1IE U1TXIE U1RXIE SPI1IE SPF1IE T3IE T2IE OC2IE IC2IE — T1IE OC1IE IC1IE INT0IE
0000
IEC1 0096 U2TXIE U2RXIE INT2IE T5IE T4IE —OC3IE — — — — INT1IE CNIE CMIE MI2C1IE SI2C1IE
0000
IEC2 0098 — — — — — — — — — —IC3IE— — — SPI2IE SPF2IE
0000
IEC3 009A —RTCIE — — — — — — — — — — — MI2C2IE SI2C2IE —
0000
IEC4 009C ——CTMUIE— — — —HLVDIE— — — — CRCIE U2ERIE U1ERIE —
0000
IEC5 009E — — — — — — — — — — — — — — —ULPWUIE
0000
IPC0 00A4 — T1IP2 T1IP1 T1IP0 — OC1IP2 OC1IP1 OC1IP0 — IC1IP2 IC1IP1 IC1IP0 — INT0IP2 INT0IP1 INT0IP0
4444
IPC1 00A6 — T2IP2 T2IP1 T2IP0 — OC2IP2 OC2IP1 OC2IP0 — IC2IP2 IC2IP1 IC2IP0 — — — —
4444
IPC2 00A8 — U1RXIP2 U1RXIP1 U1RXIP0 — SPI1IP2 SPI1IP1 SPI1IP0 — SPF1IP2 SPF1IP1 SPF1IP0 — T3IP2 T3IP1 T3IP0
4444
IPC3 00AA — NVMIP2 NVMIP1 NVMIP0 — — — — — AD1IP2 AD1IP1 AD1IP0 — U1TXIP2 U1TXIP1 U1TXIP0
4044
IPC4 00AC — CNIP2 CNIP1 CNIP0 — CMIP2 CMIP1 CMIP0 — MI2C1P2 MI2C1P1 MI2C1P0 — SI2C1P2 SI2C1P1 SI2C1P0
4444
IPC5 00AE — — — — — — — — — — — — — INT1IP2 INT1IP1 INT1IP0
0004
IPC6 00B0 — T4IP2 T4IP1 T4IP0 — — — — — OC3IP2 OC3IP1 OC3IP0 — — — —
4040
IPC7 00B2 — U2TXIP2 U2TXIP1 U2TXIP0 — U2RXIP2 U2RXIP1 U2RXIP0 — INT2IP2 INT2IP1 INT2IP0 — T5IP2 T5IP1 T5IP0
4440
IPC8 00B4 — — — — — — — — — SPI2IP2 SPI2IP1 SPI2IP0 — SPF2IP2 SPF2IP1 SPF2IP0
0044
IPC9 00B6 — — — — — — — — — IC3IP2 IC3IP1 IC3IP0 — — — —
0040
IPC12 00BC — — — — — MI2C2IP2 MI2C2IP1 MI2C2IP0 — SI2C2IP2 SI2C2IP1 SI2C2IP0 — — — —
0440
IPC15 00C2 — — — — — RTCIP2 RTCIP1 RTCIP0 — — — — — — — —
0400
IPC16 00C4 — CRCIP2 CRCIP1 CRCIP0 — U2ERIP2 U2ERIP1 U2ERIP0 — U1ERIP2 U1ERIP1 U1ERIP0 — — — —
4440
IPC18 00C8 — — — — — — — — — — — — — HLVDIP2 HLVDIP1 HLVDIP0
0004
IPC19 00CA — — — — — — — — — CTMUIP2 CTMUIP1 CTMUIP0 — — — —
0040
IPC20 00CC — — — — — — — — — — — — — ULPWUIP2 ULPWUIP1 ULPWUIP0
0000
INTTREG 00E0 CPUIRQ —VHOLD— ILR3 ILR2 ILR1 ILR0 — VECNUM6 VECNUM5 VECNUM4 VECNUM3 VECNUM2 VECNUM1 VECNUM0
0000
Legend:
— = unimplemented, read as ‘
0
’. Reset values are shown in hexadecimal.
2011-2012 Microchip Technology Inc. DS39995C-page 42
PIC24FV32KA304 FAMILY
TABLE 4-6: TIMER REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
TMR1 0100 TMR1 0000
PR1 0102 PR1 FFFF
T1CON 0104 TON —TSIDL——— T1ECS1 T1ECS0 — TGATE TCKPS1 TCKPS0 — TSYNC TCS —0000
TMR2 0106 TMR2 0000
TMR3HLD 0108 TMR3HLD 0000
TMR3 010A TMR3 0000
PR2 010C PR2 0000
PR3 010E PR3 FFFF
T2CON 0110 TON —TSIDL—————— TGATE TCKPS1 TCKPS0 T32 —TCS—FFFF
T3CON 0112 TON —TSIDL—————— TGATE TCKPS1 TCKPS0 ——TCS—0000
TMR4 0114 TMR4 0000
TMR5HLD 0116 TMR5HLD 0000
TMR5 0118 TMR5 0000
PR4 011A PR4 FFFF
PR5 011C PR5 FFFF
T4CON 011E TON —TSIDL—————— TGATE TCKPS1 TCKPS0 T45 —TCS—0000
T5CON 0120 TON —TSIDL—————— TGATE TCKPS1 TCKPS0 ——TCS—0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-7: INPUT CAPTURE REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
IC1CON1 0140 —— ICSIDL ICTSEL2 ICTSEL1 ICTSEL0 — — — ICI1 ICI0 ICOV ICBNE ICM2 ICM1 ICM0 0000
IC1CON2 0142 — — — — — — — IC32 ICTRIG TRIGSTAT — SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000D
IC1BUF 0144 IC1BUF 0000
IC1TMR 0146 IC1TMR xxxx
IC2CON1 0148 —— ICSIDL IC2TSEL2 IC2TSEL1 IC2TSEL0 — — — ICI1 ICI0 ICOV ICBNE ICM2 ICM1 ICM0 0000
IC2CON2 014A — — — — — — — IC32 ICTRIG TRIGSTAT — SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000D
IC2BUF 014C IC2BUF 0000
IC2TMR 014E IC2TMR xxxx
IC3CON1 0150 —— ICSIDL IC3TSEL2 IC3TSEL1 IC3TSEL0 — — — ICI1 ICI0 ICOV ICBNE ICM2 ICM1 ICM0 0000
IC3CON2 0152 — — — — — — — IC32 ICTRIG TRIGSTAT — SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0 000D
IC3BUF 0154 IC3BUF 0000
IC3TMR 0156 IC3TMR xxxx
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
PIC24FV32KA304 FAMILY
DS39995C-page 43 2011-2012 Microchip Technology Inc.
TABLE 4-8: OUTPUT COMPARE REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 1 1 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
OC1CON1 0190 —— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2 ENFLT1 ENFLT0 OCFLT2 OCFLT1 OCFLT0 TRIGMODE OCM2 OCM1 OCM0
0000
OC1CON2 0192 FLTMD FLTOUT FLTTRIEN OCINV — DCB1 DCB0 OC32 OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000C
OC1RS 0194 OC1RS
0000
OC1R 0196 OC1R
0000
OC1TMR 0198 OC1TMR
xxxx
OC2CON1 019A —— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2 ENFLT1 ENFLT0 OCFLT2 OCFLT1 OCFLT0 TRIGMODE OCM2 OCM1 OCM0
0000
OC2CON2 019C FLTMD FLTOUT FLTTRIEN OCINV — DCB1 DCB0 OC32 OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000C
OC2RS 019E OC2RS
0000
OC2R 01A0 OC2R
0000
OC2TMR 01A2 OC2TMR
xxxx
OC3CON1 01A4 —— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2 ENFLT1 ENFLT0 OCFLT2 OCFLT1 OCFLT0 TRIGMODE OCM2 OCM1 OCM0
0000
OC3CON2 01A6 FLTMD FLTOUT FLTTRIEN OCINV — DCB1 DCB0 OC32 OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
000C
OC3RS 01A8 OC3RS
0000
OC3R 01AA OC3R
0000
OC3TMR 01AC OC3TMR
xxxx
Legend:
— = unimplemented, read as ‘
0
’. Reset values are shown in hexadecimal.
2011-2012 Microchip Technology Inc. DS39995C-page 44
PIC24FV32KA304 FAMILY
TABLE 4-9: I2Cx REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 1 1 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
I2C1RCV 0200 — — — — — — — — I2CRCV 0000
I2C1TRN 0202 — — — — — — — —I2CTRN00FF
I2C1BRG 0204 — — — — — — — —I2CBRG0000
I2C1CON 0206 I2CEN — I2CSIDL SCLREL IPMIEN A10M DISSLW SMEN GCEN STREN ACKDT ACKEN RCEN PEN RSEN SEN 1000
I2C1STAT 0208 ACKSTAT TRSTAT — — — BCL GCSTAT ADD10 IWCOL I2COV D/A PSR/WRBF TBF 0000
I2C1ADD 020A — — — — — —I2CADD0000
I2C1MSK 020C — — — — — — AMSK9 AMSK8 AMSK7 AMSK6 AMSK5 AMSK4 AMSK3 AMSK2 AMSK1 AMSK0 0000
I2C2RCV 0210 — — — — — — — — I2CRCV 0000
I2C2TRN 0212 — — — — — — — —I2CTRN00FF
I2C2BRG 0214 — — — — — — — —I2CBRG0000
I2C2CON 0216 I2CEN — I2CSIDL SCLREL IPMIEN A10M DISSLW SMEN GCEN STREN ACKDT ACKEN RCEN PEN RSEN SEN 1000
I2C2STAT 0218 ACKSTAT TRSTAT — — — BCL GCSTAT ADD10 IWCOL I2COV D/A PSR/WRBF TBF 0000
I2C2ADD 021A — — — — — —I2CADD0000
I2C2MSK 021C — — — — — — AMSK9 AMSK8 AMSK7 AMSK6 AMSK5 AMSK4 AMSK3 AMSK2 AMSK1 AMSK0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-10: UARTx REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 1 1 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
U1MODE 0220 UARTEN — USIDL IREN RTSMD — UEN1 UEN0 WAKE LPBACK ABAUD RXINV BRGH PDSEL1 PDSEL0 STSEL 0000
U1STA 0222 UTXISEL1 UTXINV UTXISEL0 — UTXBRK UTXEN UTXBF TRMT URXISEL1 URXISEL0 ADDEN RIDLE PERR FERR OERR URXDA 0110
U1TXREG 0224 — — — — — — —U1TXREGxxxx
U1RXREG 0226 — — — — — — —U1RXREG0000
U1BRG 0228 BRG 0000
U2MODE 0230 UARTEN — USIDL IREN RTSMD — UEN1 UEN0 WAKE LPBACK ABAUD RXINV BRGH PDSEL1 PDSEL0 STSEL 0000
U2STA 0232 UTXISEL1 UTXINV UTXISEL0 — UTXBRK UTXEN UTXBF TRMT URXISEL1 URXISEL0 ADDEN RIDLE PERR FERR OERR URXDA 0110
U2TXREG 0234 — — — — — — —U2TXREGxxxx
U2RXREG 0236 — — — — — — —U2RXREG0000
U2BRG 0238 BRG 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
PIC24FV32KA304 FAMILY
DS39995C-page 45 2011-2012 Microchip Technology Inc.
TABLE 4-11: SPIx REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 1 1 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
SPI1STAT 0240 SPIEN — SPISIDL —— SPIBEC2 SPIBEC1 SPIBEC0 SRMPT SPIROV SR1MPT SISEL2 SISEL1 SISEL0 SPITBF SPIRBF 0000
SPI1CON1 0242 — — — DISSCK DISSDO MODE16 SMP CKE SSEN CKP MSTEN SPRE2 SPRE1 SPRE0 PPRE1 PPRE0 0000
SPI1CON2 0244 FRMEN SPIFSD SPIFPOL — — — — — — — — — — — SPIFE SPIBEN 0000
SPI1BUF 0248 SPI1BUF 0000
SPI2STAT 0260 SPIEN — SPISIDL —— SPIBEC2 SPIBEC1 SPIBEC0 SRMPT SPIROV SRXMPT SISEL2 SISEL1 SISEL0 SPITBF SPIRBF 0000
SPI2CON1 0262 — — — DISSCK DISSDO MODE16 SMP CKE SSEN CKP MSTEN SPRE2 SPRE1 SPRE0 PPRE1 PPRE0 0000
SPI2CON2 0264 FRMEN SPIFSD SPIFPOL — — — — — — — — — — — SPIFE SPIBEN 0000
SPI2BUF 0268 SPI2BUF 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-12: PORTA REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11(2,3)Bit 10(2,3)Bit 9(2,3)Bit 8(2,3)Bit 7(2)Bit 6(4)Bit 5(1)Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
TRISA 02C0 ———— TRISA11 TRISA10 TRISA9 TRISA8 TRISA7 TRISA6 — TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 00DF
PORTA 02C2 ———— RA11 RA10 RA9 RA8 RA7 RA6 RA5 RA4 RA3 RA2 RA1 RA0 xxxx
LATA 02C4 ———— LATA11 LATA10 LATA9 LATA8 LATA7 LATA6 — LATA4 LATA3 LATA2 LATA1 LATA0 xxxx
ODCA 02C6 ———— ODA11 ODA10 ODA9 ODA8 ODA7 ODA6 — ODA4 ODA3 ODA2 ODA1 ODA0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: This bit is available only when MCLRE = 1.
2: These bits are not implemented in 20-pin devices.
3: These bits are not implemented in 28-pin devices.
4: These bits are not implemented in FV devices.
TABLE 4-13: PORTB REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 (1)Bit 10(1)Bit 9 Bit 8 Bit 7 Bit 6(1)Bit 5(1)Bit 4 Bit 3(1)Bit 2 Bit 1 Bit 0 All
Resets
TRISB 02C8 TRISB15 TRISB14 TRISB13 TRISB12 TRISB11 TRISB10 TRISB9 TRISB8 TRISB7 TRISB6 TRISB5 TRISB4 TRISB3 TRISB2 TRISB1 TRISB0 FFFF
PORTB 02CA RB15 RB14 RB13 RB12 RB11 RB10 RB9 RB8 RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0 xxxx
LATB 02CC LATB15 LATB14 LATB13 LATB12 LATB11 LATB10 LATB9 LATB8 LATB7 LATB6 LATB5 LATB4 LATB3 LATB2 LATB1 LATB0 xxxx
ODCB 02CE ODB15 ODB14 ODB13 ODB12 ODB11 ODB10 ODB9 ODB8 ODB7 ODB6 ODB5 ODB4 ODB3 ODB2 ODB1 ODB0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: These bits are not implemented in 20-pin devices.
2011-2012 Microchip Technology Inc. DS39995C-page 46
PIC24FV32KA304 FAMILY
TABLE 4-14: PORTC REGISTER MAP(1)
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
TRISC 02D0 — — — — — — TRISC9 TRISC8 TRISC7 TRISC6 TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0 03FF
PORTC 02D2 — — — — — — RC9 RC8 RC7 RC6 RC5 RC4 RC3 RC2 RC1 RC0 xxxx
LATC 02D4 — — — — — — LATC9 LATC8 LATC7 LATC6 LATC5 LATC4 LATC3 LATC2 LATC1 LATC0 xxxx
ODCC 02D6 — — — — — — ODC9 ODC8 ODC7 ODC6 ODC5 ODC4 ODC3 ODC2 ODC1 ODC0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: PORTC is not implemented in 20-pin devices or 28-pin devices.
TABLE 4-15: PAD CONFIGURATION REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All Reset s
PADCFG1 02FC — — — — — — — — — — SMBUSDEL2 SMBUSDEL1 — — — — 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
PIC24FV32KA304 FAMILY
DS39995C-page 47 2011-2012 Microchip Technology Inc.
TABLE 4-16: A/D REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
ADC1BUF0 0300 ADC1BUF0 xxxx
ADC1BUF1 0302 ADC1BUF1 xxxx
ADC1BUF2 0304 ADC1BUF2 xxxx
ADC1BUF3 0306 ADC1BUF3 xxxx
ADC1BUF4 0308 ADC1BUF4 xxxx
ADC1BUF5 030A ADC1BUF5 xxxx
ADC1BUF6 030C ADC1BUF6 xxxx
ADC1BUF7 030E ADC1BUF7 xxxx
ADC1BUF8 0310 ADC1BUF8 xxxx
ADC1BUF9 0312 ADC1BUF9 xxxx
ADC1BUF10 0314 ADC1BUF10 xxxx
ADC1BUF11 0316 ADC1BUF11 xxxx
ADC1BUF12 0318 ADC1BUF12 xxxx
ADC1BUF13 031A ADC1BUF13 xxxx
ADC1BUF14 031C ADC1BUF14 xxxx
ADC1BUF15 031E ADC1BUF15 xxxx
ADC1BUF16 0320 ADC1BUF16 xxxx
ADC1BUF17 0322 ADC1BUF17 xxxx
AD1CON1 0340 ADON —ADSIDL—— MODE12 FORM1 FORM0 SSRC3 SSRC2 SSRC1 SSRC0 — ASAM SAMP DONE 0000
AD1CON2 0342 PVCFG1 PVCFG0 NVCFG0 OFFCAL BUFREGEN CSCNA —— BUFS SMPI4 SMPI3 SMPI2 SMPI1 SMPI0 BUFM ALTS 0000
AD1CON3 0344 ADRC EXTSAM — SAMC4 SAMC3 SAMC2 SAMC1 SAMC0 ADCS7 ADCS6 ADCS5 ADCS4 ADCS3 ADCS2 ADCS1 ADCS0 0000
AD1CHS 0348 CH0NB2 CH0NB1 CH0NB0 CH0SB4 CH0SB3 CH0SB2 CH0SB1 CH0SB0 CH0NA2 CH0NA1 CH0NA0 CH0SA4 CH0SA3 CH0SA2 CH0SA1 CH0SA0 0000
AD1CSSH 034E — CSSL30 CSSL29 CSSL28 CSSL27 CSSL26 — — — — — — — — CSSL17 CSSL16 0000
AD1CSSL 0350 CSSL15 CSSL14 CSSL13 CSSL12 CSSL11 CSSL10 CSSL9 CSSL8 CSSL7 CSSL6 CSSL5 CSSL4 CSSL3 CSSL2 CSSL1 CSSL0 0000
AD1CON5 0354 ASEN LPEN CTMUREQ BGREQ r— ASINT1 ASINT0 — — — —WM1WM0CM1CM00000
AD1CHITH 0356 — — — — — — — — — — — — — — CHH17 CHH16 0000
AD1CHITL 0358 CHH15 CHH14 CHH13 CHH12 CHH11 CHH10 CHH9 CHH8 CHH7 CHH6 CHH5 CHH4 CHH3 CHH2 CHH1 CHH0 0000
Legend: — = unimplemented, read as ‘0’; r = reserved. Reset values are shown in hexadecimal.
2011-2012 Microchip Technology Inc. DS39995C-page 48
PIC24FV32KA304 FAMILY
TABLE 4-17: CTMU REGISTER MAP
File N ame Addr Bit 15 Bit 14 Bit 1 3 Bit 12 Bit 11 Bit 1 0 Bit 9 Bit 8 Bit 7 B it 6 Bit 5 Bi t 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
CTMUCON1 035A CTMUEN — CTMUSIDL TGEN EDGEN EDGSEQEN IDISSEN CTTRIG — — — — — — — —
0000
CTMUCON2 035C EDG1EDGE EDG1POL EDG1SEL3 EDG1SEL2 EDG1SEL1 EDG1SEL0 EDG2 EDG1 EDG2EDGE EDG2POL EDG2SEL3 EDG2SEL2 EDG2SEL1 EDG2SEL0 — —
0000
CTMUICON 035E ITRIM5 ITRIM4 ITRIM3 ITRIM2 ITRIM1 ITRIM0 IRNG1 IRNG0 — — — — — — — —
0000
AD1CTMUENH 0360 — — — — — — — — — — — — — — CTMEN17 CTMEN16
0000
AD1CTMUENL 0362 CTMEN15 CTMEN14 CTMEN13 CTMEN12 CTMEN11 CTMEN10 CTMEN9 CTMEN8 CTMEN7 CTMEN6 CTMEN5 CTMEN4 CTMEN3 CTMEN2 CTMEN1 CTMEN0
0000
Legend:
— = unimplemented, read as ‘
0
’. Reset values are shown in hexadecimal.
TABLE 4-18: ANALOG SELECT REGISTER MAP
File Na me Addr Bit 15 Bit 14 Bit 1 3 Bit 12 Bi t 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bi t 3 Bit 2 Bit 1 Bit 0 All
Resets
ANSA 04E0 — — — — — — — — — — — — ANSA3 ANSA2 ANSA1 ANSA0 000F
ANSB 04E2 ANSB15 ANSB14 ANSB13 ANSB12 — — — — — — — ANSB4 ANSB3(1)ANSB2 ANSB1 ANSB0 F01F
ANSC 04E4 — — — — — — — — — — — — — ANSC2(1,2)ANSC1(1,2)ANSC0(1,2)0007
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: These bits are not implemented in 20-pin devices.
2: These bits are not implemented in 28-pin devices.
TABLE 4-19: REAL-TIME CLOCK AND CALENDAR REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 1 1 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
ALRMVAL 0620 ALRMVAL xxxx
ALCFGRPT 0622 ALRMEN CHIME AMASK3 AMASK2 AMASK1 AMASK0 ALRMPTR1 ALRMPTR0 ARPT7 ARPT6 ARPT5 ARPT4 ARPT3 ARPT2 ARPT1 ARPT0 0000
RTCVAL 0624 RTCVAL xxxx
RCFGCAL 0626 RTCEN — RTCWREN RTCSYNC HALFSEC RTCOE RTCPTR1 RTCPTR0 CAL7 CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0 0000
RTCPWC 0628 PWCEN PWCPOL PWCCPRE PWCSPRE RTCCLK1 RTCCLK0 RTCOUT1 RTCOUT0 — — — — — — — — xxxx
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-20: TRIPLE COMPARATOR REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
CMSTAT 0630 CMIDL — — — — C3EVT C2EVT C1EVT — — — — — C3OUT C2OUT C1OUT xxxx
CVRCON 0632 — — — — — — — — CVREN CVROE CVRSS CVR4 CVR3 CVR2 CVR1 CVR0 0000
CM1CON 0634 CON COE CPOL CLPWR —— CEVT COUT EVPOL1 EVPOL0 — CREF —— CCH1 CCH0 xxxx
CM2CON 0636 CON COE CPOL CLPWR —— CEVT COUT EVPOL1 EVPOL0 — CREF —— CCH1 CCH0 0000
CM3CON 0638 CON COE CPOL CLPWR —— CEVT COUT EVPOL1 EVPOL0 — CREF —— CCH1 CCH0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
PIC24FV32KA304 FAMILY
DS39995C-page 49 2011-2012 Microchip Technology Inc.
TABLE 4-21: CRC REGISTER MAP
File
Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
CRCCON1 0640 CRCEN — CSIDL VWORD4 VWORD3 VWORD2 VWORD1 VWORD0 CRCFUL CRCMPT CRCISEL CRCGO LENDIAN — — — 0000
CRCCON2 0642 — — — DWIDTH4 DWIDTH3 DWIDTH2 DWIDTH1 DWIDTH0 — — — PLEN4 PLEN3 PLEN2 PLEN1 PLEN0 0000
CRCXORL 0644 X15 X14 X13 X12 X11 X10 X9 X8 X7 X6 X5 X4 X3 X2 X1 —0000
CRCXORH 0646 X31 X30 X29 X28 X27 X26 X25 X24 X23 X22 X21 X20 X19 X18 X17 X16 0000
CRCDATL 0648 CRCDATL xxxx
CRCDATH 064A CRCDATH xxxx
CRCWDATL 064C CRCWDATL xxxx
CRCWDATH 064E CRCWDATH xxxx
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-22: CLOCK CONTROL REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
RCON 0740 TRAPR IOPUWR SBOREN LVREN — DPSLP CM PMSLP EXTR SWR SWDTEN WDTO SLEEP IDLE BOR POR (Note 1)
OSCCON 0742 — COSC2 COSC1 COSC0 — NOSC2 NOSC1 NOSC0 CLKLOCK —LOCK — CF SOSCDRV SOSCEN OSWEN (Note 2)
CLKDIV 0744 ROI DOZE2 DOZE1 DOZE0 DOZEN RCDIV2 RCDIV1 RCDIV0 — — — — — — — — 3140
OSCTUN 0748 — — — — — — — — — — TUN5 TUN4 TUN3 TUN2 TUN1 TUN0 0000
REFOCON 074E ROEN — ROSSLP ROSEL RODIV3 RODIV2 RODIV1 RODIV0 — — — — — — — — 0000
HLVDCON 0756 HLVDEN —HLSIDL— — — — — VDIR BGVST IRVST — HLVDL3 HLVDL2 HLVDL1 HLVDL0 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: RCON register Reset values are dependent on the type of Reset.
2: OSCCON register Reset values are dependent on the configuration fuses and by type of Reset.
TABLE 4-23: DEEP SLEEP REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
DSCON 0758 DSEN — — — — — — RTCCWDIS — — — — ULPWDIS DSBOR RELEASE 0000
DSWAKE 075A — — — — — — — DSINT0 DSFLT —— DSWDT DSRTCC DSMCLR — DSPOR 0000
DSGPR0(1)075C DSGPR0 0000
DSGPR1(1)075E DSGPR1 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: The Deep Sleep registers, DSGPR0 and DSGPR1, are only reset on a VDD POR event.
2011-2012 Microchip Technology Inc. DS39995C-page 50
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TABLE 4-24: NVM REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets(1)
NVMCON 0760 WR WREN WRERR PGMONLY — — — — — ERASE NVMOP5 NVMOP4 NVMOP3 NVMOP2 NVMOP1 NVMOP0 0000
NVMKEY 0766 — — — — — — — —NVMKEY0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
Note 1: Reset value shown is for POR only. The value on other Reset states is dependent on the state of memory write or erase operations at the time of Reset.
TABLE 4-25: ULTRA LOW-POWER WAKE-UP REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All
Resets
ULPWCON 0768 ULPEN —ULPSIDL— — — — ULPSINK — — — — — — — — 0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
TABLE 4-26: PMD REGISTER MAP
File Name Addr Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 All Resets
PMD1 0770 T5MD T4MD T3MD T2MD T1MD — — — I2C1MD U2MD U1MD SPI2MD SPI1MD —— ADC1MD 0000
PMD2 0772 — — — — — IC3MD IC2MD IC1MD — — — — — OC3MD OC2MD OC1MD 0000
PMD3 0774 — — — — — CMPMD RTCCMD — CRCPMD — — — — —I2C2MD—0000
PMD4 0776 — — — — — — — —ULPWUMD —— EEMD REFOMD CTMUMD HLVDMD —0000
Legend: — = unimplemented, read as ‘0’. Reset values are shown in hexadecimal.
PIC24FV32KA304 FAMILY
DS39995C-page 51 2011-2012 Microchip Technology Inc.
4.2.5 SOFTWARE STACK
In addition to its use as a working register, the W15
register in PIC24F devices is also used as a Software
Stack Pointer. The pointer always points to the first
available free word and grows from lower to higher
addresses. It predecrements for stack pops and
post-increments for stack pushes, as shown in
Figure 4-4.
Note that for a PC push during any CALL instruction,
the MSB of the PC is zero-extended before the push,
ensuring that the MSB is always clear.
The Stack Pointer Limit Value (SPLIM) register,
associated with the Stack Pointer, sets an upper
address boundary for the stack. SPLIM is uninitialized
at Reset. As is the case for the Stack Pointer,
SPLIM<0> is forced to ‘0’ as all stack operations must
be word-aligned. Whenever an EA is generated, using
W15 as a source or destination pointer, the resulting
address is compared with the value in SPLIM. If the
contents of the Stack Pointer (W15) and the SPLIM
register are equal, and a push operation is performed,
a stack error trap will not occur. The stack error trap will
occur on a subsequent push operation.
Thus, for example, if it is desirable to cause a stack
error trap when the stack grows beyond address, 0DF6
in RAM, initialize the SPLIM with the value, 0DF4.
Similarly, a Stack Pointer underflow (stack error) trap is
generated when the Stack Pointer address is found to
be less than 0800h. This prevents the stack from
interfering with the Special Function Register (SFR)
space.
FIGURE 4-4: CALL STACK FRAME
4.3 Interfaci ng Program and Data
Memory Spaces
The PIC24F architecture uses a 24-bit wide program
space and 16-bit wide data space. The architecture is
also a modified Harvard scheme, meaning that data
can also be present in the program space. To use this
data successfully, it must be accessed in a way that
preserves the alignment of information in both spaces.
Apart from the normal execution, the PIC24F
architecture provides two methods by which the
program space can be accessed during operation:
• Using table instructions to access individual bytes
or words anywhere in the program space
• Remapping a portion of the program space into
the data space, PSV
Table instructions allow an application to read or write
small areas of the program memory. This makes the
method ideal for accessing data tables that need to be
updated from time to time. It also allows access to all
bytes of the program word. The remapping method
allows an application to access a large block of data on
a read-only basis, which is ideal for look-ups from a
large table of static data. It can only access the least
significant word (lsw) of the program word.
4.3.1 ADDRESSING PROGRAM SPACE
Since the address ranges for the data and program
spaces are 16 and 24 bits, respectively, a method is
needed to create a 23-bit or 24-bit program address
from 16-bit data registers. The solution depends on the
interface method to be used.
For table operations, the 8-bit Table Memory Page
Address register (TBLPAG) is used to define a 32K word
region within the program space. This is concatenated
with a 16-bit EA to arrive at a full 24-bit program space
address. In this format, the Most Significant bit (MSb) of
TBLPAG is used to determine if the operation occurs in
the user memory (TBLPAG<7> = 0) or the configuration
memory (TBLPAG<7> = 1).
For remapping operations, the 8-bit Program Space
Visibility Page Address register (PSVPAG) is used to
define a 16K word page in the program space. When
the MSb of the EA is ‘1’, PSVPAG is concatenated with
the lower 15 bits of the EA to form a 23-bit program
space address. Unlike the table operations, this limits
remapping operations strictly to the user memory area.
Table 4-27 and Figure 4-5 show how the program EA is
created for table operations and remapping accesses
from the data EA. Here, the P<23:0> bits refer to a pro-
gram space word, whereas the D<15:0> bits refer to a
data space word.
Note: A PC push during exception processing
will concatenate the SRL register to the
MSB of the PC prior to the push.
Note: A write to the SPLIM register should not
be immediately followed by an indirect
read operation using W15.
<Free Word>
PC<15:0>
000000000
015
W15 (before CALL)
W15 (after CALL)
Stack Grows Towards
Higher Address
0000h
PC<22:16>
POP : [--W15]
PUSH : [W15++]
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TABLE 4-27: PROGRAM SPACE ADDRESS CONSTRUCTION
FIGURE 4-5: DATA ACCESS FROM PROGRAM SPACE ADDRESS GENERATION
Access Type Access
Space Program Spa ce Address
<23> <22:16> <15> <14:1> <0>
Instruction Access
(Code Execution)
User 0PC<22:1> 0
0xx xxxx xxxx xxxx xxxx xxx0
TBLRD/TBLWT
(Byte/Word Read/Write)
User TBLPAG<7:0> Data EA<15:0>
0xxx xxxx xxxx xxxx xxxx xxxx
Configuration TBLPAG<7:0> Data EA<15:0>
1xxx xxxx xxxx xxxx xxxx xxxx
Program Space Visibility
(Block Remap/Read)
User 0PSVPAG<7:0>(2)Data EA<14:0>(1)
0 xxxx xxxx xxx xxxx xxxx xxxx
Note 1: Data EA<15> is always ‘1’ in this case, but is not used in calculating the program space address. Bit 15 of
the address is PSVPAG<0>.
2: PSVPAG can have only two values (‘00’ to access program memory and FF to access data EEPROM) in
the PIC24FV32KA304 family.
0
Program Counter
23 Bits
1
PSVPAG
8 Bits
EA
15 Bits
Program Counter(1)
Select
TBLPAG
8 Bits
EA
16 Bits
Byte Select
0
0
1/0
User/Configuration
Table Operations(2)
Program Space Visibility(1)
Space Select
24 Bits
23 Bits
(Remapping)
1/0
0
Note 1: The LSb of program space addresses is always fixed as ‘0’ in order to maintain word alignment of data in the
program and data spaces.
2: Table operations are not required to be word-aligned. Table read operations are permitted in the configuration
memory space.
PIC24FV32KA304 FAMILY
DS39995C-page 53 2011-2012 Microchip Technology Inc.
4.3.2 DATA ACCESS FROM PROGRAM
MEMORY AND DATA EEPROM
MEMORY USING TABLE
INSTRUCTIONS
The TBLRDL and TBLWTL instructions offer a direct
method of reading or writing the lower word of any
address within the program memory without going
through data space. It also offers a direct method of
reading or writing a word of any address within data
EEPROM memory. The TBLRDH and TBLWTH
instructions are the only method to read or write the
upper 8 bits of a program space word as data.
The PC is incremented by two for each successive
24-bit program word. This allows program memory
addresses to directly map to data space addresses.
Program memory can thus be regarded as two 16-bit
word-wide address spaces, residing side by side, each
with the same address range. TBLRDL and TBLWTL
access the space which contains the least significant
data word, and TBLRDH and TBLWTH access the space
which contains the upper data byte.
Two table instructions are provided to move byte or
word-sized (16-bit) data to and from program space.
Both function as either byte or word operations.
1. TBLRDL (Table Read Low): In Word mode, it
maps the lower word of the program space
location (P<15:0>) to a data address (D<15:0>).
In Byte mode, either the upper or lower byte of
the lower program word is mapped to the lower
byte of a data address. The upper byte is
selected when byte select is ‘1’; the lower byte
is selected when it is ‘0’.
2. TBLRDH (Table Read High): In Word mode, it
maps the entire upper word of a program address
(P<23:16>) to a data address. Note that
D<15:8>, the ‘phantom’ byte, will always be ‘0’.
In Byte mode, it maps the upper or lower byte of
the program word to D<7:0> of the data
address, as above. Note that the data will
always be ‘0’ when the upper ‘phantom’ byte is
selected (byte select = 1).
Note: The TBLRDH and TBLWTH instructions are
not used while accessing data EEPROM
memory.
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In a similar fashion, two table instructions, TBLWTH
and TBLWTL, are used to write individual bytes or
words to a program space address. The details of
their operation are explained in Section 5.0 “Flash
Progra m Memo r y” .
For all table operations, the area of program memory
space to be accessed is determined by the Table
Memory Page Address register (TBLPAG). TBLPAG
covers the entire program memory space of the
device, including user and configuration spaces. When
TBLPAG<7> = 0, the table page is located in the user
memory space. When TBLPAG<7> = 1, the page is
located in configuration space.
FIGURE 4-6: ACCESSING PROGRAM MEMORY WITH TABLE INSTRUCTIONS
Note: Only table read operations will execute in
the configuration memory space, and only
then, in implemented areas, such as the
Device ID. Table write operations are not
allowed.
081623
00000000
00000000
00000000
00000000
‘Phantom’ Byte
TBLRDH.B (Wn<0> = 0)
TBLRDL.W
TBLRDL.B (Wn<0> = 1)
TBLRDL.B (Wn<0> = 0)
23 15 0
TBLPAG
00
000000h
800000h
002BFEh
Progra m Space
Data EA<15:0>
The address for the table operation is determined by the data EA
within the page defined by the TBLPAG register. Only read
operations are provided; write operations are also valid in the
user memory area.
2011-2012 Microchip Technology Inc. DS39995C-page 55
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4.3.3 READING DATA FROM PROGRAM
MEMORY USING PROGRAM SPACE
VISIBILITY
The upper 32 Kbytes of data space may optionally be
mapped into a 16K word page (in PIC24FV16KA3XX
devices) and a 32K word page (in PIC24FV32KA3XX
devices) of the program space. This provides
transparent access of stored constant data from the
data space without the need to use special instructions
(i.e., TBLRDL/H).
Program space access through the data space occurs
if the MSb of the data space EA is ‘1’ and PSV is
enabled by setting the PSV bit in the CPU Control
(CORCON<2>) register. The location of the program
memory space to be mapped into the data space is
determined by the Program Space Visibility Page
Address (PSVPAG) register. This 8-bit register defines
any one of 256 possible pages of 16K words in
program space. In effect, PSVPAG functions as the
upper 8 bits of the program memory address, with the
15 bits of the EA functioning as the lower bits.
By incrementing the PC by 2 for each program memory
word, the lower 15 bits of data space addresses directly
map to the lower 15 bits in the corresponding program
space addresses.
Data reads from this area add an additional cycle to the
instruction being executed, since two program memory
fetches are required.
Although each data space address, 8000h and higher,
maps directly into a corresponding program memory
address (see Figure 4-7), only the lower 16 bits of the
24-bit program word are used to contain the data. The
upper 8 bits of any program space location used as data
should be programmed with ‘1111 1111’ or ‘0000
0000’ to force a NOP. This prevents possible issues
should the area of code ever be accidentally executed.
For operations that use PSV and are executed outside a
REPEAT loop, the MOV and MOV.D instructions will require
one instruction cycle in addition to the specified execution
time. All other instructions will require two instruction
cycles in addition to the specified execution time.
For operations that use PSV, which are executed inside
a REPEAT loop, there will be some instances that
require two instruction cycles in addition to the
specified execution time of the instruction:
• Execution in the first iteration
• Execution in the last iteration
• Execution prior to exiting the loop due to an
interrupt
• Execution upon re-entering the loop after an
interrupt is serviced
Any other iteration of the REPEAT loop will allow the
instruction accessing data, using PSV, to execute in a
single cycle.
FIGURE 4-7: PROGRAM SPACE VISIBILITY OPERATION
Note: PSV access is temporarily disabled during
table reads/writes.
23 15 0
PSVPAG
Data SpaceProgram Space
0000h
8000h
FFFFh
00 000000h
800000h
002BFEh
When CORCON<2> = 1 and EA<15> = 1:
PSV Area
The data in the page
designated by
PSVPAG is mapped
into the upper half
of the data memory
space....
Data EA<14:0>
...while the lower 15 bits of
the EA specify an exact
address within the PSV
area. This corresponds
exactly to the same lower
15 bits of the actual
program space address.
PIC24FV32KA304 FAMILY
DS39995C-page 56 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 57
PIC24FV32KA304 FAMILY
5.0 FLASH PROGRAM MEMORY
The PIC24FV32KA304 of devices contains internal
Flash program memory for storing and executing appli-
cation code. The memory is readable, writable and
erasable when operating with VDD over 1.8V.
Flash memory can be programmed in three ways:
• In-Circuit Serial Programming™ (ICSP™)
• Run-Time Self Programming (RTSP)
• Enhanced In-Circuit Serial Programming
(Enhanced ICSP)
ICSP allows a PIC24FV32KA304 device to be serially
programmed while in the end application circuit. This is
simply done with two lines for the programming clock
and programming data (which are named PGECx and
PGEDx, respectively), and three other lines for power
(VDD), ground (VSS) and Master Clear/Program mode
Entry Voltage (MCLR/VPP). This allows customers to
manufacture boards with unprogrammed devices and
then program the microcontroller just before shipping
the product. This also allows the most recent firmware
or custom firmware to be programmed.
Run-Time Self Programming (RTSP) is accomplished
using TBLRD (table read) and TBLWT (table write)
instructions. With RTSP, the user may write program
memory data in blocks of 32 instructions (96 bytes) at
a time, and erase program memory in blocks of 32, 64
and 128 instructions (96,192 and 384 bytes) at a time.
The NVMOP<1:0> (NVMCON<1:0>) bits decide the
erase block size.
5.1 Table Instruct ions and Flash
Programming
Regardless of the method used, Flash memory
programming is done with the table read and write
instructions. These allow direct read and write access to
the program memory space from the data memory while
the device is in normal operating mode. The 24-bit target
address in the program memory is formed using the
TBLPAG<7:0> bits and the Effective Address (EA) from
a W register, specified in the table instruction, as
depicted in Figure 5-1.
The TBLRDL and the TBLWTL instructions are used to
read or write to bits<15:0> of program memory.
TBLRDL and TBLWTL can access program memory in
both Word and Byte modes.
The TBLRDH and TBLWTH instructions are used to read
or write to bits<23:16> of program memory. TBLRDH
and TBLWTH can also access program memory in Word
or Byte mode.
FIGURE 5-1: ADDRESSING FOR TABLE REGISTERS
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on Flash pro-
gramming, refer to the “PIC24F Family
Reference Manual”, S ection 4. “Program
Memory” (DS39715).
0
Program Counter
24 Bits
Program
TBLPAG Reg
8 Bits
Working Reg EA
16 Bits
Using
Byte
24-Bit EA
0
1/0
Select
Ta b l e
Instruction
Counter
Using
User/Configuration
Space Select
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DS39995C-page 58 2011-2012 Microchip Technology Inc.
5.2 RTSP Operation
The PIC24F Flash program memory array is organized
into rows of 32 instructions or 96 bytes. RTSP allows
the user to erase blocks of 1 row, 2 rows and 4 rows
(32, 64 and 128 instructions) at a time, and to program
one row at a time. It is also possible to program single
words.
The 1-row (96 bytes), 2-row (192 bytes) and 4-row
(384 bytes) erase blocks, and single row write block
(96 bytes) are edge-aligned from the beginning of
program memory.
When data is written to program memory using TBLWT
instructions, the data is not written directly to memory.
Instead, data written using table writes is stored in holding
latches until the programming sequence is executed.
Any number of TBLWT instructions can be executed
and a write will be successfully performed. However,
32 TBLWT instructions are required to write the full row
of memory.
The basic sequence for RTSP programming is to set up
a Table Pointer, then do a series of TBLWT instructions to
load the buffers. Programming is performed by setting
the control bits in the NVMCON register.
Data can be loaded in any order and the holding
registers can be written to multiple times before
performing a write operation. Subsequent writes,
however, will wipe out any previous writes.
All of the table write operations are single-word writes
(two instruction cycles), because only the buffers are
written. A programming cycle is required for
programming each row.
5.3 Enha n c ed In -Cir c u it Seria l
Programming
Enhanced ICSP uses an on-board bootloader, known
as the program executive, to manage the programming
process. Using an SPI data frame format, the program
executive can erase, program and verify program
memory. For more information on Enhanced ICSP, see
the device programming specification.
5.4 Control Registers
There are two SFRs used to read and write the
program Flash memory: NVMCON and NVMKEY.
The NVMCON register (Register 5-1) controls the blocks
that need to be erased, which memory type is to be
programmed and when the programming cycle starts.
NVMKEY is a write-only register that is used for write
protection. To start a programming or erase sequence,
the user must consecutively write 55h and AAh to the
NVMKEY register. For more information, refer to
Section 5.5 “Programming Operations”.
5.5 Programming Operations
A complete programming sequence is necessary for
programming or erasing the internal Flash in RTSP
mode. During a program or erase operation, the
processor stalls (Waits) until the operation is finished.
Setting the WR bit (NVMCON<15>) starts the
operation and the WR bit is automatically cleared when
the operation is finished.
Note: Writing to a location multiple times without
erasing it is not recommended.
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REGISTER 5-1: NVMCON: FLASH ME MORY CONTROL REGISTER
R/SO-0, HC R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0
WR WREN WRERR PGMONLY(4)— — — —
bit 15 bit 8
U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— ERASE NVMOP5(1)NVMOP4(1)NVMOP3(1)NVMOP2(1)NVMOP1(1)NVMOP0(1)
bit 7 bit 0
Legend: SO = Settable Only bit HC = Hardware Clearable bit
-n = Value at POR ‘1’ = Bit is set R = Readable bit W = Writable bit
‘0’ = Bit is cleared x = Bit is unknown U = Unimplemented bit, read as ‘0’
bit 15 WR: Write Control bit
1 = Initiates a Flash memory program or erase operation. The operation is self-timed and the bit is
cleared by hardware once the operation is complete.
0 = Program or erase operation is complete and inactive
bit 14 WREN: Write Enable bit
1 = Enables Flash program/erase operations
0 = Inhibits Flash program/erase operations
bit 13 WRERR: Write Sequence Error Flag bit
1 = An improper program or erase sequence attempt, or termination, has occurred (bit is set automatically
on any set attempt of the WR bit)
0 = The program or erase operation completed normally
bit 12 PGMONLY: Program Only Enable bit(4)
bit 11-7 Unimplemented: Read as ‘0’
bit 6 ERASE: Erase/Program Enable bit
1 = Performs the erase operation specified by NVMOP<5:0> on the next WR command
0 = Performs the program operation specified by NVMOP<5:0> on the next WR command
bit 5-0 NVMOP<5:0>: Programming Operation Command Byte bits(1)
Erase Operations (when ERASE bit is ‘1’):
1010xx = Erase entire boot block (including code-protected boot block)(2)
1001xx = Erase entire memory (including boot block, configuration block, general block)(2)
011010 = Erase 4 rows of Flash memory(3)
011001 = Erase 2 rows of Flash memory(3)
011000 = Erase 1 row of Flash memory(3)
0101xx = Erase entire configuration block (except code protection bits)
0100xx = Erase entire data EEPROM(4)
0011xx = Erase entire general memory block programming operations
0001xx = Write 1 row of Flash memory (when ERASE bit is ‘0’)(3)
Note 1: All other combinations of NVMOP<5:0> are no operation.
2: These values are available in ICSP™ mode only. Refer to the device programming specification.
3: The address in the Table Pointer decides which rows will be erased.
4: This bit is used only while accessing data EEPROM.
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DS39995C-page 60 2011-2012 Microchip Technology Inc.
5.5.1 PROGRAMMING ALGORITHM FOR
FLASH PROGRAM MEMORY
The user can program one row of Flash program
memory at a time by erasing the programmable row.
The general process is as follows:
1. Read a row of program memory (32 instructions)
and store in data RAM.
2. Update the program data in RAM with the
desired new data.
3. Erase a row (see Example 5-1):
a) Set the NVMOPx bits (NVMCON<5:0>) to
‘011000’ to configure for row erase. Set the
ERASE (NVMCON<6>) and WREN
(NVMCON<14>) bits.
b) Write the starting address of the block to be
erased into the TBLPAG and W registers.
c) Write 55h to NVMKEY.
d) Write AAh to NVMKEY.
e) Set the WR bit (NVMCON<15>). The erase
cycle begins and the CPU stalls for the
duration of the erase cycle. When the erase is
done, the WR bit is cleared automatically.
4. Write the first 32 instructions from data RAM into
the program memory buffers (see Example 5-1).
5. Write the program block to Flash memory:
a) Set the NVMOPx bits to ‘011000’ to
configure for row programming. Clear the
ERASE bit and set the WREN bit.
b) Write 55h to NVMKEY.
c) Write AAh to NVMKEY.
d) Set the WR bit. The programming cycle
begins and the CPU stalls for the duration of
the write cycle. When the write to Flash
memory is done, the WR bit is cleared
automatically.
For protection against accidental operations, the write
initiate sequence for NVMKEY must be used to allow
any erase or program operation to proceed. After the
programming command has been executed, the user
must wait for the programming time until programming
is complete. The two instructions following the start of
the programming sequence should be NOPs, as shown
in Example 5-5.
EXAMPLE 5-1: ERASING A PROGRAM MEMORY ROW – ASSEMBLY LANGUAGE CODE
; Set up NVMCON for row erase operation
MOV #0x4058, W0 ;
MOV W0, NVMCON ; Initialize NVMCON
; Init pointer to row to be ERASED
MOV #tblpage(PROG_ADDR), W0 ;
MOV W0, TBLPAG ; Initialize PM Page Boundary SFR
MOV #tbloffset(PROG_ADDR), W0 ; Initialize in-page EA[15:0] pointer
TBLWTL W0, [W0] ; Set base address of erase block
DISI #5 ; Block all interrupts
for next 5 instructions
MOV #0x55, W0
MOV W0, NVMKEY ; Write the 55 key
MOV #0xAA, W1 ;
MOV W1, NVMKEY ; Write the AA key
BSET NVMCON, #WR ; Start the erase sequence
NOP ; Insert two NOPs after the erase
NOP ; command is asserted
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EXAMPLE 5-2: ERASING A PROGRAM MEMORY ROW – ‘C’ LANGUAGE CODE
EXAMPLE 5-3: LOADING THE WRITE BUFFERS – ASSEMBLY LANGUAGE CODE
// C example using MPLAB C30
int __attribute__ ((space(auto_psv))) progAddr = 0x1234; // Global variable located in Pgm Memory
unsigned i nt offset;
//Set up point er to the first memor y location to be wri tten
TBLPAG = _ _builtin_t blpage(&pro gAddr); // Initialize P M Page Boun dary SFR
offset = _ _builtin_t bloffset(&p rogAddr); // Initialize lower word of add ress
__builtin_ tblwtl(off set, 0x0000 ); // Set base add ress of era se block
// with dummy l atch write
NVMCON = 0 x4058; // Initialize N VMCON
asm("DISI #5"); // Block all interrupts for next 5
// instructions
__builtin_ write_NVM( ); // C30 function to p erform unlo ck
// sequence and set WR
; Set up NVMCON for row programming operations
MOV #0x4004, W0 ;
MOV W0, NVMCON ; Initialize NVMCON
; Set up a pointer to the first program memory location to be written
; program memory selected, and writes enabled
MOV #0x0000, W0 ;
MOV W0, TBLPAG ; Initialize PM Page Boundary SFR
MOV #0x6000, W0 ; An example program memory address
; Perform the TBLWT instructions to write the latches
; 0th_program_word
MOV #LOW_WORD_0, W2 ;
MOV #HIGH_BYTE_0, W3 ;
TBLWTL W2, [W0] ; Write PM low word into program latch
TBLWTH W3, [W0++] ; Write PM high byte into program latch
; 1st_program_word
MOV #LOW_WORD_1, W2 ;
MOV #HIGH_BYTE_1, W3 ;
TBLWTL W2, [W0] ; Write PM low word into program latch
TBLWTH W3, [W0++] ; Write PM high byte into program latch
; 2nd_program_word
MOV #LOW_WORD_2, W2 ;
MOV #HIGH_BYTE_2, W3 ;
TBLWTL W2, [W0] ; Write PM low word into program latch
TBLWTH W3, [W0++] ; Write PM high byte into program latch
•
•
•
; 32nd_program_word
MOV #LOW_WORD_31, W2 ;
MOV #HIGH_BYTE_31, W3 ;
TBLWTL W2, [W0] ; Write PM low word into program latch
TBLWTH W3, [W0] ; Write PM high byte into program latch
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DS39995C-page 62 2011-2012 Microchip Technology Inc.
EXAMPLE 5-4: LOADING THE WRITE BUFFERS – ‘C’ LANGUAGE CODE
EXAMPLE 5-5: INITIATIN G A PROGRAMMING SEQUENCE – ASSEMBLY LANGUAGE CODE
EXAMPLE 5-6: INITIATIN G A PROGRAMMI NG SEQUENCE – ‘C’ LANGUAGE CODE
// C example using MPLA B C30
#define NUM _INSTRUCTIO N_PER_ROW 64
int __attribute__ ((space(auto_psv))) progAddr = 0x1234; // Global variable located in Pgm Memory
unsigned in t offset;
unsigned in t i;
unsigned in t progData[ 2*NUM_INST RUCTION_PE R_ROW]; // Buffer of data t o write
//Set up NV MCON for ro w programm ing
NVMCON = 0x 4001; // Initialize NVMCON
//Set up po inter to th e first me mory locat ion to be w ritten
TBLPAG = __ builtin_tbl page(&prog Addr); // Initialize PM Page Bo undary SFR
offset = __ builtin_tbl offset(&pr ogAddr); // Initialize lower word of addres s
//Perform T BLWT instru ctions to write nece ssary numbe r of latch es
for(i=0; i < 2*NUM_INS TRUCTION_P ER_ROW; i+ +)
{ __builtin_ tblwtl(off set, progDa ta[i++]); // Write to ad dress low word
__builtin_ tblwth(off set, progDa ta[i]); // Write to up per byte
offset = o ffset + 2; // Increment a ddress
}
DISI #5 ; Block all interrupts
for next 5 instructions
MOV #0x55, W0
MOV W0, NVMKEY ; Write the 55 key
MOV #0xAA, W1 ;
MOV W1, NVMKEY ; Write the AA key
BSET NVMCON, #WR ; Start the erase sequence
NOP ; 2 NOPs required after setting WR
NOP ;
BTSC NVMCON, #15 ; Wait for the sequence to be completed
BRA $-2 ;
// C example using MPLAB C30
asm("DISI #5"); // Block all interrupts for next 5 instructions
__builtin_write_NVM(); // Perform unlock sequence and set WR
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6.0 DATA EEPROM MEMORY
The data EEPROM memory is a Nonvolatile Memory
(NVM), separate from the program and volatile data
RAM. Data EEPROM memory is based on the same
Flash technology as program memory, and is optimized
for both long retention and a higher number of
erase/write cycles.
The data EEPROM is mapped to the top of the user
program memory space, with the top address at
program memory address, 7FFE00h to 7FFFFFh. The
size of the data EEPROM is 256 words in
PIC24FV32KA304 devices.
The data EEPROM is organized as 16-bit wide
memory. Each word is directly addressable, and is
readable and writable during normal operation over the
entire VDD range.
Unlike the Flash program memory, normal program
execution is not stopped during a data EEPROM
program or erase operation.
The data EEPROM programming operations are
controlled using the three NVM Control registers:
• NVMCON: Nonvolatile Memory Control Register
• NVMKEY: Nonvolatile Memory Key Register
• NVMADR: Nonvolatile Memory Address Register
6.1 NVMCON Register
The NVMCON register (Register 6-1) is also the primary
control register for data EEPROM program/erase
operations. The upper byte contains the control bits
used to start the program or erase cycle, and the flag bit
to indicate if the operation was successfully performed.
The lower byte of NVMCOM configures the type of NVM
operation that will be performed.
6.2 NVMKEY Register
The NVMKEY is a write-only register that is used to
prevent accidental writes or erasures of data EEPROM
locations.
To start any programming or erase sequence, the
following instructions must be executed first, in the
exact order provided:
1. Write 55h to NVMKEY.
2. Write AAh to NVMKEY.
After this sequence, a write will be allowed to the
NVMCON register for one instruction cycle. In most
cases, the user will simply need to set the WR bit in the
NVMCON register to start the program or erase cycle.
Interrupts should be disabled during the unlock
sequence.
The MPLAB® C30 C compiler provides a defined library
procedure (builtin_write_NVM) to perform the
unlock sequence. Example 6-1 illustrates how the
unlock sequence can be performed with in-line
assembly.
EXAMPLE 6-1: DATA EEPROM UNLOCK SEQUENCE
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on
Data EEPROM, refer to the “PIC24F
Family Reference Manual”, Section 5.
“Data EEPROM” (DS39720).
//Disable Interrupts For 5 instructions
asm volatile ("disi #5");
//Issue Unlock Sequence
asm volatile ("mov #0x55, W0 \n"
"mov W0, NVMKEY \n"
"mov #0xAA, W1 \n"
"mov W1, NVMKEY \n");
// Perform Write/Erase operations
asm volatile ("bset NVMCON, #WR \n"
"nop \n"
"nop \n");
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REGISTER 6-1: NVMCON: NONVOLATILE MEMORY CONTROL REGISTER
R/S-0, HC R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0
WR WREN WRERR PGMONLY — — — —
bit 15 bit 8
U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— ERASE NVMOP5 NVMOP4 NVMOP3 NVMOP2 NVMOP1 NVMOP0
bit 7 bit 0
Legend: HC = Hardware Clearable bit U = Unimplemented bit, read as ‘0’
R = Readable bit W = Writable bit S = Settable bit
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 WR: Write Control bit (program or erase)
1 = Initiates a data EEPROM erase or write cycle (can be set, but not cleared in software)
0 = Write cycle is complete (cleared automatically by hardware)
bit 14 WREN: Write Enable bit (erase or program)
1 = Enables an erase or program operation
0 = No operation allowed (device clears this bit on completion of the write/erase operation)
bit 13 WRERR: Flash Error Flag bit
1 = A write operation is prematurely terminated (any MCLR or WDT Reset during programming
operation)
0 = The write operation completed successfully
bit 12 PGMONLY: Program Only Enable bit
1 = Write operation is executed without erasing target address(es) first
0 = Automatic erase-before-write
Write operations are preceded automatically by an erase of the target address(es).
bit 11-7 Unimplemented: Read as ‘0’
bit 6 ERASE: Erase Operation Select bit
1 = Performs an erase operation when WR is set
0 = Performs a write operation when WR is set
bit 5-0 NVMOP<5:0>: Programming Operation Command Byte bits
Erase Operations (when ERASE bit is ‘1’):
011010 = Erase 8 words
011001 = Erase 4 words
011000 = Erase 1 word
0100xx = Erase entire data EEPROM
Programming Operations (when ERASE bit is ‘0’):
0010xx = Write 1 word
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6.3 NVM Address Register
As with Flash program memory, the NVM Address
Registers, NVMADRU and NVMADR, form the 24-bit
Effective Address (EA) of the selected row or word for
data EEPROM operations. The NVMADRU register is
used to hold the upper 8 bits of the EA, while the
NVMADR register is used to hold the lower 16 bits of
the EA. These registers are not mapped into the
Special Function Register (SFR) space; instead, they
directly capture the EA<23:0> of the last table write
instruction that has been executed and selects the data
EEPROM row to erase. Figure 6-1 depicts the program
memory EA that is formed for programming and erase
operations.
Like program memory operations, the Least Significant
bit (LSb) of NVMADR is restricted to even addresses.
This is because any given address in the data EEPROM
space consists of only the lower word of the program
memory width; the upper word, including the uppermost
“phantom byte”, are unavailable. This means that the
LSb of a data EEPROM address will always be ‘0’.
Similarly, the Most Significant bit (MSb) of NVMADRU
is always ‘0’, since all addresses lie in the user program
space.
FIGURE 6-1: DATA EEPROM
ADDRESSING WITH
TBLPAG AND NVM
ADDRESS REGISTERS
6.4 Data EEPROM Operations
The EEPROM block is accessed using table read and
write operations similar to those used for program
memory. The TBLWTH and TBLRDH instructions are not
required for data EEPROM operations since the
memory is only 16 bits wide (data on the lower address
is valid only). The following programming operations
can be performed on the data EEPROM:
• Erase one, four or eight words
• Bulk erase the entire data EEPROM
• Write one word
• Read one word
The library procedures are used in the code examples
detailed in the following sections. General descriptions
of each process are provided for users who are not
using the C30 compiler libraries.
24-Bit PM Address
TBLPAG
NVMADR
W Register EA
7Fh xxxxh
0
0
NVMADRU
Note 1: Unexpected results will be obtained if the
user attempts to read the EEPROM while
a programming or erase operation is
underway.
2: The C30 C compiler includes library
procedures to automatically perform the
table read and table write operations,
manage the Table Pointer and write
buffers, and unlock and initiate memory
write sequences. This eliminates the
need to create assembler macros or time
critical routines in C for each application.
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DS39995C-page 66 2011-2012 Microchip Technology Inc.
6.4.1 ERASE DATA EEPROM
The data EEPROM can be fully erased, or can be
partially erased, at three different sizes: one word, four
words or eight words. The bits, NVMOP<1:0>
(NVMCON<1:0>), decide the number of words to be
erased. To erase partially from the data EEPROM, the
following sequence must be followed:
1. Configure NVMCON to erase the required
number of words: one, four or eight.
2. Load TBLPAG and WREG with the EEPROM
address to be erased.
3. Clear the NVMIF status bit and enable the NVM
interrupt (optional).
4. Write the key sequence to NVMKEY.
5. Set the WR bit to begin the erase cycle.
6. Either poll the WR bit or wait for the NVM
interrupt (NVMIF is set).
A typical erase sequence is provided in Example 6-2.
This example shows how to do a one-word erase.
Similarly, a four-word erase and an eight-word erase
can be done. This example uses C library procedures to
manage the Table Pointer (builtin_tblpage and
builtin_tbloffset) and the Erase Page Pointer
(builtin_tblwtl). The memory unlock sequence
(builtin_write_NVM) also sets the WR bit to initiate
the operation and returns control when complete.
EXAMPLE 6-2: SINGLE-WORD ERASE
int __attribute__ ((space(eedata))) eeData = 0x1234;
/*--------------------------------------------------------------------------------------------
The variable eeData must be a Global variable declared outside of any method
the code following this comment can be written inside the method that will execute the erase
----------------------------------------------------------------------------------------------
*/ unsigned int offset;
// Set up NVMCON to erase one word of data EEPROM
NVMCON = 0x4058;
// Set up a pointer to the EEPROM location to be erased
TBLPAG = __builtin_tblpage(&eeData); // Initialize EE Data page pointer
offset = __builtin_tbloffset(&eeData); // Initizlize lower word of address
__builtin_tblwtl(offset, 0); // Write EEPROM data to write latch
asm volatile ("disi #5"); // Disable Interrupts For 5 Instructions
__builtin_write_NVM(); // Issue Unlock Sequence & Start Write Cycle
while(NVMCONbits.WR=1); // Optional: Poll WR bit to wait for
// write sequence to complete
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6.4.1.1 Data EEPROM Bulk Erase
To erase the entire data EEPROM (bulk erase), the
address registers do not need to be configured
because this operation affects the entire data
EEPROM. The following sequence helps in performing
a bulk erase:
1. Configure NVMCON to Bulk Erase mode.
2. Clear NVMIF status bit and enable NVM
interrupt (optional).
3. Write the key sequence to NVMKEY.
4. Set the WR bit to begin the erase cycle.
5. Either poll the WR bit or wait for the NVM
interrupt (NVMIF is set).
A typical bulk erase sequence is provided in
Example 6-3.
6.4.2 SINGLE-WORD WRITE
To write a single word in the data EEPROM, the
following sequence must be followed:
1. Erase one data EEPROM word (as mentioned in
the previous section) if the PGMONLY bit
(NVMCON<12>) is set to ‘1’.
2. Write the data word into the data EEPROM
latch.
3. Program the data word into the EEPROM:
- Configure the NVMCON register to program one
EEPROM word (NVMCON<5:0> =
0001xx
).
- Clear the NVMIF status bit and enable the NVM
interrupt (optional).
- Write the key sequence to NVMKEY.
- Set the WR bit to begin the erase cycle.
- Either poll the WR bit or wait for the NVM
interrupt (NVMIF is set).
- To get cleared, wait until NVMIF is set.
A typical single-word write sequence is provided in
Example 6-4.
EXAMPLE 6-3: DATA EEPROM BULK ERASE
EXAMPLE 6-4: SINGLE-WORD WRITE TO DATA EEPROM
// Set up NVMCON to bulk erase the data EEPROM
NVMCON = 0x4050;
// Disable Interrupts For 5 Instructions
asm volatile ("disi #5");
// Issue Unlock Sequence and Start Erase Cycle
__builtin_write_NVM();
int __attribut e__ ((spa ce(eedata))) e eData = 0 x1234;
int newData ; / / New data to wri te to EEPRO M
/*---------------------------------------------------------------------------------------------
The variable eeData must be a Global variable declared outside of any method
the code following this comment can be written inside the method that will execute the write
-----------------------------------------------------------------------------------------------
*/ unsigned in t offs et;
// Set up NVMC ON to era se one word of data EE PROM
NVMCON = 0x400 4;
// Set up a po inter to the EEPROM loc ation to be erase d
TBLPAG = __bui ltin_tblp age(&eeData); // Init ialize EE Data page po inter
offset = __bui ltin_tblo ffset(&eeData) ; // I nit izlize l ower word of addr ess
__builtin_tblw tl(offset , newData); // Write E EPROM da ta to wri te latch
asm volatile ( "disi #5" ); // Disable I nterrupts For 5 I nstructio ns
__builtin_writ e_NVM(); // Issue Unl ock Seque nce & Start Wr ite Cycle
while(NVMCONbi ts.WR=1); // Optional: Poll WR bit to wait fo r
// write seq uence to complete
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6.4.3 READING THE DATA EEPROM
To read a word from data EEPROM, the table read
instruction is used. Since the EEPROM array is only
16 bits wide, only the TBLRDL instruction is needed.
The read operation is performed by loading TBLPAG
and WREG with the address of the EEPROM location,
followed by a TBLRDL instruction.
A typical read sequence, using the Table Pointer
management (builtin_tblpage and
builtin_tbloffset) and table read
(builtin_tblrdl) procedures from the C30
compiler library, is provided in Example 6-5.
Program Space Visibility (PSV) can also be used to
read locations in the data EEPROM.
EXAMPLE 6-5: READING THE DATA EEPROM USING THE TBLRD COMMAND
int __attribute__ ((space(eedata))) eeData = 0x1234;
int data; // Data read from EEPROM
/*--------------------------------------------------------------------------------------------
The variable eeData must be a Global variable declared outside of any method
the code following this comment can be written inside the method that will execute the read
----------------------------------------------------------------------------------------------
*/ unsigned int offset;
// Set up a pointer to the EEPROM location to be erased
TBLPAG = __builtin_tblpage(&eeData); // Initialize EE Data page pointer
offset = __builtin_tbloffset(&eeData); // Initizlize lower word of address
data = __builtin_tblrdl(offset); // Write EEPROM data to write latch
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7.0 RESETS
The Reset module combines all Reset sources and
controls the device Master Reset Signal, SYSRST. The
following is a list of device Reset sources:
• POR: Power-on Reset
•MCLR
: Pin Reset
•SWR: RESET Instruction
• WDTR: Watchdog Timer Reset
• BOR: Brown-out Reset
• Low-Power BOR/Deep Sleep BOR
• TRAPR: Trap Conflict Reset
• IOPUWR: Illegal Opcode Reset
• UWR: Uninitialized W Register Reset
A simplified block diagram of the Reset module is
shown in Figure 7-1.
Any active source of Reset will make the SYSRST
signal active. Many registers associated with the CPU
and peripherals are forced to a known Reset state.
Most registers are unaffected by a Reset; their status is
unknown on Power-on Reset (POR) and unchanged by
all other Resets.
All types of device Reset will set a corresponding status
bit in the RCON register to indicate the type of Reset
(see Register 7-1). A Power-on Reset will clear all bits
except for the BOR and POR bits (RCON<1:0>) which
are set. The user may set or clear any bit at any time
during code execution. The RCON bits only serve as
status bits. Setting a particular Reset status bit in
software will not cause a device Reset to occur.
The RCON register also has other bits associated with
the Watchdog Timer (WDT) and device power-saving
states. The function of these bits is discussed in other
sections of this manual.
FIGURE 7-1: RESE T SYSTEM BLOCK DIAGRAM
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on
Resets, refer to the “PIC24F Family
Reference Manual”, Section 40. “Reset
with Programmable Brown-out Reset”
(DS39728).
Note: Refer to the specific peripheral or
Section 3.0 “CPU” of this data sheet for
register Reset states.
Note: The status bits in the RCON register
should be cleared after they are read so
that the next RCON register value after a
device Reset will be meaningful.
MCLR
VDD
VDD
Rise
Detect
POR
Sleep or Idle
Brown-out
Reset
RESET
Instruction
WDT
Module
Glitch Filter
BOR
Trap Conflict
Illegal Opcode
Uninitialized W Register
SYSRST
BOREN<1:0>
00
01
10
11
0
SBOREN
SLEEP
1
Configuration Mismatch
Enable Voltage Regulator
(PIC24FV32KA3XX only)
(RCON<13>)
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DS39995C-page 70 2011-2012 Microchip Technology Inc.
REGISTER 7-1: RCON: RESET CONTROL REGISTER(1)
R/W-0, HS R/W-0, HS R/W-0 R/W-0 U-0 R/C-0, HS R/W-0 R/W-0
TRAPR IOPUWR SBOREN LVREN(3)— DPSLP CM PMSLP
bit 15 bit 8
R/W-0, HS R/W-0, HS R/W-0, HS R/W-0, HS R/W-0, HS R/W-0, HS R/W-1, HS R/W-1, HS
EXTR SWR SWDTEN(2)WDTO SLEEP IDLE BOR POR
bit 7 bit 0
Legend: C = Clearable bit HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 TRAPR: Trap Reset Flag bit
1 = A Trap Conflict Reset has occurred
0 = A Trap Conflict Reset has not occurred
bit 14 IOPUWR: Illegal Opcode or Uninitialized W Access Reset Flag bit
1 = An illegal opcode detection, an illegal address mode or uninitialized W register used as an Address
Pointer caused a Reset
0 = An illegal opcode or uninitialized W Reset has not occurred
bit 13 SBOREN: Software Enable/Disable of BOR bit
1 = BOR is turned on in software
0 = BOR is turned off in software
bit 12 LVREN: Low-Voltage Sleep Mode(3)
1 = Regulated voltage supply provided solely by the Low-Voltage Regulator (LVREG) during Sleep
0 = Regulated voltage supply provided by the main voltage regulator (HVREG) during Sleep
bit 11 Unimplemented: Read as ‘0’
bit 10 DPSLP: Deep Sleep Mode Flag bit
1 = Deep Sleep has occurred
0 = Deep Sleep has not occurred
bit 9 CM: Configuration Word Mismatch Reset Flag bit
1 = A Configuration Word Mismatch Reset has occurred
0 = A Configuration Word Mismatch Reset has not occurred
bit 8 PMSLP: Program Memory Power During Sleep bit
1 = Program memory bias voltage remains powered during Sleep
0 = Program memory bias voltage is powered down during Sleep and the voltage regulator enters
Standby mode
bit 7 EXTR: External Reset (MCLR) Pin bit
1 = A Master Clear (pin) Reset has occurred
0 = A Master Clear (pin) Reset has not occurred
bit 6 SWR: Software Reset (Instruction) Flag bit
1 = A RESET instruction has been executed
0 = A RESET instruction has not been executed
Note 1: All of the Reset status bits may be set or cleared in software. Setting one of these bits in software does not
cause a device Reset.
2: If the FWDTENx Configuration bit is ‘1’ (unprogrammed), the WDT is always enabled regardless of the
SWDTEN bit setting.
3: This is implemented on PIC24FV32KA3XX parts only; not used on PIC24F32KA3XX devices.
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TABLE 7-1: RES ET FLAG BIT OPERATION
bit 5 SWDTEN: Software Enable/Disable of WDT bit(2)
1 = WDT is enabled
0 = WDT is disabled
bit 4 WDTO: Watchdog Timer Time-out Flag bit
1 = WDT time-out has occurred
0 = WDT time-out has not occurred
bit 3 SLEEP: Wake-up from Sleep Flag bit
1 = Device has been in Sleep mode
0 = Device has not been in Sleep mode
bit 2 IDLE: Wake-up from Idle Flag bit
1 = Device has been in Idle mode
0 = Device has not been in Idle mode
bit 1 BOR: Brown-out Reset Flag bit
1 = A Brown-out Reset has occurred (the BOR is also set after a POR)
0 = A Brown-out Reset has not occurred
bit 0 POR: Power-on Reset Flag bit
1 = A Power-up Reset has occurred
0 = A Power-up Reset has not occurred
Flag Bit Setting Event Clearing Event
TRAPR (RCON<15>) Trap Conflict Event POR
IOPUWR (RCON<14>) Illegal Opcode or Uninitialized W Register Access POR
CM (RCON<9>) Configuration Mismatch Reset POR
EXTR (RCON<7>) MCLR Reset POR
SWR (RCON<6>) RESET Instruction POR
WDTO (RCON<4>) WDT Time-out PWRSAV Instruction, POR
SLEEP (RCON<3>) PWRSAV #SLEEP Instruction POR
IDLE (RCON<2>) PWRSAV #IDLE Instruction POR
BOR (RCON<1>) POR, BOR —
POR (RCON<0>) POR —
DPSLP (RCON<10>) PWRSAV #SLEEP instruction with DSCON<DSEN> set POR
Note: All Reset flag bits may be set or cleared by the user software.
REGISTER 7-1: RCON: RESET CONTROL REGISTER(1) (CONTINUED)
Note 1: All of the Reset status bits may be set or cleared in software. Setting one of these bits in software does not
cause a device Reset.
2: If the FWDTENx Configuration bit is ‘1’ (unprogrammed), the WDT is always enabled regardless of the
SWDTEN bit setting.
3: This is implemented on PIC24FV32KA3XX parts only; not used on PIC24F32KA3XX devices.
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DS39995C-page 72 2011-2012 Microchip Technology Inc.
7.1 Clock Source Selection at Reset
If clock switching is enabled, the system clock source at
device Reset is chosen, as shown in Table 7-2. If clock
switching is disabled, the system clock source is always
selected according to the Oscillator Configuration bits.
For more information, see Section 9.0 “Oscillator
Configuration”.
TABLE 7-2: OSCILLATOR SELECTION vs.
TYPE OF RESET (CLOCK
SWITCHING ENAB LED)
7.2 Device Reset Times
The Reset times for various types of device Reset are
summarized in Table 7-3. Note that the system Reset
signal, SYSRST
, is released after the POR and PWRT
delay times expire.
The time at which the device actually begins to execute
code will also depend on the system oscillator delays,
which include the Oscillator Start-up Timer (OST) and
the PLL lock time. The OST and PLL lock times occur
in parallel with the applicable SYSRST delay times.
The FSCM delay determines the time at which the
FSCM begins to monitor the system clock source after
the SYSRST signal is released.
TABLE 7-3: RESET DELAY TIMES FOR VARIOUS DEVICE RESETS
Reset Type Clock Source Determinant
POR FNOSCx Configuration bits
(FNOSC<10:8>)
BOR
MCLR COSCx Control bits
(OSCCON<14:12>)
WDTO
SWR
Reset Ty pe Clock Source SYSRST Delay System Clock
Delay Notes
POR(6)EC TPOR + TPWRT —1, 2
FRC, FRCDIV TPOR + TPWRT TFRC 1, 2, 3
LPRC TPOR + TPWRT TLPRC 1, 2, 3
ECPLL TPOR + TPWRT TLOCK 1, 2, 4
FRCPLL TPOR + TPWRT TFRC + TLOCK 1, 2, 3, 4
XT, HS, SOSC TPOR+ TPWRT TOST 1, 2, 5
XTPLL, HSPLL TPOR + TPWRT TOST + TLOCK 1, 2, 4, 5
BOR EC TPWRT —2
FRC, FRCDIV TPWRT TFRC 2, 3
LPRC TPWRT TLPRC 2, 3
ECPLL TPWRT TLOCK 2, 4
FRCPLL TPWRT TFRC + TLOCK 2, 3, 4
XT, HS, SOSC TPWRT TOST 2, 5
XTPLL, HSPLL TPWRT TFRC + TLOCK 2, 3, 4
All Others Any Clock — — None
Note 1: TPOR = Power-on Reset delay.
2: TPWRT = 64 ms nominal if the Power-up Timer is enabled; otherwise, it is zero.
3: TFRC and TLPRC = RC Oscillator start-up times.
4: TLOCK = PLL lock time.
5: T
OST = Oscillator Start-up Timer (OST). A 10-bit counter waits 1024 oscillator periods before releasing the
oscillator clock to the system.
6: If Two-Speed Start-up is enabled, regardless of the primary oscillator selected, the device starts with
FRC, and in such cases, FRC start-up time is valid.
Note: For detailed operating frequency and timing specifications, see Section 29.0 “Electrical Characteristics”.
2011-2012 Microchip Technology Inc. DS39995C-page 73
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7.2.1 POR AND LONG OSCILLATOR
START-UP TIMES
The oscillator start-up circuitry and its associated delay
timers are not linked to the device Reset delays that
occur at power-up. Some crystal circuits (especially
low-frequency crystals) will have a relatively long
start-up time. Therefore, one or more of the following
conditions is possible after SYSRST is released:
• The oscillator circuit has not begun to oscillate.
• The Oscillator Start-up Timer (OST) has not
expired (if a crystal oscillator is used).
• The PLL has not achieved a lock (if PLL is used).
The device will not begin to execute code until a valid
clock source has been released to the system.
Therefore, the oscillator and PLL start-up delays must
be considered when the Reset delay time must be
known.
7.2.2 FAIL-SAFE CLOCK MONITOR
(FSCM) AND DEVICE RESETS
If the FSCM is enabled, it will begin to monitor the
system clock source when SYSRST is released. If a
valid clock source is not available at this time, the
device will automatically switch to the FRC Oscillator
and the user can switch to the desired crystal oscillator
in the Trap Service Routine (TSR).
7.3 S pecial Function Register Reset
States
Most of the Special Function Registers (SFRs)
associated with the PIC24F CPU and peripherals are
reset to a particular value at a device Reset. The SFRs
are grouped by their peripheral or CPU function and their
Reset values are specified in each section of this manual.
The Reset value for each SFR does not depend on the
type of Reset with the exception of four registers. The
Reset value for the Reset Control register, RCON, will
depend on the type of device Reset. The Reset value for
the Oscillator Control register, OSCCON, will depend on
the type of Reset and the programmed values of the
FNOSCx bits in the Flash Configuration Word
(FOSCSEL<2:0>); see Table 7 - 2. The RCFGCAL and
NVMCON registers are only affected by a POR.
7.4 Deep Sleep BOR (DSBOR)
Deep Sleep BOR is a very low-power BOR circuitry,
used when the device is in Deep Sleep mode. Due to
low current consumption, accuracy may vary.
The DSBOR trip point is around 2.0V. DSBOR is
enabled by configuring DSLPBOR (FDS<6>) = 1.
DSLPBOR will re-arm the POR to ensure the device will
reset if VDD drops below the POR threshold.
7.5 Brown-out Reset (BOR)
The PIC24FV32KA304 family devices implement a
BOR circuit, which provides the user several
configuration and power-saving options. The BOR is
controlled by the BORV<1:0> and BOREN<1:0>
Configuration bits (FPOR<6:5,1:0>). There are a total
of four BOR configurations, which are provided in
Table 7-3.
The BOR threshold is set by the BORV<1:0> bits. If
BOR is enabled (any values of BOREN<1:0>, except
‘00’), any drop of VDD below the set threshold point will
reset the device. The chip will remain in BOR until VDD
rises above the threshold.
If the Power-up Timer is enabled, it will be invoked after
VDD rises above the threshold. Then, it will keep the chip
in Reset for an additional time delay, TPWRT, if VDD
drops below the threshold while the Power-up Timer is
running. The chip goes back into a BOR and the
Power-up Timer will be initialized. Once VDD rises above
the threshold, the Power-up Timer will execute the
additional time delay.
BOR and the Power-up Timer (PWRT) are indepen-
dently configured. Enabling the Brown-out Reset does
not automatically enable the PWRT.
7.5.1 SOFTWARE ENABLED BOR
When BOREN<1:0> = 01, the BOR can be enabled or
disabled by the user in software. This is done with the
control bit, SBOREN (RCON<13>). Setting SBOREN
enables the BOR to function as previously described.
Clearing the SBOREN disables the BOR entirely. The
SBOREN bit operates only in this mode; otherwise, it is
read as ‘0’.
Placing BOR under software control gives the user the
additional flexibility of tailoring the application to its
environment without having to reprogram the device to
change the BOR configuration. It also allows the user
to tailor the incremental current that the BOR
consumes. While the BOR current is typically very
small, it may have some impact in low-power
applications.
Note: Even when the BOR is under software con-
trol, the Brown-out Reset voltage level is
still set by the BORV<1:0> Configuration
bits; it can not be changed in software.
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DS39995C-page 74 2011-2012 Microchip Technology Inc.
7.5.2 DETECTING BOR
When BOR is enabled, the BOR bit (RCON<1>) is
always reset to ‘1’ on any BOR or POR event. This
makes it difficult to determine if a BOR event has
occurred just by reading the state of BOR alone. A
more reliable method is to simultaneously check the
state of both POR and BOR. This assumes that the
POR and BOR bits are reset to ‘0’ in the software
immediately after any POR event. If the BOR bit is ‘1’
while POR is ‘0’, it can be reliably assumed that a BOR
event has occurred.
7.5.3 DISABLING BOR IN SLEEP MODE
When BOREN<1:0> = 10, BOR remains under
hardware control and operates as previously
described. However, whenever the device enters Sleep
mode, BOR is automatically disabled. When the device
returns to any other operating mode, BOR is
automatically re-enabled.
This mode allows for applications to recover from
brown-out situations, while actively executing code
when the device requires BOR protection the most. At
the same time, it saves additional power in Sleep mode
by eliminating the small incremental BOR current.
Note: Even when the device exits from Deep
Sleep mode, both the POR and BOR bits
are set. Note: BOR levels differ depending on device type;
PIC24FV32KA3XX devices are at different
levels than those of PIC24F32KA3XX
devices. See Section 29.0 “Electrical
Characteristics” for BOR voltage levels.
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8.0 INTERRUPT CONTROLLER
The PIC24F interrupt controller reduces the numerous
peripheral interrupt request signals to a single interrupt
request signal to the CPU. It has the following features:
• Up to eight processor exceptions and
software traps
• Seven user-selectable priority levels
• Interrupt Vector Table (IVT) with up to 118 vectors
• Unique vector for each interrupt or exception
source
• Fixed priority within a specified user priority level
• Alternate Interrupt Vector Table (AIVT) for debug
support
• Fixed interrupt entry and return latencies
8.1 Interrupt Vector Table (IVT)
The IVT is shown in Figure 8-1. The IVT resides in the
program memory, starting at location, 000004h. The IVT
contains 126 vectors, consisting of eight non-maskable
trap vectors, plus, up to 118 sources of interrupt. In
general, each interrupt source has its own vector. Each
interrupt vector contains a 24-bit wide address. The
value programmed into each interrupt vector location is
the starting address of the associated Interrupt Service
Routine (ISR).
Interrupt vectors are prioritized in terms of their natural
priority; this is linked to their position in the vector table.
All other things being equal, lower addresses have a
higher natural priority. For example, the interrupt
associated with Vector 0 will take priority over interrupts
at any other vector address.
PIC24FV32KA304 family devices implement
non-maskable traps and unique interrupts; these are
summarized in Ta b l e 8 - 1 and Table 8-2.
8.1.1 ALTERNATE INTERRUPT VECTOR
TABL E (AI V T )
The Alternate Interrupt Vector Table (AIVT) is located
after the IVT, as shown in Figure 8-1. Access to the
AIVT is provided by the ALTIVT control bit
(INTCON2<15>). If the ALTIVT bit is set, all interrupt
and exception processes will use the alternate vectors
instead of the default vectors. The alternate vectors are
organized in the same manner as the default vectors.
The AIVT supports emulation and debugging efforts by
providing a means to switch between an application
and a support environment without requiring the
interrupt vectors to be reprogrammed. This feature also
enables switching between applications for evaluation
of different software algorithms at run-time. If the AIVT
is not needed, the AIVT should be programmed with
the same addresses used in the IVT.
8.2 Reset Sequence
A device Reset is not a true exception, because the
interrupt controller is not involved in the Reset process.
The PIC24F devices clear their registers in response to
a Reset, which forces the Program Counter (PC) to
zero. The microcontroller then begins program
execution at location, 000000h. The user programs a
GOTO instruction at the Reset address, which redirects
the program execution to the appropriate start-up
routine.
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on the
Interrupt Controller, refer to the “PIC24F
Family Reference Manual”, Section 8.
“Interrupts” (DS39707).
Note: Any unimplemented or unused vector
locations in the IVT and AIVT should be
programmed with the address of a default
interrupt handler routine that contains a
RESET instruction.
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DS39995C-page 76 2011-2012 Microchip Technology Inc.
FIGURE 8-1: PIC24F INTERRUPT VECTOR TABLE
Reset – GOTO Instruction 000000h
Reset – GOTO Address 000002h
Reserved 000004h
Oscillator Fail Trap Vector
Address Error Trap Vector
Stack Error Trap Vector
Math Error Trap Vector
Reserved
Reserved
Reserved
Interrupt Vector 0 000014h
Interrupt Vector 1
—
—
—
Interrupt Vector 52 00007Ch
Interrupt Vector 53 00007Eh
Interrupt Vector 54 000080h
—
—
—
Interrupt Vector 116 0000FCh
Interrupt Vector 117 0000FEh
Reserved 000100h
Reserved 000102h
Reserved
Oscillator Fail Trap Vector
Address Error Trap Vector
Stack Error Trap Vector
Math Error Trap Vector
Reserved
Reserved
Reserved
Interrupt Vector 0 000114h
Interrupt Vector 1
—
—
—
Interrupt Vector 52 00017Ch
Interrupt Vector 53 00017Eh
Interrupt Vector 54 000180h
—
—
—
Interrupt Vector 116
Interrupt Vector 117 0001FEh
Start of Code 000200h
Decreasing Natural Order Priority
Interrupt Vector Table (IVT)(1)
Alternate Interrupt Vector Table (AIVT)(1)
Note 1: See Table 8-2 for the interrupt vector list.
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TABLE 8-2: IMPLEMENTED INTERRUPT VECTORS
TABLE 8-1: TRAP VECTOR DETAILS
Vector Number IVT Address AIVT Address Trap Source
0 000004h 000104h Reserved
1 000006h 000106h Oscillator Failure
2 000008h 000108h Address Error
3 00000Ah 00010Ah Stack Error
4 00000Ch 00010Ch Math Error
5 00000Eh 00010Eh Reserved
6 000010h 000110h Reserved
7 000012h 000112h Reserved
Inter rupt Sourc e Vect or Numbe r IVT Address AIVT
Address
Interrupt Bit Locations
Flag Enable Priority
ADC1 Conversion Done 13 00002Eh 00012Eh IFS0<13> IEC0<13> IPC3<6:4>
Comparator Event 18 000038h 000138h IFS1<2> IEC1<2> IPC4<10:8>
CRC Generator 67 00009Ah 00019Ah IFS4<3> IEC4<3> IPC16<14:12>
CTMU 77 0000AEh 0001AEh IFS4<13> IEC4<13> IPC19<6:4>
External Interrupt 0 0 000014h 000114h IFS0<0> IEC0<0> IPC0<2:0>
External Interrupt 1 20 00003Ch 00013Ch IFS1<4> IEC1<4> IPC5<2:0>
External Interrupt 2 29 00004Eh 00014Eh IFS1<13> IEC1<13> IPC7<6:4>
I2C1 Master Event 17 000036h 000136h IFS1<1> IEC1<1> IPC4<6:4>
I2C1 Slave Event 16 000034h 000134h IFS1<0> IEC1<0> IPC4<2:0>
I2C2 Master Event 50 000078h 000178h IFS3<2> IEC3<2> IPC12<10:8>
I2C2 Slave Event 49 000076h 000176h IFS3<1> IEC3<1> IPC12<6:4>
Input Capture 1 1 000016h 000116h IFS0<1> IEC0<1> IPC0<6:4>
Input Capture 2 5 00001Eh 00011Eh IFS0<5> IEC0<5> IPC1<6:4>
Input Capture 3 37 00005Eh 00015Eh IFS2<5> IEC2<5> IPC9<6:4>
Input Change Notification 19 00003Ah 00013Ah IFS1<3> IEC1<3> IPC4<14:12>
HLVD (High/Low-Voltage Detect) 72 0000A4h 0001A4h IFS4<8> IEC4<8> IPC17<2:0>
NVM – NVM Write Complete 15 000032h 000132h IFS0<15> IEC0<15> IPC3<14:12>
Output Compare 1 2 000018h 000118h IFS0<2> IEC0<2> IPC0<10:8>
Output Compare 2 6 000020h 000120h IFS0<6> IEC0<6> IPC1<10:8>
Output Compare 3 25 000046h 000146h IFS1<9> IEC1<9> IPC6<6:4>
Real-Time Clock/Calendar 62 000090h 000190h IFS3<14> IEC3<14> IPC15<10:8>
SPI1 Error 9 000026h 000126h IFS0<9> IEC0<9> IPC2<6:4>
SPI1 Event 10 000028h 000128h IFS0<10> IEC0<10> IPC2<10:8>
SPI2 Error 32 000054h 000154h IFS2<0> IEC2<2> IPC8<2:0>
SPI2 Event 33 000056h 000156h IFS2<1> IEC2<1> IPC8<6:4>
Timer1 3 00001Ah 00011Ah IFS0<3> IEC0<3> IPC0<14:12>
Timer2 7 000022h 000122h IFS0<7> IEC0<7> IPC1<14:12>
Timer3 8 000024h 000124h IFS0<8> IEC0<8> IPC2<2:0>
Timer4 27 00004Ah 00014Ah IFS1<11> IEC1<11> IPC6<14:12>
Timer5 28 00004Ch 00015Ch IFS1<12> IEC1<12> IPC7<2:0>
UART1 Error 65 000096h 000196h IFS4<1> IEC4<1> IPC16<6:4>
UART1 Receiver 11 00002Ah 00012Ah IFS0<11> IEC0<11> IPC2<14:12>
UART1 Transmitter 12 00002Ch 00012Ch IFS0<12> IEC0<12> IPC3<2:0>
UART2 Error 66 000098h 000198h IFS4<2> IEC4<2> IPC16<10:8>
UART2 Receiver 30 000050h 000150h IFS1<14> IEC1<14> IPC7<10:8>
UART2 Transmitter 31 000052h 000152h IFS1<15> IEC1<15> IPC7<14:12>
Ultra Low-Power Wake-up 80 0000B4h 0001B4h IFS5<0> IEC5<0> IPC20<2:0>
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DS39995C-page 78 2011-2012 Microchip Technology Inc.
8.3 Interrupt Control and Status
Registers
The PIC24FV32KA304 family of devices implements a
total of 22 registers for the interrupt controller:
• INTCON1
• INTCON2
• IFS0, IFS1, IFS3 and IFS4
• IEC0, IEC1, IEC3 and IEC4
• IPC0 through IPC5, IPC7 and IPC15 through
IPC19
•INTTREG
Global Interrupt Enable (GIE) control functions are
controlled from INTCON1 and INTCON2. INTCON1
contains the Interrupt Nesting Disable (NSTDIS) bit, as
well as the control and status flags for the processor
trap sources. The INTCON2 register controls the exter-
nal interrupt request signal behavior and the use of the
AIV table.
The IFSx registers maintain all of the interrupt request
flags. Each source of interrupt has a status bit, which is
set by the respective peripherals, or external signal,
and is cleared via software.
The IECx registers maintain all of the interrupt enable
bits. These control bits are used to individually enable
interrupts from the peripherals or external signals.
The IPCx registers are used to set the Interrupt Priority
Level (IPL) for each source of interrupt. Each user
interrupt source can be assigned to one of eight priority
levels.
The INTTREG register contains the associated
interrupt vector number and the new CPU Interrupt
Priority Level, which are latched into the Vector
Number (VECNUM<6:0>) and the Interrupt Level
(ILR<3:0>) bit fields in the INTTREG register. The new
Interrupt Priority Level is the priority of the pending
interrupt.
The interrupt sources are assigned to the IFSx, IECx
and IPCx registers in the same sequence listed in
Table 8-2. For example, the INT0 (External Interrupt 0)
is depicted as having a vector number and a natural
order priority of 0. The INT0IF status bit is found in
IFS0<0>, the INT0IE enable bit in IEC0<0> and the
INT0IP<2:0> priority bits are in the first position of IPC0
(IPC0<2:0>).
Although they are not specifically part of the interrupt
control hardware, two of the CPU Control registers con-
tain bits that control interrupt functionality. The ALU
STATUS Register (SR) contains the IPL<2:0> bits
(SR<7:5>). These indicate the current CPU Interrupt
Priority Level. The user may change the current CPU
Interrupt Priority Level by writing to the IPLx bits.
The CORCON register contains the IPL3 bit, which
together with IPL<2:0>, also indicates the current CPU
Interrupt Priority Level. IPL3 is a read-only bit so that the
trap events cannot be masked by the user’s software.
All Interrupt registers are described in Register 8-1
through Register 8-33, in the following sections.
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REGISTER 8-1: SR: ALU STATUS REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R-0, HSC
— — — — — — — DC(1)
bit 15 bit 8
R/W-0, HSC R/W-0, HSC R/W-0, HSC R-0, HSC R/W-0, HSC R/W-0, HSC R/W-0, HSC R/W-0, HSC
IPL2(2,3)IPL1(2,3)IPL0(2,3)RA(1)N(1)OV(1)Z(1)C(1)
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-9 Unimplemented: Read as ‘0’
bit 7-5 IPL<2:0>: CPU Interrupt Priority Level Status bits(2,3)
111 = CPU Interrupt Priority Level is 7 (15); user interrupts are disabled
110 = CPU Interrupt Priority Level is 6 (14)
101 = CPU Interrupt Priority Level is 5 (13)
100 = CPU Interrupt Priority Level is 4 (12)
011 = CPU Interrupt Priority Level is 3 (11)
010 = CPU Interrupt Priority Level is 2 (10)
001 = CPU Interrupt Priority Level is 1 (9)
000 = CPU Interrupt Priority Level is 0 (8)
Note 1: See Register 3-1 for the description of these bits, which are not dedicated to interrupt control functions.
2: The IPL<2:0> bits are concatenated with the IPL3 bit (CORCON<3>) to form the CPU Interrupt Priority
Level. The value in parentheses indicates the Interrupt Priority Level if IPL3 = 1.
3: The IPLx Status bits are read-only when NSTDIS (INTCON1<15>) = 1.
Note: Bit 8 and bits 4 through 0 are described in Se ction 3. 0 “CPU”.
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REGISTER 8-2: CORCON: CPU CONTROL REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 R/C-0, HSC R/W-0 U-0 U-0
————IPL3
(2)PSV(1)— —
bit 7 bit 0
Legend: C = Clearable bit HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-4 Unimplemented: Read as ‘0’
bit 3 IPL3: CPU Interrupt Priority Level Status bit(2)
1 = CPU Interrupt Priority Level is greater than 7
0 = CPU Interrupt Priority Level is 7 or less
bit 1-0 Unimplemented: Read as ‘0’
Note 1: See Register 3-2 for the description of this bit, which is not dedicated to interrupt control functions.
2: The IPL3 bit is concatenated with the IPL<2:0> bits (SR<7:5>) to form the CPU Interrupt Priority Level.
Note: Bit 2 is described in Section 3.0 “CPU”.
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REGISTER 8-3: INTCON1: INTERRUPT CONTROL REGISTER 1
R/W-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
NSTDIS — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 R/W-0, HS R/W-0, HS R/W-0, HS R/W-0, HS U-0
— — — MATHERR ADDRERR STKERR OSCFAIL —
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 NSTDIS: Interrupt Nesting Disable bit
1 = Interrupt nesting is disabled
0 = Interrupt nesting is enabled
bit 14-5 Unimplemented: Read as ‘0’
bit 4 MATHERR: Arithmetic Error Trap Status bit
1 = Overflow trap has occurred
0 = Overflow trap has not occurred
bit 3 ADDRERR: Address Error Trap Status bit
1 = Address error trap has occurred
0 = Address error trap has not occurred
bit 2 STKERR: Stack Error Trap Status bit
1 = Stack error trap has occurred
0 = Stack error trap has not occurred
bit 1 OSCFAIL: Oscillator Failure Trap Status bit
1 = Oscillator failure trap has occurred
0 = Oscillator failure trap has not occurred
bit 0 Unimplemented: Read as ‘0’
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REGISTER 8-4: INTCON2: INTERRUPT CONTROL REGISTER2
R/W-0 R-0, HSC U-0 U-0 U-0 U-0 U-0 U-0
ALTIVT DISI — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0
— — — — — INT2EP INT1EP INT0EP
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ALTIVT: Enable Alternate Interrupt Vector Table bit
1 = Uses Alternate Interrupt Vector Table (AIVT)
0 = Uses standard (default) Interrupt Vector Table (IVT)
bit 14 DISI: DISI Instruction Status bit
1 = DISI instruction is active
0 = DISI instruction is not active
bit 13-3 Unimplemented: Read as ‘0’
bit 2 INT2EP: External Interrupt 2 Edge Detect Polarity Select bit
1 = Interrupt is on the negative edge
0 = Interrupt is on the positive edge
bit 1 INT1EP: External Interrupt 1 Edge Detect Polarity Select bit
1 = Interrupt is on the negative edge
0 = Interrupt is on the positive edge
bit 0 INT0EP: External Interrupt 0 Edge Detect Polarity Select bit
1 = Interrupt is on the negative edge
0 = Interrupt is on the positive edge
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REGISTER 8-5: IFS0: INTERRUPT FLAG STATUS REGISTER 0
R/W-0, HS U-0 R/W-0, HS R/W-0, HS R/W-0, HS R/W-0, HS R/W-0, HS R/W-0, HS
NVMIF — AD1IF U1TXIF U1RXIF SPI1IF SPF1IF T3IF
bit 15 bit 8
R/W-0, HS R/W-0, HS R/W-0, HS U-0 R/W-0, HS R/W-0, HS R/W-0, HS R/W-0, HS
T2IF OC2IF IC2IF — T1IF OC1IF IC1IF INT0IF
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 NVMIF: NVM Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 14 Unimplemented: Read as ‘0’
bit 13 AD1IF: A/D Conversion Complete Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12 U1TXIF: UART1 Transmitter Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 11 U1RXIF: UART1 Receiver Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 10 SPI1IF: SPI1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 9 SPF1IF: SPI1 Fault Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 8 T3IF: Timer3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 7 T2IF: Timer2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 6 OC2IF: Output Compare Channel 2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 5 IC2IF: Input Capture Channel 2 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 4 Unimplemented: Read as ‘0’
bit 3 T1IF: Timer1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
PIC24FV32KA304 FAMILY
DS39995C-page 84 2011-2012 Microchip Technology Inc.
bit 2 OC1IF: Output Compare Channel 1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1 IC1IF: Input Capture Channel 1 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0 INT0IF: External Interrupt 0 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
REGISTER 8-5: IFS0: INTERRUPT FLAG STATUS REGISTER 0 (CONTINUED)
2011-2012 Microchip Technology Inc. DS39995C-page 85
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REGISTER 8-6: IFS1: INTERRUPT FLAG STATUS REGISTER 1
R/W-0, HS R/W-0, HS R/W-0, HS R/W-0, HS R/W-0, HS U-0 R/W-0, HS U-0
U2TXIF U2RXIF INT2IF T5IF T4IF —OC3IF —
bit 15 bit 8
U-0 U-0 U-0 R/W-0, HS R/W-0, HS R/W-0, HS R/W-0 R/W-0
— — — INT1IF CNIF CMIF MI2C1IF SI2C1IF
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 U2TXIF: UART2 Transmitter Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 14 U2RXIF: UART2 Receiver Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 13 INT2IF: External Interrupt 2 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12 T5IF: Timer5 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 11 T4IF: Timer4 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 10 Unimplemented: Read as ‘0’
bit 9 OC3IF: Output Compare Channel 3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 8-5 Unimplemented: Read as ‘0’
bit 4 INT1IF: External Interrupt 1 Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 3 CNIF: Input Change Notification Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 2 CMIF: Comparator Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1 MI2C1IF: Master I2C1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0 SI2C1IF: Slave I2C1 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
PIC24FV32KA304 FAMILY
DS39995C-page 86 2011-2012 Microchip Technology Inc.
REGISTER 8-7: IFS2: INTERRUPT FLAG STATUS REGISTER 2
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 R/W-0, HS U-0 U-0 U-0 R/W-0, HS R/W-0, HS
—— IC3IF — — — SPI2IF SPF2IF
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-6 Unimplemented: Read as ‘0’
bit 5 IC3IF: Input Capture Channel 3 Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 4-2 Unimplemented: Read as ‘0’
bit 1 SPI2IF: SPI2 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0 SPF2IF: SPI2 Fault Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
2011-2012 Microchip Technology Inc. DS39995C-page 87
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REGISTER 8-8: IFS3: INTERRUPT FLAG STATUS REGISTER 3
U-0 R/W-0, HS U-0 U-0 U-0 U-0 U-0 U-0
—RTCIF— — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-0, HS R/W-0, HS U-0
— — — — —MI2C2IFSI2C2IF—
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14 RTCIF: Real-Time Clock and Calendar Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 13-3 Unimplemented: Read as ‘0’
bit 2 MI2C2IF: Master I2C2 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1 SI2C2IF: Slave I2C2 Event Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0 Unimplemented: Read as ‘0’
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DS39995C-page 88 2011-2012 Microchip Technology Inc.
REGISTER 8-9: IFS4: INTERRUPT FLAG STATUS REGISTER 4
U-0 U-0 R/W-0, HS U-0 U-0 U-0 U-0 R/W-0, HS
——CTMUIF————HLVDIF
bit 15 bit 8
U-0 U-0 U-0 U-0 R/W-0, HS R/W-0, HS R/W-0, HS U-0
———— CRCIF U2ERIF U1ERIF —
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13 CTMUIF: CTMU Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 12-9 Unimplemented: Read as ‘0’
bit 8 HLVDIF: High/Low-Voltage Detect Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 7-4 Unimplemented: Read as ‘0’
bit 3 CRCIF: CRC Generator Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 2 U2ERIF: UART2 Error Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 1 U1ERIF: UART1 Error Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
bit 0 Unimplemented: Read as ‘0’
2011-2012 Microchip Technology Inc. DS39995C-page 89
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REGISTER 8-10: IFS5: INTERRUPT FLAG STATUS REGISTER 5
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0, HS
— — — — — — —ULPWUIF
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-1 Unimplemented: Read as ‘0’
bit 0 ULPWUIF: Ultra Low-Power Wake-up Interrupt Flag Status bit
1 = Interrupt request has occurred
0 = Interrupt request has not occurred
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DS39995C-page 90 2011-2012 Microchip Technology Inc.
REGISTER 8-11: IEC0: INTERRUPT ENABLE CONTROL REGISTER 0
R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
NVMIE — AD1IE U1TXIE U1RXIE SPI1IE SPF1IE T3IE
bit 15 bit 8
R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
T2IE OC2IE IC2IE — T1IE OC1IE IC1IE INT0IE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 NVMIE: NVM Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 14 Unimplemented: Read as ‘0’
bit 13 AD1IE: A/D Conversion Complete Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 12 U1TXIE: UART1 Transmitter Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 11 U1RXIE: UART1 Receiver Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 10 SPI1IE: SPI1 Transfer Complete Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 9 SPF1IE: SPI1 Fault Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 8 T3IE: Timer3 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 7 T2IE: Timer2 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 6 OC2IE: Output Compare Channel 2 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 5 IC2IE: Input Capture Channel 2 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 4 Unimplemented: Read as ‘0’
bit 3 T1IE: Timer1 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 2 OC1IE: Output Compare Channel 1 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
2011-2012 Microchip Technology Inc. DS39995C-page 91
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bit 1 IC1IE: Input Capture Channel 1 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 0 INT0IE: External Interrupt 0 Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
REGISTER 8-11: IEC0: INTERRUPT ENABLE CONTROL REGISTER 0
REGISTER 8-12: IEC1: INTERRUPT ENABLE CONTROL REGISTER 1
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 U-0
U2TXIE U2RXIE INT2IE T5IE T4IE —OC3IE—
bit 15 bit 8
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — INT1IE CNIE CMIE MI2C1IE SI2C1IE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 U2TXIE: UART2 Transmitter Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 14 U2RXIE: UART2 Receiver Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 13 INT2IE: External Interrupt 2 Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 12 T5IE: Timer5 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 11 T4IE: Timer4 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 10 Unimplemented: Read as ‘0’
bit 9 OC3IE: Output Compare 3 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 8-5 Unimplemented: Read as ‘0’
bit 4 INT1IE: External Interrupt 1 Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 3 CNIE: Input Change Notification Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 2 CMIE: Comparator Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
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DS39995C-page 92 2011-2012 Microchip Technology Inc.
bit 1 MI2C1IE: Master I2C1 Event Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 0 SI2C1IE: Slave I2C1 Event Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
REGISTER 8-13: IEC2: INTERRUPT ENABLE CONTROL REGISTER 2
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 R/W-0 U-0 U-0 U-0 R/W-0 R/W-0
—— IC3IE — — — SPI2IE SPF2IE
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-6 Unimplemented: Read as ‘0’
bit 5 IC3IE: Input Capture Channel 3 Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 4-2 Unimplemented: Read as ‘0’
bit 1 SPI2IE: SPI2 Event Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 0 SPF2IE: SPI2 Fault Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
REGISTER 8-12: IEC1: INTERRUPT ENABLE CONTROL REGISTER 1
2011-2012 Microchip Technology Inc. DS39995C-page 93
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REGISTER 8-14: IEC3: INTERRUPT ENABLE CONTROL REGISTER 3
U-0 R/W-0 U-0 U-0 U-0 U-0 U-0 U-0
—RTCIE— — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0 U-0
— — — — —MI2C2IESI2C2IE—
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14 RTCIE: Real-Time Clock and Calendar Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 13-3 Unimplemented: Read as ‘0’
bit 2 MI2C2IE: Master I2C2 Event Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 1 SI2C2IE: Slave I2C2 Event Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 0 Unimplemented: Read as ‘0’
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DS39995C-page 94 2011-2012 Microchip Technology Inc.
REGISTER 8-15: IEC4: INTERRUPT ENABLE CONTROL REGISTER 4
U-0 U-0 R/W-0 U-0 U-0 U-0 U-0 R/W-0
——CTMUIE————HLVDIE
bit 15 bit 8
U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 U-0
———— CRCIE U2ERIE U1ERIE —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13 CTMUIE: CTMU Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 12-9 Unimplemented: Read as ‘0’
bit 8 HLVDIE: High/Low-Voltage Detect Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 7-4 Unimplemented: Read as ‘0’
bit 3 CRCIE: CRC Generator Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 2 U2ERIE: UART2 Error Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 1 U1ERIE: UART1 Error Interrupt Enable bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
bit 0 Unimplemented: Read as ‘0’
2011-2012 Microchip Technology Inc. DS39995C-page 95
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REGISTER 8-16: IEC5: INTERRUPT ENABLE CONTROL REGISTER 5
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0
— — — — — — —ULPWUIE
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-1 Unimplemented: Read as ‘0’
bit 0 ULPWUIE: Ultra Low-Power Wake-up Interrupt Enable Bit
1 = Interrupt request is enabled
0 = Interrupt request is not enabled
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DS39995C-page 96 2011-2012 Microchip Technology Inc.
REGISTER 8-17: IPC0: INTERRUPT PRIORITY CONTROL REGISTER 0
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— T1IP2 T1IP1 T1IP0 — OC1IP2 OC1IP1 OC1IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— IC1IP2 IC1IP1 IC1IP0 — INT0IP2 INT0IP1 INT0IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 T1IP<2:0>: Timer1 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 OC1IP<2:0>: Output Compare Channel 1 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 IC1IP<2:0>: Input Capture Channel 1 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 INT0IP<2:0>: External Interrupt 0 Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
2011-2012 Microchip Technology Inc. DS39995C-page 97
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REGISTER 8-18: IPC1: INTERRUPT PRIORITY CONTROL REGISTER 1
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— T2IP2 T2IP1 T2IP0 — OC2IP2 OC2IP1 OC2IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— IC2IP2 IC2IP1 IC2IP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 T2IP<2:0>: Timer2 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 OC2IP<2:0>: Output Compare Channel 2 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 IC2IP<2:0>: Input Capture Channel 2 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
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DS39995C-page 98 2011-2012 Microchip Technology Inc.
REGISTER 8-19: IPC2: INTERRUPT PRIORITY CONTROL REGISTER 2
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— U1RXIP2 U1RXIP1 U1RXIP0 — SPI1IP2 SPI1IP1 SPI1IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— SPF1IP2 SPF1IP1 SPF1IP0 — T3IP2 T3IP1 T3IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 U1RXIP<2:0>: UART1 Receiver Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 SPI1IP<2:0>: SPI1 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 SPF1IP<2:0>: SPI1 Fault Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 T3IP<2:0>: Timer3 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
2011-2012 Microchip Technology Inc. DS39995C-page 99
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REGISTER 8-20: IPC3: INTERRUPT PRIORITY CONTROL REGISTER 3
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— NVMIP2 NVMIP1 NVMIP0 — — — —
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— AD1IP2 AD1IP1 AD1IP0 — U1TXIP2 U1TXIP1 U1TXIP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 NVMIP<2:0>: NVM Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11-7 Unimplemented: Read as ‘0’
bit 6-4 AD1IP<2:0>: A/D Conversion Complete Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 U1TXIP<2:0>: UART1 Transmitter Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
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DS39995C-page 100 2011-2012 Microchip Technology Inc.
REGISTER 8-21: IPC4: INTERRUPT PRIORITY CONTROL REGISTER 4
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— CNIP2 CNIP1 CNIP0 — CMIP2 CMIP1 CMIP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— MI2C1P2 MI2C1P1 MI2C1P0 — SI2C1P2 SI2C1P1 SI2C1P0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 CNIP<2:0>: Input Change Notification Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 CMIP<2:0>: Comparator Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 MI2C1P<2:0>: Master I2C1 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 SI2C1P<2:0>: Slave I2C1 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
2011-2012 Microchip Technology Inc. DS39995C-page 101
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REGISTER 8-22: IPC5: INTERRUPT PRIORITY CONTROL REGISTER 5
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — INT1IP2 INT1IP1 INT1IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-3 Unimplemented: Read as ‘0’
bit 2-0 INT1IP<2:0>: External Interrupt 1 Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
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DS39995C-page 102 2011-2012 Microchip Technology Inc.
REGISTER 8-23: IPC6: INTERRUPT PRIORITY CONTROL REGISTER 6
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— T4IP2 T4IP1 T4IP0 — — — —
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— OC3IP2 OC3IP1 OC3IP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 T4IP<2:0>: Timer4 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11-7 Unimplemented: Read as ‘0’
bit 6-4 OC3IP<2:0>: Output Compare Channel 3 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
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REGISTER 8-24: IPC7: INTERRUPT PRIORITY CONTROL REGISTER 7
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— U2TXIP2 U2TXIP1 U2TXIP0 — U2RXIP2 U2RXIP1 U2RXIP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— INT2IP2 INT2IP1 INT2IP0 — T5IP2 T5IP1 T5IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 U2TXIP<2:0>: UART2 Transmitter Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 U2RXIP<2:0>: UART2 Receiver Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 INT2IP<2:0>: External Interrupt 2 Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 T5IP<2:0>: Timer5 Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
PIC24FV32KA304 FAMILY
DS39995C-page 104 2011-2012 Microchip Technology Inc.
REGISTER 8-25: IPC8: INTERRUPT PRIORITY CONTROL REGISTER 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— SPI2IP2 SPI2IP1 SPI2IP0 — SPF2IP2 SPF2IP1 SPF2IP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-7 Unimplemented: Read as ‘0’
bit 6-4 SPI2IP<2:0>: SPI2 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3 Unimplemented: Read as ‘0’
bit 2-0 SPF2IP<2:0>: SPI2 Fault Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
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REGISTER 8-26: IPC9: INTERRUPT PRIORITY CONTROL REGISTER 9
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— IC3IP2 IC3IP1 IC3IP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-7 Unimplemented: Read as ‘0’
bit 6-4 IC3IP<2:0>: Input Capture Channel 3 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
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REGISTER 8-27: IPC12: INTERRUPT PRIORITY CONTROL REGISTER 12
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — MI2C2IP2 MI2C2IP1 MI2C2IP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— SI2C2IP2 SI2C2IP1 SI2C2IP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 MI2C2IP <2 :0>: Master I2C2 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 SI2C2IP<2:0>: Slave I2C2 Event Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
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REGISTER 8-28: IPC15: INTERRUPT PRIORITY CONTROL REGISTER 15
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — RTCIP2 RTCIP1 RTCIP0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 RTCIP<2:0>: Real-Time Clock and Calendar Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7-0 Unimplemented: Read as ‘0’
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DS39995C-page 108 2011-2012 Microchip Technology Inc.
REGISTER 8-29: IPC16: INTERRUPT PRIORITY CONTROL REGISTER 16
U-0 R/W-1 R/W-0 R/W-0 U-0 R/W-1 R/W-0 R/W-0
— CRCIP2 CRCIP1 CRCIP0 — U2ERIP2 U2ERIP1 U2ERIP0
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— U1ERIP2 U1ERIP1 U1ERIP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 CRCIP<2:0>: CRC Generator Error Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 11 Unimplemented: Read as ‘0’
bit 10-8 U2ERIP<2:0>: UART2 Error Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 7 Unimplemented: Read as ‘0’
bit 6-4 U1ERIP<2:0>: UART1 Error Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
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REGISTER 8-30: IPC18: INTERRUPT PRIORITY CONTROL REGISTER 18
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — HLVDIP2 HLVDIP1 HLVDIP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-3 Unimplemented: Read as ‘0’
bit 2-0 HLVDIP<2:0>: High/Low-Voltage Detect Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
REGISTER 8-31: IPC19: INTERRUPT PRIORITY CONTROL REGISTER 19
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 R/W-1 R/W-0 R/W-0 U-0 U-0 U-0 U-0
— CTMUIP2 CTMUIP1 CTMUIP0 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-7 Unimplemented: Read as ‘0’
bit 6-4 CTMUIP<2:0>: CTMU Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
bit 3-0 Unimplemented: Read as ‘0’
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REGISTER 8-32: IPC20: INTERRUPT PRIORITY CONTROL REGISTER 20
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-0 R/W-0
— — — — — ULPWUIP2 ULPWUIP1 ULPWUIP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-3 Unimplemented: Read as ‘0’
bit 6-4 ULPWUIP<2:0>: Ultra Low-Power Wake-up Interrupt Priority bits
111 = Interrupt is Priority 7 (highest priority interrupt)
•
•
•
001 = Interrupt is Priority 1
000 = Interrupt source is disabled
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REGISTER 8-33: INTTREG: INTERRUPT CONTROL AND STATUS REGISTER
R-0 U-0 R/W-0 U-0 R-0 R-0 R-0 R-0
CPUIRQ —VHOLD— ILR3 ILR2 ILR1 ILR0
bit 15 bit 8
U-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
— VECNUM6 VECNUM5 VECNUM4 VECNUM3 VECNUM2 VECNUM1 VECNUM0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CPUIRQ: Interrupt Request from Interrupt Controller CPU bit
1 = An interrupt request has occurred but has not yet been Acknowledged by the CPU (this will
happen when the CPU priority is higher than the interrupt priority)
0 = No interrupt request is left unacknowledged
bit 14 Unimplemented: Read as ‘0’
bit 13 VHOLD: Vector Hold bit
Allows Vector Number Capture and Changes which Interrupt is Stored in the VECNUM bit:
1 = VECNUM will contain the value of the highest priority pending interrupt, instead of the current
interrupt
0 = VECNUM will contain the value of the last Acknowledged interrupt (last interrupt that has occurred
with higher priority than the CPU, even if other interrupts are pending)
bit 12 Unimplemented: Read as ‘0’
bit 11-8 ILR<3:0>: New CPU Interrupt Priority Level bits
1111 = CPU Interrupt Priority Level is 15
•
•
•
0001 = CPU Interrupt Priority Level is 1
0000 = CPU Interrupt Priority Level is 0
bit 7 Unimplemented: Read as ‘0’
bit 6-0 VECNUM<6:0>: Vector Number of Pending Interrupt bits
0111111 = Interrupt vector pending is Number 135
•
•
•
0000001 = Interrupt vector pending is Number 9
0000000 = Interrupt vector pending is Number 8
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8.4 Interrupt Setup Procedures
8.4.1 INITIALIZATION
To configure an interrupt source:
1. Set the NSTDIS control bit (INTCON1<15>) if
nested interrupts are not desired.
2. Select the user-assigned priority level for the
interrupt source by writing the control bits in the
appropriate IPCx register. The priority level will
depend on the specific application and type of
interrupt source. If multiple priority levels are not
desired, the IPCx register control bits for all
enabled interrupt sources may be programmed
to the same non-zero value.
3. Clear the interrupt flag status bit associated with
the peripheral in the associated IFSx register.
4. Enable the interrupt source by setting the
interrupt enable control bit associated with the
source in the appropriate IECx register.
8.4.2 INTERRUPT SERVICE ROUTINE
The method that is used to declare an ISR (Interrupt
Service Routine) and initialize the IVT with the correct
vector address depends on the programming language
(i.e., C or assembly) and the language development
toolsuite that is used to develop the application. In
general, the user must clear the interrupt flag in the
appropriate IFSx register for the source of the interrupt
that the ISR handles. Otherwise, the ISR will be
re-entered immediately after exiting the routine. If the
ISR is coded in assembly language, it must be termi-
nated using a RETFIE instruction to unstack the saved
PC value, SRL value and old CPU priority level.
8.4.3 TRAP SERVICE ROUTINE (TSR)
A Trap Service Routine (TSR) is coded like an ISR,
except that the appropriate trap status flag in the
INTCON1 register must be cleared to avoid re-entry
into the TSR.
8.4.4 INTERRUPT DISABLE
All user interrupts can be disabled using the following
procedure:
1. Push the current SR value onto the software
stack using the PUSH instruction.
2. Force the CPU to Priority Level 7 by inclusive
ORing the value, OEh with SRL.
To enable user interrupts, the POP instruction may be
used to restore the previous SR value.
Only user interrupts with a priority level of 7 or less can
be disabled. Trap sources (Level 8-15) cannot be
disabled.
The DISI instruction provides a convenient way to
disable interrupts of Priority Levels 1-6 for a fixed
period. Level 7 interrupt sources are not disabled by
the DISI instruction.
Note: At a device Reset, the IPCx registers are
initialized, such that all user interrupt
sources are assigned to Priority Level 4.
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9.0 OSCILLATOR
CONFIGURATION
The oscillator system for the PIC24FV32KA304 family
of devices has the following features:
• A total of five external and internal oscillator options
as clock sources, providing 11 different clock
modes.
• On-chip 4x Phase Locked Loop (PLL) to boost
internal operating frequency on select internal and
external oscillator sources.
• Software-controllable switching between various
clock sources.
• Software-controllable postscaler for selective
clocking of CPU for system power savings.
• System frequency range declaration bits for EC
mode. When using an external clock source, the
current consumption is reduced by setting the
declaration bits to the expected frequency range.
• A Fail-Safe Clock Monitor (FSCM) that detects clock
failure and permits safe application recovery or
shutdown.
A simplified diagram of the oscillator system is shown in
Figure 9-1.
FIGURE 9-1: PIC24FV32KA304 FAMILY CLOCK DIAGRAM
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on
Oscillator Configuration, refer to the
“PIC24F Family Reference Manual”,
Section 38. “Oscillator with 500 kHz
Low-Power FRC” (DS39726).
Secondary Oscillator
SOSCEN
Enable
Oscillator
SOSCO
SOSCI
Clock Source Option
for Other Modules
OSCI
OSCO
Primary Oscillator
XT, HS, EC
Postscaler
CLKDIV<10:8>
WDT, PWRT, DSWDT
FRCDIV
31 kHz (nominal)
8 MHz
FRC
SOSC
LPRC
Clock Control Logi c
Fail-Safe
Clock
Monitor
FRC
4 x PLL
XTPLL, HSPLL
ECPLL,FRCPLL
8 MHz
4 MHz
CPU
Peripherals
Postscaler
CLKDIV<14:12>
CLKO
Reference Clock
Generator
REFO
REFOCON<15:8>
Oscillator
500 kHz
LPFRC
Oscillator
LPRC
Oscillator
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DS39995C-page 114 2011-2012 Microchip Technology Inc.
9.1 CPU Clocking Scheme
The system clock source can be provided by one of
four sources:
• Primary Oscillator (POSC) on the OSCI and OSCO
pins
• Secondary Oscillator (SOSC) on the SOSCI and
SOSCO pins
The PIC24FV32KA304 family devices consist of
two types of secondary oscillator:
- High-Power Secondary Oscillator
- Low-Power Secondary Oscillator
These can be selected by using the SOSCSEL
(FOSC<5>) bit.
• Fast Internal RC (FRC) Oscillator
- 8 MHz FRC Oscillator
- 500 kHz Lower Power FRC Oscillator
• Low-Power Internal RC (LPRC) Oscillator with two
modes:
- High-Power/High Accuracy mode
- Low-Power/Low Accuracy mode
The primary oscillator and 8 MHz FRC sources have the
option of using the internal 4x PLL. The frequency of the
FRC clock source can optionally be reduced by the pro-
grammable clock divider. The selected clock source
generates the processor and peripheral clock sources.
The processor clock source is divided by two to produce
the internal instruction cycle clock, FCY. In this
document, the instruction cycle clock is also denoted by
FOSC/2. The internal instruction cycle clock, FOSC/2, can
be provided on the OSCO I/O pin for some operating
modes of the primary oscillator.
9.2 Initial Con fi guration on POR
The oscillator source (and operating mode) that is used
at a device Power-on Reset (POR) event is selected
using Configuration bit settings. The Oscillator
Configuration bit settings are located in the Configuration
registers in the program memory (for more information,
see Section 26.1 “Configuration Bits”). The Primary
Oscillator Configuration bits, POSCMD<1:0>
(FOSC<1:0>), and the Initial Oscillator Select
Configuration bits, FNOSC<2:0> (FOSCSEL<2:0>),
select the oscillator source that is used at a POR. The
FRC Primary Oscillator with Postscaler (FRCDIV) is
the default (unprogrammed) selection. The secondary
oscillator, or one of the internal oscillators, may be
chosen by programming these bit locations. The EC
mode Frequency Range Configuration bits,
POSCFREQ<1:0> (FOSC<4:3>), optimize power
consumption when running in EC mode. The default
configuration is “frequency range is greater than
8MHz”.
The Configuration bits allow users to choose between
the various clock modes, shown in Tab l e 9 - 1.
9.2.1 CLOCK SWITCHING MODE
CONFIGURATION BITS
The FCKSMx Configuration bits (FOSC<7:6>) are
used jointly to configure device clock switching and the
FSCM. Clock switching is enabled only when FCKSM1
is programmed (‘0’). The FSCM is enabled only when
FCKSM<1:0> are both programmed (‘00’).
TABLE 9-1: CONFIGURATION BIT VALUES FOR CLOCK SELECTION
Oscillator Mode Oscillator Source POSCMD<1:0> FNOSC<2:0> Notes
8 MHz FRC Oscillator with Postscaler
(FRCDIV)
Internal 11 111 1, 2
500 kHz FRC Oscillator with Postscaler
(LPFRCDIV)
Internal 11 110 1
Low-Power RC Oscillator (LPRC) Internal 11 101 1
Secondary (Timer1) Oscillator (SOSC) Secondary 00 100 1
Primary Oscillator (HS) with PLL Module
(HSPLL)
Primary 10 011
Primary Oscillator (EC) with PLL Module
(ECPLL)
Primary 00 011
Primary Oscillator (HS) Primary 10 010
Primary Oscillator (XT) Primary 01 010
Primary Oscillator (EC) Primary 00 010
8 MHz FRC Oscillator with PLL Module
(FRCPLL)
Internal 11 001 1
8 MHz FRC Oscillator (FRC) Internal 11 000 1
Note 1: The OSCO pin function is determined by the OSCIOFNC Configuration bit.
2: This is the default oscillator mode for an unprogrammed (erased) device.
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9.3 Control Registers
The operation of the oscillator is controlled by three
Special Function Registers (SFRs):
• OSCCON
•CLKDIV
•OSCTUN
The OSCCON register (Register 9-1) is the main
control register for the oscillator. It controls clock
source switching and allows the monitoring of clock
sources.
The Clock Divider register (Register 9-2) controls the
features associated with Doze mode, as well as the
postscaler for the FRC oscillator.
The FRC Oscillator Tune register (Register 9-3) allows
the user to fine tune the FRC oscillator over a range of
approximately ±5.25%. Each bit increment or decre-
ment changes the factory calibrated frequency of the
FRC oscillator by a fixed amount.
REGISTER 9-1: OSCCON: OSCILLATOR CONTROL REGISTER
U-0 R-0, HSC R-0, HSC R-0, HSC U-0 R/W-x(1)R/W-x(1)R/W-x(1)
— COSC2 COSC1 COSC0 — NOSC2 NOSC1 NOSC0
bit 15 bit 8
R/SO-0, HSC U-0 R-0, HSC(2)U-0 R/CO-0, HS R/W-0(3) R/W-0 R/W-0
CLKLOCK —LOCK— CF SOSCDRV SOSCEN OSWEN
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
HS = Hardware Settable bit CO = Clearable Only bit SO = Settable Only bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 COSC<2:0>: Current Oscillator Selection bits
111 = 8 MHz Fast RC Oscillator with Postscaler (FRCDIV)
110 = 500 kHz Low-Power Fast RC Oscillator (FRC) with Postscaler (LPFRCDIV)
101 = Low-Power RC Oscillator (LPRC)
100 = Secondary Oscillator (SOSC)
011 = Primary Oscillator with PLL module (XTPLL, HSPLL, ECPLL)
010 = Primary Oscillator (XT, HS, EC)
001 = 8 MHz FRC Oscillator with Postscaler and PLL module (FRCPLL)
000 = 8 MHz FRC Oscillator (FRC)
bit 11 Unimplemented: Read as ‘0’
bit 10-8 NOSC<2:0>: New Oscillator Selection bits(1)
111 = 8 MHz Fast RC Oscillator with Postscaler (FRCDIV)
110 = 500 kHz Low-Power Fast RC Oscillator (FRC) with Postscaler (LPFRCDIV)
101 = Low-Power RC Oscillator (LPRC)
100 = Secondary Oscillator (SOSC)
011 = Primary Oscillator with PLL module (XTPLL, HSPLL, ECPLL)
010 = Primary Oscillator (XT, HS, EC)
001 = 8 MHz FRC Oscillator with Postscaler and PLL module (FRCPLL)
000 = 8 MHz FRC Oscillator (FRC)
Note 1: Reset values for these bits are determined by the FNOSCx Configuration bits.
2: This bit also resets to ‘0’ during any valid clock switch or whenever a non-PLL Clock mode is selected.
3: When SOSC is selected to run from a digital clock input, rather than an external crystal (SOSCSRC = 0),
this bit has no effect.
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bit 7 CLKLOCK: Clock Selection Lock Enabled bit
If FSCM is enabled (FCKSM1 = 1):
1 = Clock and PLL selections are locked
0 = Clock and PLL selections are not locked and may be modified by setting the OSWEN bit
If FSCM is disabled (FCKSM1 = 0):
Clock and PLL selections are never locked and may be modified by setting the OSWEN bit.
bit 6 Unimplemented: Read as ‘0’
bit 5 LOCK: PLL Lock Status bit(2)
1 = PLL module is in lock or PLL module start-up timer is satisfied
0 = PLL module is out of lock, PLL start-up timer is running or PLL is disabled
bit 4 Unimplemented: Read as ‘0’
bit 3 CF: Clock Fail Detect bit
1 = FSCM has detected a clock failure
0 = No clock failure has been detected
bit 2 SOSCDRV: Secondary Oscillator Drive Strength bit(3)
1 = High-power SOSC circuit is selected
0 = Low/high-power select is done via the SOSCSRC Configuration bit
bit 1 SOSCEN: 32 kHz Secondary Oscillator (SOSC) Enable bit
1 = Enables the secondary oscillator
0 = Disables the secondary oscillator
bit 0 OSWEN: Oscillator Switch Enable bit
1 = Initiates an oscillator switch to the clock source specified by the NOSC<2:0> bits
0 = Oscillator switch is complete
REGISTER 9-1: OSCCON: OSCILLATOR CONTROL REGISTER (CONTINUED)
Note 1: Reset values for these bits are determined by the FNOSCx Configuration bits.
2: This bit also resets to ‘0’ during any valid clock switch or whenever a non-PLL Clock mode is selected.
3: When SOSC is selected to run from a digital clock input, rather than an external crystal (SOSCSRC = 0),
this bit has no effect.
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REGISTER 9-2: CLKDIV: CLOCK DIVIDER REGISTER
R/W-0 R/W-0 R/W-1 R/W-1 R/W-0 R/W-0 R/W-0 R/W-1
ROI DOZE2 DOZE1 DOZE0 DOZEN(1)RCDIV2 RCDIV1 RCDIV0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ROI: Recover on Interrupt bit
1 = Interrupts clear the DOZEN bit, and reset the CPU and peripheral clock ratio to 1:1
0 = Interrupts have no effect on the DOZEN bit
bit 14-12 DOZE<2:0>: CPU and Peripheral Clock Ratio Select bits
111 = 1:128
110 = 1:64
101 = 1:32
100 = 1:16
011 = 1:8
010 = 1:4
001 = 1:2
000 = 1:1
bit 11 DOZEN: Doze Enable bit(1)
1 = DOZE<2:0> bits specify the CPU and peripheral clock ratio
0 = CPU and peripheral clock ratio are set to 1:1
bit 10-8 RCDIV<2:0>: FRC Postscaler Select bits
When COSC<2:0> (OSCCON<14:12>) = 111:
111 = 31.25 kHz (divide-by-256)
110 = 125 kHz (divide-by-64)
101 = 250 kHz (divide-by-32)
100 = 500 kHz (divide-by-16)
011 = 1 MHz (divide-by-8)
010 = 2 MHz (divide-by-4)
001 = 4 MHz (divide-by-2) (default)
000 = 8 MHz (divide-by-1)
When COSC<2:0> (OSCCON<14:12>) = 110:
111 = 1.95 kHz (divide-by-256)
110 = 7.81 kHz (divide-by-64)
101 = 15.62 kHz (divide-by-32)
100 = 31.25 kHz (divide-by-16)
011 = 62.5 kHz (divide-by-8)
010 = 125 kHz (divide-by-4)
001 = 250 kHz (divide-by-2) (default)
000 = 500 kHz (divide-by-1)
bit 7-0 Unimplemented: Read as ‘0’
Note 1: This bit is automatically cleared when the ROI bit is set and an interrupt occurs.
PIC24FV32KA304 FAMILY
DS39995C-page 118 2011-2012 Microchip Technology Inc.
REGISTER 9-3: OSCTUN: FRC OSCILLATOR TUNE REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— TUN5(1)TUN4(1)TUN3(1)TUN2(1)TUN1(1)TUN0(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-6 Unimplemented: Read as ‘0’
bit 5-0 TUN<5:0>: FRC Oscillator Tuning bits(1)
011111 = Maximum frequency deviation
011110
•
•
•
000001
000000 = Center frequency, oscillator is running at factory calibrated frequency
111111
•
•
•
100001
100000 = Minimum frequency deviation
Note 1: Increments or decrements of TUN<5:0> may not change the FRC frequency in equal steps over the FRC
tuning range and may not be monotonic.
2011-2012 Microchip Technology Inc. DS39995C-page 119
PIC24FV32KA304 FAMILY
9.4 Clock Switching Operation
With few limitations, applications are free to switch
between any of the four clock sources (POSC, SOSC,
FRC and LPRC) under software control and at any
time. To limit the possible side effects that could result
from this flexibility, PIC24F devices have a safeguard
lock built into the switching process.
9.4.1 ENABLING CLOCK SWITCHING
To enable clock switching, the FCKSM1 Configuration bit
in the FOSC Configuration register must be programmed
to ‘0’. (Refer to Section 26.0 “Special Features” for
further details.) If the FCKSM1 Configuration bit is
unprogrammed (‘1’), the clock switching function and
FSCM function are disabled. This is the default setting.
The NOSCx control bits (OSCCON<10:8>) do not
control the clock selection when clock switching is
disabled. However, the COSCx bits (OSCCON<14:12>)
will reflect the clock source selected by the FNOSCx
Configuration bits.
The OSWEN control bit (OSCCON<0>) has no effect
when clock switching is disabled; it is held at ‘0’ at all
times.
9.4.2 OSCILLATOR SWITCHING
SEQUENCE
At a minimum, performing a clock switch requires this
basic sequence:
1. If desired, read the COSCx bits
(OSCCON<14:12>) to determine the current
oscillator source.
2. Perform the unlock sequence to allow a write to
the OSCCON register high byte.
3. Write the appropriate value to the NOSCx bits
(OSCCON<10:8>) for the new oscillator source.
4. Perform the unlock sequence to allow a write to
the OSCCON register low byte.
5. Set the OSWEN bit to initiate the oscillator
switch.
Once the basic sequence is completed, the system
clock hardware responds automatically, as follows:
1. The clock switching hardware compares the
COSCx bits with the new value of the NOSCx
bits. If they are the same, then the clock switch
is a redundant operation. In this case, the
OSWEN bit is cleared automatically and the
clock switch is aborted.
2. If a valid clock switch has been initiated, the
LOCK (OSCCON<5>) and CF (OSCCON<3>)
bits are cleared.
3. The new oscillator is turned on by the hardware
if it is not currently running. If a crystal oscillator
must be turned on, the hardware will wait until
the OST expires. If the new source is using the
PLL, then the hardware waits until a PLL lock is
detected (LOCK = 1).
4. The hardware waits for 10 clock cycles from the
new clock source and then performs the clock
switch.
5. The hardware clears the OSWEN bit to indicate a
successful clock transition. In addition, the
NOSCx bits value is transferred to the COSCx
bits.
6. The old clock source is turned off at this time,
with the exception of LPRC (if WDT, FSCM or
RTCC with LPRC as a clock source is enabled)
or SOSC (if SOSCEN remains enabled).
Note: The Primary Oscillator mode has three
different submodes (XT, HS and EC),
which are determined by the POSCMDx
Configuration bits. While an application
can switch to and from Primary Oscillator
mode in software, it cannot switch
between the different primary submodes
without reprogramming the device.
Note 1: The processor will continue to execute
code throughout the clock switching
sequence. Timing-sensitive code should
not be executed during this time.
2: Direct clock switches between any
Primary Oscillator mode with PLL and
FRCPLL mode are not permitted. This
applies to clock switches in either direc-
tion. In these instances, the application
must switch to FRC mode as a transition
clock source between the two PLL
modes.
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DS39995C-page 120 2011-2012 Microchip Technology Inc.
The following code sequence for a clock switch is
recommended:
1. Disable interrupts during the OSCCON register
unlock and write sequence.
2. Execute the unlock sequence for the OSCCON
high byte by writing 78h and 9Ah to
OSCCON<15:8>, in two back-to-back
instructions.
3. Write new oscillator source to the NOSCx bits in
the instruction immediately following the unlock
sequence.
4. Execute the unlock sequence for the OSCCON
low byte by writing 46h and 57h to
OSCCON<7:0>, in two back-to-back instructions.
5. Set the OSWEN bit in the instruction immediately
following the unlock sequence.
6. Continue to execute code that is not
clock-sensitive (optional).
7. Invoke an appropriate amount of software delay
(cycle counting) to allow the selected oscillator
and/or PLL to start and stabilize.
8. Check to see if OSWEN is ‘0’. If it is, the switch
was successful. If OSWEN is still set, then check
the LOCK bit to determine the cause of failure.
The core sequence for unlocking the OSCCON register
and initiating a clock switch is shown in Example 9-1.
EXAMPLE 9-1: BASIC CODE SEQUENCE
FOR CLOCK SWITCHING
9.5 Reference Clock Output
In addition to the CLKO output (FOSC/2) available in
certain oscillator modes, the device clock in the
PIC24FV32KA304 family devices can also be
configured to provide a reference clock output signal to
a port pin. This feature is available in all oscillator
configurations and allows the user to select a greater
range of clock submultiples to drive external devices in
the application.
This reference clock output is controlled by the
REFOCON register (Register 9-4). Setting the ROEN
bit (REFOCON<15>) makes the clock signal available
on the REFO pin. The RODIV bits (REFOCON<11:8>)
enable the selection of 16 different clock divider
options.
The ROSSLP and ROSEL bits (REFOCON<13:12>)
control the availability of the reference output during
Sleep mode. The ROSEL bit determines if the oscillator
on OSC1 and OSC2, or the current system clock
source, is used for the reference clock output. The
ROSSLP bit determines if the reference source is
available on REFO when the device is in Sleep mode.
To use the reference clock output in Sleep mode, both
the ROSSLP and ROSEL bits must be set. The device
clock must also be configured for one of the primary
modes (EC, HS or XT); otherwise, if the ROSEL bit is
not also set, the oscillator on OSC1 and OSC2 will be
powered down when the device enters Sleep mode.
Clearing the ROSEL bit allows the reference output
frequency to change as the system clock changes
during any clock switches.
;Place the new oscillator selection in W0
;OSCCONH (high byte) Unlock Sequence
MOV #OSCCONH, w1
MOV #0x78, w2
MOV #0x9A, w3
MOV.b w2, [w1]
MOV.b w3, [w1]
;Set new oscillator selection
MOV.b WREG, OSCCONH
;OSCCONL (low byte) unlock sequence
MOV #OSCCONL, w1
MOV #0x46, w2
MOV #0x57, w3
MOV.b w2, [w1]
MOV.b w3, [w1]
;Start oscillator switch operation
BSET OSCCON,#0
2011-2012 Microchip Technology Inc. DS39995C-page 121
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REGISTER 9-4: REFOCON: REFERENCE OSCILLATOR CONTROL REGISTER
R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ROEN — ROSSLP ROSEL RODIV3 RODIV2 RODIV1 RODIV0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ROEN: Reference Oscillator Output Enable bit
1 = Reference oscillator is enabled on REFO pin
0 = Reference oscillator is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 ROSSLP: Reference Oscillator Output Stop in Sleep bit
1 = Reference oscillator continues to run in Sleep
0 = Reference oscillator is disabled in Sleep
bit 12 ROSEL: Reference Oscillator Source Select bit
1 = Primary oscillator is used as the base clock(1)
0 = System clock is used as the base clock; base clock reflects any clock switching of the device
bit 11-8 RODIV<3:0>: Reference Oscillator Divisor Select bits
1111 = Base clock value divided by 32,768
1110 = Base clock value divided by 16,384
1101 = Base clock value divided by 8,192
1100 = Base clock value divided by 4,096
1011 = Base clock value divided by 2,048
1010 = Base clock value divided by 1,024
1001 = Base clock value divided by 512
1000 = Base clock value divided by 256
0111 = Base clock value divided by 128
0110 = Base clock value divided by 64
0101 = Base clock value divided by 32
0100 = Base clock value divided by 16
0011 = Base clock value divided by 8
0010 = Base clock value divided by 4
0001 = Base clock value divided by 2
0000 = Base clock value
bit 7-0 Unimplemented: Read as ‘0’
Note 1: The crystal oscillator must be enabled using the FOSC<2:0> bits; the crystal maintains the operation in
Sleep mode.
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DS39995C-page 122 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 123
PIC24FV32KA304 FAMILY
10.0 POWER-SA VING FEATURES
The PIC24FV32KA304 family of devices provides the
ability to manage power consumption by selectively
managing clocking to the CPU and the peripherals. In
general, a lower clock frequency and a reduction in the
number of circuits being clocked constitutes lower
consumed power. All PIC24F devices manage power
consumption in four different ways:
• Clock frequency
• Instruction-based Sleep, Idle and Deep Sleep
modes
• Software Controlled Doze mode
• Selective peripheral control in software
Combinations of these methods can be used to
selectively tailor an application’s power consumption,
while still maintaining critical application features, such
as timing-sensitive communications.
10.1 Clock Frequency and Clock
Switching
PIC24F devices allow for a wide range of clock
frequencies to be selected under application control. If
the system clock configuration is not locked, users can
choose low-power or high-precision oscillators by simply
changing the NOSCx bits. The process of changing a
system clock during operation, as well as limitations to
the process, are discussed in more detail in Section 9.0
“Oscillator Configuration”.
10.2 Instruction-Based Power-Saving
Modes
PIC24F devices have two special power-saving modes
that are entered through the execution of a special
PWRSAV instruction. Sleep mode stops clock operation
and halts all code execution; Idle mode halts the CPU
and code execution, but allows peripheral modules to
continue operation. Deep Sleep mode stops clock
operation, code execution and all peripherals, except
RTCC and DSWDT. It also freezes I/O states and
removes power to SRAM and Flash memory.
The assembly syntax of the PWRSAV instruction is
shown in Example 10-1.
Sleep and Idle modes can be exited as a result of an
enabled interrupt, WDT time-out or a device Reset.
When the device exits these modes, it is said to
“wake-up”.
10.2.1 SLEEP MODE
Sleep mode includes these features:
• The system clock source is shut down. If an
on-chip oscillator is used, it is turned off.
• The device current consumption will be reduced
to a minimum provided that no I/O pin is sourcing
current.
• The I/O pin directions and states are frozen.
• The Fail-Safe Clock Monitor does not operate
during Sleep mode since the system clock source
is disabled.
• The LPRC clock will continue to run in Sleep
mode if the WDT or RTCC with LPRC as the clock
source is enabled.
• The WDT, if enabled, is automatically cleared
prior to entering Sleep mode.
• Some device features or peripherals may
continue to operate in Sleep mode. This includes
items, such as the input change notification on the
I/O ports, or peripherals that use an external clock
input. Any peripheral that requires the system
clock source for its operation will be disabled in
Sleep mode.
The device will wake-up from Sleep mode on any of
these events:
• On any interrupt source that is individually
enabled
• On any form of device Reset
• On a WDT time-out
On wake-up from Sleep, the processor will restart with
the same clock source that was active when Sleep
mode was entered.
EXAMPL E 10-1: PWRSAV INSTRUCTION SYNTAX
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is
not intended to be a comprehensive
reference source. For more information,
refer to the “PIC24F Family Reference
Manual”, ”Section 39. Power-Saving
Feature s with Deep Sleep” (DS39727).
Note: SLEEP_MODE and IDLE_MODE are
constants defined in the assembler
include file for the selected device.
PWRSAV #SLEEP_MODE ; Put the device into SLEEP mode
PWRSAV #IDLE_MODE ; Put the device into IDLE mode
BSET DSCON, #DSEN ; Enable Deep Sleep
PWRSAV #SLEEP_MODE ; Put the device into Deep SLEEP mode
PIC24FV32KA304 FAMILY
DS39995C-page 124 2011-2012 Microchip Technology Inc.
10.2.2 IDLE MODE
Idle mode has these features:
• The CPU will stop executing instructions.
• The WDT is automatically cleared.
• The system clock source remains active. By
default, all peripheral modules continue to operate
normally from the system clock source, but can
also be selectively disabled (see Section 10.6
“Selective Peripheral Module Control”).
• If the WDT or FSCM is enabled, the LPRC will
also remain active.
The device will wake from Idle mode on any of these
events:
• Any interrupt that is individually enabled
• Any device Reset
• A WDT time-out
On wake-up from Idle, the clock is re-applied to the
CPU and instruction execution begins immediately,
starting with the instruction following the PWRSAV
instruction or the first instruction in the ISR.
10.2.3 INTERRUPTS COINCIDENT WITH
POWER SAVE INSTRUCTIONS
Any interrupt that coincides with the execution of a
PWRSAV instruction will be held off until entry into Sleep
or Idle mode has completed. The device will then
wake-up from Sleep or Idle mode.
10.2.4 DEEP SLEEP MODE
In PIC24FV32KA304 family devices, Deep Sleep mode
is intended to provide the lowest levels of power
consumption available without requiring the use of
external switches to completely remove all power from
the device. Entry into Deep Sleep mode is completely
under software control. Exit from Deep Sleep mode can
be triggered from any of the following events:
• POR event
•MCLR
event
• RTCC alarm (If the RTCC is present)
• External Interrupt 0
• Deep Sleep Watchdog Timer (DSWDT) time-out
• Ultra Low-Power Wake-up (ULPWU) event
In Deep Sleep mode, it is possible to keep the device
Real-Time Clock and Calendar (RTCC) running without
the loss of clock cycles.
The device has a dedicated Deep Sleep Brown-out
Reset (DSBOR) and a Deep Sleep Watchdog Timer
Reset (DSWDT) for monitoring voltage and time-out
events. The DSBOR and DSWDT are independent of
the standard BOR and WDT used with other
power-managed modes (Sleep, Idle and Doze).
10.2.4.1 Entering Deep Sleep Mode
Deep Sleep mode is entered by setting the DSEN bit in
the DSCON register and then executing a Sleep com-
mand (PWRSAV #SLEEP_MODE). An unlock sequence
is required to set the DSEN bit. Once the DSEN bit has
been set, there is no time limit before the SLEEP com-
mand can be executed. The DSEN bit is automatically
cleared when exiting the Deep Sleep mode.
The sequence to enter Deep Sleep mode is:
1. If the application requires the Deep Sleep WDT,
enable it and configure its clock source. For
more information on Deep Sleep WDT, see
Section 10.2.4.5 “Deep Sleep WDT”.
2. If the application requires Deep Sleep BOR,
enable it by programming the DSLPBOR
Configuration bit (FDS<6>).
3. If the application requires wake-up from Deep
Sleep on RTCC alarm, enable and configure the
RTCC module For more information on RTCC,
see Section 19.0 “Real-Time Clock and
Calendar (RTCC)”.
4. If needed, save any critical application context
data by writing it to the DSGPR0 and DSGPR1
registers (optional).
5. Enable Deep Sleep mode by setting the DSEN
bit (DSCON<15>).
6. Enter Deep Sleep mode by issuing a PWRSAV #0
instruction.
Any time the DSEN bit is set, all bits in the DSWAKE
register will be automatically cleared.
To set the DSEN bit, the unlock sequence in
Example 10-2 is required:
EXAMPLE 10-2: THE UNLOCK SEQUENCE
Note: To re-enter Deep Sleep after a Deep Sleep
wake-up, allow a delay of at least 3 TCY
after clearing the RELEASE bit.
Note: An unlock sequence is required to set the
DSEN bit.
//Disable Interrupts For 5 instructions
asm volatile(“disi #5”);
//Issue Unlock Sequence
asm volatile
mov #0x55, W0;
mov W0, NVMKEY;
mov #0xAA, W1;
mov W1, NVMKEY;
bset DSCON, #DSEN
2011-2012 Microchip Technology Inc. DS39995C-page 125
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10.2.4.2 Exiting Deep Sleep Mode
Deep Sleep mode exits on any one of the following events:
• A POR event on VDD supply. If there is no
DSBOR circuit to re-arm the VDD supply POR cir-
cuit, the external VDD supply must be lowered to
the natural arming voltage of the POR circuit.
• A DSWDT time-out. When the DSWDT timer
times out, the device exits Deep Sleep.
• An ARTCC alarm (if RTCEN = 1).
• An assertion (‘0’) of the MCLR pin.
• An assertion of the INT0 pin (if the interrupt was
enabled before Deep Sleep mode was entered).
The polarity configuration is used to determine the
assertion level (‘0’ or ‘1’) of the pin that will cause
an exit from Deep Sleep mode. Exiting from Deep
Sleep mode requires a change on the INT0 pin
while in Deep Sleep mode.
Exiting Deep Sleep mode generally does not retain the
state of the device and is equivalent to a Power-on
Reset (POR) of the device. Exceptions to this include
the RTCC (if present), which remains operational
through the wake-up, the DSGPRx registers and
DSWDT.
Wake-up events that occur after Deep Sleep exits, but
before the POR sequence completes, are ignored and
are not be captured in the DSWAKE register.
The sequence for exiting Deep Sleep mode is:
1. After a wake-up event, the device exits Deep
Sleep and performs a POR. The DSEN bit is
cleared automatically. Code execution resumes
at the Reset vector.
2. To determine if the device exited Deep Sleep,
read the Deep Sleep bit, DPSLP (RCON<10>).
This bit will be set if there was an exit from Deep
Sleep mode; if the bit is set, clear it.
3. Determine the wake-up source by reading the
DSWAKE register.
4. Determine if a DSBOR event occurred during
Deep Sleep mode by reading the DSBOR bit
(DSCON<1>).
5. If application context data has been saved, read
it back from the DSGPR0 and DSGPR1 registers.
6. Clear the RELEASE bit (DSCON<0>).
10.2.4.3 Saving Context Data with the
DSGPR0/DSGPR1 Registers
As exiting Deep Sleep mode causes a POR, most
Special Function Registers reset to their default POR
values. In addition, because VCORE power is not sup-
plied in Deep Sleep mode, information in data RAM
may be lost when exiting this mode.
Applications which require critical data to be saved
prior to Deep Sleep may use the Deep Sleep General
Purpose registers, DSGPR0 and DSGPR1 or data
EEPROM (if available). Unlike other SFRs, the
contents of these registers are preserved while the
device is in Deep Sleep mode. After exiting Deep
Sleep, software can restore the data by reading the
registers and clearing the RELEASE bit (DSCON<0>).
10.2.4.4 I/O Pins During Deep Sleep
During Deep Sleep, the general purpose I/O pins retain
their previous states and the Secondary Oscillator
(SOSC) will remain running, if enabled. Pins that are
configured as inputs (TRISx bit is set), prior to entry into
Deep Sleep, remain high-impedance during Deep
Sleep. Pins that are configured as outputs (TRISx bit is
clear), prior to entry into Deep Sleep, remain as output
pins during Deep Sleep. While in this mode, they
continue to drive the output level determined by their
corresponding LATx bit at the time of entry into Deep
Sleep.
Once the device wakes back up, all I/O pins continue to
maintain their previous states, even after the device
has finished the POR sequence and is executing
application code again. Pins configured as inputs
during Deep Sleep remain high-impedance and pins
configured as outputs continue to drive their previous
value. After waking up, the TRIS and LAT registers,
and the SOSCEN bit (OSCCON<1>) are reset. If
firmware modifies any of these bits or registers, the I/O
will not immediately go to the newly configured states.
Once the firmware clears the RELEASE bit
(DSCON<0>), the I/O pins are “released”. This causes
the I/O pins to take the states configured by their
respective TRISx and LATx bit values.
This means that keeping the SOSC running after
waking up requires the SOSCEN bit to be set before
clearing RELEASE.
If the Deep Sleep BOR (DSBOR) is enabled, and a
DSBOR or a true POR event occurs during Deep
Sleep, the I/O pins will be immediately released, similar
to clearing the RELEASE bit. All previous state
information will be lost, including the general purpose
DSGPR0 and DSGPR1 contents.
If a MCLR Reset event occurs during Deep Sleep, the
DSGPRx, DSCON and DSWAKE registers will remain
valid, and the RELEASE bit will remain set. The state
of the SOSC will also be retained. The I/O pins,
however, will be reset to their MCLR Reset state. Since
RELEASE is still set, changes to the SOSCEN bit
(OSCCON<1>) cannot take effect until the RELEASE
bit is cleared.
In all other Deep Sleep wake-up cases, application
firmware must clear the RELEASE bit in order to
reconfigure the I/O pins.
Note: Any interrupt pending when entering
Deep Sleep mode is cleared.
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DS39995C-page 126 2011-2012 Microchip Technology Inc.
10.2.4.5 Deep Sleep WDT
To enable the DSWDT in Deep Sleep mode, program
the Configuration bit, DSWDTEN (FDS<7>). The
device Watchdog Timer (WDT) need not be enabled for
the DSWDT to function. Entry into Deep Sleep mode
automatically resets the DSWDT.
The DSWDT clock source is selected by the
DSWDTOSC Configuration bit (FDS<4>). The post-
scaler options are programmed by the DSWDTPS<3:0>
Configuration bits (FDS<3:0>). The minimum time-out
period that can be achieved is 2.1 ms and the maximum
is 25.7 days. For more details on the FDS Configuration
register and DSWDT configuration options, refer to
Sect ion 26.0 “Spe ci al Fe atures” .
10.2.4.6 Switching Clocks in Deep Sleep Mode
Both the RTCC and the DSWDT may run from either
SOSC or the LPRC clock source. This allows both the
RTCC and DSWDT to run without requiring both the
LPRC and SOSC to be enabled together, reducing
power consumption.
Running the RTCC from LPRC will result in a loss of
accuracy in the RTCC of approximately 5 to 10%. If a
more accurate RTCC is required, it must be run from
the SOSC clock source. The RTCC clock source is
selected with the RTCOSC Configuration bit (FDS<5>).
Under certain circumstances, it is possible for the
DSWDT clock source to be off when entering Deep
Sleep mode. In this case, the clock source is turned on
automatically (if DSWDT is enabled), without the need
for software intervention. However, this can cause a
delay in the start of the DSWDT counters. In order to
avoid this delay when using SOSC as a clock source,
the application can activate SOSC prior to entering
Deep Sleep mode.
10.2.4.7 Checking and Clearing the Status of
Deep Sleep
Upon entry into Deep Sleep mode, the status bit,
DPSLP (RCON<10>), becomes set and must be
cleared by the software.
On power-up, the software should read this status bit to
determine if the Reset was due to an exit from Deep
Sleep mode and clear the bit if it is set. Of the four
possible combinations of DPSLP and POR bit states,
three cases can be considered:
• Both the DPSLP and POR bits are cleared. In this
case, the Reset was due to some event other
than a Deep Sleep mode exit.
• The DPSLP bit is clear, but the POR bit is set; this
is a normal POR.
• Both the DPSLP and POR bits are set. This
means that Deep Sleep mode was entered, the
device was powered down and Deep Sleep mode
was exited.
10.2.4.8 Power-on Resets (PORs)
VDD voltage is monitored to produce PORs. Since
exiting from Deep Sleep functionally looks like a POR,
the technique described in Section 10.2.4.7 “Checking
and Clearing the Status of Deep Sleep” should be
used to distinguish between Deep Sleep and a true POR
event.
When a true POR occurs, the entire device, including
all Deep Sleep logic (Deep Sleep registers: RTCC,
DSWDT, etc.) is reset.
10.2.4.9 Summary of Deep Sleep Sequence
To review, these are the necessary steps involved in
invoking and exiting Deep Sleep mode:
1. The device exits Reset and begins to execute its
application code.
2. If DSWDT functionality is required, program the
appropriate Configuration bit.
3. Select the appropriate clock(s) for the DSWDT
and RTCC (optional).
4. Enable and configure the DSWDT (optional).
5. Enable and configure the RTCC (optional).
6. Write context data to the DSGPRx registers
(optional).
7. Enable the INT0 interrupt (optional).
8. Set the DSEN bit in the DSCON register.
9. Enter Deep Sleep by issuing a PWRSV
#SLEEP_MODE command.
10. The device exits Deep Sleep when a wake-up
event occurs.
11. The DSEN bit is automatically cleared.
12. Read and clear the DPSLP status bit in RCON,
and the DSWAKE status bits.
13. Read the DSGPRx registers (optional).
14. Once all state related configurations are
complete, clear the RELEASE bit.
15. The application resumes normal operation.
2011-2012 Microchip Technology Inc. DS39995C-page 127
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REGISTER 10-1: DSCON: DEEP SLEEP CONTROL REGISTER(1)
R/W-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0
DSEN — — — — — —RTCCWDIS
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/C-0, HS
— — — — — ULPWUDIS DSBOR(2)RELEASE
bit 7 bit 0
Legend: C = Clearable bit HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 DSEN: Deep Sleep Enable bit
1 = Enters Deep Sleep on execution of PWRSAV #0
0 = Enters normal Sleep on execution of PWRSAV #0
bit 14-9 Unimplemented: Read as ‘0’
bit 8 RTCCWDIS: RTCC Wake-up Disable bit
1 = Wake-up from Deep Sleep with RTCC is disabled
0 = Wake-up from Deep Sleep with RTCC is enabled
bit 7-3 Unimplemented: Read as ‘0’
bit 2 ULPWUDIS: ULPWU Wake-up Disable bit
1 = Wake-up from Deep Sleep with ULPWU is disabled
0 = Wake-up from Deep Sleep with ULPWU is enabled
bit 1 DSBOR: Deep Sleep BOR Event bit(2)
1 = The DSBOR was active and a BOR event was detected during Deep Sleep
0 = The DSBOR was not active, or was active but did not detect a BOR event during Deep Sleep
bit 0 RELEASE: I/O Pin State Release bit
1 = Upon waking from Deep Sleep, I/O pins maintain their previous states to Deep Sleep entry
0 = Release I/O pins from their state previous to Deep Sleep entry, and allow their respective TRISx and
LATx bits to control their states
Note 1: All register bits are only reset in the case of a POR event outside of Deep Sleep mode.
2: Unlike all other events, a Deep Sleep BOR event will NOT cause a wake-up from Deep Sleep; this re-arms
POR.
PIC24FV32KA304 FAMILY
DS39995C-page 128 2011-2012 Microchip Technology Inc.
REGISTER 10-2: DSWAKE: DEEP SLEEP WAKE-UP SOURCE REGISTER(1)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0, HS
— — — — — — —DSINT0
bit 15 bit 8
R/W-0, HS U-0 U-0 R/W-0, HS R/W-0, HS R/W-0, HS U-0 R/W-0, HS
DSFLT —— DSWDT DSRTCC DSMCLR — DSPOR(2,3)
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-9 Unimplemented: Read as ‘0’
bit 8 DSINT0: Interrupt-on-Change bit
1 = Interrupt-on-change was asserted during Deep Sleep
0 = Interrupt-on-change was not asserted during Deep Sleep
bit 7 DSFLT: Deep Sleep Fault Detect bit
1 = A Fault occurred during Deep Sleep and some Deep Sleep configuration settings may have been
corrupted
0 = No Fault was detected during Deep Sleep
bit 6-5 Unimplemented: Read as ‘0’
bit 4 DSWDT: Deep Sleep Watchdog Timer Time-out bit
1 = The Deep Sleep Watchdog Timer timed out during Deep Sleep
0 = The Deep Sleep Watchdog Timer did not time out during Deep Sleep
bit 3 DSRTCC: Real-Time Clock and Calendar (RTCC) Alarm bit
1 = The Real-Time Clock and Calendar triggered an alarm during Deep Sleep
0 = The Real-Time Clock and Calendar did not trigger an alarm during Deep Sleep
bit 2 DSMCLR: MCLR Event bit
1 = The MCLR pin was active and was asserted during Deep Sleep
0 = The MCLR pin was not active, or was active, but not asserted during Deep Sleep
bit 1 Unimplemented: Read as ‘0’
bit 0 DSPOR: Power-on Reset Event bit((2,3))
1 = The VDD supply POR circuit was active and a POR event was detected
0 = The VDD supply POR circuit was not active, or was active but did not detect a POR event
Note 1: All register bits are cleared when the DSEN (DSCON<15>) bit is set.
2: All register bits are reset only in the case of a POR event outside of Deep Sleep mode, except bit,
DSPOR, which does not reset on a POR event that is caused due to a Deep Sleep exit.
3: Unlike the other bits in this register, this bit can be set outside of Deep Sleep.
2011-2012 Microchip Technology Inc. DS39995C-page 129
PIC24FV32KA304 FAMILY
10.3 Ultra Low-Power Wake-up
The Ultra Low-Power Wake-up (ULPWU) on pin, RB0,
allows a slow falling voltage to generate an interrupt
without excess current consumption.
To use this feature:
1. Charge the capacitor on RB0 by configuring the
RB0 pin to an output and setting it to ‘1’.
2. Stop charging the capacitor by configuring RB0
as an input.
3. Discharge the capacitor by setting the ULPEN
and ULPSINK bits in the ULPWCON register.
4. Configure Sleep mode.
5. Enter Sleep mode.
When the voltage on RB0 drops below VIL, the device
wakes up and executes the next instruction.
This feature provides a low-power technique for
periodically waking up the device from Sleep mode.
The time-out is dependent on the discharge time of the
RC circuit on RB0.
When the ULPWU module wakes the device from
Sleep mode, the ULPWUIF bit (IFS5<0>) is set. Soft-
ware can check this bit upon wake-up to determine the
wake-up source.
See Example 10-3 for initializing the ULPWU module
EXAMPLE 10-3: ULTRA LOW-POWER
WAKE-UP INITIALIZATION
A series resistor, between RB0 and the external
capacitor, provides overcurrent protection for the
RB0/AN0/ULPWU pin and enables software calibration
of the time-out (see Figure 10-1).
FIGURE 10-1: SERIAL RESISTOR
A timer can be used to measure the charge time and
discharge time of the capacitor. The charge time can
then be adjusted to provide the desired delay in Sleep.
This technique compensates for the affects of temper-
ature, voltage and component accuracy. The peripheral
can also be configured as a simple, programmable
Low-Voltage Detect (LVD) or temperature sensor.
//*******************************
// 1. Charge the capacitor on RB0
//*******************************
TRISBbits.TRISB0 = 0;
LATBbits.LATB0 = 1;
for(i = 0; i < 10000; i++) Nop();
//*****************************
//2. Stop Charging the capacitor
// on RB0
//*****************************
TRISBbits.TRISB0 = 1;
//*****************************
//3. Enable ULPWU Interrupt
//*****************************
IFS5bits.ULPWUIF = 0;
IEC5bits.ULPWUIE = 1;
IPC21bits.ULPWUIP = 0x7;
//*****************************
//4. Enable the Ultra Low Power
// Wakeup module and allow
// capacitor discharge
//*****************************
ULPWCONbits.ULPEN = 1;
ULPWCONbit.ULPSINK = 1;
//*****************************
//5. Enter Sleep Mode
//*****************************
Sleep();
//for sleep, execution will
//resume here
R1
C1
RB0
PIC24FV32KA304 FAMILY
DS39995C-page 130 2011-2012 Microchip Technology Inc.
REGISTER 10-3: ULPWCON: ULPWU CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 U-0 U-0 R/W-0
ULPEN —ULPSIDL — — — — ULPSINK
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ULPEN: ULPWU Module Enable bit
1 = Module is enabled
0 = Module is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 ULPSIDL: ULPWU Stop in Idle Select bit
1 = Discontinues module operation when the device enters Idle mode
0 = Continues module operation in Idle mode
bit 12-9 Unimplemented: Read as ‘0’
bit 8 ULPSINK: ULPWU Current Sink Enable bit
1 = Current sink is enabled
0 = Current sink is disabled
bit 7-0 Unimplemented: Read as ‘0’
2011-2012 Microchip Technology Inc. DS39995C-page 131
PIC24FV32KA304 FAMILY
10.4 Voltage Regulator-Based
Power-Saving Features
The PIC24FV32KA304 series devices have a voltage
regulator that has the ability to alter functionality to
provide power savings. The on-board regulator is made
up of two basic modules: the High-Voltage Regulator
(HVREG) and the Low-Voltage Regulator (LVREG).
With the combination of HVREG and LVREG, the
following power modes are available:
10.4.1 RUN MODE
In Run mode, the main HVREG is providing a regulated
voltage with enough current to supply a device running
at full speed, and the device is not in Sleep or Deep
Sleep Mode. The LVREG may or may not be running,
but is unused.
10.4.2 FAST WAKE-UP SLEEP MODE
In Fast Wake-up Sleep mode, the device is in Sleep,
but the main HVREG is still providing the regulated
voltage at full supply current. This mode consumes the
most power in Sleep, but provides the fastest wake-up
from Sleep.
10.4.3 SLEEP (STANDBY) MODE
In Sleep mode, the device is in Sleep and the main
HVREG is providing a regulated voltage at a reduced
(standby) supply current. This mode provides for
limited functionality due to the reduced supply current.
It consumes less power than Fast Wake-up Sleep
mode, but requires a longer time to wake-up from
Sleep.
10.4.4 LOW-VOLTAGE SLEEP MODE
In Low-Voltage Sleep mode, the device is in Sleep and
all regulated voltage is provided solely by the LVREG.
Consequently, this mode provides the lowest Sleep
power consumption, but is also the most limited in
terms of how much functionality can be enabled while
in this mode. The low-voltage Sleep wake-up time is
longer than Sleep mode due to the extra time required
to raise the VCORE supply rail back to normal regulated
levels.
10.4.5 DEEP SLEEP MODE
In Deep Sleep mode, both the main HVREG and
LVREG are shut down, providing the lowest possible
device power consumption. However, this mode
provides no retention or functionality of the device and
has the longest wake-up time.
Note: The PIC24F32KA30X family devices do
not have any internal voltage regulation,
and therefore, do not support
Low-Voltage Sleep mode.
PIC24FV32KA304 FAMILY
DS39995C-page 132 2011-2012 Microchip Technology Inc.
TABLE 10-1: VOLTAGE REGULATION CONFIGURATION SETTINGS FOR
PIC24FV32KA304 DEVICES
LVRCFG Bit
(FPOR<2>) LVREN Bit
(RCON<12> PMSLP Bit
(RCON<8>) Power Mode
During Sleep Description
001Fast Wake-up HVREG mode (normal) is unchanged during Sleep.
Sleep LVREG is unused.
000Sleep HVREG goes to Low-Power Standby mode during
Sleep.
(Standby) LVREG is unused.
010Low Voltage HVREG is off during Sleep
Sleep LVREG is enabled and provides Sleep voltage
regulation.
1X1Fast Wake-up HVREG mode (normal) is unchanged during Sleep.
Sleep LVREG is disabled at all times.
1X0Sleep HVREG goes to Low-Power Standby mode during
Sleep.
(Standby) LVREG is disabled at all times
2011-2012 Microchip Technology Inc. DS39995C-page 133
PIC24FV32KA304 FAMILY
10.5 Doze Mode
Generally, changing clock speed and invoking one of
the power-saving modes are the preferred strategies
for reducing power consumption. There may be
circumstances, however, where this is not practical. For
example, it may be necessary for an application to
maintain uninterrupted synchronous communication,
even while it is doing nothing else. Reducing system
clock speed may introduce communication errors,
while using a power-saving mode may stop
communications completely.
Doze mode is a simple and effective alternative method
to reduce power consumption while the device is still
executing code. In this mode, the system clock
continues to operate from the same source and at the
same speed. Peripheral modules continue to be
clocked at the same speed, while the CPU clock speed
is reduced. Synchronization between the two clock
domains is maintained, allowing the peripherals to
access the SFRs while the CPU executes code at a
slower rate.
Doze mode is enabled by setting the DOZEN bit
(CLKDIV<11>). The ratio between peripheral and core
clock speed is determined by the DOZE<2:0> bits
(CLKDIV<14:12>). There are eight possible
configurations, from 1:1 to 1:128, with 1:1 being the
default.
It is also possible to use Doze mode to selectively reduce
power consumption in event driven applications. This
allows clock-sensitive functions, such as synchronous
communications, to continue without interruption. Mean-
while, the CPU Idles, waiting for something to invoke an
interrupt routine. Enabling the automatic return to
full-speed CPU operation on interrupts is enabled by
setting the ROI bit (CLKDIV<15>). By default, interrupt
events have no effect on Doze mode operation.
10.6 Selective Peripheral Module
Control
Idle and Doze modes allow users to substantially
reduce power consumption by slowing or stopping the
CPU clock. Even so, peripheral modules still remain
clocked, and thus, consume power. There may be
cases where the application needs what these modes
do not provide: the allocation of power resources to
CPU processing, with minimal power consumption
from the peripherals.
PIC24F devices address this requirement by allowing
peripheral modules to be selectively disabled, reducing
or eliminating their power consumption. This can be
done with two control bits:
• The Peripheral Enable bit, generically named,
“XXXEN”, located in the module’s main control
SFR.
• The Peripheral Module Disable (PMD) bit,
generically named, “XXXMD”, located in one of
the PMD Control registers.
Both bits have similar functions in enabling or disabling
its associated module. Setting the PMDx bits for a mod-
ule disables all clock sources to that module, reducing
its power consumption to an absolute minimum. In this
state, the control and status registers associated with
the peripheral will also be disabled, so writes to those
registers will have no effect, and read values will be
invalid. Many peripheral modules have a corresponding
PMDx bit.
In contrast, disabling a module by clearing its XXXEN
bit, disables its functionality, but leaves its registers
available to be read and written to. Power consumption
is reduced, but not by as much as the PMDx bits are
used. Most peripheral modules have an enable bit;
exceptions include capture, compare and RTCC.
To achieve more selective power savings, peripheral
modules can also be selectively disabled when the
device enters Idle mode. This is done through the control
bit of the generic name format, “XXXIDL”. By default, all
modules that can operate during Idle mode will do so.
Using the disable on Idle feature disables the module
while in Idle mode, allowing further reduction of power
consumption during Idle mode, enhancing power
savings for extremely critical power applications.
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DS39995C-page 134 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 135
PIC24FV32KA304 FAMILY
11.0 I/O PORTS
All of the device pins (except VDD and VSS) are shared
between the peripherals and the parallel I/O ports. All
I/O input ports feature Schmitt Trigger inputs for
improved noise immunity.
11 .1 Parallel I/O (P I O ) P o rts
A parallel I/O port that shares a pin with a peripheral is,
in general, subservient to the peripheral. The
peripheral’s output buffer data and control signals are
provided to a pair of multiplexers. The multiplexers
select whether the peripheral or the associated port
has ownership of the output data and control signals of
the I/O pin. The logic also prevents “loop through”, in
which a port’s digital output can drive the input of a
peripheral that shares the same pin. Figure 11-1
illustrates how ports are shared with other peripherals
and the associated I/O pin to which they are connected.
When a peripheral is enabled and the peripheral is
actively driving an associated pin, the use of the pin as
a general purpose output pin is disabled. The I/O pin
may be read, but the output driver for the parallel port
bit will be disabled. If a peripheral is enabled, but the
peripheral is not actively driving a pin, that pin may be
driven by a port.
All port pins have three registers directly associated
with their operation as digital I/O. The Data Direction
register (TRISx) determines whether the pin is an input
or an output. If the data direction bit is a ‘1’, then the pin
is an input. All port pins are defined as inputs after a
Reset. Reads from the Data Latch register (LAT), read
the latch. Writes to the latch, write the latch. Reads
from the port (PORT), read the port pins; writes to the
port pins, write the latch.
Any bit and its associated data and control registers
that are not valid for a particular device will be
disabled. That means the corresponding LATx and
TRISx registers, and the port pin will read as zeros.
When a pin is shared with another peripheral or
function that is defined as an input only, it is
nevertheless regarded as a dedicated port because
there is no other competing source of outputs.
FIGURE 11-1: BLOCK DIAGRAM OF A TYPICAL SHARED PORT STRUCTURE
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the I/O
Ports, refer to the “PIC24F Family
Reference Manual”, Section 12. “I/O
Ports with Peripheral Pin Select
(PPS)” (DS39711). Note that the
PIC24FV32KA304 family devices do not
support Peripheral Pin Select features.
Note: The I/O pins retain their state during Deep
Sleep. They will retain this state at
wake-up until the software restore bit
(RELEASE) is cleared.
QD
CK
WR LAT +
TRIS Latch
I/O Pin
WR PORT
Data Bus
QD
CK
Data Latch
Read PORT
Read TRIS
1
0
1
0
WR TRIS
Peripheral Output Data
Peripheral Input Data
I/O
Periph er al Mo du le
Peripheral Output Enable
PIO Module
Output Multiplexers
Output Data
Input Data
Peripheral Module Enable
Read LAT
Output Enable
PIC24FV32KA304 FAMILY
DS39995C-page 136 2011-2012 Microchip Technology Inc.
11.1.1 OPEN-DRAIN CONFIGURATION
In addition to the PORT, LAT and TRIS registers for
data control, each port pin can also be individually
configured for either digital or open-drain output. This is
controlled by the Open-Drain Control register, ODCx,
associated with each port. Setting any of the bits
configures the corresponding pin to act as an
open-drain output.
The maximum open-drain voltage allowed is the same
as the maximum VIH specification.
11.2 Configuring Analog Port Pins
The use of the ANS and TRIS registers control the
operation of the A/D port pins. The port pins that are
desired as analog inputs must have their correspond-
ing TRISx bit set (input). If the TRISx bit is cleared
(output), the digital output level (VOH or VOL) will be
converted.
When reading the PORT register, all pins configured as
analog input channels will read as cleared (a low level).
Analog levels on any pin that is defined as a digital
input (including the ANx pins) may cause the input
buffer to consume current that exceeds the device
specifications.
11.2.1 ANALOG SELECTION REGISTER
I/O pins with shared analog functionality, such as A/D
inputs and comparator inputs, must have their digital
inputs shut off when analog functionality is used. Note
that analog functionality includes an analog voltage
being applied to the pin externally.
To allow for analog control, the ANSx registers are
provided. There is one ANS register for each port
(ANSA, ANSB and ANSC). Within each ANSx register,
there is a bit for each pin that shares analog
functionality with the digital I/O functionality.
If a particular pin does not have an analog function, that
bit is unimplemented. See Register 11-1 to Register 11-3
for implementation.
REGISTER 11-1: ANSA: ANALOG SELECTION (PORTA)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1
———— ANSA3 ANSA2 ANSA1 ANSA0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-4 Unimplemented: Read as ‘0’
bit 3-0 ANSA<3:0>: Analog Select Control bits
1 = Digital input buffer is not active (use for analog input)
0 = Digital input buffer is active
2011-2012 Microchip Technology Inc. DS39995C-page 137
PIC24FV32KA304 FAMILY
REGISTER 11-2: ANSB: ANALOG SELECTION (PORTB)
R/W-1 R/W-1 R/W-1 R/W-1 U-0 U-0 U-0 U-0
ANSB15 ANSB14 ANSB13 ANSB12 — — — —
bit 15 bit 8
U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
— — — ANSB4 ANSB3(1)ANSB2 ANSB1 ANSB0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-12 ANSB<15:12>: Analog Select Control bits
1 = Digital input buffer is not active (use for analog input)
0 = Digital input buffer is active
bit 11-5 Unimplemented: Read as ‘0’
bit 4-0 ANSB<4:0>: Analog Select Control bits(1)
1 = Digital input buffer is not active (use for analog input)
0 = Digital input buffer is active
Note 1: The ANSB3 bit is not available on 20-pin devices.
REGISTER 11-3: ANSC ANALOG SELECTION (PORTC)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R/W-1 R/W-1 R/W-1
— — — — — ANSC2(1)ANSC1(1)ANSC0(1)
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-3 Unimplemented: Read as ‘0’
bit 2-0 ANSC<2:0>: Analog Select Control bits(1)
1 = Digital input buffer is not active (use for analog input)
0 = Digital input buffer is active
Note 1: These bits are not available on 20-pin or 28-pin devices.
PIC24FV32KA304 FAMILY
DS39995C-page 138 2011-2012 Microchip Technology Inc.
11.2.2 I/O PORT WRITE/READ TIMING
One instruction cycle is required between a port
direction change or port write operation and a read
operation of the same port. Typically, this instruction
would be a NOP.
11.3 Input Change Notification
The input change notification function of the I/O ports
allows the PIC24FV32KA304 family of devices to
generate interrupt requests to the processor in
response to a Change-of-State (COS) on selected
input pins. This feature is capable of detecting input
change of states, even in Sleep mode, when the clocks
are disabled. Depending on the device pin count, there
are up to 23 external signals (CN0 through CN22) that
may be selected (enabled) for generating an interrupt
request on a Change-of-State.
There are six control registers associated with the CN
module. The CNEN1 and CNEN2 registers contain the
interrupt enable control bits for each of the CN input
pins. Setting any of these bits enables a CN interrupt
for the corresponding pins.
Each CN pin also has a weak pull-up/pull-down
connected to it. The pull-ups act as a current source
that is connected to the pin. The pull-downs act as a
current sink to eliminate the need for external resistors
when push button or keypad devices are connected.
On any pin, only the pull-up resistor or the pull-down
resistor should be enabled, but not both of them. If the
push button or the keypad is connected to VDD, enable
the pull-down, or if they are connected to VSS, enable
the pull-up resistors. The pull-ups are enabled
separately, using the CNPU1 and CNPU2 registers,
which contain the control bits for each of the CN pins.
Setting any of the control bits enables the weak
pull-ups for the corresponding pins. The pull-downs are
enabled separately, using the CNPD1 and CNPD2
registers, which contain the control bits for each of the
CN pins. Setting any of the control bits enables the
weak pull-downs for the corresponding pins.
When the internal pull-up is selected, the pin uses VDD
as the pull-up source voltage. When the internal
pull-down is selected, the pins are pulled down to VSS
by an internal resistor. Make sure that there is no
external pull-up source/pull-down sink when the
internal pull-ups/pull-downs are enabled.
EXAMPLE 11-1: PORT WRITE/READ EXAMPLE
Note: Pull-ups and pull-downs on change notifi-
cation pins should always be disabled
whenever the port pin is configured as a
digital output.
MOV 0xFF00, W0; //Configure PORTB<15:8> as inp uts and PORTB< 7:0> as output s
MOV W0, TRISB;
NOP; //Delay 1 cycle
BTSS PORTB, #1 3; //Next Instruction
Equivalent ‘C’ C ode
TRISB = 0xFF00; //Configure PORT B<15:8> as inp uts and PORTB< 7:0> as output s
NOP(); //Delay 1 cycle
if(PORTBbits.RB1 3 == 1) // execute following co de if P ORTB pi n 13 is set.
{
}
2011-2012 Microchip Technology Inc. DS39995C-page 139
PIC24FV32KA304 FAMILY
12.0 TIMER1
The Timer1 module is a 16-bit timer which can serve as
the time counter for the Real-Time Clock (RTC) or
operate as a free-running, interval timer/counter. Timer1
can operate in three modes:
•16-Bit Timer
• 16-Bit Synchronous Counter
• 16-Bit Asynchronous Counter
Timer1 also supports these features:
• Timer Gate Operation
• Selectable Prescaler Settings
• Timer Operation During CPU Idle and Sleep
modes
• Interrupt on 16-bit Period Register Match or
Falling Edge of External Gate Signal
Figure 12-1 illustrates a block diagram of the 16-bit
Timer1 module.
To configure Timer1 for operation:
1. Set the TON bit (= 1).
2. Select the timer prescaler ratio using the
TCKPS<1:0> bits.
3. Set the Clock and Gating modes using the TCS
and TGATE bits.
4. Set or clear the TSYNC bit to configure
synchronous or asynchronous operation.
5. Load the timer period value into the PR1
register.
6. If interrupts are required, set the Timer1 Interrupt
Enable bit, T1IE. Use the Timer1 Interrupt Priority
bits, T1IP<2:0>, to set the interrupt priority.
FIGURE 12-1: 16-BIT TIMER1 MODULE BLOCK DIAGRAM
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on
Timers, refer to the “PIC2 4F Family Refer-
ence Manual”, Section 14. “Timers”
(DS39704).
TON
Sync
SOSCI
SOSCO
PR1
Set T1IF
Equal
Reset
SOSCEN
TSYNC
Q
QD
CK
TCKPS<1:0>
Prescaler
1, 8, 64, 256
2
TGATE
F
OSC
/2
TCS
TGATE
T1CK
T1ECS<1:0>
LPRC
Comparator
TMR1
Gate
Sync
PIC24FV32KA304 FAMILY
DS39995C-page 140 2011-2012 Microchip Technology Inc.
REGISTER 12-1: T1CON: TIMER1 CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 U-0 R/W-0 R/W-0
TON —TSIDL— — —T1ECS1
(1)T1ECS0(1)
bit 15 bit 8
U-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 U-0
— TGATE TCKPS1 TCKPS0 —TSYNCTCS —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 TON: Timer1 On bit
1 = Starts 16-bit Timer1
0 = Stops 16-bit Timer1
bit 14 Unimplemented: Read as ‘0’
bit 13 TSIDL: Stop in Idle Mode bit
1 = Discontinues module operation when device enters Idle mode
0 = Continues module operation in Idle mode
bit 12-10 Unimplemented: Read as ‘0’
bit 9-8 T1ECS<1:0>: Timer1 Extended Clock Select bits(1)
11 = Reserved; do not use
10 = Timer1 uses the LPRC as the clock source
01 = Timer1 uses the External Clock from T1CK
00 = Timer1 uses the Secondary Oscillator (SOSC) as the clock source
bit 7 Unimplemented: Read as ‘0’
bit 6 TGATE: Timer1 Gated Time Accumulation Enable bit
When TCS = 1:
This bit is ignored.
When TCS = 0:
1 = Gated time accumulation is enabled
0 = Gated time accumulation is disabled
bit 5-4 TCKPS<1:0>: Timer1 Input Clock Prescale Select bits
11 = 1:256
10 = 1:64
01 = 1:8
00 = 1:1
bit 3 Unimplemented: Read as ‘0’
bit 2 TSYNC: Timer1 External Clock Input Synchronization Select bit
When TCS = 1:
1 = Synchronizes external clock input
0 = Does not synchronize external clock input
When TCS = 0:
This bit is ignored.
bit 1 TCS: Timer1 Clock Source Select bit
1 = Timer1 clock source is selected by T1ECS<1:0>
0 = Internal clock (FOSC/2)
bit 0 Unimplemented: Read as ‘0’
Note 1: The T1ECSx bits are valid only when TCS = 1.
2011-2012 Microchip Technology Inc. DS39995C-page 141
PIC24FV32KA304 FAMILY
13.0 TIMER2/3 AND TIMER4/5
The Timer2/3 and Timer4/5 modules are 32-bit timers,
which can also be configured as four independent,16-bit
timers with selectable operating modes.
As a 32-bit timer, Timer2/3 or Timer4/5 operate in three
modes:
• Two independent 16-bit timers (Timer2 and
Timer3) with all 16-bit operating modes (except
Asynchronous Counter mode)
• Single 32-bit timer
• Single 32-bit synchronous counter
They also support these features:
• Timer gate operation
• Selectable prescaler settings
• Timer operation during Idle mode
• Interrupt on a 32-bit Period register match
• A/D event trigger
Individually, all four of the 16-bit timers can function as
synchronous timers or counters. They also offer the
features listed above, except for the A/D event trigger
(this is implemented only with Timer3). The operating
modes and enabled features are determined by setting
the appropriate bit(s) in the T2CON, T3CON, T4CON
and T5CON registers. The T2CON,T3CON, T4CON
and T5CON registers are provided in generic form in
Register 13-1 and Register 13-2, respectively.
For 32-bit timer/counter operation, Timer2/Timer4 is
the least significant word (lsw) and Timer3/Timer5 is
the most significant word (msw) of the 32-bit timer.
To configure Timer2/3 or Timer4/5 for 32-bit operation:
1. Set the T32 bit (T2CON<3> or T4CON<3> = 1).
2. Select the prescaler ratio for Timer2 or Timer4
using the TCKPS<1:0> bits.
3. Set the Clock and Gating modes using the TCS
and TGATE bits.
4. Load the timer period value. PR3 (or PR5) will
contain the most significant word of the value,
while PR2 (or PR4) contains the least significant
word.
5. If interrupts are required, set the Timerx Interrupt
Enable bit, TxIE. Use the Timerx Interrupt Priority
bits, TxIP<2:0>, to set the interrupt priority.
6. Set the TON bit (TxCON<15> = 1).
The timer value, at any point, is stored in the register
pair, TMR3:TMR2 (or TMR5:TMR4). TMR3 (TMR5)
always contains the most significant word of the count,
while TMR2 (TMR4) contains the least significant word.
To configure any of the timers for individual 16-bit
operation:
1. Clear the T32 bit corresponding to that timer
(T2CON<3> for Timer2 and Timer3 or
T4CON<3> for Timer4 and Timer5).
2. Select the timer prescaler ratio using the
TCKPS<1:0> bits.
3. Set the Clock and Gating modes using the TCS
and TGATE bits.
4. Load the timer period value into the PRx
register.
5. If interrupts are required, set the Timerx Interrupt
Enable bit, TxIE; use the Timer1 Interrupt Priority
bits, TxIP<2:0>, to set the interrupt priority.
6. Set the TON bit (TxCON<15> = 1).
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on Timers,
refer to the “PIC24F Family Reference
Manual”, Section 14. “Timers” (DS39704).
Note: For 32-bit operation, T3CON or T5CON
control bits are ignored. Only T2CON or
T4CON control bits are used for setup and
control. Timer2 or Timer4 clock and gate
inputs are utilized for the 32-bit timer
modules, but an interrupt is generated with
the Timer3 or Timer5 interrupt flags.
PIC24FV32KA304 FAMILY
DS39995C-page 142 2011-2012 Microchip Technology Inc.
FIGURE 13-1: TIMER2/3 AND TIMER4/5 (32-BIT) BLOCK DIAGRAM
TMR3 TMR2
Set T3IF (T5IF)
Equal Comparator
PR3 PR2
Reset
LSBMSB
Note 1: The 32-Bit Timer Configuration bit, T32, must be set for 32-bit timer/counter operation. All control bits are
respective to the T2CON and T4CON registers.
2: The A/D event trigger is available only on Timer2/3 and Timer4/5 in 32-bit mode, and Timer3 and Timer5 in
16-bit mode.
Data Bus<15:0>
TMR3HLD
Read TMR2 (TMR4)(1)
Write TMR2 (TMR4)(1)
16
16
16
Q
QD
CK
TGATE
0
1
TON
TCKPS<1:0>
2
TCY
TCS
TGATE
T2CK
Sync
A/D Event Trigger(2)
(T4CK)
(PR5) (PR4)
(TMR5HLD)
(TMR5) (TMR4)
Prescaler
1, 8, 64, 256
Gate
Sync
2011-2012 Microchip Technology Inc. DS39995C-page 143
PIC24FV32KA304 FAMILY
FIGU RE 13-2: TI ME R 2 AN D TI MER 4 ( 1 6- B IT S Y NC HR ONO US ) BLO C K DI AGR AM
FIGURE 13-3: TIMER3 AND TIMER5 (16-BIT ASYNCHRONOUS) BLOCK DIAGRAM
TON
TCKPS<1:0>
Prescaler
1, 8, 64, 256
2
TCY TCS
TGATE
Gate
T2CK
Sync
PR2 (PR4)
Set T2IF (T4IF)
Equal Comparator
TMR2 (TMR4)
Reset
Q
QD
CK
TGATE
1
0
(T4CK)
Sync
TON
TCKPS<1:0>
2
TCY TCS
TGATE
T3CK
PR3 (PR5)
Set T3IF (T5IF)
Equal Comparator
TMR3 (TMR5)
Reset
TGATE
1
0
A/D Event Trigger
(T5CK)
Prescaler
1, 8, 64, 256
Sync
Q
QD
CK
PIC24FV32KA304 FAMILY
DS39995C-page 144 2011-2012 Microchip Technology Inc.
REGISTER 13-1: TxCON: TIMER2 AND TIMER4 CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 U-0 U-0 U-0
TON —TSIDL—————
bit 15 bit 8
U-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 U-0
— TGATE TCKPS1 TCKPS0 T32(1)—TCS—
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 TON: Timer2 On bit
When TxCON<3> = 1:
1 = Starts 32-bit Timerx/y
0 = Stops 32-bit Timerx/y
When TxCON<3> = 0:
1 = Starts 16-bit Timerx
0 = Stops 16-bit Timerx
bit 14 Unimplemented: Read as ‘0’
bit 13 TSIDL: Stop in Idle Mode bit
1 = Discontinues module operation when device enters Idle mode
0 = Continues module operation in Idle mode
bit 12-7 Unimplemented: Read as ‘0’
bit 6 TGATE: Timerx Gated Time Accumulation Enable bit
When TCS = 1:
This bit is ignored.
When TCS = 0:
1 = Gated time accumulation is enabled
0 = Gated time accumulation is disabled
bit 5-4 TCKPS<1:0>: Timerx Input Clock Prescale Select bits
11 = 1:256
10 = 1:64
01 = 1:8
00 = 1:1
bit 3 T32: 32-Bit Timer Mode Select bit(1)
1 = Timer2 and Timer3 or Timer4 and Timer5 form a single 32-bit timer
0 = Timer2 and Timer3 or Timer4 and Timer5 act as two 16-bit timers
bit 2 Unimplemented: Read as ‘0’
bit 1 TCS: Timerx Clock Source Select bit
1 = External clock from pin, TxCK (on the rising edge)
0 = Internal clock (FOSC/2)
bit 0 Unimplemented: Read as ‘0’
Note 1: In 32-bit mode, the T3CON or T5CON control bits do not affect 32-bit timer operation.
2011-2012 Microchip Technology Inc. DS39995C-page 145
PIC24FV32KA304 FAMILY
REGISTER 13-2: TyCON: TIMER3 AND TIMER5 CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 U-0 U-0 U-0
TON(1)—TSIDL
(1)—————
bit 15 bit 8
U-0 R/W-0 R/W-0 R/W-0 U-0 U-0 R/W-0 U-0
—TGATE
(1)TCKPS1(1)TCKPS0(1)——TCS
(1)—
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 TON: Timery On bit(1)
1 = Starts 16-bit Timery
0 = Stops 16-bit Timery
bit 14 Unimplemented: Read as ‘0’
bit 13 TSIDL: Stop in Idle Mode bit(1)
1 = Discontinues module operation when device enters Idle mode
0 = Continues module operation in Idle mode
bit 12-7 Unimplemented: Read as ‘0’
bit 6 TGATE: Timery Gated Time Accumulation Enable bit(1)
When TCS = 1:
This bit is ignored.
When TCS = 0:
1 = Gated time accumulation is enabled
0 = Gated time accumulation is disabled
bit 5-4 TCKPS<1:0>: Timery Input Clock Prescale Select bits(1)
11 = 1:256
10 = 1:64
01 = 1:8
00 = 1:1
bit 3-2 Unimplemented: Read as ‘0’
bit 1 TCS: Timery Clock Source Select bit(1)
1 = External clock is from the T3CK pin (on the rising edge)
0 = Internal clock (FOSC/2)
bit 0 Unimplemented: Read as ‘0’
Note 1: When 32-bit operation is enabled (TxCON<3> = 1), these bits have no effect on Timery operation. All timer
functions are set through the TxCON register.
PIC24FV32KA304 FAMILY
DS39995C-page 146 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 147
PIC24FV32KA304 FAMILY
14.0 INPUT CAPTURE WITH
DEDICATED TIMERS
All devices in the PIC24FV32KA304 family feature
three independent input capture modules. Each of the
modules offers a wide range of configuration and
operating options for capturing external pulse events,
and generating interrupts.
Key features of the input capture module include:
• Hardware-configurable for 32-bit operation in all
modes by cascading two adjacent modules
• Synchronous and Trigger modes of output
compare operation, with up to 20 user-selectable
Sync/trigger sources available
• A 4-level FIFO buffer for capturing and holding
timer values for several events
• Configurable interrupt generation
• Up to 6 clock sources available for each module,
driving a separate internal 16-bit counter
The module is controlled through two registers: ICxCON1
(Register 14-1) and ICxCON2 (Register 14-2). A general
block diagram of the module is shown in Figure 14-1.
14.1 General Operating Modes
14.1.1 SYNCHRONOUS AND TRIGGER
MODES
By default, the input capture module operates in a
Free-Running mode. The internal 16-bit counter,
ICxTMR, counts up continuously, wrapping around
from FFFFh to 0000h on each overflow, with its period
synchronized to the selected external clock source.
When a capture event occurs, the current 16-bit value
of the internal counter is written to the FIFO buffer.
In Synchronous mode, the module begins capturing
events on the ICx pin as soon as its selected clock
source is enabled. Whenever an event occurs on the
selected Sync source, the internal counter is reset. In
Trigger mode, the module waits for a Sync event from
another internal module to occur before allowing the
internal counter to run.
Standard, free-running operation is selected by setting
the SYNCSELx bits to ‘00000’ and clearing the ICTRIG
bit (ICxCON2<7>). Synchronous and Trigger modes
are selected any time the SYNCSELx bits are set to
any value except ‘00000’. The ICTRIG bit selects
either Synchronous or Trigger mode; setting the bit
selects Trigger mode operation. In both modes, the
SYNCSELx bits determine the Sync/trigger source.
When the SYNCSELx bits are set to ‘00000’ and
ICTRIG is set, the module operates in Software Trigger
mode. In this case, capture operations are started by
manually setting the TRIGSTAT bit (ICxCON2<6>).
FIGURE 14-1: INPUT CAPTURE x BLOCK DIAGRAM
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is
not intended to be a comprehensive
reference source. For more information,
refer to the “PIC24F Family Reference
Manual”, Section 34. “Input Capture
with Dedicated Ti mer” (DS39722).
ICxBUF
4-Level FIFO Buffer
ICx Pin
ICM<2:0>
Set ICxIF
Edge Detect Logic
ICI<1:0>
ICOV, ICBNE
Interrupt
Logic
System Bus
Prescaler
Counter
1:1/4/16
and
Clock Synchronizer
Event and
Trigger and
Sync Logic
Clock
Select
IC Clock
Sources
Trigger and
Sync Sources
ICTSEL<2:0>
SYNCSEL<4:0>
Trigger
16
16
16
ICxTMR
Increment
Reset
PIC24FV32KA304 FAMILY
DS39995C-page 148 2011-2012 Microchip Technology Inc.
14.1.2 CASCADED (32-BIT) MODE
By default, each module operates independently with
its own 16-bit timer. To increase resolution, adjacent
even and odd modules can be configured to function as
a single 32-bit module. (For example, Modules 1 and 2
are paired, as are Modules 3 and 4, and so on.) The
odd-numbered module (ICx) provides the Least Signif-
icant 16 bits of the 32-bit register pairs, and the even
module (ICy) provides the Most Significant 16 bits.
Wrap arounds of the ICx registers cause an increment
of their corresponding ICy registers.
Cascaded operation is configured in hardware by
setting the IC32 bit (ICxCON2<8>) for both modules.
14.2 Capture Operations
The input capture module can be configured to capture
timer values and generate interrupts on rising edges on
ICx, or all transitions on ICx. Captures can be configured
to occur on all rising edges or just some (every 4th or
16th). Interrupts can be independently configured to
generate on each event or a subset of events.
To set up the module for capture operations:
1. If Synchronous mode is to be used, disable the
Sync source before proceeding.
2. Make sure that any previous data has been
removed from the FIFO by reading ICxBUF until
the ICBNE bit (ICxCON1<3>) is cleared.
3. Set the SYNCSELx bits (ICxCON2<4:0>) to the
desired Sync/trigger source.
4. Set the ICTSELx bits (ICxCON1<12:10>) for the
desired clock source. If the desired clock source
is running, set the ICTSELx bits before the input
capture module is enabled, for proper
synchronization with the desired clock source.
5. Set the ICIx bits (ICxCON1<6:5>) to the desired
interrupt frequency.
6. Select Synchronous or Trigger mode operation:
a) Check that the SYNCSELx bits are not set
to ‘00000’.
b) For Synchronous mode, clear the ICTRIG
bit (ICxCON2<7>).
c) For Trigger mode, set ICTRIG and clear the
TRIGSTAT bit (ICxCON2<6>).
7. Set the ICMx bits (ICxCON1<2:0>) to the
desired operational mode.
8. Enable the selected Sync/trigger source.
For 32-bit cascaded operations, the setup procedure is
slightly different:
1. Set the IC32 bits for both modules
(ICyCON2<8> and (ICxCON2<8>), enabling the
even-numbered module first. This ensures the
modules will start functioning in unison.
2. Set the ICTSELx and SYNCSELx bits for both
modules to select the same Sync/trigger and
time base source. Set the even module first,
then the odd module. Both modules must use
the same ICTSELx and SYNCSELx bit settings.
3. Clear the ICTRIG bit of the even module
(ICyCON2<7>). This forces the module to run in
Synchronous mode with the odd module,
regardless of its trigger setting.
4. Use the odd module’s ICIx bits (ICxCON1<6:5>)
to the desired interrupt frequency.
5. Use the ICTRIG bit of the odd module
(ICxCON2<7>) to configure Trigger or
Synchronous mode operation.
6. Use the ICMx bits of the odd module
(ICxCON1<2:0>) to set the desired capture
mode.
The module is ready to capture events when the time
base and the Sync/trigger source are enabled. When
the ICBNE bit (ICxCON1<3>) becomes set, at least
one capture value is available in the FIFO. Read input
capture values from the FIFO until the ICBNE clears
to ‘0’.
For 32-bit operation, read both the ICxBUF and
ICyBUF for the full 32-bit timer value (ICxBUF for the
lsw, ICyBUF for the msw). At least one capture value is
available in the FIFO buffer when the odd module’s
ICBNE bit (ICxCON1<3>) becomes set. Continue to
read the buffer registers until ICBNE is cleared
(performed automatically by hardware).
Note: For Synchronous mode operation, enable
the Sync source as the last step. Both
input capture modules are held in Reset
until the Sync source is enabled.
2011-2012 Microchip Technology Inc. DS39995C-page 149
PIC24FV32KA304 FAMILY
REGISTER 14-1: ICxCON1: INPUT CAPTURE x CONTROL REGISTER 1
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0
—— ICSIDL ICTSEL2 ICTSEL1 ICTSEL0 — —
bit 15 bit 8
U-0 R/W-0 R/W-0 R-0, HSC R-0, HSC R/W-0 R/W-0 R/W-0
— ICI1 ICI0 ICOV ICBNE ICM2 ICM1 ICM0
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13 ICSIDL: Input Capture x Module Stop in Idle Control bit
1 = Input capture module halts in CPU Idle mode
0 = Input capture module continues to operate in CPU Idle mode
bit 12-10 ICTSEL<2:0>: Input Capture Timer Select bits
111 = System clock (FOSC/2)
110 = Reserved
101 = Reserved
100 =Timer1
011 =Timer5
010 =Timer4
001 =Timer2
000 =Timer3
bit 9-7 Unimplemented: Read as ‘0’
bit 6-5 ICI<1:0>: Select Number of Captures per Interrupt bits
11 = Interrupt on every fourth capture event
10 = Interrupt on every third capture event
01 = Interrupt on every second capture event
00 = Interrupt on every capture event
bit 4 ICOV: Input Capture x Overflow Status Flag bit (read-only)
1 = Input capture overflow occurred
0 = No input capture overflow occurred
bit 3 ICBNE: Input Capture x Buffer Empty Status bit (read-only)
1 = Input capture buffer is not empty, at least one more capture value can be read
0 = Input capture buffer is empty
bit 2-0 ICM<2:0>: Input Capture Mode Select bits
111 = Interrupt mode: Input capture functions as an interrupt pin only when the device is in Sleep or
Idle mode (rising edge detect only, all other control bits are not applicable)
110 = Unused (module disabled)
101 = Prescaler Capture mode: Capture on every 16th rising edge
100 = Prescaler Capture mode: Capture on every 4th rising edge
011 = Simple Capture mode: Capture on every rising edge
010 = Simple Capture mode: Capture on every falling edge
001 = Edge Detect Capture mode: Capture on every edge (rising and falling); ICI<1:0 bits do not
control interrupt generation for this mode
000 = Input capture module is turned off
PIC24FV32KA304 FAMILY
DS39995C-page 150 2011-2012 Microchip Technology Inc.
REGISTER 14-2: ICxCON2: INPUT CAPTURE x CONTROL REGISTER 2
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0
— — — — — — —IC32
bit 15 bit 8
R/W-0 R/W-0, HS U-0 R/W-0 R/W-1 R/W-1 R/W-0 R/W-1
ICTRIG TRIGSTAT — SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-9 Unimplemented: Read as ‘0’
bit 8 IC32: Cascade Two IC Modules Enable bit (32-bit operation)
1 = ICx and ICy operate in cascade as a 32-bit module (this bit must be set in both modules)
0 = ICx functions independently as a 16-bit module
bit 7 ICTRIG: ICx Sync/Trigger Select bit
1 = Trigger ICx from source designated by the SYNCSELx bits
0 = Synchronize ICx with source designated by the SYNCSELx bits
bit 6 TRIGSTAT: Timer Trigger Status bit
1 = Timer source has been triggered and is running (set in hardware, can be set in software)
0 = Timer source has not been triggered and is being held clear
bit 5 Unimplemented: Read as ‘0’
bit 4-0 SYNCSEL<4:0>: Trigger/Synchronization Source Selection bits
11111 = Reserved
11110 = Reserved
11101 = Reserved
11100 = CTMU(1)
11011 = A/D(1)
11010 = Comparator 3(1)
11001 = Comparator 2(1)
11000 = Comparator 1(1)
10111 = Input Capture 4
10110 = Input Capture 3
10101 = Input Capture 2
10100 = Input Capture 1
10011 = Reserved
10010 = Reserved
1000x = Reserved
01111 = Timer5
01110 = Timer4
01101 = Timer3
01100 = Timer2
01011 = Timer1
01010 = Input Capture 5
01001 = Reserved
01000 = Reserved
00111 = Reserved
00110 = Reserved
00101 = Output Compare 5
00100 = Output Compare 4
00011 = Output Compare 3
00010 = Output Compare 2
00001 = Output Compare 1
00000 = Not synchronized to any other module
Note 1: Use these inputs as trigger sources only and never as Sync sources.
2011-2012 Microchip Technology Inc. DS39995C-page 151
PIC24FV32KA304 FAMILY
15.0 OUTPUT COMPARE WITH
DEDICATED TIMERS
All devices in the PIC24FV32KA304 family feature
3 independent output compare modules. Each of these
modules offers a wide range of configuration and
operating options for generating pulse trains on internal
device events. Also, the modules can produce
Pulse-Width Modulated (PWM) waveforms for driving
power applications.
Key features of the output compare module include:
• Hardware-configurable for 32-bit operation in all
modes by cascading two adjacent modules
• Synchronous and Trigger modes of output
compare operation, with up to 21 user-selectable
Sync/trigger sources available
• Two separate Period registers (a main register,
OCxR, and a secondary register, OCxRS) for
greater flexibility in generating pulses of varying
widths
• Configurable for single pulse or continuous pulse
generation on an output event, or continuous
PWM waveform generation
• Up to 6 clock sources available for each module
driving a separate internal 16-bit counter
15.1 General Operating Modes
15.1.1 SYNCHRONOUS AND TRIGGER
MODES
By default, the output compare module operates in a
Free-Running mode. The internal 16-bit counter,
OCxTMR, counts up continuously, wrapping around
from FFFFh to 0000h on each overflow, with its period
synchronized to the selected external clock source.
Compare or PWM events are generated each time a
match between the internal counter and one of the
Period registers occurs.
In Synchronous mode, the module begins performing
its compare or PWM operation as soon as its selected
clock source is enabled. Whenever an event occurs on
the selected Sync source, the module’s internal coun-
ter is reset. In Trigger mode, the module waits for a
Sync event from another internal module to occur
before allowing the counter to run.
Free-Running mode is selected by default or any time
that the SYNCSELx bits (OCxCON2<4:0>) are set to
‘00000’. Synchronous or Trigger modes are selected
any time the SYNCSELx bits are set to any value
except ‘00000’. The OCTRIG bit (OCxCON2<7>)
selects either Synchronous or Trigger mode. Setting
this bit selects Trigger mode operation. In both modes,
the SYNCSELx bits determine the Sync/trigger source.
15.1.2 CASCADED (32-BIT) MODE
By default, each module operates independently with
its own set of 16-bit Timer and Duty Cycle registers. To
increase the range, adjacent even and odd modules
can be configured to function as a single 32-bit module.
(For example, Modules 1 and 2 are paired, as are
Modules 3 and 4, and so on.) The odd-numbered
module (OCx) provides the Least Significant 16 bits of
the 32-bit register pairs, and the even-numbered
module (OCy) provides the Most Significant 16 bits.
Wrap arounds of the OCx registers cause an increment
of their corresponding OCy registers.
Cascaded operation is configured in hardware by setting
the OC32 bit (OCxCON2<8>) for both modules.
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 35. “Output Compare with
Dedicated Timer” (DS39723).
PIC24FV32KA304 FAMILY
DS39995C-page 152 2011-2012 Microchip Technology Inc.
FIGURE 15-1: OUTPUT COMPARE x BLOCK DIAGRAM (16-BIT MODE)
OCxR
Comparator
OCxTMR
OCxCON1
OCxCON2
OC Output and
OCx Interrupt
OCx Pin
Comparator
Fault Logic
Match Event
Match Event
Trigger and
Sync Logic
Clock
Select
Increment
Reset
OC Clock
Sources
Trigger and
Sync Sources
Reset
Match Event
OCTSELx
SYNCSELx
TRIGSTAT
TRIGMODE
OCTRIG
OCMx
OCINV
OCTRIS
FLTOUT
FLTTRIEN
FLTMD
ENFLTx
OCFLTx
DCBx
OCxRS
OCFA/
OCFB/
CxOUT
2011-2012 Microchip Technology Inc. DS39995C-page 153
PIC24FV32KA304 FAMILY
15.2 Compare Operations
In Compare mode (Figure 15-1), the output compare
module can be configured for single-shot or continuous
pulse generation. It can also repeatedly toggle an
output pin on each timer event.
To set up the module for compare operations:
1. Calculate the required values for the OCxR and
(for Double Compare modes) OCxRS Duty
Cycle registers:
a) Determine the instruction clock cycle time.
Take into account the frequency of the
external clock to the timer source (if one is
used) and the timer prescaler settings.
b) Calculate time to the rising edge of the
output pulse relative to the timer start value
(0000h).
c) Calculate the time to the falling edge of the
pulse, based on the desired pulse width and
the time to the rising edge of the pulse.
2. Write the rising edge value to OCxR and the
falling edge value to OCxRS.
3. For Trigger mode operations, set OCTRIG to
enable Trigger mode. Set or clear TRIGMODE
to configure the trigger operation and
TRIGSTAT to select a hardware or software
trigger. For Synchronous mode, clear OCTRIG.
4. Set the SYNCSEL<4:0> bits to configure the
trigger or synchronization source. If free-running
timer operation is required, set the SYNCSELx
bits to ‘00000’ (no Sync/trigger source).
5. Select the time base source with the
OCTSEL<2:0> bits. If the desired clock source is
running, set the OCTSEL<2:0> bits before the
output compare module is enabled for proper
synchronization with the desired clock source. If
necessary, set the TON bit for the selected timer
which enables the compare time base to count.
Synchronous mode operation starts as soon as
the synchronization source is enabled; Trigger
mode operation starts after a trigger source event
occurs.
6. Set the OCM<2:0> bits for the appropriate
compare operation (‘0xx’).
For 32-bit cascaded operation, these steps are also
necessary:
1. Set the OC32 bits for both registers
(OCyCON2<8> and (OCxCON2<8>). Enable
the even-numbered module first to ensure the
modules will start functioning in unison.
2. Clear the OCTRIG bit of the even module
(OCyCON2), so the module will run in
Synchronous mode.
3. Configure the desired output and Fault settings
for OCy.
4. Force the output pin for OCx to the output state
by clearing the OCTRIS bit.
5. If Trigger mode operation is required, configure
the trigger options in OCx by using the OCTRIG
(OCxCON2<7>), TRIGSTAT (OCxCON2<6>)
and SYNCSELx (OCxCON2<4:0>) bits.
6. Configure the desired Compare or PWM mode
of operation (OCM<2:0>) for OCy first, then for
OCx.
Depending on the output mode selected, the module
holds the OCx pin in its default state and forces a
transition to the opposite state when OCxR matches
the timer. In Double Compare modes, OCx is forced
back to its default state when a match with OCxRS
occurs. The OCxIF interrupt flag is set after an OCxR
match in Single Compare modes and after each
OCxRS match in Double Compare modes.
Single-shot pulse events only occur once, but may be
repeated by simply rewriting the value of the
OCxCON1 register. Continuous pulse events continue
indefinitely until terminated.
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DS39995C-page 154 2011-2012 Microchip Technology Inc.
15.3 Pulse-Width Modulation (PWM)
Mode
In PWM mode, the output compare module can be
configured for edge-aligned or center-aligned pulse
waveform generation. All PWM operations are
double-buffered (buffer registers are internal to the
module and are not mapped into SFR space).
To configure the output compare module for
edge-aligned PWM operation:
1. Calculate the desired on-time and load it into the
OCxR register.
2. Calculate the desired period and load it into the
OCxRS register.
3. Select the current OCx as the synchronization
source by writing 0x1F to SYNCSEL<4:0>
(OCxCON2<4:0>) and ‘0’ to OCTRIG
(OCxCON2<7>).
4. Select a clock source by writing the
OCTSEL2<2:0> (OCxCON<12:10>) bits.
5. Enable interrupts, if required, for the timer and
output compare modules. The output compare
interrupt is required for PWM Fault pin utilization.
6. Select the desired PWM mode in the OCM<2:0>
(OCxCON1<2:0>) bits.
7. If a timer is selected as a clock source, set the
TMRy prescale value and enable the time base by
setting the TON (TxCON<15>) bit.
FIGURE 15-2: OUTPUT COMP ARE x BLOCK DIAGRAM (DOUBLE-BUFFERED,
16-B IT PWM MODE )
OCxR and DCB<1:0> Buffers
Comparator
OCxTMR
OCxCON1
OCxCON2
OC Output Timing
OCx Interrupt
OCx Pin
OCxRS Buffer
Comparator
and Fault Logic
Match
Match
Trigger and
Sync Logic
Clock
Select
Increment
Reset
OC Clock
Sources
Trigger and
Sync Sources
Reset
Match Event
OCFA/OCFB/CxOUT
OCTSELx
SYNCSELx
TRIGSTAT
TRIGMODE
OCTRIG
OCMx
OCINV
OCTRIS
FLTOUT
FLTTRIEN
FLTMD
ENFLTx
OCFLTx
OCxR and DCB<1:0>
OCxRS
Event
Event
Rollover
Rollover/Reset
Rollover/Reset
DCB<1:0>
2011-2012 Microchip Technology Inc. DS39995C-page 155
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15.3.1 PWM PERIOD
In Edge-Aligned PWM mode, the period is specified by
the value of the OCxRS register. In Center-Aligned
PWM mode, the period of the synchronization source,
such as the Timers’ PRy, specifies the period. The
period in both cases can be calculated using
Equation 15-1.
EQUATION 15-1: CALCULATING THE PWM
PERIOD(1)
15.3.2 PWM DUTY CYCLE
The PWM duty cycle is specified by writing to the
OCxRS and OCxR registers. The OCxRS and OCxR
registers can be written to at any time, but the duty
cycle value is not latched until a period is complete.
This provides a double buffer for the PWM duty cycle
and is essential for glitchless PWM operation.
Some important boundary parameters of the PWM duty
cycle include:
• Edge-Aligned PWM:
- If OCxR and OCxRS are loaded with 0000h,
the OCx pin will remain low (0% duty cycle).
- If OCxRS is greater than OCxR, the pin will
remain high (100% duty cycle).
• Center-Aligned PWM (with TMRy as the
Sync source):
- If OCxR, OCxRS and PRy are all loaded with
0000h, the OCx pin will remain low
(0% duty cycle).
- If OCxRS is greater than PRy, the pin will go
high (100% duty cycle).
See Example 15-3 for PWM mode timing details.
Table 15-1 and Table 15-2 show example PWM
frequencies and resolutions for a device operating at
4 MIPS and 10 MIPS, respectively.
EQUATION 15-2: CALCULATION FOR MAXIMUM PWM RESOLUTION(1)
EQUATION 15-3: PWM PERIOD AND DUTY CYCLE CALCULATIONS(1)
PWM Period = [Value + 1] x TCY x (Prescaler Value)
Where:
Note 1: Based on TCY = TOSC * 2; Doze mode and
PLL are disabled.
(if TMRy is th e Sync s ource).
and can be PRy in Center-Aligned PWM mode
Value = OCxRS in Edge-Aligned PWM mode
( )
Maximum PWM Resolution (bits) =
FCY
FPWM • (Prescale Value)
log10
log10(2) bits
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
1. Find the OCxRS register value for a desired PWM frequency of 52.08 kHz, where FOSC = 8 MHz with PLL (32 MHz device
clock rate ) and a prescaler setti ng of 1:1 using Edge-Aligned P WM mode:
TCY = 2 * TOSC = 62.5 ns
PWM Period = 1/PWM Frequency = 1/52.08 kHz = 19.2 s
PWM Period = (OCxRS + 1) • TCY • (OCx Prescale Value)
19.2 s = (OCxRS + 1) • 62 .5 ns • 1
OCxRS = 306
2. Find the maximum resolution of the duty cycle that can be used with a 52.08 kHz frequency and a 32 MHz device clock rate:
PWM Resolution = log10(FCY/FPWM)/log102) bits
=(log
10(16 MHz/52.08 kHz)/log102) bit s
= 8.3 bits
Note 1: Based on TCY = 2 * TOSC; Doze mode and PLL are disabled.
PIC24FV32KA304 FAMILY
DS39995C-page 156 2011-2012 Microchip Technology Inc.
15.4 Subcycle Resolution
The DCBx bits (OCxCON2<10:9>) provide for resolu-
tion better than one instruction cycle. When used, they
delay the falling edge generated from a match event by
a portion of an instruction cycle.
For example, setting DCB<1:0> = 10 causes the falling
edge to occur halfway through the instruction cycle in
which the match event occurs, instead of at the
beginning. These bits cannot be used when
OCM<2:0> = 001. When operating the module in PWM
mode (OCM<2:0> = 110 or 111), the DCBx bits will be
double-buffered.
The DCBx bits are intended for use with a clock source
identical to the system clock. When an OCx module
with enabled prescaler is used, the falling edge delay
caused by the DCBx bits will be referenced to the
system clock period, rather than the OCx module’s
period.
TABLE 15-1: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 4 MIPS (FCY = 4 MHz)(1)
TABLE 15-2: EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 16 MIPS (FCY = 16 MHz)(1)
PWM Frequency 7.6 Hz 61 Hz 122 Hz 977 Hz 3.9 kHz 31.3 kHz 125 kHz
Prescaler Ratio 8111111
Period Value FFFFh FFFFh 7FFFh 0FFFh 03FFh 007Fh 001Fh
Resolution (bits) 16 16 15 12 10 7 5
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
PWM Frequency 30.5 Hz 244 Hz 488 Hz 3.9 kHz 15.6 kHz 125 kHz 500 kHz
Prescaler Ratio 8111111
Period Value FFFFh FFFFh 7FFFh 0FFFh 03FFh 007Fh 001Fh
Resolution (bits) 16 16 15 12 10 7 5
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
2011-2012 Microchip Technology Inc. DS39995C-page 157
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REGISTER 15-1: OCxCON1: OUTPUT COMPARE x CONTROL REGISTER 1
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
—— OCSIDL OCTSEL2 OCTSEL1 OCTSEL0 ENFLT2 ENFLT1
bit 15 bit 8
R/W-0 R/W-0, HSC R/W-0, HSC R/W-0, HSC R/W-0 R/W-0 R/W-0 R/W-0
ENFLT0 OCFLT2 OCFLT1 OCFLT0 TRIGMODE OCM2(1)OCM1(1)OCM0(1)
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 Unimplemented: Read as ‘0’
bit 13 OCSIDL: Stop Output Compare x in Idle Mode Control bit
1 = Output Compare x halts in CPU Idle mode
0 = Output Compare x continues to operate in CPU Idle mode
bit 12-10 OCTSEL<2:0>: Output Compare x Timer Select bits
111 = System clock
110 = Reserved
101 = Reserved
100 = Timer1
011 = Timer5
010 = Timer4
001 = Timer3
000 = Timer2
bit 9 ENFLT2: Comparator Fault Input Enable bit
1 = Comparator Fault input is enabled
0 = Comparator Fault input is disabled
bit 8 ENFLT1: OCFB Fault Input Enable bit
1 = OCFB Fault input is enabled
0 = OCFB Fault input is disabled
bit 7 ENFLT0: OCFA Fault Input Enable bit
1 = OCFA Fault input is enabled
0 = OCFA Fault input is disabled
bit 6 OCFLT2: PWM Comparator Fault Condition Status bit
1 = PWM comparator Fault condition has occurred (this is cleared in hardware only)
0 = PWM comparator Fault condition has not occurred (this bit is used only when OCM<2:0> = 111)
bit 5 OCFLT1: PWM OCFB Fault Input Enable bit
1 = PWM OCFB Fault condition has occurred (this is cleared in hardware only)
0 = PWM OCFB Fault condition has not occurred (this bit is used only when OCM<2:0> = 111)
bit 4 OCFLT0: PWM OCFA Fault Condition Status bit
1 = PWM OCFA Fault condition has occurred (this is cleared in hardware only)
0 = PWM OCFA Fault condition has not occurred (this bit is used only when OCM<2:0> = 111)
bit 3 TRIGMODE: Trigger Status Mode Select bit
1 = TRIGSTAT (OCxCON2<6>) is cleared when OCxRS = OCxTMR or in software
0 = TRIGSTAT is only cleared by software
Note 1: The comparator module used for Fault input varies with the OCx module. OC1 and OC2 use
Comparator 1; OC3 and OC4 use Comparator 2; OC5 uses Comparator 3.
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DS39995C-page 158 2011-2012 Microchip Technology Inc.
bit 2-0 OCM<2:0>: Output Compare x Mode Select bits(1)
111 = Center-Aligned PWM mode on OCx
110 = Edge-Aligned PWM mode on OCx
101 = Double Compare Continuous Pulse mode: Initialize OCx pin low; toggle OCx state continuously
on alternate matches of OCxR and OCxRS
100 = Double Compare Single-Shot mode: Initialize OCx pin low; toggle OCx state on matches of
OCxR and OCxRS for one cycle
011 = Single Compare Continuous Pulse mode: Compare events continuously toggle the OCx pin
010 = Single Compare Single-Shot mode: Initialize OCx pin high; compare event forces the OCx pin low
001 = Single Compare Single-Shot mode: Initialize OCx pin low, compare event forces the OCx pin high
000 = Output compare channel is disabled
REGISTER 15-1: OCxCON1: OUTPUT COMPARE x CONTROL REGISTER 1 (CONTINUED)
Note 1: The comparator module used for Fault input varies with the OCx module. OC1 and OC2 use
Comparator 1; OC3 and OC4 use Comparator 2; OC5 uses Comparator 3.
2011-2012 Microchip Technology Inc. DS39995C-page 159
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REGISTER 15-2: OCxCON2: OUTPUT COMPARE x CONTROL REGISTER 2
R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0
FLTMD FLTOUT FLTTRIEN OCINV — DCB1(3)DCB0(3)OC32
bit 15 bit 8
R/W-0 R/W-0, HS R/W-0 R/W-0 R/W-1 R/W-1 R/W-0 R/W-0
OCTRIG TRIGSTAT OCTRIS SYNCSEL4 SYNCSEL3 SYNCSEL2 SYNCSEL1 SYNCSEL0
bit 7 bit 0
Legend: HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 FLTMD: Fault Mode Select bit
1 = Fault mode is maintained until the Fault source is removed and the corresponding OCFLTx bit is
cleared in software
0 = Fault mode is maintained until the Fault source is removed and a new PWM period starts
bit 14 FLTOUT: Fault Out bit
1 = PWM output is driven high on a Fault
0 = PWM output is driven low on a Fault
bit 13 FLTTRIEN: Fault Output State Select bit
1 = Pin is forced to an output on a Fault condition
0 = Pin I/O condition is unaffected by a Fault
bit 12 OCINV: OCMP Invert bit
1 = OCx output is inverted
0 = OCx output is not inverted
bit 11 Unimplemented: Read as ‘0’
bit 10-9 DCB<1:0>: OC Pulse-Width Least Significant bits(3)
11 = Delays OCx falling edge by 3/4 of the instruction cycle
10 = Delays OCx falling edge by 1/2 of the instruction cycle
01 = Delays OCx falling edge by 1/4 of the instruction cycle
00 = OCx falling edge occurs at start of the instruction cycle
bit 8 OC32: Cascade Two OC Modules Enable bit (32-bit operation)
1 = Cascade module operation is enabled
0 = Cascade module operation is disabled
bit 7 OCTRIG: OCx Sync/Trigger Select bit
1 = Triggers OCx from source designated by the SYNCSELx bits
0 = Synchronizes OCx with source designated by the SYNCSELx bits
bit 6 TRIGSTAT: Timer Trigger Status bit
1 = Timer source has been triggered and is running
0 = Timer source has not been triggered and is being held clear
bit 5 OCTRIS: OCx Output Pin Direction Select bit
1 = OCx pin is tri-stated
0 = Output Compare Peripheral x is connected to the OCx pin
Note 1: Do not use an Output Compare module as its own trigger source, either by selecting this mode or another
equivalent SYNCSELx setting.
2: Use these inputs as trigger sources only and never as Sync sources.
3: These bits affect the rising edge when OCINV = 1. The bits have no effect when the OCMx bits
(OCxCON1<2:0>) = 001.
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bit 4-0 SYNCSEL<4:0>: Trigger/Synchronization Source Selection bits
11111 = This OC module(1)
11110 = Reserved
11101 = Reserved
11100 = CTMU(2)
11011 = A/D(2)
11010 = Comparator 3(2)
11001 = Comparator 2(2)
11000 = Comparator 1(2)
10111 = Input Capture 4(2)
10110 = Input Capture 3(2)
10101 = Input Capture 2(2)
10100 = Input Capture 1(2)
100xx = Reserved
01111 = Timer5
01110 = Timer4
01101 = Timer3
01100 = Timer2
01011 = Timer1
01010 = Input Capture 5(2)
01001 = Reserved
01000 = Reserved
00111 = Reserved
00110 = Reserved
00101 = Output Compare 5(1)
00100 = Output Compare 4(1)
00011 = Output Compare 3(1)
00010 = Output Compare 2(1)
00001 = Output Compare 1(1)
00000 = Not synchronized to any other module
REGISTER 15-2: OCxCON2: OUTPUT COMPARE x CONTROL REGISTER 2 (CONTINUED)
Note 1: Do not use an Output Compare module as its own trigger source, either by selecting this mode or another
equivalent SYNCSELx setting.
2: Use these inputs as trigger sources only and never as Sync sources.
3: These bits affect the rising edge when OCINV = 1. The bits have no effect when the OCMx bits
(OCxCON1<2:0>) = 001.
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16.0 SERIAL PERIPHERAL
INTERFACE (SPI)
The Serial Peripheral Interface (SPI) module is a
synchronous serial interface useful for communicating
with other peripheral or microcontroller devices. These
peripheral devices may be serial data EEPROMs, shift
registers, display drivers, A/D Converters, etc. The SPI
module is compatible with Motorola® SPI and SIOP
interfaces.
The module supports operation in two buffer modes. In
Standard mode, data is shifted through a single serial
buffer. In Enhanced Buffer mode, data is shifted
through an 8-level FIFO buffer.
The module also supports a basic framed SPI protocol
while operating in either Master or Slave mode. A total
of four framed SPI configurations are supported.
The SPI serial interface consists of four pins:
• SDI1: Serial Data Input
• SDO1: Serial Data Output
• SCK1: Shift Clock Input or Output
• SS1: Active-Low Slave Select or Frame
Synchronization I/O Pulse
The SPI module can be configured to operate using 2,
3 or 4 pins. In the 3-pin mode, SS1 is not used. In the
2-pin mode, both SDO1 and SS1 are not used.
Block diagrams of the module, in Standard and
Enhanced Buffer modes, are shown in Figure 16-1 and
Figure 16-2.
The devices of the PIC24FV32KA304 family offer two
SPI modules on a device.
To set up the SPI1 module for the Standard Master
mode of operation:
1. If using interrupts:
a) Clear the SPI1IF bit in the IFS0 register.
b) Set the SPI1IE bit in the IEC0 register.
c) Write the respective SPI1IPx bits in the
IPC2 register to set the interrupt priority.
2. Write the desired settings to the SPI1CON1 and
SPI1CON2 registers with the MSTEN bit
(SPI1CON1<5>) = 1.
3. Clear the SPIROV bit (SPI1STAT<6>).
4. Enable SPI operation by setting the SPIEN bit
(SPI1STAT<15>).
5. Write the data to be transmitted to the SPI1BUF
register. Transmission (and reception) will start
as soon as data is written to the SPI1BUF
register.
To set up the SPI1 module for the Standard Slave mode
of operation:
1. Clear the SPI1BUF register.
2. If using interrupts:
a) Clear the SPI1IF bit in the IFS0 register.
b) Set the SPI1IE bit in the IEC0 register.
c) Write the respective SPI1IPx bits in the
IPC2 register to set the interrupt priority.
3. Write the desired settings to the SPI1CON1
and SPI1CON2 registers with the MSTEN bit
(SPI1CON1<5>) = 0.
4. Clear the SMP bit.
5. If the CKE bit is set, then the SSEN bit
(SPI1CON1<7>) must be set to enable the SS1
pin.
6. Clear the SPIROV bit (SPI1STAT<6>).
7. Enable SPI operation by setting the SPIEN bit
(SPI1STAT<15>).
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the Serial
Peripheral Interface, refer to the “PIC24F
Family Reference Manual”, Section 23.
“Serial Peripheral Interface (SPI)”
(DS39699).
Note: Do not perform read-modify-write opera-
tions (such as bit-oriented instructions) on
the SPI1BUF register in either Standard or
Enhanced Buffer mode.
Note: In this section, the SPI modules are
referred to as SPIx. Special Function
Registers (SFRs) will follow a similar
notation. For example, SPI1CON1 or
SPI1CON2 refers to the control register
for the SPI1 module.
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DS39995C-page 162 2011-2012 Microchip Technology Inc.
FIGURE 16-1: SPI1 MODULE BLOCK DIAGRAM (STANDARD BUFFER MODE)
Internal Data Bus
SDI1
SDO1
SS1/FSYNC1
SCK1
bit 0
Shift Control
Edge
Select
FCY
Primary
1:1/4/16/64
Enable
Prescaler
SPI1BUF
Control
TransferTransfer
Write SPI1BUFRead SPI1BUF
16
SPI1CON1<1:0>
SPI1CON1<4:2>
Master Clock
Secondary
Prescaler
1:1 to 1:8
Clock
Control
SPI1SR
Sync
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To set up the SPI1 module for the Enhanced Buffer
Master (EBM) mode of operation:
1. If using interrupts:
a) Clear the SPI1IF bit in the IFS0 register.
b) Set the SPI1IE bit in the IEC0 register.
c) Write the respective SPI1IPx bits in the
IPC2 register.
2. Write the desired settings to the SPI1CON1
and SPI1CON2 registers with the MSTEN bit
(SPI1CON1<5>) = 1.
3. Clear the SPIROV bit (SPI1STAT<6>).
4. Select Enhanced Buffer mode by setting the
SPIBEN bit (SPI1CON2<0>).
5. Enable SPI operation by setting the SPIEN bit
(SPI1STAT<15>).
6. Write the data to be transmitted to the SPI1BUF
register. Transmission (and reception) will start
as soon as data is written to the SPI1BUF
register.
To set up the SPI1 module for the Enhanced Buffer
Slave mode of operation:
1. Clear the SPI1BUF register.
2. If using interrupts:
a) Clear the SPI1IF bit in the IFS0 register.
b) Set the SPI1IE bit in the IEC0 register.
c) Write the respective SPI1IPx bits in the
IPC2 register to set the interrupt priority.
3. Write the desired settings to the SPI1CON1 and
SPI1CON2 registers with the MSTEN bit
(SPI1CON1<5>) = 0.
4. Clear the SMP bit.
5. If the CKE bit is set, then the SSEN bit must be
set, thus enabling the SS1 pin.
6. Clear the SPIROV bit (SPI1STAT<6>).
7. Select Enhanced Buffer mode by setting the
SPIBEN bit (SPI1CON2<0>).
8. Enable SPI operation by setting the SPIEN bit
(SPI1STAT<15>).
FIGURE 16-2: SPI1 MODULE BLOCK DIAGRAM (ENHANCED BUFFER MODE)
Internal Data Bus
SDI1
SDO1
SS1/FSYNC1
SCK1
bit 0
Shift Control
Edge
Select
FCY
Enable
SPI1BUF
Control
TransferTransfer
Write SPI1BUFRead SPI1BUF
16
SPI1CON1<1:0>
SPI1CON1<4:2>
Master Clock
Clock
Control
Primary
1:1/4/16/64
Prescaler
Secondary
Prescaler
1:1 to 1:8
Sync
SPI1SR
Transmit Buffer
8-Level FIFO
Receive Buffer
8-Level FIFO
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DS39995C-page 164 2011-2012 Microchip Technology Inc.
REGISTER 16-1: SPIxSTAT: SPIx STATUS AND CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 R-0, HSC R-0, HSC R-0, HSC
SPIEN —SPISIDL—— SPIBEC2 SPIBEC1 SPIBEC0
bit 15 bit 8
R-0,HSC R/C-0, HS R/W-0, HSC R/W-0 R/W-0 R/W-0 R-0, HSC R-0, HSC
SRMPT SPIROV SRXMPT SISEL2 SISEL1 SISEL0 SPITBF SPIRBF
bit 7 bit 0
Legend: C = Clearable bit HS = Hardware Settable bit HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 SPIEN: SPIx Enable bit
1 = Enables module and configures SCKx, SDOx, SDIx and SSx as serial port pins
0 = Disables module
bit 14 Unimplemented: Read as ‘0’
bit 13 SPISIDL: Stop in Idle Mode bit
1 = Discontinues module operation when device enters Idle mode
0 = Continues module operation in Idle mode
bit 12-11 Unimplemented: Read as ‘0’
bit 10-8 SPIBEC<2:0>: SPIx Buffer Element Count bits (valid in Enhanced Buffer mode)
Master mode:
Number of SPI transfers pending.
Slave mode:
Number of SPI transfers unread.
bit 7 SRMPT: Shift Register (SPIxSR) Empty bit (valid in Enhanced Buffer mode)
1 = SPIx Shift register is empty and ready to send or receive
0 = SPIx Shift register is not empty
bit 6 SPIROV: Receive Overflow Flag bit
1 = A new byte/word is completely received and discarded
(The user software has not read the previous data in the SPI1BUF register.)
0 = No overflow has occurred
bit 5 SRXMPT: Receive FIFO Empty bit (valid in Enhanced Buffer mode)
1 = Receive FIFO is empty
0 = Receive FIFO is not empty
bit 4-2 SISEL<2:0>: SPIx Buffer Interrupt Mode bits (valid in Enhanced Buffer mode)
111 = Interrupt when SPIx transmit buffer is full (SPITBF bit is set)
110 = Interrupt when last bit is shifted into SPIxSR; as a result, the TX FIFO is empty
101 = Interrupt when the last bit is shifted out of SPIxSR; now the transmit is complete
100 = Interrupt when one data byte is shifted into the SPIxSR; as a result, the TX FIFO has one open spot
011 = Interrupt when SPIx receive buffer is full (SPIRBF bit is set)
010 = Interrupt when SPIx receive buffer is 3/4 or more full
001 = Interrupt when data is available in receive buffer (SRMPT bit is set)
000 = Interrupt when the last data in the receive buffer is read; as a result, the buffer is empty
(SRXMPT bit is set)
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bit 1 SPITBF: SPIx Transmit Buffer Full Status bit
1 = Transmit has not yet started, SPIxTXB is full
0 = Transmit has started, SPIxTXB is empty
In Standard Buffer mode:
Automatically set in hardware when the CPU writes the SPIxBUF location, loading SPIxTXB.
Automatically cleared in hardware when the SPIx module transfers data from SPIxTXB to SPIxSR.
In Enhanced Buffer mode:
Automatically set in hardware when the CPU writes the SPIxBUF location, loading the last available buffer
location. Automatically cleared in hardware when a buffer location is available for a CPU write.
bit 0 SPIRBF: SPIx Receive Buffer Full Status bit
1 = Receive is complete, SPIxRXB is full
0 = Receive is not complete, SPIxRXB is empty
In Standard Buffer mode:
Automatically set in hardware when the SPIx transfers data from the SPIxSR to SPIxRXB. Automatically
cleared in hardware when the core reads the SPIxBUF location, reading SPIxRXB.
In Enhanced Buffer mode:
Automatically set in hardware when SPIx transfers data from SPIxSR to buffer, filling the last unread buffer
location. Automatically cleared in hardware when a buffer location is available for a transfer from SPIxSR.
REGISTER 16-1: SPIxSTAT: SPIx STATUS AND CONTROL REGISTER (CONTINUED)
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REGISTER 16-2: SPIXCON1: SPIx CONTROL REGI STER 1
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — DISSCK DISSDO MODE16 SMP CKE(1)
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
SSEN CKP MSTEN SPRE2 SPRE1 SPRE0 PPRE1 PPRE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-13 Unimplemented: Read as ‘0’
bit 12 DISSCK: Disable SCKx pin bit (SPIx Master modes only)
1 = Internal SPIx clock is disabled, pin functions as an I/O
0 = Internal SPIx clock is enabled
bit 11 DISSDO: Disables SDOx pin bit
1 = SDOx pin is not used by the module; pin functions as an I/O
0 = SDOx pin is controlled by the module
bit 10 MODE16: Word/Byte Communication Select bit
1 = Communication is word-wide (16 bits)
0 = Communication is byte-wide (8 bits)
bit 9 SMP: SPIx Data Input Sample Phase bit
Master mode:
1 = Input data is sampled at the end of data output time
0 = Input data is sampled at the middle of data output time
Slave mode:
SMP must be cleared when SPIx is used in Slave mode.
bit 8 CKE: SPIx Clock Edge Select bit(1)
1 = Serial output data changes on transition from active clock state to Idle clock state (see bit 6)
0 = Serial output data changes on transition from Idle clock state to active clock state (see bit 6)
bit 7 SSEN: Slave Select Enable bit (Slave mode)
1 =SSx pin is used for Slave mode
0 =SSx
pin is not used by the module; pin is controlled by port function
bit 6 CKP: Clock Polarity Select bit
1 = Idle state for clock is a high level; active state is a low level
0 = Idle state for clock is a low level; active state is a high level
bit 5 MSTEN: Master Mode Enable bit
1 = Master mode
0 =Slave mode
bit 4-2 SPRE<2:0>: Secondary Prescale bits (Master mode)
111 = Secondary prescale 1:1
110 = Secondary prescale 2:1
.
.
.
000 = Secondary prescale 8:1
Note 1: The CKE bit is not used in the Framed SPI modes. The user should program this bit to ‘0’ for the Framed
SPI modes (FRMEN = 1).
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bit 1-0 PPRE<1:0>: Primary Prescale bits (Master mode)
11 = Primary prescale 1:1
10 = Primary prescale 4:1
01 = Primary prescale 16:1
00 = Primary prescale 64:1
REGISTER 16-2: SPIXCON1: SPIx CONTROL REGISTER 1 (CONTINUED)
Note 1: The CKE bit is not used in the Framed SPI modes. The user should program this bit to ‘0’ for the Framed
SPI modes (FRMEN = 1).
REGISTER 16-3: SPIxCON2: SPIx CONTROL REGISTER 2
R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0 U-0
FRMEN SPIFSD SPIFPOL —————
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — SPIFE SPIBEN
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 FRMEN: Framed SPIx Support bit
1 = Framed SPIx support is enabled
0 = Framed SPIx support is disabled
bit 14 SPIFSD: Frame Sync Pulse Direction Control on SSx Pin bit
1 = Frame Sync pulse input (slave)
0 = Frame Sync pulse output (master)
bit 13 SPIFPOL: Frame Sync Pulse Polarity bit (Frame mode only)
1 = Frame Sync pulse is active-high
0 = Frame Sync pulse is active-low
bit 12-2 Unimplemented: Read as ‘0’
bit 1 SPIFE: Frame Sync Pulse Edge Select bit
1 = Frame Sync pulse coincides with the first bit clock
0 = Frame Sync pulse precedes the first bit clock
bit 0 SPIBEN: Enhanced Buffer Enable bit
1 = Enhanced buffer is enabled
0 = Enhanced buffer is disabled (Legacy mode)
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EQUATION 16-1: RELATIONSHIP BETWEEN DEVICE AND SPIx CLOCK SPEED(1)
TABLE 16-1: SAMPLE SCKx FREQUENCIES(1,2)
FCY = 16 MHz Secondary Prescaler Settings
1:12:14:16:18:1
Primary Prescaler Settings 1:1 Invalid 8000 4000 2667 2000
4:1 4000 2000 1000 667 500
16:1 1000 500 250 167 125
64:1 250 125 63 42 31
FCY = 5 MHz
Primary Prescaler Settings 1:1 5000 2500 1250 833 625
4:1 1250 625 313 208 156
16:1 313 156 78 52 39
64:17839201310
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
2: SCKx frequencies are indicated in kHz.
Primary Prescaler * Seco ndary Prescal er
FCY
FSCK =
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
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17.0 INTER-INTEGRATED
CIRCUIT™ (I2C™)
The Inter-Integrated Circuit (I2C™) module is a serial
interface useful for communicating with other
peripheral or microcontroller devices. These peripheral
devices may be serial data EEPROMs, display drivers,
A/D Converters, etc.
The I2C modules support these features:
• Independent master and slave logic
• 7-bit and 10-bit device addresses
• General call address, as defined in the
I2C
protocol
• Clock stretching to provide delays for the
processor to respond to a slave data request
• Both 100 kHz and 400 kHz bus specifications
• Configurable address masking
• Multi-Master modes to prevent loss of messages
in arbitration
• Bus Repeater mode, allowing the acceptance of
all messages as a slave, regardless of the
address
• Automatic SCL
A block diagram of the module is shown in Figure 17-1.
17.1 Pin Remapping Options
The I2C modules are tied to a fixed pin. To allow flexi-
bility with peripheral multiplexing, the I2C1 module, in
28-pin devices, can be reassigned to the alternate pins.
These alternate pins are designated as SCL1 and
SDA1 during device configuration.
Pin assignment is controlled by the I2CxSEL
Configuration bit. Programming this bit (= 0) multiplexes
the module to the SCL1 and SDA1 pins.
17.2 Communicating as a Master in a
Single Master Environ ment
The details of sending a message in Master mode
depends on the communication protocols for the device
being communicated with. Typically, the sequence of
events is as follows:
1. Assert a Start condition on SDAx and SCLx.
2. Send the I2C device address byte to the slave
with a write indication.
3. Wait for and verify an Acknowledge from the
slave.
4. Send the first data byte (sometimes known as
the command) to the slave.
5. Wait for and verify an Acknowledge from the
slave.
6. Send the serial memory address low byte to the
slave.
7. Repeat Steps 4 and 5, until all data bytes are
sent.
8. Assert a Repeated Start condition on SDAx and
SCLx.
9. Send the device address byte to the slave with
a read indication.
10. Wait for and verify an Acknowledge from the
slave.
11. Enable master reception to receive serial
memory data.
12. Generate an ACK or NACK condition at the end
of a received byte of data.
13. Generate a Stop condition on SDAx and SCLx.
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the
Inter-Integrated Circuit, refer to the
“PIC24F Family Reference Manual”,
Section 24. “Inter-Integrated Circuit™
(I2C™)” (DS39702).
Note: Throughout this section, references to
register and bit names that may be
associated with a specific I2C module are
referred to generically by the use of ‘x’ in
place of the specific module number. Thus,
“I2CxSTAT” might refer to the Receive
Status register for either I2C1 or I2C2.
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FIGURE 17-1: I2C™ BLOCK DIAGRAM (I2C1 MODULE IS SHOWN)
I2C1RCV
Internal
Data Bus
SCL1
SDA1
Shift
Match Detect
I2C1ADD
Clock
Address Match
LSB
Shift Clock
TCY/2
I2C1CON
I2C1STAT
Control Logic
LSB
I2C1BRG
I2C1RSR
Write
Read
Collision
Detect
Start and Stop
Bit Generation
Start and Stop
Bit Detect
Acknowledge
Generation
Clock
Stretching
I2C1TRN
I2C1MSK
Write
Read
Write
Read
Write
Read
Read
Write
Read
Write
Read
BRG Down Counter
Reload
Control
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17.3 Setting Baud Rate When
Operating as a Bus Master
To compute the Baud Rate Generator (BRG) reload
value, use Equation 17-1.
EQUATION 17-1: COMPUTING BAUD RATE
RELOAD VALUE(1)
17.4 Slave Address Masking
The I2CxMSK register (Register 17-3) designates
address bit positions as “don’t care” for both 7-Bit and
10-Bit Addressing modes. Setting a particular bit
location (= 1) in the I2CxMSK register causes the slave
module to respond, whether the corresponding
address bit value is ‘0’ or ‘1’. For example, when
I2CxMSK is set to ‘00100000’, the slave module will
detect both addresses: ‘0000000’ and ‘00100000’.
To enable address masking, the Intelligent Peripheral
Management Interface (IPMI) must be disabled by
clearing the IPMIEN bit (I2C1CON<11>).
TABLE 17-1: I2C™ CLOCK RATES(1)
TABLE 17-2: I2C™ RESERVED ADDRES SES(1)
I2CxBRG FCY
FSCL
------------FCY
10 000 000
------------------------------
–
1–=
FSCL FCY
I2CxBRG 1 FCY
10 000 000
------------------------------
++
----------------------------------------------------------------------
=
or
Note 1: Based on FCY = FOSC/2; Doze mode and PLL
are disabled.
Note: As a result of changes in the I2C protocol,
the addresses in Table 17-2 are reserved
and will not be Acknowledged in Slave
mode. This includes any address mask
settings that include any of these
addresses.
Required
System
FSCL FCY I2CxBRG Value Actual
FSCL
(Decimal) (Hexadecimal)
100 kHz 16 MHz 157 9D 100 kHz
100 kHz 8 MHz 78 4E 100 kHz
100 kHz 4 MHz 39 27 99 kHz
400 kHz 16 MHz 37 25 404 kHz
400 kHz 8 MHz 18 12 404 kHz
400kHz 4MHz 9 9 385kHz
400kHz 2MHz 4 4 385kHz
1 MHz 16 MHz 13 D 1.026 MHz
1MHz 8MHz 6 6 1.026MHz
1MHz 4MHz 3 3 0.909MHz
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
Slave
Address R/W
Bit Description
0000 000 0 General Call Address(2)
0000 000 1 Start Byte
0000 001 x CBus Address
0000 010 x Reserved
0000 011 x Reserved
0000 1xx x HS Mode Master Code
1111 1xx x Reserved
1111 0xx x 10-Bit Slave Upper Byte(3)
Note 1: The address bits listed here will never cause an address match, independent of the address mask settings.
2: This address will be Acknowledged only if GCEN = 1.
3: A match on this address can only occur on the upper byte in 10-Bit Addressing mode.
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REGISTER 17-1: I2CxCON: I2Cx CONTROL REGISTER
R/W-0 U-0 R/W-0 R/W-1, HC R/W-0 R/W-0 R/W-0 R/W-0
I2CEN — I2CSIDL SCLREL IPMIEN A10M DISSLW SMEN
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0, HC R/W-0, HC R/W-0, HC R/W-0, HC R/W-0, HC
GCEN STREN ACKDT ACKEN RCEN PEN RSEN SEN
bit 7 bit 0
Legend: HC = Hardware Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 I2CEN: I2Cx Enable bit
1 = Enables the I2Cx module and configures the SDAx and SCLx pins as serial port pins
0 = Disables the I2Cx module; all I2C™ pins are controlled by port functions
bit 14 Unimplemented: Read as ‘0’
bit 13 I2CSIDL: Stop in Idle Mode bit
1 = Discontinues module operation when the device enters an Idle mode
0 = Continues module operation in Idle mode
bit 12 SCLREL: SCLx Release Control bit (when operating as I2C slave)
1 = Releases SCLx clock
0 = Holds SCLx clock low (clock stretch)
If STREN = 1:
The bit is R/W (i.e., software may write ‘0’ to initiate stretch and write ‘1’ to release clock). Hardware is
clear at the beginning of the slave transmission. Hardware is clear at the end of slave reception.
If STREN = 0:
The bit is R/S (i.e., software may only write ‘1’ to release clock). Hardware is clear at the beginning of
slave transmission.
bit 11 IPMIEN: Intelligent Peripheral Management Interface (IPMI) Enable bit
1 = IPMI Support mode is enabled; all addresses are Acknowledged
0 = IPMI Support mode is disabled
bit 10 A10M: 10-Bit Slave Addressing bit
1 = I2CxADD is a 10-bit slave address
0 = I2CxADD is a 7-bit slave address
bit 9 DISSLW: Disable Slew Rate Control bit
1 = Slew rate control is disabled
0 = Slew rate control is enabled
bit 8 SMEN: SMBus Input Levels bit
1 = Enables I/O pin thresholds compliant with the SMBus specification
0 = Disables the SMBus input thresholds
bit 7 GCEN: General Call Enable bit (when operating as I2C slave)
1 = Enables interrupt when a general call address is received in the I2CxRSR (module is enabled
for reception)
0 = General call address is disabled
bit 6 STREN: SCLx Clock Stretch Enable bit (when operating as I2C slave)
Used in conjunction with the SCLREL bit.
1 = Enables software or receives clock stretching
0 = Disables software or receives clock stretching
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bit 5 ACKDT: Acknowledge Data bit (when operating as I2C master; applicable during master receive)
Value that will be transmitted when the software initiates an Acknowledge sequence.
1 = Sends NACK during Acknowledge
0 = Sends ACK during Acknowledge
bit 4 ACKEN: Acknowledge Sequence Enable bit
(when operating as I2C master; applicable during master receive)
1 = Initiates the Acknowledge sequence on the SDAx and SCLx pins, and transmits the ACKDT data bit;
hardware is clear at the end of the master Acknowledge sequence
0 = Acknowledge sequence is not in progress
bit 3 RCEN: Receive Enable bit (when operating as I2C master)
1 = Enables Receive mode for I2C; hardware is clear at the end of the eighth bit of the master receive
data byte
0 = Receive sequence is not in progress
bit 2 PEN: Stop Condition Enable bit (when operating as I2C master)
1 = Initiates Stop condition on SDAx and SCLx pins; hardware is clear at end of master Stop sequence
0 = Stop condition is not in progress
bit 1 RSEN: Repeated Start Condition Enable bit (when operating as I2C master)
1 = Initiates Repeated Start condition on SDAx and SCLx pins; hardware is clear at the end of the
master Repeated Start sequence
0 = Repeated Start condition is not in progress
bit 0 SEN: Start Condition Enable bit (when operating as I2C master)
1 = Initiates Start condition on SDAx and SCLx pins; hardware is clear at the end of the
master Start sequence
0 = Start condition is not in progress
REGISTER 17-1: I2CxCON: I2Cx CONTROL REGISTER (CONTINUED)
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REGISTER 17-2: I2C xSTAT: I2Cx STATUS REGISTER
R-0, HSC R-0, HSC U-0 U-0 U-0 R/C-0, HS R-0, HSC R-0, HSC
ACKSTAT TRSTAT — — — BCL GCSTAT ADD10
bit 15 bit 8
R/C-0, HS R/C-0, HS R-0, HSC R/C-0, HSC R/C-0, HSC R-0, HSC R-0, HSC R-0, HSC
IWCOL I2COV D/A PSR/WRBF TBF
bit 7 bit 0
Legend: C = Clearable bit HS = Hardware Settable bit HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ACKSTAT: Acknowledge Status bit
1 = NACK was detected last
0 = ACK was detected last
Hardware is set or clear at the end of Acknowledge.
bit 14 TRSTAT: Transmit Status bit
(when operating as I2C master; applicable to master transmit operation)
1 = Master transmit is in progress (8 bits + ACK)
0 = Master transmit is not in progress
Hardware is set at the beginning of the master transmission; hardware is clear at the end of
slave Acknowledge.
bit 13-11 Unimplemented: Read as ‘0’
bit 10 BCL: Master Bus Collision Detect bit
1 = A bus collision has been detected during a master operation
0 = No collision
Hardware is set at the detection of a bus collision.
bit 9 GCSTAT: General Call Status bit
1 = General call address was received
0 = General call address was not received
Hardware is set when an address matches the general call address; hardware is clear at Stop detection.
bit 8 ADD10: 10-Bit Address Status bit
1 = 10-bit address was matched
0 = 10-bit address was not matched
Hardware is set at a match of the 2nd byte of the matched 10-bit address; hardware is clear at Stop detection.
bit 7 IWCOL: Write Collision Detect bit
1 = An attempt to write to the I2CxTRN register failed because the I2C module is busy
0 = No collision
Hardware is set at an occurrence of a write to I2CxTRN while busy (cleared by software).
bit 6 I2COV : Receive Overflow Flag bit
1 = A byte was received while the I2CxRCV register is still holding the previous byte
0 = No overflow
Hardware is set at an attempt to transfer I2CxRSR to I2CxRCV (cleared by software).
bit 5 D/A: Data/Address bit (when operating as I2C slave)
1 = Indicates that the last byte received was data
0 = Indicates that the last byte received was the device address
Hardware is clear at a device address match; hardware is set by a write to I2CxTRN or by reception of
a slave byte.
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bit 4 P: Stop bit
1 = Indicates that a Stop bit has been detected last
0 = Stop bit was not detected last
Hardware is set or cleared when a Start, Repeated Start or Stop is detected.
bit 3 S: Start bit
1 = Indicates that a Start (or Repeated Start) bit has been detected last
0 = Start bit was not detected last
Hardware is set or clear when a Start, Repeated Start or Stop is detected.
bit 2 R/W: Read/Write Information bit (when operating as I2C slave)
1 = Read – indicates data transfer is output from the slave
0 = Write – indicates data transfer is input to the slave
Hardware is set or clear after the reception of an I2C device address byte.
bit 1 RBF: Receive Buffer Full Status bit
1 = Receive is complete, I2CxRCV is full
0 = Receive is not complete, I2CxRCV is empty
Hardware is set when I2CxRCV is written with a received byte; hardware is clear when the software reads
I2CxRCV.
bit 0 TBF: Transmit Buffer Full Status bit
1 = Transmit is in progress, I2CxTRN is full
0 = Transmit is complete, I2CxTRN is empty
Hardware is set when the software writes to I2CxTRN; hardware is clear at the completion of
data transmission.
REGISTER 17-2: I2CxSTAT: I2Cx STATUS REGISTER (CONTINUED)
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REGISTER 17-3: I2CxMSK: I2Cx SLAVE MODE ADDRESS MASK REGIS TER
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — AMSK9 AMSK8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
AMSK7 AMSK6 AMSK5 AMSK4 AMSK3 AMSK2 AMSK1 AMSK0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-10 Unimplemented: Read as ‘0’
bit 9-0 AMSK<9:0>: Mask for Address Bit x Select bits
1 = Enables masking for bit x of an incoming message address; bit match is not required in this position
0 = Disables masking for bit x; bit match is required in this position
REGISTER 17-4: PADCFG1: PAD CONFIGURATION CONTROL REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0
—— SMBUSDEL2 SMBUSDEL1 — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-6 Unimplemented: Read as ‘0’
bit 5 SMBUSDEL2: SMBus SDA2 Input Delay Select bit
1 = The I2C2 module is configured for a longer SMBus input delay (nominal 300 ns delay)
0 = The I2C2 module is configured for a legacy input delay (nominal 150 ns delay)
bit 4 SMBUSDEL1: SMBus SDA1 Input Delay Select bit
1 = The I2C1 module is configured for a longer SMBus input delay (nominal 300 ns delay)
0 = The I2C1 module is configured for a legacy input delay (nominal 150 ns delay)
bit 3-0 Unimplemented: Read as ‘0’
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18.0 UNIVERSAL ASYNCHRONOUS
RECEIVER TRANSMITTER
(UART)
The Universal Asynchronous Receiver Transmitter
(UART) module is one of the serial I/O modules
available in this PIC24F device family. The UART is a
full-duplex, asynchronous system that can communicate
with peripheral devices, such as personal computers,
LIN/J2602, RS-232 and RS-485 interfaces. This module
also supports a hardware flow control option with the
UxCTS and UxRTS pins, and also includes an IrDA®
encoder and decoder.
The primary features of the UART module are:
• Full-Duplex, 8-Bit or 9-Bit Data Transmission
through the UxTX and UxRX Pins
• Even, Odd or No Parity Options (for 8-bit data)
• One or Two Stop bits
• Hardware Flow Control Option with UxCTS and
UxRTS pins
• Fully Integrated Baud Rate Generator (IBRG) with
16-Bit Prescaler
• Baud Rates Ranging from 1 Mbps to 15 bps at
16 MIPS
• 4-Deep, First-In-First-Out (FIFO) Transmit Data
Buffer
• 4-Deep FIFO Receive Data Buffer
• Parity, Framing and Buffer Overrun Error
Detection
• Support for 9-Bit mode with Address Detect
(9th bit = 1)
• Transmit and Receive Interrupts
• Loopback mode for Diagnostic Support
• Support for Sync and Break Characters
• Supports Automatic Baud Rate Detection
•IrDA
® Encoder and Decoder Logic
• 16x Baud Clock Output for IrDA Support
A simplified block diagram of the UARTx is shown in
Figure 18-1. The UARTx module consists of these
important hardware elements:
• Baud Rate Generator
• Asynchronous Transmitter
• Asynchronous Receiver
FIGURE 18-1: UARTx SIMPLIFIED BLOCK DIAGRAM
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is
not intended to be a comprehensive
Reference source. For more information
on the Universal Asynchronous Receiver
Transmitter, refer to the “PIC24F Family
Reference Manual”, Section 21.
“UART” (DS39708).
Note: Throughout this section, references to
register and bit names that may be asso-
ciated with a specific USART module are
referred to generically by the use of ‘x’ in
place of the specific module number.
Thus, “UxSTA” might refer to the USART
Status register for either USART1 or
USART2.
UxRX
IrDA®
Hardware Flow Control
UARTx Receiver
UARTx Transmitter UxTX
UxCTS
UxRTS
UxBCLK
Baud Rate Generator
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18.1 UARTx Baud Rate Generator
(BRG)
The UARTx module includes a dedicated 16-bit Baud
Rate Generator (BRG). The UxBRG register controls
the period of a free-running, 16-bit timer. Equation 18-1
provides the formula for computation of the baud rate
with BRGH = 0.
EQUATION 18-1: UARTx BAUD RATE WITH
BRGH = 0(1)
Example 18-1 provides the calculation of the baud rate
error for the following conditions:
•FCY = 4 MHz
• Desired Baud Rate = 9600
The maximum baud rate (BRGH = 0) possible is
FCY/16 (for UxBRG = 0) and the minimum baud rate
possible is FCY/(16 * 65536).
Equation 18-2 shows the formula for computation of
the baud rate with BRGH = 1.
EQUATION 18-2: UARTx BAUD RATE WITH
BRGH = 1(1)
The maximum baud rate (BRGH = 1) possible is FCY/4
(for UxBRG = 0) and the minimum baud rate possible
is FCY/(4 * 65536).
Writing a new value to the UxBRG register causes the
BRG timer to be reset (cleared). This ensures the BRG
does not wait for a timer overflow before generating the
new baud rate.
EXAMPLE 18-1: BAUD RATE ERROR CALCULATION (BRGH = 0)(1)
Note 1: Based on FCY = FOSC/2; Doze mode
and PLL are disabled.
Baud Rate = FCY
16 • (UxBRG + 1)
FCY
16 • Baud Rate
UxBRG = – 1
Baud Rate = FCY
4 • (UxBRG + 1)
FCY
4 • Baud Rate
UxBRG = – 1
Note 1: Based on FCY = FOSC/2; Doze mode
and PLL are disabled.
Desired Baud Rate = FCY/(16 (UxBRG + 1))
Solving for UxBRG value:
UxBRG = ((FCY/Desired Baud Rate)/16 ) – 1
UxBRG = ((4000000/9600)/16) – 1
UxBRG = 25
Calculated Baud Rate = 4000 000/(16 (25 + 1))
= 9615
Error = (Calculated Baud Rate – Desired B a ud Rate)
Desired Baud Rate
= (9615 – 9600)/9 600
=0.16%
Note 1: Based on FCY = FOSC/2; Doze mode and PLL are disabled.
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18.2 Transmitting in 8-Bit Data Mode
1. Set up the UARTx:
a) Write appropriate values for data, parity and
Stop bits.
b) Write appropriate baud rate value to the
UxBRG register.
c) Set up transmit and receive interrupt enable
and priority bits.
2. Enable the UARTx.
3. Set the UTXEN bit (causes a transmit interrupt,
two cycles after being set).
4. Write the data byte to the lower byte of the
UxTXREG word. The value will be immediately
transferred to the Transmit Shift Register (TSR)
and the serial bit stream will start shifting out
with the next rising edge of the baud clock.
5. Alternately, the data byte may be transferred
while UTXEN = 0 and then, the user may set
UTXEN. This will cause the serial bit stream to
begin immediately, because the baud clock will
start from a cleared state.
6. A transmit interrupt will be generated as per
interrupt control bit, UTXISELx.
18.3 Transmitting in 9-Bit Data Mode
1. Set up the UARTx (as described in Section 18.2
“Transmitting in 8-Bit Data Mode”).
2. Enable the UARTx.
3. Set the UTXEN bit (causes a transmit interrupt,
two cycles after being set).
4. Write UxTXREG as a 16-bit value only.
5. A word write to UxTXREG triggers the transfer
of the 9-bit data to the TSR. The serial bit stream
will start shifting out with the first rising edge of
the baud clock.
6. A transmit interrupt will be generated as per the
setting of control bit, UTXISELx.
18.4 Break and Sync Transmit
Sequence
The following sequence will send a message frame
header made up of a Break, followed by an auto-baud
Sync byte.
1. Configure the UARTx for the desired mode.
2. Set UTXEN and UTXBRK – this sets up the
Break character.
3. Load the UxTXREG with a dummy character to
initiate transmission (value is ignored).
4. Write ‘55h’ to UxTXREG – loads the Sync
character into the transmit FIFO.
5. After the Break has been sent, the UTXBRK bit
is reset by hardware. The Sync character now
transmits.
18.5 Receiving in 8-Bit or 9-Bit Data
Mode
1. Set up the UARTx (as described in Section 18.2
“Transmitting in 8-Bit Data Mode”).
2. Enable the UARTx.
3. A receive interrupt will be generated when one
or more data characters have been received, as
per interrupt control bit, URXISELx.
4. Read the OERR bit to determine if an overrun
error has occurred. The OERR bit must be reset
in software.
5. Read UxRXREG.
The act of reading the UxRXREG character will move
the next character to the top of the receive FIFO,
including a new set of PERR and FERR values.
18.6 Operation of UxCTS and UxRT S
Control Pins
UARTx Clear-to-Send (UxCTS) and Request-to-Send
(UxRTS) are the two hardware-controlled pins that are
associated with the UARTx module. These two pins
allow the UARTx to operate in Simplex and Flow Con-
trol modes. They are implemented to control the
transmission and reception between the Data Terminal
Equipment (DTE). The UEN<1:0> bits in the UxMODE
register configure these pins.
18.7 Infrared Support
The UARTx module provides two types of infrared
UARTx support: one is the IrDA clock output to support
an external IrDA encoder and decoder device (legacy
module support), and the other is the full implementation
of the IrDA encoder and decoder.
As the IrDA modes require a 16x baud clock, they will
only work when the BRGH bit (UxMODE<3>) is ‘0’.
18.7.1 EXTERNAL IrDA SUPPORT – IrDA
CLOCK OUTPUT
To support external IrDA encoder and decoder devices,
the UxBCLK pin (same as the UxRTS pin) can be
configured to generate the 16x baud clock. When
UEN<1:0> = 11, the UxBCLK pin will output the 16x
baud clock if the UARTx module is enabled; it can be
used to support the IrDA codec chip.
18.7.2 BUILT-IN IrDA ENCODER AND
DECODER
The UARTx has full implementation of the IrDA
encoder and decoder as part of the UARTx module.
The built-in IrDA encoder and decoder functionality is
enabled using the IREN bit (UxMODE<12>). When
enabled (IREN = 1), the receive pin (UxRX) acts as the
input from the infrared receiver. The transmit pin
(UxTX) acts as the output to the infrared transmitter.
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DS39995C-page 180 2011-2012 Microchip Technology Inc.
REGISTER 18-1: UxMODE: UARTx MODE REGISTER
R/W-0 U-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0(2)R/W-0(2)
UARTEN — USIDL IREN(1)RTSMD — UEN1 UEN0
bit 15 bit 8
R/C-0, HC R/W-0 R/W-0, HC R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
WAKE LPBACK ABAUD RXINV BRGH PDSEL1 PDSEL0 STSEL
bit 7 bit 0
Legend: C = Clearable bit HC = Hardware Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 UARTEN: UARTx Enable bit
1 = UARTx is enabled; all UARTx pins are controlled by UARTx, as defined by UEN<1:0>
0 = UARTx is disabled; all UARTx pins are controlled by port latches; UARTx power consumption is
minimal
bit 14 Unimplemented: Read as ‘0’
bit 13 USIDL: Stop in Idle Mode bit
1 = Discontinues module operation when the device enters Idle mode
0 = Continues module operation in Idle mode
bit 12 IREN: IrDA® Encoder and Decoder Enable bit(1)
1 = IrDA encoder and decoder are enabled
0 = IrDA encoder and decoder are disabled
bit 11 RTSMD: Mode Selection for UxRTS Pin bit
1 =UxRTS pin is in Simplex mode
0 =UxRTS
pin is in Flow Control mode
bit 10 Unimplemented: Read as ‘0’
bit 9-8 UEN<1:0>: UARTx Enable bits(2)
11 = UxTX, UxRX and UxBCLK pins are enabled and used; UxCTS pin is controlled by port latches
10 = UxTX, UxRX, UxCTS and UxRTS pins are enabled and used
01 = UxTX, UxRX and UxRTS pins are enabled and used; UxCTS pin is controlled by port latches
00 = UxTX and UxRX pins are enabled and used; UxCTS and UxRTS/UxBCLK pins are controlled by
port latches
bit 7 WAKE: Wake-up on Start Bit Detect During Sleep Mode Enable bit
1 = UARTx will continue to sample the UxRX pin; interrupt is generated on the falling edge, bit is
cleared in hardware on the following rising edge
0 = No wake-up is enabled
bit 6 LPBACK: UARTx Loopback Mode Select bit
1 = Enables Loopback mode
0 = Loopback mode is disabled
bit 5 ABAUD: Auto-Baud Enable bit
1 = Enables baud rate measurement on the next character – requires reception of a Sync field (55h);
cleared in hardware upon completion
0 = Baud rate measurement is disabled or completed
bit 4 RXINV: Receive Polarity Inversion bit
1 = UxRX Idle state is ‘0’
0 = UxRX Idle state is ‘1’
Note 1: This feature is is only available for the 16x BRG mode (BRGH = 0).
2: The bit availability depends on the pin availability.
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bit 3 BRGH: High Baud Rate Enable bit
1 = BRG generates 4 clocks per bit period (4x baud clock, High-Speed mode)
0 = BRG generates 16 clocks per bit period (16x baud clock, Standard mode)
bit 2-1 PDSEL<1:0>: Parity and Data Selection bits
11 = 9-bit data, no parity
10 = 8-bit data, odd parity
01 = 8-bit data, even parity
00 = 8-bit data, no parity
bit 0 STSEL: Stop Bit Selection bit
1 = Two Stop bits
0 = One Stop bit
REGISTER 18-1: UxMODE: UARTx MODE REGISTER (CONTINUED)
Note 1: This feature is is only available for the 16x BRG mode (BRGH = 0).
2: The bit availability depends on the pin availability.
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REGISTER 18-2: UxSTA: UARTx STATUS AND CONTROL REGISTER
R/W-0 R/W-0 R/W-0 U-0 R/W-0, HC R/W-0 R-0, HSC R-1, HSC
UTXISEL1 UTXINV UTXISEL0 — UTXBRK UTXEN UTXBF TRMT
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R-1, HSC R-0, HSC R-0, HSC R/C-0, HS R-0, HSC
URXISEL1 URXISEL0 ADDEN RIDLE PERR FERR OERR URXDA
bit 7 bit 0
Legend: HC = Hardware Clearable bit
HS = Hardware Settable bit C = Clearable bit HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15,13 UTXISEL<1:0>: Transmission Interrupt Mode Selection bits
11 = Reserved; do not use
10 = Interrupt when a character is transferred to the Transmit Shift Register (TSR) and as a result, the
transmit buffer becomes empty
01 = Interrupt when the last character is shifted out of the Transmit Shift Register; all transmit operations
are completed
00 = Interrupt when a character is transferred to the Transmit Shift Register (this implies there is at
least one character open in the transmit buffer)
bit 14 UTXINV: IrDA® Encoder Transmit Polarity Inversion bit
If IREN = 0:
1 = UxTX Idle ‘0’
0 = UxTX Idle ‘1’
If IREN = 1:
1 = UxTX Idle ‘1’
0 = UxTX Idle ‘0’
bit 12 Unimplemented: Read as ‘0’
bit 11 UTXBRK: Transmit Break bit
1 = Sends Sync Break on next transmission – Start bit, followed by twelve ‘0’ bits, followed by Stop bit;
cleared by hardware upon completion
0 = Sync Break transmission is disabled or completed
bit 10 UTXEN: Transmit Enable bit
1 = Transmit is enabled; UxTX pin is controlled by UARTx
0 = Transmit is disabled; any pending transmission is aborted and the buffer is reset. UxTX pin is
controlled by the PORT register.
bit 9 UTXBF: Transmit Buffer Full Status bit (read-only)
1 = Transmit buffer is full
0 = Transmit buffer is not full, at least one more character can be written
bit 8 TRMT: Transmit Shift Register Empty bit (read-only)
1 = Transmit Shift Register is empty and the transmit buffer is empty (the last transmission
has completed)
0 = Transmit Shift Register is not empty; a transmission is in progress or queued
bit 7-6 URXISEL<1:0>: Receive Interrupt Mode Selection bits
11 = Interrupt is set on a RSR transfer, making the receive buffer full (i.e., has 4 data characters)
10 = Interrupt is set on a RSR transfer, making the receive buffer 3/4 full (i.e., has 3 data characters)
0x = Interrupt is set when any character is received and transferred from the RSR to the receive buffer;
receive buffer has one or more characters.
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bit 5 ADDEN: Address Character Detect bit (bit 8 of received data = 1)
1 = Address Detect mode is enabled; if 9-bit mode is not selected, this does not take effect
0 = Address Detect mode is disabled
bit 4 RIDLE: Receiver Idle bit (read-only)
1 = Receiver is Idle
0 = Receiver is active
bit 3 PERR: Parity Error Status bit (read-only)
1 = Parity error has been detected for the current character (character at the top of the receive FIFO)
0 = Parity error has not been detected
bit 2 FERR: Framing Error Status bit (read-only)
1 = Framing error has been detected for the current character (character at the top of the receive FIFO)
0 = Framing error has not been detected
bit 1 OERR: Receive Buffer Overrun Error Status bit (clear/read-only)
1 = Receive buffer has overflowed
0 = Receive buffer has not overflowed (clearing a previously set OERR bit (10 transition) will reset
the receiver buffer and the RSR to the empty state)
bit 0 URXDA: Receive Buffer Data Available bit (read-only)
1 = Receive buffer has data; at least one more characters can be read
0 = Receive buffer is empty
REGISTER 18-2: UxSTA: UARTx ST ATUS AND CONTROL REGISTER (CONTINUED)
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DS39995C-page 184 2011-2012 Microchip Technology Inc.
REGISTER 18-3: UxTXREG: UARTx TRANSMIT REGISTER
U-x U-x U-x U-x U-x U-x U-x W-x
— — — — — — —UTX8
bit 15 bit 8
W-x W-x W-x W-x W-x W-x W-x W-x
UTX7 UTX6 UTX5 UTX4 UTX3 UTX2 UTX1 UTX0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-9 Unimplemented: Read as ‘0’
bit 8 UTX8: Data of the Transmitted Character bit (in 9-bit mode)
bit 7-0 UTX<7:0>: Data of the Transmitted Character bits
REGISTER 18-4: UxRXREG: UARTx RECEIVE REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R-0, HSC
— — — — — — —URX8
bit 15 bit 8
R-0, HSC R-0, HSC R-0, HSC R-0, HSC R-0, HSC R-0, HSC R-0, HSC R-0, HSC
URX7 URX6 URX5 URX4 URX3 URX2 URX1 URX0
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-9 Unimplemented: Read as ‘0’
bit 8 URX8: Data of the Received Character bit (in 9-bit mode)
bit 7-0 URX<7:0>: Data of the Received Character bits
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19.0 REAL-TIME CLOCK AND
CALENDAR (RTCC)
The RTCC provides the user with a Real-Time Clock
and Calendar (RTCC) function that can be calibrated.
Key features of the RTCC module are:
• Operates in Deep Sleep mode
• Selectable clock source
• Provides hours, minutes and seconds using
24-hour format
• Visibility of one half second period
• Provides calendar – weekday, date, month and
year
• Alarm-configurable for half a second, one second,
10 seconds, one minute, 10 minutes, one hour,
one day, one week, one month or one year
• Alarm repeat with decrementing counter
• Alarm with indefinite repeat chime
• Year 2000 to 2099 leap year correction
• BCD format for smaller software overhead
• Optimized for long term battery operation
• User calibration of the 32.768 kHz clock
crystal/32K INTRC frequency with periodic
auto-adjust
• Optimized for long term battery operation
• Fractional second synchronization
• Calibration to within ±2.64 seconds error per
month
• Calibrates up to 260 ppm of crystal error
• Ability to periodically wake up external devices
without CPU intervention (external power control)
• Power control output for external circuit control
• Calibration takes effect every 15 seconds
• Runs from any one of the following:
- External Real-Time Clock of 32.768 kHz
- Internal 31.25 kHz LPRC Clock
- 50 Hz or 60 Hz External Input
19.1 RTCC Source Clock
The user can select between the SOSC crystal
oscillator, LPRC internal oscillator or an external
50 Hz/60 Hz power line input as the clock reference for
the RTCC module. This gives the user an option to trade
off system cost, accuracy and power consumption,
based on the overall system needs.
FIGURE 19-1: RTCC BLOCK DIAGRAM
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the
Real-Time Clock and Calendar, refer to the
“PIC24F Family Reference Manual”,
Section 29. “Real-Time Clock and
Calendar (RTCC)” (DS39696).
RTCC Clock Domain CPU Clock Domain
RTCC
RTCC Prescalers
RTCC Timer
Comparator
Alarm Registers with Masks
Repeat Counter
0.5 Sec
RTCC Interrupt Logic
ALRMVAL
RTCVAL
ALCFGRPT
RCFGCAL
Alarm
Event
YEAR
MTHDY
WKDYHR
MINSEC
ALMTHDY
ALWDHR
ALMINSEC
RTCC
Interrupt
RTCOUT<1:0>
RTCOE
Clock Source
1s
Pin
Alarm Pulse
Input from
SOSC/LPRC
Oscillator or
External Source
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DS39995C-page 186 2011-2012 Microchip Technology Inc.
19.2 RTCC Module Registers
The RTCC module registers are organized into three
categories:
• RTCC Control Registers
• RTCC Value Registers
• Alarm Value Registers
19.2.1 REGISTER MAPPING
To limit the register interface, the RTCC Timer and
Alarm Time registers are accessed through
corresponding register pointers. The RTCC Value
register window (RTCVALH and RTCVALL) uses the
RTCPTR bits (RCFGCAL<9:8>) to select the desired
Timer register pair (see Table 19-1).
By writing the RTCVALH byte, the RTCC Pointer value,
the RTCPTR<1:0> bits decrement by one until they
reach ‘00’. Once they reach ‘00’, the MINUTES and
SECONDS value will be accessible through RTCVALH
and RTCVALL until the pointer value is manually
changed.
TABLE 19-1: RTCVAL REGISTER MAPPING
The Alarm Value register window (ALRMVALH
and ALRMVALL) uses the ALRMPTRx bits
(ALCFGRPT<9:8>) to select the desired Alarm
register pair (see Table 19-2).
By writing the ALRMVALH byte, the Alarm Pointer
value (ALRMPTR<1:0> bits) decrements by one until
they reach ‘00’. Once they reach ‘00’, the ALRMMIN
and ALRMSEC value will be accessible through
ALRMVALH and ALRMVALL, until the pointer value is
manually changed.
TABLE 19-2: ALRMVAL REGISTER
MAPPING
Considering that the 16-bit core does not distinguish
between 8-bit and 16-bit read operations, the user must
be aware that when reading either the ALRMVALH or
ALRMVALL bytes, the ALRMPTR<1:0> value will be
decremented. The same applies to the RTCVALH or
RTCVALL bytes with the RTCPTR<1:0> being
decremented.
19.2.2 WRITE LOCK
In order to perform a write to any of the RTCC Timer
registers, the RTCWREN bit (RTCPWC<13>) must be
set (see Example 19-1).
19.2.3 SELECTING RTCC CLOCK SOURCE
There are four reference source clock options that can
be selected for the RTCC using the RTCCSEL<1:0>
bits: 00 = Secondary Oscillator, 01 = LPRC, 10 = 50 Hz
External Clock and 11 = 60 Hz External Clock.
EXAMPLE 19-1: SETTING THE RTCWREN BIT
RTCPTR<1:0> RTCC Value Register Window
RTCVAL<15:8> RTCVAL<7:0>
00 MINUTES SECONDS
01 WEEKDAY HOURS
10 MONTH DAY
11 — YEAR
ALRMPTR
<1:0>
Alarm Value Register Window
ALRMVAL<15:8> ALRMVAL<7:0>
00 ALRMMIN ALRMSEC
01 ALRMWD ALRMHR
10 ALRMMNTH ALRMDAY
11 PWCSTAB PWCSAMP
Note: This only applies to read operations and
not write operations.
Note: To avoid accidental writes to the timer, it is
recommended that the RTCWREN bit
(RCFGCAL<13>) is kept clear at any
other time. For the RTCWREN bit to be
set, there is only one instruction cycle time
window allowed between the 55h/AA
sequence and the setting of RTCWREN.
Therefore, it is recommended that code
follow the procedure in Example 19-1.
asm volatile (“push w7”);
asm volatile (“push w8”);
asm volatile (“disi #5”);
asm volatile (“mov #0x55, w7”);
asm volatile (“mov w7, _NVMKEY”);
asm volatile (“mov #0xAA, w8”);
asm volatile (“mov w8, _NVMKEY”);
asm volatile (“bset _RCFGCAL, #13”); //set the RTCWREN bit
asm volatile (“pop w8”);
asm volatile (“pop w7”);
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19.2.4 RTCC CONTROL REGISTERS
REGISTER 19-1:
RCFGCAL: RTCC CALIBRATION AND CONFIGURATION REGISTER
(1)
R/W-0 U-0 R/W-0 R-0, HSC R-0, HSC R/W-0 R/W-0 R/W-0
RTCEN(2)— RTCWREN RTCSYNC HALFSEC(3)RTCOE RTCPTR1 RTCPTR0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CAL7 CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 RTCEN: RTCC Enable bit(2)
1 = RTCC module is enabled
0 = RTCC module is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 RTCWREN: RTCC Value Registers Write Enable bit
1 = RTCVALH and RTCVALL registers can be written to by the user
0 = RTCVALH and RTCVALL registers are locked out from being written to by the user
bit 12 RTCSYNC: RTCC Value Registers Read Synchronization bit
1 = RTCVALH, RTCVALL and ALCFGRPT registers can change while reading due to a rollover ripple
resulting in an invalid data read. If the register is read twice and results in the same data, the data
can be assumed to be valid.
0 = RTCVALH, RTCVALL or ALCFGRPT registers can be read without concern over a rollover ripple
bit 11 HALFSEC: Half Second Status bit(3)
1 = Second half period of a second
0 = First half period of a second
bit 10 RTCOE: RTCC Output Enable bit
1 = RTCC output is enabled
0 = RTCC output is disabled
bit 9-8 RTCPTR<1:0>: RTCC Value Register Window Pointer bits
Points to the corresponding RTCC Value registers when reading the RTCVALH and RTCVALL registers.
The RTCPTR<1:0> value decrements on every read or write of RTCVALH until it reaches ‘00’.
RTCVAL<15:8>:
00 = MINUTES
01 = WEEKDAY
10 = MONTH
11 = Reserved
RTCVAL<7:0>:
00 = SECONDS
01 = HOURS
10 = DAY
11 = YEAR
Note 1: The RCFGCAL register is only affected by a POR.
2: A write to the RTCEN bit is only allowed when RTCWREN = 1.
3: This bit is read-only; it is cleared to ‘0’ on a write to the lower half of the MINSEC register.
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bit 7-0 CAL<7:0>: RTC Drift Calibration bits
01111111 = Maximum positive adjustment; adds 508 RTC clock pulses every one minute
.
.
.
00000001 = Minimum positive adjustment; adds 4 RTC clock pulses every one minute
00000000 = No adjustment
11111111 = Minimum negative adjustment; subtracts 4 RTC clock pulses every one minute
.
.
.
10000000 = Maximum negative adjustment; subtracts 512 RTC clock pulses every one minute
REGISTER 19-1:
RCFGCAL: RTCC CALIBRATION AND CONFIGURATION REGISTER
(1)
(CONTINUED)
Note 1: The RCFGCAL register is only affected by a POR.
2: A write to the RTCEN bit is only allowed when RTCWREN = 1.
3: This bit is read-only; it is cleared to ‘0’ on a write to the lower half of the MINSEC register.
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REGISTER 19-2: RTCPWC: RTCC CONFIGURATION REGISTER 2(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
PWCEN PWCPOL PWCCPRE PWCSPRE RTCCLK1(2) RTCCLK0(2)RTCOUT1 RTCOUT0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 PWCEN: Power Control Enable bit
1 = Power control is enabled
0 = Power control is disabled
bit 14 PWCPOL: Power Control Polarity bit
1 = Power control output is active-high
0 = Power control output is active-low
bit 13 PWCCPRE: Power Control Control/Stability Prescaler bits
1 = PWC stability window clock is divide-by-2 of source RTCC clock
0 = PWC stability window clock is divide-by-1 of source RTCC clock
bit 12 PWCSPRE: Power Control Sample Prescaler bits
1 = PWC sample window clock is divide-by-2 of source RTCC clock
0 = PWC sample window clock is divide-by-1 of source RTCC clock
bit 11-10 RTCCLK<1:0>: RTCC Clock Select bits(2)
Determines the source of the internal RTCC clock, which is used for all RTCC timer operations.
00 = External Secondary Oscillator (SOSC)
01 = Internal LPRC Oscillator
10 = External power line source – 50 Hz
11 = External power line source – 60 Hz
bit 9-8 RTCOUT<1:0>: RTCC Output Select bits
Determines the source of the RTCC pin output.
00 = RTCC alarm pulse
01 = RTCC seconds clock
10 = RTCC clock
11 = Power control
bit 7-0 Unimplemented: Read as ‘0’
Note 1: The RTCPWC register is only affected by a POR.
2: When a new value is written to these register bits, the Seconds Value register should also be written to
properly reset the clock prescalers in the RTCC.
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REGISTER 19-3: ALCFGRPT: ALARM CONFIGURATION REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ALRMEN CHIME AMASK3 AMASK2 AMASK1 AMASK0 ALRMPTR1 ALRMPTR0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ARPT7 ARPT6 ARPT5 ARPT4 ARPT3 ARPT2 ARPT1 ARPT0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ALRMEN: Alarm Enable bit
1 = Alarm is enabled (cleared automatically after an alarm event whenever ARPT<7:0> = 00h and
CHIME = 0)
0 = Alarm is disabled
bit 14 CHIME: Chime Enable bit
1 = Chime is enabled; ARPT<7:0> bits are allowed to roll over from 00h to FFh
0 = Chime is disabled; ARPT<7:0> bits stop once they reach 00h
bit 13-10 AMASK<3:0>: Alarm Mask Configuration bits
0000 = Every half second
0001 = Every second
0010 = Every 10 seconds
0011 = Every minute
0100 = Every 10 minutes
0101 = Every hour
0110 = Once a day
0111 = Once a week
1000 = Once a month
1001 = Once a year (except when configured for February 29th, once every 4 years)
101x = Reserved – do not use
11xx = Reserved – do not use
bit 9-8 ALRMPTR<1:0>: Alarm Value Register Window Pointer bits
Points to the corresponding Alarm Value registers when reading the ALRMVALH and ALRMVALL registers.
The ALRMPTR<1:0> value decrements on every read or write of ALRMVALH until it reaches ‘00’.
ALRMVAL<15:8>:
00 = ALRMMIN
01 = ALRMWD
10 = ALRMMNTH
11 = Unimplemented
ALRMVAL<7:0>:
00 = ALRMSEC
01 = ALRMHR
10 = ALRMDAY
11 = Unimplemented
bit 7-0 ARPT<7:0>: Alarm Repeat Counter Value bits
11111111 = Alarm will repeat 255 more times
.
.
.
00000000 = Alarm will not repeat
The counter decrements on any alarm event; it is prevented from rolling over from 00h to FFh unless
CHIME = 1.
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19.2.5 RTCVAL REGISTER MAPPINGS
REGISTER 19-4: YEAR: YEAR VALUE REGISTER(1)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
YRTEN3 YRTEN2 YRTEN2 YRTEN1 YRONE3 YRONE2 YRONE1 YRONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-8 Unimplemented: Read as ‘0’
bit 7-4 YRTEN<3:0>: Binary Coded Decimal Value of Year’s Tens Digit bits
Contains a value from 0 to 9.
bit 3-0 YRONE<3:0>: Binary Coded Decimal Value of Year’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to the YEAR register is only allowed when RTCWREN = 1.
REGISTER 19-5: MTHDY: MONTH AND DAY VALUE REGISTER(1)
U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x
— — —
MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0
bit 15 bit 8
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— —
DAYTEN1 DAYTEN0 DAYONE3 DAYONE2 DAYONE1 DAYONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-13 Unimplemented: Read as ‘0’
bit 12 MTHTEN0: Binary Coded Decimal Value of Month’s Tens Digit bit
Contains a value of ‘0’ or ‘1’.
bit 11-8 MTHONE<3:0>: Binary Coded Decimal Value of Month’s Ones Digit bits
Contains a value from 0 to 9.
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 DAYTEN<1:0>: Binary Coded Decimal Value of Day’s Tens Digit bits
Contains a value from 0 to 3.
bit 3-0 DAYONE<3:0>: Binary Coded Decimal Value of Day’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
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REGISTER 19-6: WKDYHR: WEEKDAY AND HOURS VALUE REGISTER(1)
U-0 U-0 U-0 U-0 U-0 R/W-x R/W-x R/W-x
— — — — — WDAY2 WDAY1 WDAY0
bit 15 bit 8
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
—— HRTEN1 HRTEN0 HRONE3 HRONE2 HRONE1 HRONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 WDAY<2:0>: Binary Coded Decimal Value of Weekday Digit bits
Contains a value from 0 to 6.
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 HRTEN<1:0>: Binary Coded Decimal Value of Hour’s Tens Digit bits
Contains a value from 0 to 2.
bit 3-0 HRONE<3:0>: Binary Coded Decimal Value of Hour’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
REGISTER 19-7: MINSEC: MINUTES AND SECONDS VALUE REGISTER
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— MINTEN2 MINTEN1 MINTEN0 MINONE3 MINONE2 MINONE1 MINONE0
bit 15 bit 8
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— SECTEN2 SECTEN1 SECTEN0 SECONE3 SECONE2 SECONE1 SECONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 MINTEN<2:0>: Binary Coded Decimal Value of Minute’s Tens Digit bits
Contains a value from 0 to 5.
bit 11-8 MINONE<3:0>: Binary Coded Decimal Value of Minute’s Ones Digit bits
Contains a value from 0 to 9.
bit 7 Unimplemented: Read as ‘0’
bit 6-4 SECTEN<2:0>: Binary Coded Decimal Value of Second’s Tens Digit bits
Contains a value from 0 to 5.
bit 3-0 SECONE<3:0>: Binary Coded Decimal Value of Second’s Ones Digit bits
Contains a value from 0 to 9.
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19.2.6 ALRMVAL REGISTER MAPPINGS
REGISTER 19-8: ALMTHDY: ALARM MONTH AND DAY VALUE REGISTER(1)
U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x
— — —
MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0
bit 15 bit 8
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— —
DAYTEN1 DAYTEN0 DAYONE3 DAYONE2 DAYONE1 DAYONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-13 Unimplemented: Read as ‘0’
bit 12 MTHTEN0: Binary Coded Decimal Value of Month’s Tens Digit bit
Contains a value of ‘0’ or ‘1’.
bit 11-8 MTHONE<3:0>: Binary Coded Decimal Value of Month’s Ones Digit bits
Contains a value from 0 to 9.
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 DAYTEN<1:0>: Binary Coded Decimal Value of Day’s Tens Digit bits
Contains a value from 0 to 3.
bit 3-0 DAYONE<3:0>: Binary Coded Decimal Value of Day’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
REGISTER 19-9: ALWDHR: ALARM WEEKDAY AND HOURS VALUE REGISTER(1)
U-0 U-0 U-0 U-0 U-0 R/W-x R/W-x R/W-x
— — — — — WDAY2 WDAY1 WDAY0
bit 15 bit 8
U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
—— HRTEN1 HRTEN0 HRONE3 HRONE2 HRONE1 HRONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-11 Unimplemented: Read as ‘0’
bit 10-8 WDAY<2:0>: Binary Coded Decimal Value of Weekday Digit bits
Contains a value from 0 to 6.
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 HRTEN<1:0>: Binary Coded Decimal Value of Hour’s Tens Digit bits
Contains a value from 0 to 2.
bit 3-0 HRONE<3:0>: Binary Coded Decimal Value of Hour’s Ones Digit bits
Contains a value from 0 to 9.
Note 1: A write to this register is only allowed when RTCWREN = 1.
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REGISTER 19-10: ALMINSEC: ALARM MINUTES AND SECONDS VALUE REGISTER
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— MINTEN2 MINTEN1 MINTEN0 MINONE3 MINONE2 MINONE1 MINONE0
bit 15 bit 8
U-0 R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
— SECTEN2 SECTEN1 SECTEN0 SECONE3 SECONE2 SECONE1 SECONE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-12 MINTEN<2:0>: Binary Coded Decimal Value of Minute’s Tens Digit bits
Contains a value from 0 to 5.
bit 11-8 MINONE<3:0>: Binary Coded Decimal Value of Minute’s Ones Digit bits
Contains a value from 0 to 9.
bit 7 Unimplemented: Read as ‘0’
bit 6-4 SECTEN<2:0>: Binary Coded Decimal Value of Second’s Tens Digit bits
Contains a value from 0 to 5.
bit 3-0 SECONE<3:0>: Binary Coded Decimal Value of Second’s Ones Digit bits
Contains a value from 0 to 9.
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REGISTER 19-11: RTCCSWT: CONTROL/SAMPLE WINDOW TIMER REGISTER(1)
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
PWCSTAB7 PWCSTAB6 PWCSTAB5 PWCSTAB4 PWCSTAB3 PWCSTAB2 PWCSTAB1 PWCSTAB0
bit 15 bit 8
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
PWCSAMP7 PWCSAMP6 PWCSAMP5 PWCSAMP4 PWCSAMP3 PWCSAMP2 PWCSAMP1 PWCSAMP0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-8 PWCSTAB<7:0>: PWM Stability Window Timer bits
11111111 = Stability window is 255 TPWCCLK clock periods
.
.
.
00000000 = Stability window is 0 TPWCCLK clock periods
The sample window starts when the alarm event triggers. The stability window timer starts counting
from every alarm event when PWCEN = 1.
bit 7-0 PWCSAMP<7:0>: PWM Sample Window Timer bits
11111111 = Sample window is always enabled, even when PWCEN = 0
11111110 = Sample window is 254 TPWCCLK clock periods
.
.
.
00000000 = Sample window is 0 TPWCCLK clock periods
The sample window timer starts counting at the end of the stability window when PWCEN = 1. If
PWCSTAB<7:0> = 00000000, the sample window timer starts counting from every alarm event when
PWCEN = 1.
Note 1: A write to this register is only allowed when RTCWREN = 1.
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19.3 Calibration
The real-time crystal input can be calibrated using the
periodic auto-adjust feature. When properly calibrated,
the RTCC can provide an error of less than 3 seconds
per month. This is accomplished by finding the number
of error clock pulses and storing the value into the
lower half of the RCFGCAL register. The 8-bit signed
value, loaded into the lower half of RCFGCAL, is multi-
plied by four and will be either added or subtracted from
the RTCC timer, once every minute. Refer to the steps
below for RTCC calibration:
1. Using another timer resource on the device, the
user must find the error of the 32.768 kHz crystal.
2. Once the error is known, it must be converted to
the number of error clock pulses per minute.
3. a) If the oscillator is faster than ideal (negative
result form Step 2), the RCFGCAL register value
must be negative. This causes the specified
number of clock pulses to be subtracted from
the timer counter, once every minute.
b) If the oscillator is slower than ideal (positive
result from Step 2), the RCFGCAL register value
must be positive. This causes the specified
number of clock pulses to be subtracted from
the timer counter, once every minute.
EQUATION 19-1:
Writes to the lower half of the RCFGCAL register
should only occur when the timer is turned off, or
immediately after the rising edge of the seconds pulse,
except when SECONDS = 00, 15, 30 or 45. This is due
to the auto-adjust of the RTCC at 15 second intervals.
19.4 Alarm
• Configurable from half second to one year
• Enabled using the ALRMEN bit
(ALCFGRPT<15>)
• One-time alarm and repeat alarm options are
available
19.4.1 CONFIGURING THE ALARM
The alarm feature is enabled using the ALRMEN bit.
This bit is cleared when an alarm is issued. Writes to
ALRMVAL should only take place when ALRMEN = 0.
As shown in Figure 19-2, the interval selection of the
alarm is configured through the AMASKx bits
(ALCFGRPT<13:10>). These bits determine which and
how many digits of the alarm must match the clock
value for the alarm to occur.
The alarm can also be configured to repeat based on a
preconfigured interval. The amount of times this
occurs, once the alarm is enabled, is stored in the
ARPT<7:0> bits (ALCFGRPT<7:0>). When the value
of the ARPTx bits equals 00h and the CHIME bit
(ALCFGRPT<14>) is cleared, the repeat function is
disabled, and only a single alarm will occur. The alarm
can be repeated up to 255 times by loading
ARPT<7:0> with FFh.
After each alarm is issued, the value of the ARPTx bits
is decremented by one. Once the value has reached
00h, the alarm will be issued one last time, after which,
the ALRMEN bit will be cleared automatically and the
alarm will turn off.
Indefinite repetition of the alarm can occur if the CHIME
bit = 1. Instead of the alarm being disabled when the value
of the ARPTx bits reaches 00h, it rolls over to FFh and
continues counting indefinitely while CHIME is set.
19.4.2 ALARM INTERRUPT
At every alarm event, an interrupt is generated. In
addition, an alarm pulse output is provided that
operates at half the frequency of the alarm. This output
is completely synchronous to the RTCC clock and can
be used as a trigger clock to other peripherals.
(Ideal Frequency† – Measured Frequency) *
60 = Clocks per Minute
† Ideal Frequency = 32,768 Hz
Note: It is up to the user to include, in the error
value, the initial error of the crystal: drift
due to temperature and drift due to crystal
aging.
Note: Changing any of the registers, other than
the RCFGCAL and ALCFGRPT registers,
and the CHIME bit while the alarm is
enabled (ALRMEN = 1), can result in a
false alarm event leading to a false alarm
interrupt. To avoid a false alarm event, the
timer and alarm values should only be
changed while the alarm is disabled
(ALRMEN = 0). It is recommended that
the ALCFGRPT register and CHIME bit be
changed when RTCSYNC = 0.
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FIGURE 19-2: ALARM MASK SETTINGS
19.5 POWER CONTROL
The RTCC includes a power control feature that allows
the device to periodically wake-up an external device,
wait for the device to be stable before sampling wake-up
events from that device and then shut down the external
device. This can be done completely autonomously by
the RTCC, without the need to wake from the current
low-power mode (Sleep, Deep Sleep, etc.).
To enable this feature, the RTCC must be enabled
(RTCEN = 1), the PWCEN register bit must be set and
the RTCC pin must be driving the PWC control signal
(RTCOE = 1 and RTCSECSEL<1:0> = 11).
The polarity of the PWC control signal may be chosen
using the PWCP register bit. Active-low or active-high
may be used with the appropriate external switch to
turn on or off the power to one or more external
devices. The active-low setting may also be used in
conjunction with an open-drain setting on the RTCC
pin. This setting is able to drive the GND pin(s) of the
external device directly (with the appropriate external
VDD pull-up device), without the need for external
switches. Finally, the CHIME bit should be set to enable
the PWC periodicity.
Note 1: Annually, except when configured for February 29.
s
ss
mss
mm s s
hh mm ss
dhhmmss
dd hh mm ss
mm d d h h mm s s
Day of
the
Week Month Day Hours Minutes Seconds
Alarm Mask Setting
(AMASK<3:0>)
0000 - Every half second
0001 - Every second
0010 - Every 10 seconds
0011 - Every minute
0100 - Every 10 minutes
0101 - Every hour
0110 - Every day
0111 - Every week
1000 - Every month
1001 - Every year(1)
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NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 199
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20.0 32-BIT PROGRAMMABLE
CYCLIC REDUNDANCY CHECK
(CRC) GENERATOR
The programmable CRC generator provides a
hardware implemented method of quickly generating
checksums for various networking and security
applications. It offers the following features:
• User-programmable CRC polynomial equation,
up to 32 bits
• Programmable shift direction (little or big-endian)
• Independent data and polynomial lengths
• Configurable interrupt output
• Data FIFO
A simplified block diagram of the CRC generator is
shown in Figure 20-1. A simple version of the CRC shift
engine is shown in Figure 20-2.
FIGURE 20-1: CRC BLOCK DIAGRAM
FIGURE 20-2: CRC SHIFT ENGINE DETAIL
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 41. “32-Bit Programmable Cyclic
Redundancy Check (CRC)” (DS39729).
Variable FIFO
(4x32, 8x16 or 16x8)
CRCDATH CRCDATL
Shift Buffer
CRC Shift Engine
CRCWDATH CRCWDATL
LENDIAN
10
CRCISEL
1
0
FIFO Empty Event
Shift Complete Event
Set CRCIF
2 * FCY Shift Clock
CRCWDATH CRCWDATL
Bit 0 Bit 1 Bit n(2)
X(1)(1)
Read/Write Bus
Shift Buffer
Data Bit 2
X(2)(1) X(n)(1)
Note 1: Each XOR stage of the shift engine is programmable; see text for details.
2: Polynomial length n is determined by ([PLEN<4:0>] + 1)
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DS39995C-page 200 2011-2012 Microchip Technology Inc.
20.1 User Interface
20.1.1 POLYNOMIAL INTERFACE
The CRC module can be programmed for CRC
polynomials of up to the 32nd order, using up to 32 bits.
Polynomial length, which reflects the highest exponent
in the equation, is selected by the PLEN<4:0> bits
(CRCCON2<4:0>).
The CRCXORL and CRCXORH registers control which
exponent terms are included in the equation. Setting a
particular bit includes that exponent term in the
equation. Functionally, this includes an XOR operation
on the corresponding bit in the CRC engine. Clearing
this bit disables the XOR.
For example, consider two CRC polynomials, one is a
16-bit equation and the other is a 32-bit equation:
To program these polynomials into the CRC generator,
set the register bits, as shown in Table 20-1.
Note that the appropriate positions are set to ‘1’ to
indicate that they are used in the equation (for example,
X26 and X23). The 0 bit required by the equation is
always XORed; thus, X0 is a don’t care. For a
polynomial of length, N, it is assumed that the Nth bit will
always be used, regardless of the bit setting. Therefore,
for a polynomial length of 32, there is no 32nd bit in the
CRCXOR register.
20.1.2 DATA INTERFACE
The module incorporates a FIFO that works with a
variable data width. Input data width can be configured
to any value, between 1 and 32 bits, using the
DWIDTH<4:0> bits (CRCCON2<12:8>). When the
data width is greater than 15, the FIFO is 4 words deep.
When the DWIDTH value is between 15 and 8, the
FIFO is 8 words deep. When the DWIDTH value is less
than 8, the FIFO is 16 words deep.
The data for which the CRC is to be calculated must
first be written into the FIFO. Even if the data width is
less than 8, the smallest data element that can be
written into the FIFO is one byte. For example, if the
DWIDTH value is 5, then the size of the data is
DWIDTH + 1 or 6. The data is written as a whole byte;
the two unused upper bits are ignored by the module.
Once data is written into the MSb of the CRCDAT
registers (that is, MSb as defined by the data width),
the value of the VWORD<4:0> bits (CRCCON1<12:8>)
increments by one. For example, if the DWIDTH value
is 24, the VWORDx bits will increment when bit 7 of
CRCDATH is written. Therefore, CRCDATL must
always be written before CRCDATH.
The CRC engine starts shifting data when the CRCGO
bit is set and the value of the VWORDx bits is greater
than zero. Each word is copied out of the FIFO into a
buffer register, which decrements VWORDx. The data
is then shifted out of the buffer. The CRC engine
continues shifting at a rate of two bits per instruction
cycle until the VWORDx value reaches zero. This
means that for a given data width, it takes half that
number of instructions for each word to complete the
calculation. For example, it takes 16 cycles to calculate
the CRC for a single word of 32-bit data.
When the VWORDx value reaches the maximum value
for the configured value of DWIDTH (4, 8 or 16), the
CRCFUL bit becomes set. When the VWORDx value
reaches zero, the CRCMPT bit becomes set. The FIFO
is emptied and the VWORD<4:0> bits are set to
‘00000’ whenever CRCEN is ‘0’.
At least one instruction cycle must pass, after a write to
CRCDAT, before a read of the VWORDx bits is done.
TABLE 20-1: CRC SETUP EXAMPLES FOR 16 AND 32-BIT POLYNOMIAL
x16 + x12 + x5 + 1
and
x32 + x26 + x23 + x22 + x16 + x12 + x1 1 + x10 +
x8 + x7 + x5 + x4 + x2 + x + 1
CRC Control
Bits
Bit Values
16-Bit Polynomial 32-Bit Polynomial
PLEN<4:0> 01111 11111
X<31:16> 0000 0000 0000 000x 0000 0100 1100 0001
X<15:0> 0001 0000 0010 000x 0001 1101 1011 011x
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20.1.3 DATA SHIFT DIRECTION
The LENDIAN bit (CRCCON1<3>) is used to control
the shift direction. By default, the CRC will shift data
through the engine, MSb first. Setting LENDIAN (= 1)
causes the CRC to shift data, LSb first. This setting
allows better integration with various communication
schemes and removes the overhead of reversing the
bit order in software. Note that this only changes the
direction of the data that is shifted into the engine. The
result of the CRC calculation will still be a normal CRC
result, not a reverse CRC result.
20.1.4 INTERRUPT OPERATION
The module generates an interrupt that is configurable
by the user for either of two conditions. If CRCISEL is
‘0’, an interrupt is generated when the VWORD<4:0>
bits make a transition from a value of ‘1’ to ‘0’. If
CRCISEL is ‘1’, an interrupt will be generated after the
CRC operation finishes and the module sets the
CRCGO bit to ‘0’. Manually setting CRCGO to ‘0’ will
not generate an interrupt.
20.1.5 TYPICAL OPERATION
To use the module for a typical CRC calculation:
1. Set the CRCEN bit to enable the module.
2. Configure the module for the desired operation:
a) Program the desired polynomial using the
CRCXORL and CRCXORH registers, and
the PLEN<4:0> bits.
b) Configure the data width and shift direction
using the DWIDTHx and LENDIAN bits.
c) Select the desired interrupt mode using the
CRCISEL bit.
3. Preload the FIFO by writing to the CRCDATL
and CRCDATH registers until the CRCFUL bit is
set or no data is left.
4. Clear old results by writing 00h to CRCWDATL
and CRCWDATH. CRCWDAT can also be left
unchanged to resume a previously halted
calculation.
5. Set the CRCGO bit to start calculation.
6. Write the remaining data into the FIFO as space
becomes available.
7. When the calculation completes, CRCGO is
automatically cleared. An interrupt will be
generated if CRCISEL = 1.
8. Read CRCWDATL and CRCWDATH for the
result of the calculation.
20.2 Registers
There are eight registers associated with the module:
• CRCCON1
• CRCCON2
• CRCXORL
• CRCXORH
• CRCDATL
• CRCDATH
• CRCWDATL
• CRCWDATH
The CRCCON1 and CRCCON2 registers (Register 20-1
and Register 20-2) control the operation of the module,
and configure the various settings. The CRCXOR
registers (Register 20-3 and Register 20-4) select the
polynomial terms to be used in the CRC equation. The
CRCDAT and CRCWDAT registers are each register
pairs that serve as buffers for the double-word, input
data and CRC processed output, respectively.
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DS39995C-page 202 2011-2012 Microchip Technology Inc.
REGISTER 20-1: CRCCON1: CRC CONTROL REGISTER 1
R/W-0 U-0 R/W-0 R-0 R-0 R-0 R-0 R-0
CRCEN — CSIDL VWORD4 VWORD3 VWORD2 VWORD1 VWORD0
bit 15 bit 8
R-0, HSC R-1, HSC R/W-0 R/W-0, HC R/W-0 U-0 U-0 U-0
CRCFUL CRCMPT CRCISEL CRCGO LENDIAN — — —
bit 7 bit 0
Legend: HC = Hardware Clearable bit HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CRCEN: CRC Enable bit
1 = Module is enabled
0 = Module is enabled
All state machines, pointers and CRCWDAT/CRCDAT registers are reset; other SFRs are NOT reset.
bit 14 Unimplemented: Read as ‘0’
bit 13 CSIDL: CRC Stop in Idle Mode bit
1 = Discontinues module operation when device enters Idle mode
0 = Continues module operation in Idle mode
bit 12-8 VWORD<4:0>: Pointer Value bits
Indicates the number of valid words in the FIFO, which has a maximum value of 8 when PLEN<4:0> > 7 or
16 when PLEN<4:0> 7.
bit 7 CRCFUL: FIFO Full bit
1 = FIFO is full
0 = FIFO is not full
bit 6 CRCMPT: FIFO Empty Bit
1 = FIFO is empty
0 = FIFO is not empty
bit 5 CRCISEL: CRC interrupt Selection bit
1 = Interrupt on FIFO is empty; CRC calculation is not complete
0 = Interrupt on shift is complete and CRCWDAT result is ready
bit 4 CRCGO: Start CRC bit
1 = Starts CRC serial shifter
0 = CRC serial shifter is turned off
bit 3 LENDIAN: Data Shift Direction Select bit
1 = Data word is shifted into the CRC, starting with the LSb (little endian)
0 = Data word is shifted into the CRC, starting with the MSb (big endian)
bit 2-0 Unimplemented: Read as ‘0’
2011-2012 Microchip Technology Inc. DS39995C-page 203
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REGISTER 20-2: CRCCON2: CRC CONTROL REGISTER 2
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — DWIDTH4 DWIDTH3 DWIDTH2 DWIDTH1 DWIDTH0
bit 15 bit 8
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — PLEN4 PLEN3 PLEN2 PLEN1 PLEN0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-13 Unimplemented: Read as ‘0’
bit 12-8 DWIDTH<4:0>: Data Width Select bits
Defines the width of the data word (Data Word Width = (DWIDTH<4:0>) + 1).
bit 7-5 Unimplemented: Read as ‘0’
bit 4-0 PLEN<4:0>: Polynomial Length Select bits
Defines the length of the CRC polynomial (Polynomial Length = (PLEN<4:0>) + 1).
REGISTER 20-3: CRCXORL: CRC XOR POLYNOMIAL REGISTER, LOW BYTE
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
X15 X14 X13 X12 X11 X10 X9 X8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0
X7 X6 X5 X4 X3 X2 X1 —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-1 X<15:1>: XOR of Polynomial Term Xn Enable bits
bit 0 Unimplemented: Read as ‘0’
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REGISTER 20-4: CRCXORH: CRC XOR POLYNOMIAL REGISTER, HIGH BYTE
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
X31 X30 X29 X28 X27 X26 X25 X24
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
X23 X22 X21 X20 X19 X18 X17 X16
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-0 X<31:16>: XOR of Polynomial Term Xn Enable bits
2011-2012 Microchip Technology Inc. DS39995C-page 205
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21.0 HIGH/LOW-VOLTAGE DETECT
(HLVD)
The High/Low-Voltage Detect module (HLVD) is a
programmable circuit that allows the user to specify
both the device voltage trip point and the direction of
change.
An interrupt flag is set if the device experiences an
excursion past the trip point in the direction of change.
If the interrupt is enabled, the program execution will
branch to the interrupt vector address and the software
can then respond to the interrupt.
The HLVD Control register (see Register 21-1)
completely controls the operation of the HLVD module.
This allows the circuitry to be “turned off” by the user
under software control, which minimizes the current
consumption for the device.
FIGURE 21-1: HIGH/LOW-VOLTAGE DETECT (HLVD) MODULE BLOCK DIAGRAM
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the
High/Low-Voltage Detect, refer to the
“PIC24F Family Reference Manual”,
Section 36. “High-Level Integration
with Programmable High/Low-Voltage
Detect (HLVD)” (DS39725).
Set
VDD
16-to-1 MUX
HLVDEN
HLVDL<3:0>
HLVDIN
VDD
Externally Generated
Trip Point
HLVDIF
HLVDEN
Internal Voltage
Reference
VDIR
1.024V Typical
-
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DS39995C-page 206 2011-2012 Microchip Technology Inc.
REGISTER 21-1: HLVDCON: HIGH/LOW-VOLTAGE DETECT CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 U-0 U-0 U-0
HLVDEN —HLSIDL—————
bit 15 bit 8
R/W-0
R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
VDIR BGVST IRVST — HLVDL3 HLVDL2 HLVDL1 HLVDL0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 HLVDEN: High/Low-Voltage Detect Power Enable bit
1 = HLVD is enabled
0 = HLVD is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 HLSIDL: HLVD Stop in Idle Mode bit
1 = Discontinues module operation when device enters Idle mode
0 = Continues module operation in Idle mode
bit 12-8 Unimplemented: Read as ‘0’
bit 7 VDIR: Voltage Change Direction Select bit
1 = Event occurs when voltage equals or exceeds trip point (HLVDL<3:0>)
0 = Event occurs when voltage equals or falls below trip point (HLVDL<3:0>)
bit 6 BGVST: Band Gap Voltage Stable Flag bit
1 = Indicates that the band gap voltage is stable
0 = Indicates that the band gap voltage is unstable
bit 5 IRVST: Internal Reference Voltage Stable Flag bit
1 = Indicates that the internal reference voltage is stable and the high-voltage detect logic generates
the interrupt flag at the specified voltage range
0 = Indicates that the internal reference voltage is unstable and the high-voltage detect logic will not
generate the interrupt flag at the specified voltage range, and the HLVD interrupt should not be
enabled
bit 4 Unimplemented: Read as ‘0’
bit 3-0 HLVDL<3:0>: High/Low-Voltage Detection Limit bits
1111 = External analog input is used (input comes from the HLVDIN pin)
1110 = Trip Point 1(1)
1101 = Trip Point 2(1)
1100 = Trip Point 3(1)
.
.
.
0000 = Trip Point 15(1)
Note 1: For the actual trip point, see Section 29.0 “Electrical Characteristics”.
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22.0 12-BIT A/D CONVERTER WITH
THRESHOLD DETECT
The PIC24F 12-bit A/D Converter has the following key
features:
• Successive Approximation Register (SAR)
Conversion
• Conversion Speeds of up to 100 ksps
• Up to 32 Analog Input Channels (Internal and
External)
• Multiple Internal Reference Input Channels
• External Voltage Reference Input Pins
• Unipolar Differential Sample-and-Hold (S/H)
Amplifier
• Automated Threshold Scan and Compare
Operation to Pre-Evaluate Conversion Results
• Selectable Conversion Trigger Source
• Fixed-Length (one word per channel),
Configurable Conversion Result Buffer
• Four Options for Results Alignment
• Configurable Interrupt Generation
• Operation During CPU Sleep and Idle modes
The 12-bit A/D Converter module is an enhanced
version of the 10-bit module offered in some PIC24
devices. Both modules are Successive Approximation
Register (SAR) converters at their cores, surrounded
by a range of hardware features for flexible
configuration. This version of the module extends
functionality by providing 12-bit resolution, a wider
range of automatic sampling options and tighter
integration with other analog modules, such as the
CTMU and a configurable results buffer. This module
also includes a unique Threshold Detect feature that
allows the module itself to make simple decisions
based on the conversion results.
A simplified block diagram for the module is illustrated
in Figure 22-1.
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the 12-Bit
A/D Converter with Threshold Detect, refer
to the “PIC24F Family Reference Manu al”,
Section 51. “12-Bit A/D Converter with
Threshold Detect” (DS39739).
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DS39995C-page 208 2011-2012 Microchip Technology Inc.
FIGURE 22-1: 12-BIT A/D CONVERTER BLOCK DIAGRAM
Comparator
12-Bit SAR
VREF+
DAC
AN14
AN15
AN8
AN9
AN4
AN5
AN6
AN7
AN0
AN1
AN2
AN3
VREF-
Sample Control
S/H
AVSS
AVDD
ADC1BUF0:
ADC1BUF17
AD1CON1
AD1CON2
AD1CON3
AD1CHS
AD1CHITL
AD1CHITH
Control Logic
Data Formatting
Input MUX Control
Conversion Control
Pin Config. Control
Internal
16
VR+VR-
MUX A
VINH
VINL
VINH
VINH
VINL
VINL
VR+
VR-
VR Select
CTMU
VBG
AD1CSSL
AD1CSSH
AVss
0.785 * VDD
AVDD
0.215 * VDD
AD1CON5
CTMU
VBG
Temp. S e nso r
Data Bus
MUX B
Conversion Logic
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To perform an A/D conversion:
1. Configure the A/D module:
a) Configure the port pins as analog inputs
and/or select band gap reference inputs
(ANS<12:10>, ANS<5:0>).
b) Select voltage reference source to match
the expected range on the analog inputs
(AD1CON2<15:13>).
c) Select the analog conversion clock to
match the desired data rate with the
processor clock (AD1CON3<7:0>).
d) Select the appropriate sample/conver-
sion sequence (AD1CON1<7:4> and
AD1CON3<12:8>).
e) Select how conversion results are
presented in the buffer (AD1CON1<9:8>).
f) Select the interrupt rate (AD1CON2<6:2>).
g) Turn on the A/D module (AD1CON1<15>).
2. Configure the A/D interrupt (if required):
a) Clear the AD1IF bit.
b) Select the A/D interrupt priority.
To perform an A/D sample and conversion using
Threshold Detect scanning:
1. Configure the A/D module:
a) Configure the port pins as analog inputs
(ANS<12:10>, ANS<5,0>).
b) Select the voltage reference source to
match the expected range on the analog
inputs (AD1CON2<15:13>).
c) Select the analog conversion clock to
match the desired data rate with the
processor clock (AD1CON3<7:0>).
d) Select the appropriate sample/conversion
sequence (AD1CON1<7:4>, AD1CON3<12:8>).
e) Select how the conversion results are
presented in the buffer (AD1CON1<9:8>).
f) Select the interrupt rate (AD1CON2<6:2>).
2. Configure the threshold compare channels:
a) Enable auto-scan – ASEN bit (AD1CON5<15>).
b) Select the Compare mode “Greater Than,
Less Than or Windowed” – CMx bits
(AD1CON5<1:0>).
c) Select the threshold compare channels to
be scanned (ADCSSH, ADCSSL).
d) If the CTMU is required as a current
source for a threshold compare channel,
enable the corresponding CTMU channel
(ADCCTMUENH, ADCCTMUENL).
e) Write the threshold values into the
corresponding ADC1BUFn registers.
f) Turn on the A/D module (AD1CON1<15>).
3. Configure the A/D interrupt (OPTIONAL):
a) Clear the AD1IF bit.
b) Select the A/D interrupt priority.
Note: If performing an A/D sample and
conversion using Threshold Detect in
Sleep Mode, the RC A/D clock source
must be selected before entering into
Sleep mode.
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22.1 A/D Control Registers
The 12-bit A/D Converter module uses up to
43 registers for its operation. All registers are mapped
in the data memory space.
22.1.1 CONTROL REGISTERS
Depending on the specific device, the module has up to
eleven control and status registers:
• AD1CON1: A/D Control Register 1
• AD1CON2: A/D Control Register 2
• AD1CON3: A/D Control Register 3
• AD1CON5: A/D Control Register 5
• AD1CHS: A/D Sample Select Register
• AD1CHITH and AD1CHITL: A/D Scan Compare
Hit Registers
• AD1CSSL and AD1CSSH: A/D Input Scan Select
Registers
• AD1CTMENH and AD1CTMENL: CTMU Enable
Registers
The AD1CON1, AD1CON2 and AD1CON3 registers
(Register 22-1, Register 22-2 and Register 22-3)
control the overall operation of the A/D module. This
includes enabling the module, configuring the
conversion clock and voltage reference sources,
selecting the sampling and conversion triggers, and
manually controlling the sample/convert sequences.
The AD1CON5 register (Register 22-4) specifically
controls features of the Threshold Detect operation,
including its function in power-saving modes.
The AD1CHS register (Register 22-5) selects the input
channels to be connected to the S/H amplifier. It also
allows the choice of input multiplexers and the
selection of a reference source for differential
sampling.
The AD1CHITH and AD1CHITL registers
(Register 22-6 and Register 22-7) are semaphore
registers used with Threshold Detect operations. The
status of individual bits, or bit pairs in some cases,
indicate if a match condition has occurred. AD1CHITL
is always implemented, whereas AD1CHITH may not
be implemented in devices with 16 or fewer channels.
The AD1CSSH/L registers (Register 22-8 and
Register 22-9) select the channels to be included for
sequential scanning.
The AD1CTMENH/L registers (Register 22-10 and
Register 22-11) select the channel(s) to be used by the
CTMU during conversions. Selecting a particular
channel allows the A/D Converter to control the CTMU
(particularly, its current source) and read its data
through that channel. AD1CTMENL is always
implemented, whereas AD1CTMENH may not be
implemented in devices with 16 or fewer channels.
22.1.2 A/D RESULT BUFFERS
The module incorporates a multi-word, dual port RAM,
called ADC1BUF. The buffer is composed of at least
the same number of word locations as there are
external analog channels for a particular device, with a
maximum number of 32. The number of buffer
addresses is always even. Each of the locations is
mapped into the data memory space and is separately
addressable. The buffer locations are referred to as
ADC1BUF0 through ADC1BUFn (up to 31).
The A/D result buffers are both readable and writable.
When the module is active (AD1CON<15> = 1), the
buffers are read-only, and store the results of A/D
conversions. When the module is inactive
(AD1CON<15> = 0), the buffers are both readable and
writable. In this state, writing to a buffer location
programs a conversion threshold for Threshold Detect
operations.
Buffer contents are not cleared when the module is
deactivated with the ADON bit (AD1CON1<15>).
Conversion results and any programmed threshold
values are maintained when ADON is set or cleared.
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REGISTER 22-1: AD1CON1: A/D CONTROL REGISTER 1
R/W-0 U-0 R/W-0 U-0 U-0 R/W-0 R/W-0 R/W-0
ADON —ADSIDL——MODE12FORM1FORM0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 HSC R/C-0 HSC
SSRC3 SSRC2 SSRC1 SSRC0 — ASAM SAMP DONE
bit 7 bit 0
Legend: C = Clearable bit U = Unimplemented bit, read as ‘0’
R = Readable bit W = Writable bit HSC = Hardware Settable/Clearable bit
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ADON: A/D Operating Mode bit
1 = A/D Converter module is operating
0 = A/D Converter is off
bit 14 Unimplemented: Read as ‘0’
bit 13 ADSIDL: Stop in Idle Mode bit
1 = Discontinues module operation when device enters Idle mode
0 = Continues module operation in Idle mode
bit 12-11 Unimplemented: Read as ‘0’
bit 10 MODE12: 12-Bit Operation Mode bit
1 = 12-bit A/D operation
0 = 10-bit A/D operation
bit 9-8 FORM<1:0>: Data Output Format bits (see the following formats)
11 = Fractional result, signed, left-justified
10 = Absolute fractional result, unsigned, left-justified
01 = Decimal result, signed, right-justified
00 = Absolute decimal result, unsigned, right-justified
bit 7-4 SSRC<3:0>: Sample Clock Source Select bits
1111 = Not available; do not use
1000 = Not available; do not use
0111 = Internal counter ends sampling and starts conversion (auto-convert)
0110 = Not available; do not use
0101 = Timer1 event ends sampling and starts conversion
0100 = CTMU event ends sampling and starts conversion
0011 = Timer5 event ends sampling and starts conversion
0010 = Timer3 event ends sampling and starts conversion
0001 = INT0 event ends sampling and starts conversion
0000 = Clearing the SAMP bit in software ends sampling and begins conversion
bit 3 Unimplemented: Read as ‘0’
bit 2 ASAM: A/D Sample Auto-Start bit
1 = Sampling begins immediately after the last conversion; SAMP bit is auto-set
0 = Sampling begins when the SAMP bit is manually set
bit 1 SAMP: A/D Sample Enable bit
1 = A/D Sample-and-Hold amplifiers are sampling
0 = A/D Sample-and-Hold amplifiers are holding
bit 0 DONE: A/D Conversion Status bit
1 = A/D conversion cycle has completed
0 = A/D conversion cycle has not started or is in progress
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REGISTER 22-2: AD1CON2: A/D CONTROL REGISTER 2
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0
PVCFG1 PVCFG0 NVCFG0 OFFCAL BUFREGEN CSCNA — —
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
BUFS(1)SMPI4 SMPI3 SMPI2 SMPI1 SMPI0 BUFM(1)ALTS
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-14 PVCFG<1:0>: Converter Positive Voltage Reference Configuration bits
11 = 4 * Internal VBG(2)
10 = 2 * Internal VBG(3)
01 =External VREF+
00 =AV
DD
bit 13 NVCFG0: Converter Negative Voltage Reference Configuration bits
1 =External V
REF-
0 =AV
SS
bit 12 OFFCAL: Offset Calibration Mode Select bit
1 = Inverting and non-inverting inputs of channel Sample-and-Hold are connected to AVSS
0 = Inverting and non-inverting inputs of channel Sample-and-Hold are connected to normal inputs
bit 11 BUFREGEN: A/D Buffer Register Enable bit
1 = Conversion result is loaded into a buffer location determined by the converted channel
0 = A/D result buffer is treated as a FIFO
bit 10 CSCNA: Scan Input Selections for CH0+ S/H Input for MUX A Setting bit
1 =Scans inputs
0 = Does not scan inputs
bit 9-8 Unimplemented: Read as ‘0’
bit 7 BUFS: Buffer Fill Status bit(1)
1 = A/D is filling the upper half of the buffer; user should access data in the lower half
0 = A/D is filling the lower half of the buffer; user should access data in the upper half
bit 6-2 SMPI<4:0>: Interrupt Sample Rate Select bits
11111 = Interrupts at the completion of the conversion for each 32nd sample
11110 = Interrupts at the completion of the conversion for each 31st sample
00001 = Interrupts at the completion of the conversion for every other sample
00000 = Interrupts at the completion of the conversion for each sample
bit 1 BUFM: Buffer Fill Mode Select bit(1)
1 = Starts filling the buffer at address, AD1BUF0 on the first interrupt, and AD1BUF(n/2) on the next
interrupt (Split Buffer mode)
0 = Starts filling the buffer at address, ADCBUF0, and each sequential address on successive
interrupts (FIFO mode)
Note 1: This is only applicable when the buffer is used in FIFO mode (BUFREGEN = 0). In addition, BUFS is only
used when BUFM = 1.
2: The voltage reference setting will not be within the specification with VDD below 4.5V.
3: The voltage reference setting will not be within the specification with VDD below 2.3V.
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bit 0 ALTS: Alternate Input Sample Mode Select bit
1 = Uses channel input selects for SAMPLE A on the first sample and SAMPLE B on the next sample
0 = Always uses channel input selects for SAMPLE A
REGISTER 22-2: AD1CON2: A/D CONTROL REGISTER 2 (CONTINUED)
Note 1: This is only applicable when the buffer is used in FIFO mode (BUFREGEN = 0). In addition, BUFS is only
used when BUFM = 1.
2: The voltage reference setting will not be within the specification with VDD below 4.5V.
3: The voltage reference setting will not be within the specification with VDD below 2.3V.
REGISTER 22-3: AD1CON3: A/D CONTROL REGISTER 3
R/W-0 R-0 r-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADRC EXTSAM r SAMC4 SAMC3 SAMC2 SAMC1 SAMC0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADCS7 ADCS6 ADCS5 ADCS4 ADCS3 ADCS2 ADCS1 ADCS0
bit 7 bit 0
Legend: r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ADRC: A/D Conversion Clock Source bit
1 = RC clock
0 = Clock is derived from the system clock
bit 14 EXTSAM: Extended Sampling Time bit
1 = A/D is still sampling after SAMP = 0
0 = A/D is finished sampling
bit 13 Reserved: Maintain as ‘0’
bit 12-8 SAMC<4:0>: Auto-Sample Time Select bits
11111 = 31 T
AD
00001 =1 TAD
00000 =0 TAD
bit 7-0 ADCS<7:0>: A/D Conversion Clock Select bits
11111111-01000000 = Reserved
00111111 = 64·T
CY =TAD
00000001 = 2·TCY =TAD
00000000 = TCY =TAD
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REGISTER 22-4: AD1CON5: A/D CONTROL REGISTER 5
R/W-0 R/W-0 R/W-0 R/W-0 r-0 U-0 R/W-0 R/W-0
ASEN(1)LPEN CTMREQ BGREQ r— ASINT1 ASINT0
bit 15 bit 8
U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
———— WM1 WM0 CM1 CM0
bit 7 bit 0
Legend: r = Reserved bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 ASEN: Auto-Scan Enable bit(1)
1 = Auto-scan is enabled
0 = Auto-scan is disabled
bit 14 LPEN: Low-Power Enable bit
1 = Returns to Low-Power mode after scan
0 = Remains in Full-Power mode after scan
bit 13 CTMREQ: CTMU Request bit
1 = CTMU is enabled when the A/D is enabled and active
0 = CTMU is not enabled by the A/D
bit 12 BGREQ: Band Gap Request bit
1 = Band gap is enabled when the A/D is enabled and active
0 = Band gap is not enabled by the A/D
bit 11 Reserved: Maintain as ‘0’
bit 10 Unimplemented: Read as ‘0’
bit 9-8 ASINT<1:0>: Auto-Scan (Threshold Detect) Interrupt Mode bits
11 = Interrupt after a Threshold Detect sequence completed and a valid compare has occurred
10 = Interrupt after a valid compare has occurred
01 = Interrupt after a Threshold Detect sequence completed
00 = No interrupt
bit 7-4 Unimplemented: Read as ‘0’
bit 3-2 WM<1:0>: Write Mode bits
11 = Reserved
10 = Auto-compare only (conversion results are not saved, but interrupts are generated when a valid
match, as defined by the CMx and ASINTx bits, occurs)
01 = Convert and save (conversion results are saved to locations as determined by the register bits
when a match, as defined by the CMx bits, occurs)
00 = Legacy operation (conversion data is saved to a location determined by the buffer register bits)
bit 1-0 CM<1:0>: Compare Mode bits
11
= Outside Window mode (valid match occurs if the conversion result is outside of the window defined
by the corresponding buffer pair)
10
= Inside Window mode (valid match occurs if the conversion result is inside the window defined by the
corresponding buffer pair)
01
= Greater Than mode (valid match occurs if the result is greater than the value in the corresponding
buffer register)
00
= Less Than mode (valid match occurs if the result is less than the value in the corresponding buffer
register)
Note 1: When using Auto-Scan with Threshold Detect (ASEN = 1), do not configure the Sample Clock Source to
Auto-Convert mode (SSRC = 7). Any other available SSRC selection is valid. To use auto-convert as the
Sample Clock Source (SSRC = 7), make sure ASEN is cleared.
2011-2012 Microchip Technology Inc. DS39995C-page 215
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REGISTER 22-5: AD1CHS: A/D SAMPLE SELECT REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CH0NB2 CH0NB1 CH0NB0 CH0SB4 CH0SB3 CH0SB2 CH0SB1 CH0SB0
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CH0NA2 CH0NA1 CH0NA0 CH0SA4 CH0SA3 CH0SA2 CH0SA1 CH0SA0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-13 CH0NB<2:0>: Sample B Channel 0 Negative Input Select bits
111 = AN6(1)
110 = AN5(2)
101 = AN4
100 = AN3
011 = AN2
010 = AN1
001 = AN0
000 = AVSS
bit 12-8 CH0SB<4:0>: S/H Amplifier Positive Input Select for MUX B Multiplexer Setting bits
11111 = Unimplemented, do not use
11101 = AVDD(3)
11101 = AVSS(3)
11100 = Upper guardband rail (0.785 * VDD)
11011 = Lower guardband rail (0.215 * VDD)
11010 = Internal Band Gap Reference (VBG)(3)
11001-10010 = Unimplemented, do not use
10001 = No channels are connected, all inputs are floating (used for CTMU)
10000 = No channels are connected, all inputs are floating (used for CTMU temperature sensor input)
01111 = AN15
01110 = AN14
01101 = AN13
01100 = AN12
01011 = AN11
01010 = AN10
01001 = AN9
01000 = AN8(1)
00111 = AN7(1)
00110 = AN6(1)
00101 = AN5(2)
00100 = AN4
00011 = AN3
00010 = AN2
00001 = AN1
00000 = AN0
bit 7-5 CH0NA<2:0>: Sample A Channel 0 Negative Input Select bits
The same definitions as for CHONB<2:0>.
bit 4-0 CH0SA<4:0>: Sample A Channel 0 Positive Input Select bits
The same definitions as for CHONA<4:0>.
Note 1: This is implemented on 44-pin devices only.
2: This is implemented on 28-pin and 44-pin devices only.
3: The band gap value used for this input is 2x or 4x the internal VBG, which is selected when PVCFG<1:0> = 1x.
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REGISTER 22-6: AD1CHITH: A/D SCAN COMPARE HIT REGISTER (HIGH WORD)(1)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — CHH17 CHH16
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-2 Unimplemented: Read as ‘0’.
bit 1-0 CHH<17:16>: A/D Compare Hit bits
If CM<1:0> = 11:
1 = A/D Result Buffer x has been written with data or a match has occurred
0 = A/D Result Buffer x has not been written with data
For all other values of CM<1:0>:
1 = A match has occurred on A/D Result Channel x
0 = No match has occurred on A/D Result Channel x
Note 1: Unimplemented channels are read as ‘0’.
REGISTER 22-7: AD1CHITL: A/D SCAN COMPARE HIT REGISTER (LOW WORD)(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CHH15 CHH14 CHH13 CHH12 CHH11 CHH10 CHH9 CHH8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CHH7 CHH6 CHH5 CHH4 CHH3 CHH2 CHH1 CHH0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-0 CHH<15:0>: A/D Compare Hit bits
If CM<1:0> = 11:
1 = A/D Result Buffer x has been written with data or a match has occurred
0 = A/D Result Buffer x has not been written with data
For all other values of CM<1:0>:
1 = A match has occurred on A/D Result Channel n
0 = No match has occurred on A/D Result Channel n
Note 1: Unimplemented channels are read as ‘0’.
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REGISTER 22-8: AD1CSSH: A/D INPUT SCAN SELECT REGISTER (HIGH WORD)(1)
U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0
— CSS30 CSS29 CSS28 CSS27 CSS26 — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — CSS17 CSS16
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 Unimplemented: Read as ‘0’
bit 14-10 CSS<30:26>: A/D Input Scan Selection bits
1 = Includes corresponding channel for input scan
0 = Skips channel for input scan
bit 9-2 Unimplemented: Read as ‘0’
bit 1-0 CSS<17:16>: A/D Input Scan Selection bits
1 = Includes corresponding channel for input scan
0 = Skips channel for input scan
Note 1: Unimplemented channels are read as ‘0’. Do not select unimplemented channels for sampling as
indeterminate results may be produced.
REGISTER 22-9: AD1CSSL: A/D INPUT SCAN SELECT REGISTER (LOW WORD)(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CSS15 CSS14 CSS13 CSS12 CSS11 CSS10 CSS9 CSS8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CSS7 CSS6 CSS5 CSS4 CSS3 CSS2 CSS1 CSS0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-0 CSS<15:0>: A/D Input Scan Selection bits
1 = Includes corresponding ANx input for scan
0 = Skips channel for input scan
Note 1: Unimplemented channels are read as ‘0’. Do not select unimplemented channels for sampling as
indeterminate results may be produced.
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REGISTER 22-10: AD1CTMENH: CTMU ENABLE REGISTER (HIGH WORD)(1)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — CTMEN17 CTMEN16
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-2 Unimplemented: Read as ‘0’.
bit 1-0 CTMEN<17:16>: CTMU Enabled During Conversion bits
1 = CTMU is enabled and connected to the selected channel during conversion
0 = CTMU is not connected to this channel
Note 1: Unimplemented channels are read as ‘0’.
REGISTER 22-11: AD1CTMENL: CTMU ENABLE REGISTER (LOW WORD)(1)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CTMEN15 CTMEN14 CTMEN13 CTMEN12 CTMUEN11 CTMEN10 CTMEN9 CTMEN8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CTMEN7 CTMEN6 CTMEN5 CTMEN4 CTMEN3 CTMEN2 CTMEN1 CTMEN0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-0 CTMEN<15:0>: CTMU Enabled During Conversion bits
1 = CTMU is enabled and connected to the selected channel during conversion
0 = CTMU is not connected to this channel
Note 1: Unimplemented channels are read as ‘0’.
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22.2 A/D Sampling Requirements
The analog input model of the 12-bit A/D Converter is
shown in Figure 22-2. The total sampling time for the
A/D is a function of the holding capacitor charge time.
For the A/D Converter to meet its specified accuracy,
the charge holding capacitor (CHOLD) must be allowed
to fully charge to the voltage level on the analog input
pin. The source impedance (RS), the interconnect
impedance (RIC) and the internal sampling switch
(RSS) impedance combine to directly affect the time
required to charge CHOLD. The combined impedance of
the analog sources must, therefore, be small enough to
fully charge the holding capacitor within the chosen
sample time. To minimize the effects of pin leakage
currents on the accuracy of the A/D Converter, the
maximum recommended source impedance, RS, is
2.5 k. After the analog input channel is selected
(changed), this sampling function must be completed
prior to starting the conversion. The internal holding
capacitor will be in a discharged state prior to each
sample operation.
At least 1 TAD time period should be allowed between
conversions for the sample time. For more details, see
Section 29.0 “Electrical Characteristics”.
EQUA TION 22-1: A/D CONVERSION CLOCK
PERIOD
FIGURE 22-2: 12-BIT A/D CONVERTER ANALOG INPUT MODEL
TAD TCY ADCS 1+
ADCS TAD
TCY
----------1–
=
=
Note: Based on T
CY = 2/FOSC; Doze mode
and PLL are disabled.
CPIN
Rs ANx
ILEAKAGE
RIC 250Sampling
Switch
RSS
CHOLD
VSS
= 32 pF
500 nA
Legend: CPIN
VT
ILEAKAGE
RIC
RSS
CHOLD
= Input Capacitance
= Threshold Voltage
= Leakage Current at the Pin Due to
= Interconnect Resistance
= Sampling Switch Resistance
= Sample-and-Hold Capacitance (from DAC)
Various Junctions
Note: The CPIN value depends on the device package and is not tested. The effect of CPIN is negligible if Rs 5 k.
RSS 3 k
VA
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22.3 Transfer Function
The transfer functions of the A/D Converter in 12-bit
resolution are shown in Figure 22-3. The difference of
the input voltages, (VINH – VINL), is compared to the
reference, ((VR+) – (VR-)).
• The first code transition occurs when the input
voltage is ((VR+) – (VR-))/4096 or 1.0 LSb.
•The 0000 0000 0001 code is centered at
VR- + (1.5 * ((VR+) – (VR-))/4096).
•The 0010 0000 0000 code is centered at
VREFL + (2048.5 * ((VR+) – (VR-))/4096).
• An input voltage less than VR- + (((VR-) –
(VR-))/4096) converts as 0000 0000 0000.
• An input voltage greater than (VR-) + (4095 ((VR+) –
(VR-))/4096) converts as 11 11 111 1 111 1.
FIGURE 22-3: 12-BIT A/D TRANSFER FUNCTION
0010 0000 0001 (2049)
0010 0000 0010 (2050)
0010 0000 0011 (2051)
0001 1111 1101 (2045)
0001 1111 1110 (2046)
0001 1111 1111 (2047)
1111 1111 1110 (4094)
1111 1111 1111 (4095)
0000 0000 0000 (0)
0000 0000 0001 (1)
Output Code
0010 0000 0000 (2048)
(VINH – VINL)
VR-
VR+ – VR-
4096
2048 * (VR+ – VR-)
4096
VR+
VR- +
VR-+
4095 * (VR+ – VR-)
4096
VR- +
0
(Binary (Decimal))
Voltage Level
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22.4 Buffer Data Formats
The A/D conversions are fully differential 12-bit values
when MODE12 = 1 (AD1CON1<10>) and 10-bit values
when MODE12 = 0. When absolute fractional or abso-
lute integer formats are used, the results are 12 or
10 bits wide, respectively. When signed decimal format-
ting is used, the conversion also includes a sign bit,
making 12-bit conversions 13 bits wide, and 10-bit
conversions 11 bits wide. The signed decimal format
yields 12-bit and 10-bit values, respectively. The sign bit
(bit 12 or bit 10) is sign-extended to fill the buffer. The
FORM<1:0> bits (AD1CON1<9:8>) select the format.
Figure 22-4 and Figure 22-5 show the data output
formats that can be selected. Table 22-1
through Table 22-4 show the numerical equivalents for
the various conversion result codes.
FIGURE 22-4: A/D OUTPUT DATA FORMATS (12-BIT)
TABLE 22-1: NUMERICAL EQUIVALENTS OF VARIOUS RESULT CODES:
12-BIT INTEGER FORMATS
RAM Contents: d11 d10 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00
Read to Bus:
Integer 0000d11 d10 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00
Signed Integer s0 s0 s0 s0 d11 d10 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00
Fractional (1.15) d11 d10 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00 0000
Signed Fractional (1.15) s0 d11 d10 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00 000
VIN/VREF 12-Bit Differential
Output Code
(13-bit result)
16-Bit Integer Format/
Equiv a le nt Decimal Value 16-Bit Signed Integer Format/
Equivalent Decimal Value
+4095/4096 0 1111 1111 1111 0000 1111 1111 1111 +4095 0000 1111 1111 1111 +4095
+4094/4096 0 1111 1111 1110 0000 1111 1111 1110 +4094 0000 1111 1111 1110 +4094
+1/4096 0 1000 0000 0001 0000 0000 0000 0001 +1 0000 0000 0000 0001 +1
0/4096 0 0000 0000 0000 0000 0000 0000 0000 00000 0000 0000 0000 0
-1/4096 1 0111 1111 1111 0000 0000 0000 0000 01111 1111 1111 1111 -1
-4095/4096 1 0000 0000 0001 0000 0000 0000 0000 01111 0000 0000 0001 -4095
-4096/4096 1 0000 0000 0000 0000 0000 0000 0000 01111 0000 0000 0000 -4096
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TABLE 22-2: NUMERICAL EQUIVALENTS OF VARIOUS RESULT CODES:
12-BIT FRACTIONAL FORMATS
FIGURE 22-5: A/D OUTPUT DATA FORMATS (10-BIT)
TABLE 22-3: NUMERICAL EQUIVALENTS OF VARIOUS RESULT CODES:
10-BIT INTEGER FORMATS
VIN/VREF 12-Bit
Output Code 16-Bit Fractional Format/
Equivalent Decimal Value 16-Bit Signed Fractional Format/
Equivalent Decimal Value
+4095/4096 0 1111 1111 1111 1111 1111 1111 0000 0.999 0111 1111 1111 1000 0.999
+4094/4096 0 1111 1111 1110 1111 1111 1110 0000 0.998 0111 1111 1110 1000 0.998
+1/4096 0 0000 0000 0001 0000 0000 0001 0000 0.001 0000 0000 0000 1000 0.001
0/4096 0 0000 0000 0000 0000 0000 0000 0000 0.000 0000 0000 0000 0000 0.000
-1/4096 1 0111 1111 1111 0000 0000 0000 0000 0.000 1111 1111 1111 1000 -0.001
-4095/4096 1 0000 0000 0001 0000 0000 0000 0000 0.000 1000 0000 0000 1000 -0.999
-4096/4096 1 0000 0000 0000 0000 0000 0000 0000 0.000 1000 0000 0000 0000 -1.000
RAM Contents: d09 d08 d07 d06 d05 d04 d03 d02 d01 d00
Read to Bus:
Integer 000000d09 d08 d07 d06 d05 d04 d03 d02 d01 d00
Signed Integer s0 s0 s0 s0 s0 s0 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00
Fractional (1.15) d09 d08 d07 d06 d05 d04 d03 d02 d01 d00 000000
Signed Fractional (1.15) s0 d09 d08 d07 d06 d05 d04 d03 d02 d01 d00 00000
VIN/VREF 10-Bit Differential
Output Code
(11-bit result)
16-Bit Integer Format/
Equivalent Decimal Value 16-Bit Signed Integer Format/
Equivalent Decimal Value
+1023/1024 011 1111 1111 0000 0011 1111 1111 1023 0000 0001 1111 1111 1023
+1022/1024 011 1111 1110 0000 0011 1111 1110 1022 0000 0001 1111 1110 1022
+1/1024 000 0000 0001 0000 0000 0000 0001 10000 0000 0000 0001 1
0/1024 000 0000 0000 0000 0000 0000 0000 00000 0000 0000 0000 0
-1/1024 101 1111 1111 0000 0000 0000 0000 01111 1111 1111 1111 -1
-1023/1024 100 0000 0001 0000 0000 0000 0000 01111 1110 0000 0001 -1023
-1024/1024 100 0000 0000 0000 0000 0000 0000 01111 1110 0000 0000 -1024
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TABLE 22-4: NUMERICAL EQUIVALENTS OF VARIOUS RESULT CODES:
10-BIT FRACTIONAL FORMATS
VIN/VREF 10- Bit Differential
Output Code
(11-bit result)
16-Bit Fractional Format/
Equivalent Decimal Value 16-Bit Signed Fractional Format/
Equivalent Decimal Value
+1023/1024 011 1111 1111 1111 1111 1100 0000 0.999 0111 1111 1110 0000 0.999
+1022/1024 011 1111 1110 1111 1111 1000 0000 0.998 0111 1111 1000 0000 0.998
+1/1024 000 0000 0001 0000 0000 0100 0000 0.001 0000 0000 0010 0000 0.001
0/1024 000 0000 0000 0000 0000 0000 0000 0.000 0000 0000 0000 0000 0.000
-1/1024 101 1111 1111 0000 0000 0000 0000 0.000 1111 1111 1110 0000 -0.001
-1023/1024 100 0000 0001 0000 0000 0000 0000 0.000 1000 0000 0010 0000 -0.999
-1024/1024 100 0000 0000 0000 0000 0000 0000 0.000 1000 0000 0000 0000 -1.000
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NOTES:
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23.0 COMPARATOR MODULE
The comparator module provides three dual input
comparators. The inputs to the comparator can be
configured to use any one of four external analog
inputs, as well as a voltage reference input from either
the internal band gap reference, divided by 2 (VBG/2),
or the comparator voltage reference generator.
The comparator outputs may be directly connected to
the CxOUT pins. When the respective COE equals ‘1’,
the I/O pad logic makes the unsynchronized output of
the comparator available on the pin.
A simplified block diagram of the module is shown in
Figure 23-1. Diagrams of the possible individual
comparator configurations are shown in Figure 23-2.
Each comparator has its own control register,
CMxCON (Register 23-1), for enabling and configuring
its operation. The output and event status of all three
comparators is provided in the CMSTAT register
(Register 23-2).
FIGURE 23-1: COMPARATOR MODULE BLOCK DIAGRAM
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on the
Comparator module, refer to the “PIC24F
Family Reference Manual”, Section 46.
“Scalable Comparator Module”
(DS39734).
C1
VIN-
VIN+
CXINB
CXINC
CXINA
CXIND
CVREF
VBG/2
C3
VIN-
VIN+
COE
C1OUT
Pin
CPOL
CEVT
EVPOL<1:0>
COUT
Input
Select
Logic
CCH<1:0>
CREF
COE
C3OUT
Pin
CPOL
CEVT
EVPOL<1:0>
COUT
C2
VIN-
VIN+
COE
C2OUT
Pin
CPOL
CEVT
COUT
Trigger/Interrupt
Logic
Trigger/Interrupt
Logic
EVPOL<1:0>
Trigger/Interrupt
Logic
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FIGURE 23-2: INDIVIDUAL COMPARATOR CONFIGURATIONS
Cx
VIN-
VIN+Off (Read as ‘0’)
Comparator Off
CON = 0, CREF = x, CCH<1:0> = xx
Comparator CxINB > CxINA Compare
CON = 1, CREF = 0, CCH<1:0> = 00
COE
CxOUT
Cx
VIN-
VIN+
COE
CXINB
CXINA
Comparator CxIND > CxINA Compare
CON = 1, CREF = 0, CCH<1:0> = 10
Cx
VIN-
VIN+
COE
CxOUT
CXIND
CXINA
Comparator CxINC > CxINA Compare
CON = 1, CREF = 0, CCH<1:0> = 01
Cx
VIN-
VIN+
COE
CXINC
CXINA
Comparator VBG > CxINA Compare
CON = 1, CREF = 0, CCH<1:0> = 11
Cx
VIN-
VIN+
COE
VBG/2
CXINA
Comparator CxINB > CVREF Compare
CON = 1, CREF = 1, CCH<1:0> = 00
Cx
VIN-
VIN+
COE
CXINB
CVREF
Comparator CxIND > CVREF Compare
CON = 1, CREF = 1, CCH<1:0> = 10
Cx
VIN-
VIN+
COE
CXIND
CVREF
Comparator CxINC > CVREF Compare
CON = 1, CREF = 1, CCH<1:0> = 01
Cx
VIN-
VIN+
COE
CXINC
CVREF
Comparator VBG > CVREF Compare
CON = 1, CREF = 1, CCH<1:0> = 11
Cx
VIN-
VIN+
COE
VBG/2
CVREF
Pin
Pin
CxOUT
Pin
CxOUT
Pin
CxOUT
Pin
CxOUT
Pin
CxOUT
Pin
CxOUT
Pin
CxOUT
Pin
-
-
-
-
--
-
-
-
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REGISTER 23-1: CMxCON: COMPARATOR x CONTROL REGISTERS
R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0 R/W-0 R-0
CON COE CPOL CLPWR —— CEVT COUT
bit 15 bit 8
R/W-0 R/W-0 U-0 R/W-0 U-0 U-0 R/W-0 R/W-0
EVPOL1 EVPOL0 — CREF —— CCH1 CCH0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CON: Comparator Enable bit
1 = Comparator is enabled
0 = Comparator is disabled
bit 14 COE: Comparator Output Enable bit
1 = Comparator output is present on the CxOUT pin
0 = Comparator output is internal only
bit 13 CPOL: Comparator Output Polarity Select bit
1 = Comparator output is inverted
0 = Comparator output is not inverted
bit 12 CLPWR: Comparator Low-Power Mode Select bit
1 = Comparator operates in Low-Power mode
0 = Comparator does not operate in Low-Power mode
bit 11-10 Unimplemented: Read as ‘0’
bit 9 CEVT: Comparator Event bit
1 = Comparator event defined by EVPOL<1:0> has occurred; subsequent triggers and interrupts are
disabled until the bit is cleared
0 = Comparator event has not occurred
bit 8 COUT: Comparator Output bit
When CPOL = 0:
1 =VIN+ > VIN-
0 =V
IN+ < VIN-
When CPOL = 1:
1 =VIN+ < VIN-
0 =V
IN+ > VIN-
bit 7-6 EVPOL<1:0>: Trigger/Event/Interrupt Polarity Select bits
11 = Trigger/event/interrupt is generated on any change of the comparator output (while CEVT = 0)
10 = Trigger/event/interrupt is generated on the transition of the comparator output:
If CPOL = 0 (non-inverted polarity):
High-to-low transition only.
If CPOL = 1 (inverted polarity):
Low-to-high transition only.
01 = Trigger/event/interrupt is generated on the transition of the comparator output
If CPOL = 0 (non-inverted polarity):
Low-to-high transition only.
If CPOL = 1 (inverted polarity):
High-to-low transition only.
00 = Trigger/event/interrupt generation is disabled
bit 5 Unimplemented: Read as ‘0’
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bit 4 CREF: Comparator Reference Select bits (non-inverting input)
1 = Non-inverting input connects to the internal CVREF voltage
0 = Non-inverting input connects to the CxINA pin
bit 3-2 Unimplemented: Read as ‘0’
bit 1-0 CCH<1:0>: Comparator Channel Select bits
11 = Inverting input of the comparator connects to VBG
10 = Inverting input of the comparator connects to the CxIND pin
01 = Inverting input of the comparator connects to the CxINC pin
00 = Inverting input of the comparator connects to the CxINB pin
REGISTER 23-1: CMxCON: COMPARATOR x CONTROL REGISTERS (CONTINUED)
REGISTER 23-2: CMSTAT: COMPARATOR MODULE STATUS REGISTER
R/W-0 U-0 U-0 U-0 U-0 R-0, HSC R-0, HSC R-0, HSC
CMIDL — — — — C3EVT C2EVT C1EVT
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 R-0, HSC R-0, HSC R-0, HSC
— — — — — C3OUT C2OUT C1OUT
bit 7 bit 0
Legend: HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CMIDL: Comparator Stop in Idle Mode bit
1 = Comparator interrupts are disabled in Idle mode; enabled comparators remain operational
0 = Continue operation of all enabled comparators in Idle mode
bit 14-11 Unimplemented: Read as ‘0’
bit 10 C3EVT: Comparator 3 Event Status bit (read-only)
Shows the current event status of Comparator 2 (CM3CON<9>).
bit 9 C2EVT: Comparator 2 Event Status bit (read-only)
Shows the current event status of Comparator 2 (CM2CON<9>).
bit 8 C1EVT: Comparator 1 Event Status bit (read-only)
Shows the current event status of Comparator 1 (CM1CON<9>).
bit 7-3 Unimplemented: Read as ‘0’
bit 2 C3OUT: Comparator 3 Output Status bit (read-only)
Shows the current output of Comparator 3 (CM3CON<8>).
bit 1 C2OUT: Comparator 2 Output Status bit (read-only)
Shows the current output of Comparator 2 (CM2CON<8>).
bit 0 C1OUT: Comparator 1 Output Status bit (read-only)
Shows the current output of Comparator 1 (CM1CON<8>).
2011-2012 Microchip Technology Inc. DS39995C-page 229
PIC24FV32KA304 FAMILY
24.0 COMPARATOR VOLTAGE
REFERENCE 24.1 Configuring the Comparator
Voltage Reference
The comparator voltage reference module is controlled
through the CVRCON register (Register 24-1). The
comparator voltage reference provides a range of
output voltages, with 32 distinct levels.
The comparator voltage reference supply voltage can
come from either VDD and VSS, or the external VREF+
and VREF-. The voltage source is selected by the
CVRSS bit (CVRCON<5>).
The settling time of the comparator voltage reference
must be considered when changing the CVREF output.
FIGURE 24-1: COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on the
Comparator Voltage Reference, refer to
the “PIC24F Family Reference Manual”,
Section 20. “Comparator Module
Voltage Reference Module” (DS39709).
32-to-1 MUX
CVR<3:0>
8R
R
CVREN
CVRSS = 0
AVDD
VREF+CVRSS = 1
8R
CVRSS = 0
VREF-CVRSS = 1
R
R
R
R
R
R
32 Steps
CVREF
AVSS
PIC24FV32KA304 FAMILY
DS39995C-page 230 2011-2012 Microchip Technology Inc.
REGISTER 24-1: CVR C ON: COMPARATOR VO LTAGE REFERENCE CONTROL REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CVREN CVROE CVRSS CVR4 CVR3 CVR2 CVR1 CVR0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-8 Unimplemented: Read as ‘0’
bit 7 CVREN: Comparator Voltage Reference Enable bit
1 =CV
REF circuit is powered on
0 =CV
REF circuit is powered down
bit 6 CVROE: Comparator VREF Output Enable bit
1 =CVREF voltage level is output on the CVREF pin
0 =CV
REF voltage level is disconnected from the CVREF pin
bit 5 CVRSS: Comparator VREF Source Selection bit
1 = Comparator reference source, CVRSRC = VREF+ – VREF-
0 = Comparator reference source, CVRSRC = AVDD – AVSS
bit 4-0 CVR<4:0>: Comparator VREF Value Selection 0 ≤ CVR<4:0> ≤ 31 bits
When CVRSS = 1:
CVREF = (VREF-) + (CVR<4:0>/32) • (VREF+ – VREF-)
When CVRSS = 0:
CVREF = (AVSS) + (CVR<4:0>/32) • (AVDD – AVSS)
2011-2012 Microchip Technology Inc. DS39995C-page 231
PIC24FV32KA304 FAMILY
25.0 CHARGE TIME
MEASUREMENT UNIT (CTMU)
The Charge Time Measurement Unit (CTMU) is a
flexible analog module that provides charge
measurement, accurate differential time measurement
between pulse sources and asynchronous pulse
generation. Its key features include:
• Thirteen external edge input trigger sources
• Polarity control for each edge source
• Control of edge sequence
• Control of response to edge levels or edge
transitions
• Time measurement resolution of one nanosecond
• Accurate current source suitable for capacitive
measurement
Together with other on-chip analog modules, the CTMU
can be used to precisely measure time, measure
capacitance, measure relative changes in capacitance,
or generate output pulses that are independent of the
system clock. The CTMU module is ideal for interfacing
with capacitive-based touch sensors.
The CTMU is controlled through three registers:
CTMUCON1, CTMUCON2 and CTMUICON.
CTMUCON1 enables the module and controls the mode
of operation of the CTMU, as well as controlling edge
sequencing. CTMUCON2 controls edge source selec-
tion and edge source polarity selection. The CTMUICON
register selects the current range of current source and
trims the current.
25.1 Measuring Capacitance
The CTMU module measures capacitance by
generating an output pulse, with a width equal to the
time between edge events, on two separate input
channels. The pulse edge events to both input
channels can be selected from several internal
peripheral modules (OC1, Timer1, any input capture or
comparator module) and up to 13 external pins
(CTED1 through CTED13). This pulse is used with the
module’s precision current source to calculate
capacitance according to the relationship:
EQUATION 25-1:
For capacitance measurements, the A/D Converter
samples an external capacitor (CAPP) on one of its
input channels after the CTMU output’s pulse. A preci-
sion resistor (RPR) provides current source calibration
on a second A/D channel. After the pulse ends, the
converter determines the voltage on the capacitor. The
actual calculation of capacitance is performed in
software by the application.
Figure 25-1 illustrates the external connections used
for capacitance measurements, and how the CTMU
and A/D modules are related in this application. This
example also shows the edge events coming from
Timer1, but other configurations using external edge
sources are possible. A detailed discussion on measur-
ing capacitance and time with the CTMU module is
provided in the “PIC24F Family Re ference Manual”.
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the
Charge Measurement Unit, refer to the
“PIC24F Family Reference Manual”,
Section 53. “Charge T ime Measurem ent
Unit (CTMU) with Threshold Detect”
(DS39743).
IC
dV
dT
-------=
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DS39995C-page 232 2011-2012 Microchip Technology Inc.
FIGURE 25-1: TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR
CAPACITANCE MEASUREMENT
25.2 Measuring Time
Time measurements on the pulse width can be similarly
performed using the A/D module’s internal capacitor
(CAD) and a precision resistor for current calibration.
Figure 25-2 displays the external connections used for
time measurements, and how the CTMU and A/D
modules are related in this application. This example
also shows both edge events coming from the external
CTEDx pins, but other configurations using internal
edge sources are possible.
FIGURE 25-2: TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR TIME
MEASUREMENT
PIC24F Device
A/D Converter
CTMU
ANx
CAPP
Output Pulse
EDG1
EDG2
RPR
ANy
Timer1
Current Source
PIC24F Device
A/D Converter
CTMU
CTEDX
CTEDX
ANx
Output Pulse
EDG1
EDG2
CAD
RPR
Current Source
2011-2012 Microchip Technology Inc. DS39995C-page 233
PIC24FV32KA304 FAMILY
25.3 Pulse Generation and Delay
The CTMU module can also generate an output pulse
with edges that are not synchronous with the device’s
system clock. More specifically, it can generate a pulse
with a programmable delay from an edge event input to
the module.
When the module is configured for pulse generation
delay by setting the TGEN bit (CTMUCON<12>), the
internal current source is connected to the B input of
Comparator 2. A capacitor (CDELAY) is connected to
the Comparator 2 pin, C2INB, and the Comparator
Voltage Reference, CVREF, is connected to C2INA.
CVREF is then configured for a specific trip point. The
module begins to charge CDELAY when an edge event
is detected. While CVREF is greater than the voltage on
CDELAY, CTPLS is high.
When the voltage on CDELAY equals CVREF, CTPLS
goes low. With Comparator 2 configured as the second
edge, this stops the CTMU from charging. In this state
event, the CTMU automatically connects to ground.
The IDISSEN bit doesn't need to be set and cleared
before the next CTPLS cycle.
Figure 25-3 illustrates the external connections for
pulse generation, as well as the relationship of the
different analog modules required. While CTED1 is
shown as the input pulse source, other options are
available. A detailed discussion on pulse generation
with the CTMU module is provided in the “PIC24F
Family Reference Manual”.
FIGURE 25-3: TYPICAL CONNECTIONS AND INTERNAL CONFIGURATION FOR PULSE
DELAY GENERATION
C2
CVREF
CTPLS
PIC24F Device
Current
Comparator
CTMU
CTED1
C2INB
CDELAY
EDG1
-
Q
Q
D
CK
EDG2
Source
R
VDD
EDG1 EDG2
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DS39995C-page 234 2011-2012 Microchip Technology Inc.
REGISTER 25-1: CTMUCON1: CTMU CONTROL REGISTER 1
R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CTMUEN — CTMUSIDL TGEN EDGEN EDGSEQEN IDISSEN CTTRIG
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 CTMUEN: CTMU Enable bit
1 = Module is enabled
0 = Module is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 CTMUSIDL: Stop in Idle Mode bit
1 = Discontinues module operation when device enters Idle mode
0 = Continues module operation in Idle mode
bit 12 TGEN: Time Generation Enable bit
1 = Enables edge delay generation
0 = Disables edge delay generation
bit 11 EDGEN: Edge Enable bit
1 = Edges are not blocked
0 = Edges are blocked
bit 10 EDGSEQEN: Edge Sequence Enable bit
1 = Edge 1 event must occur before Edge 2 event can occur
0 = No edge sequence is needed
bit 9 IDISSEN: Analog Current Source Control bit
1 = Analog current source output is grounded
0 = Analog current source output is not grounded
bit 8 CTTRIG: Trigger Control bit
1 = Trigger output is enabled
0 = Trigger output is disabled
bit 7-0 Unimplemented: Read as ‘0’
2011-2012 Microchip Technology Inc. DS39995C-page 235
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REGISTER 25-2: CTMUCON2: CTMU CONTROL REGISTER 2
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
EDG1EDGE EDG1POL EDG1SEL3 EDG1SEL2 EDG1SEL1 EDG1SEL0 EDG2 EDG1
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0
EDG2EDGE EDG2POL EDG2SEL3 EDG2SEL2 EDG2SEL1 EDG2SEL0 — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 EDG1EDGE: Edge 1 Edge-Sensitive Select bit
1 = Input is edge-sensitive
0 = Input is level-sensitive
bit 14 EDG1POL: Edge 1 Polarity Select bit
1 = Edge 1 is programmed for a positive edge response
0 = Edge 1 is programmed for a negative edge response
bit 13-10 EDG1SEL<3:0>: Edge 1 Source Select bits
1111 = Edge 1 source is Comparator 3 output
1110 = Edge 1 source is Comparator 2 output
1101 = Edge 1 source is Comparator 1 output
1100 = Edge 1 source is IC3
1011 = Edge 1 source is IC2
1010 = Edge 1 source is IC1
1001 = Edge 1 source is CTED8
1000 = Edge 1 source is CTED7
0111 = Edge 1 source is CTED6
0110 = Edge 1 source is CTED5
0101 = Edge 1 source is CTED4
0100 = Edge 1 source is CTED3(2)
0011 = Edge 1 source is CTED1
0010 = Edge 1 source is CTED2
0001 = Edge 1 source is OC1
0000 = Edge 1 source is Timer1
bit 9 EDG2: Edge 2 Status bit
Indicates the status of Edge 2 and can be written to control the current source.
1 = Edge 2 has occurred
0 = Edge 2 has not occurred
bit 8 EDG1: Edge 1 Status bit
Indicates the status of Edge 1 and can be written to control the current source.
1 = Edge 1 has occurred
0 = Edge 1 has not occurred
bit 7 EDG2EDGE: Edge 2 Edge-Sensitive Select bit
1 = Input is edge-sensitive
0 = Input is level-sensitive
Note 1: Edge sources, CTED11 and CTED12, are not available on PIC24FV32KA302 devices.
2: Edge sources, CTED3,CTED11, CTED12 and CTED13, are not available on PIC24FV32KA301 devices.
PIC24FV32KA304 FAMILY
DS39995C-page 236 2011-2012 Microchip Technology Inc.
bit 6 EDG2POL: Edge 2 Polarity Select bit
1 = Edge 2 is programmed for a positive edge
0 = Edge 2 is programmed for a negative edge
bit 5-2 EDG2SEL<3:0>: Edge 2 Source Select bits
1111 = Edge 2 source is Comparator 3 output
1110 = Edge 2 source is Comparator 2 output
1101 = Edge 2 source is Comparator 1 output
1100 = Unimplemented; do not use
1011 = Edge 2 source is IC3
1010 = Edge 2 source is IC2
1001 = Edge 2 source is IC1
1000 = Edge 2 source is CTED13(2)
0111 = Edge 2 source is CTED12(1,2)
0110 = Edge 2 source is CTED11(1,2)
0101 = Edge 2 source is CTED10
0100 = Edge 2 source is CTED9
0011 = Edge 2 source is CTED1
0010 = Edge 2 source is CTED2
0001 = Edge 2 source is OC1
0000 = Edge 2 source is Timer1
bit 1-0 Unimplemented: Read as ‘0’
REGISTER 25-2: CTMUCON2: CTMU CONTROL REGISTER 2 (CONTINUED)
Note 1: Edge sources, CTED11 and CTED12, are not available on PIC24FV32KA302 devices.
2: Edge sources, CTED3,CTED11, CTED12 and CTED13, are not available on PIC24FV32KA301 devices.
2011-2012 Microchip Technology Inc. DS39995C-page 237
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REGISTER 25-3: CTMUICON: CTMU CURRENT CONTROL REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ITRIM5 ITRIM4 ITRIM3 ITRIM2 ITRIM1 ITRIM0 IRNG1 IRNG0
bit 15 bit 8
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15-10 ITRIM<5:0>: Current Source Trim bits
011111 = Maximum positive change from nominal current
011110
.
.
.
000001 = Minimum positive change from nominal current
000000 = Nominal current output specified by IRNG<1:0>
111111 = Minimum negative change from nominal current
.
.
.
100010
100001 = Maximum negative change from nominal current
bit 9-8 IRNG<1:0>: Current Source Range Select bits
11 = 100 x Base Current
10 = 10 × Base Current
01 = Base Current Level (0.55 µA nominal)
00 = 1000 x Base Current
bit 7-0 Unimplemented: Read as ‘0’
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DS39995C-page 238 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 239
PIC24FV32KA304 FAMILY
26.0 SPECIAL FEATURES
PIC24FV32KA304 family devices include several
features intended to maximize application flexibility and
reliability, and minimize cost through elimination of
external components. These are:
• Flexible Configuration
• Watchdog Timer (WDT)
• Code Protection
• In-Circuit Serial Programming™ (ICSP™)
• In-Circuit Emulation
26.1 Configuration Bits
The Configuration bits can be programmed (read as
‘0’), or left unprogrammed (read as ‘1’), to select vari-
ous device configurations. These bits are mapped,
starting at program memory location, F80000h. A
complete list of Configuration register locations is pro-
vided in Table 26-1. A detailed explanation of the
various bit functions is provided in Register 26-1
through Register 26-8.
The address, F80000h, is beyond the user program
memory space. In fact, it belongs to the configuration
memory space (800000h-FFFFFFh), which can only be
accessed using table reads and table writes.
TABLE 26-1: CONFIGURATION REGISTERS
LOCATIONS
REGISTER 26-1: FBS: BOOT SEGMENT CONFIGURATION REGISTER
Note: This data sheet summarizes the features
of this group of PIC24F devices. It is not
intended to be a comprehensive refer-
ence source. For more information on the
Watchdog Timer, High-Level Device Inte-
gration and Programming Diagnostics,
refer to the individual sections of the
“PIC24F Family Reference Manual”
provided below:
•Sect ion 9. “W atchdo g Timer ( WDT)”
(DS39697)
•Section 36. “ Hig h-L ev el In teg ration
with Programmable High/Low-
Voltage Detect (H LVD)” (DS39725)
•Section 33. “ Pr o gram m ing and
Diagnostics” (DS39716) Configuration
Register Address
FBS F80000
FGS F80004
FOSCSEL F80006
FOSC F80008
FWDT F8000A
FPOR F8000C
FICD F8000E
FDS F80010
U-0 U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1
———— BSS2 BSS1 BSS0 BWRP
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-4 Unimplemented: Read as ‘0’
bit 3-1 BSS<2:0>: Boot Segment Program Flash Code Protection bits
111 = No boot program Flash segment
011 = Reserved
110 = Standard security, boot program Flash segment starts at 200h, ends at 000AFEh
010 = High-security boot program Flash segment starts at 200h, ends at 000AFEh
101 = Standard security, boot program Flash segment starts at 200h, ends at 0015FEh(1)
001 = High-security, boot program Flash segment starts at 200h, ends at 0015FEh(1)
100 = Standard security; boot program Flash segment starts at 200h, ends at 002BFEh(1)
000 = High-security; boot program Flash segment starts at 200h, ends at 002BFEh(1)
bit 0 BWRP: Boot Segment Program Flash Write Protection bit
1 = Boot segment may be written
0 = Boot segment is write-protected
Note 1: This selection should not be used in PIC24FV16KA3XX devices.
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DS39995C-page 240 2011-2012 Microchip Technology Inc.
REGISTER 26-2: FGS: GENERAL SEGMENT CONFIGURATION REGISTER
REGISTER 26-3: FOSCSEL: OSCILLATOR SELECTION CONFIGURATION REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 R/C-1 R/C-1
— — — — — — GSS0 GWRP
bit 7 bit 0
Legend:
R = Readable bit C = Clearable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-2 Unimplemented: Read as ‘0’
bit 1 GSS0: General Segment Code Flash Code Protection bit
1 = No protection
0 = Standard security is enabled
bit 0 GWRP: General Segment Code Flash Write Protection bit
1 = General segment may be written
0 = General segment is write-protected
R/P-1 R/P-1 R/P-1 U-0 U-0 R/P-1 R/P-1 R/P-1
IESO LPRCSEL SOSCSRC —— FNOSC2 FNOSC1 FNOSC0
bit 7 bit 0
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 IESO: Internal External Switchover bit
1 = Internal External Switchover mode is enabled (Two-Speed Start-up is enabled)
0 = Internal External Switchover mode is disabled (Two-Speed Start-up is disabled)
bit 6 LPRCSEL: Internal LPRC Oscillator Power Select bit
1 = High-Power/High-Accuracy mode
0 = Low-Power/Low-Accuracy mode
bit 5 SOSCSRC: Secondary Oscillator Clock Source Configuration bit
1 = SOSC analog crystal function is available on the SOSCI/SOSCO pins
0 = SOSC crystal is disabled; digital SCLKI function is selected on the SOSCO pin
bit 4-3 Unimplemented: Read as ‘0’
bit 2-0 FNOSC<2:0>: Oscillator Selection bits
000 = Fast RC Oscillator (FRC)
001 = Fast RC Oscillator with divide-by-N with PLL module (FRCDIV+PLL)
010 = Primary Oscillator (XT, HS, EC)
011 = Primary Oscillator with PLL module (HS+PLL, EC+PLL)
100 = Secondary Oscillator (SOSC)
101 = Low-Power RC Oscillator (LPRC)
110 = 500 kHz Low-Power FRC Oscillator with divide-by-N (LPFRCDIV)
111 = 8 MHz FRC Oscillator with divide-by-N (FRCDIV)
2011-2012 Microchip Technology Inc. DS39995C-page 241
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REGISTER 26-4: FOSC: OSCILLATOR CONFIGURATION REGISTER
R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1
FCKSM1 FCKSM0 SOSCSEL POSCFREQ1 POSCFREQ0 OSCIOFNC POSCMD1 POSCMD0
bit 7 bit 0
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-6 FCKSM<1:0>: Clock Switching and Fail-Safe Clock Monitor Selection Configuration bits
1x = Clock switching is disabled, Fail-Safe Clock Monitor is disabled
01 = Clock switching is enabled, Fail-Safe Clock Monitor is disabled
00 = Clock switching is enabled, Fail-Safe Clock Monitor is enabled
bit 5 SOSCSEL: Secondary Oscillator Power Selection Configuration bit
1 = Secondary oscillator is configured for high-power operation
0 = Secondary oscillator is configured for low-power operation
bit 4-3 POSCFREQ<1:0>: Primary Oscillator Frequency Range Configuration bits
11 = Primary oscillator/external clock input frequency is greater than 8 MHz
10 = Primary oscillator/external clock input frequency is between 100 kHz and 8 MHz
01 = Primary oscillator/external clock input frequency is less than 100 kHz
00 = Reserved; do not use
bit 2 OSCIOFNC: CLKO Enable Configuration bit
1 = CLKO output signal is active on the OSCO pin; primary oscillator must be disabled or configured
for the External Clock mode (EC) for the CLKO to be active (POSCMD<1:0> = 11 or 00)
0 = CLKO output is disabled
bit 1-0 POSCMD<1:0>: Primary Oscillator Configuration bits
11 = Primary Oscillator mode is disabled
10 = HS Oscillator mode is selected
01 = XT Oscillator mode is selected
00 = External Clock mode is selected
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DS39995C-page 242 2011-2012 Microchip Technology Inc.
REGISTER 26-5: FWDT: WATCHDOG TIMER CONFIGURATION REGISTER
R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1
FWDTEN1 WINDIS FWDTEN0 FWPSA WDTPS3 WDTPS2 WDTPS1 WDTPS0
bit 7 bit 0
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7,5 FWDTEN<1:0>: Watchdog Timer Enable bits
11 = WDT is enabled in hardware
10 = WDT is controlled with the SWDTEN bit setting
01 = WDT is enabled only while device is active; WDT is disabled in Sleep; SWDTEN bit is disabled
00 = WDT is disabled in hardware; SWDTEN bit is disabled
bit 6 WINDIS: Windowed Watchdog Timer Disable bit
1 = Standard WDT is selected; windowed WDT is disabled
0 = Windowed WDT is enabled; note that executing a CLRWDT instruction while the WDT is disabled in
hardware and software (FWDTEN<1:0> = 00 and RCON bit, SWDTEN = 0) will not cause a device
Reset
bit 4 FWPSA: WDT Prescaler bit
1 = WDT prescaler ratio of 1:128
0 = WDT prescaler ratio of 1:32
bit 3-0 WDTPS<3:0>: Watchdog Timer Postscale Select bits
1111 = 1:32,768
1110 = 1:16,384
1101 = 1:8,192
1100 = 1:4,096
1011 = 1:2,048
1010 = 1:1,024
1001 = 1:512
1000 = 1:256
0111 = 1:128
0110 = 1:64
0101 = 1:32
0100 = 1:16
0011 = 1:8
0010 = 1:4
0001 = 1:2
0000 = 1:1
2011-2012 Microchip Technology Inc. DS39995C-page 243
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REGISTER 26-6: FPOR: RESET CONFIGURATION REGISTER
R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1
MCLRE(2)BORV1(3)BORV0(3)I2C1SEL(1)PWRTEN LVRCFG(1)BOREN1 BOREN0
bit 7 bit 0
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 MCLRE: MCLR Pin Enable bit(2)
1 = MCLR pin is enabled; RA5 input pin is disabled
0 = RA5 input pin is enabled; MCLR is disabled
bit 6-5 BORV<1:0>: Brown-out Reset Enable bits(3)
11 = Brown-out Reset is set to the lowest voltage
10 = Brown-out Reset
01 = Brown-out Reset set to the highest voltage
00 = Downside protection on POR is enabled – “zero-power” is selected
bit 4 I2C1SEL: Alternate I2C1 Pin Mapping bit(1)
1 = Default location for SCL1/SDA1 pins
0 = Alternate location for SCL1/SDA1 pins
bit 3 PWRTEN: Power-up Timer Enable bit
1 = PWRT is enabled
0 = PWRT is disabled
bit 2 LVRCFG: Low-Voltage Regulator Configuration bit(1)
1 = Low-voltage regulator is not available
0 = Low-voltage regulator is available and controlled by the LVREN bit (RCON<12>) during Sleep
bit 1-0 BOREN<1:0>: Brown-out Reset Enable bits
11 = Brown-out Reset is enabled in hardware; SBOREN bit is disabled
10 = Brown-out Reset is enabled only while device is active and disabled in Sleep; SBOREN bit is disabled
01 = Brown-out Reset is controlled with the SBOREN bit setting
00 = Brown-out Reset is disabled in hardware; SBOREN bit is disabled
Note 1: This setting only applies to the “FV” devices. This bit is reserved and should be maintained as ‘1’ on “F”
devices.
2: The MCLRE fuse can only be changed when using the VPP based ICSP™ mode entry. This prevents a user
from accidentally locking out the device from the low-voltage test entry.
3: Refer to Section 29.0 “Electrical Characteristics” for BOR voltages.
PIC24FV32KA304 FAMILY
DS39995C-page 244 2011-2012 Microchip Technology Inc.
REGISTER 26-7: FICD: IN-CIRCUIT DEBUGGER CONFIGURATION REGISTER
R/P-1 U-0 U-0 U-0 U-0 U-0 R/P-1 R/P-1
DEBUG — — — — — FICD1 FICD0
bit 7 bit 0
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 DEBUG: Background Debugger Enable bit
1 = Background debugger is disabled
0 = Background debugger functions are enabled
bit 6-2 Unimplemented: Read as ‘0’
bit 1-0 FICD<1:0:>: ICD Pin Select bits
11 = PGEC1/PGED1 are used for programming and debugging the device
10 = PGEC2/PGED2 are used for programming and debugging the device
01 = PGEC3/PGED3 are used for programming and debugging the device
00 = Reserved; do not use
2011-2012 Microchip Technology Inc. DS39995C-page 245
PIC24FV32KA304 FAMILY
REGISTER 26-8: FDS: DEEP SLEEP CONFIGURATION REGISTER
R/P-1 R/P-1 U-0 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1
DSWDTEN DSBOREN —DSWDTOSC DSWDTPS3 DSWDTPS2 DSWDTPS1 DSWDTPS0
bit 7 bit 0
Legend:
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 DSWDTEN: Deep Sleep Watchdog Timer Enable bit
1 = DSWDT is enabled
0 = DSWDT is disabled
bit 6 DSBOREN: Deep Sleep/Low-Power BOR Enable bit
(does not affect operation in non Deep Sleep modes)
1 = Deep Sleep BOR is enabled in Deep Sleep
0 = Deep Sleep BOR is disabled in Deep Sleep
bit 5 Unimplemented: Read as ‘0’
bit 4 DSWDTOSC: DSWDT Reference Clock Select bit
1 = DSWDT uses LPRC as the reference clock
0 = DSWDT uses SOSC as the reference clock
bit 3-0 DSWDTPS<3:0>: Deep Sleep Watchdog Timer Postscale Select bits
The DSWDT prescaler is 32; this creates an approximate base time unit of 1 ms.
1111 = 1:2,147,483,648 (25.7 days) nominal
1110 = 1:536,870,912 (6.4 days) nominal
1101 = 1:134,217,728 (38.5 hours) nominal
1100 = 1:33,554,432 (9.6 hours) nominal
1011 = 1:8,388,608 (2.4 hours) nominal
1010 = 1:2,097,152 (36 minutes) nominal
1001 = 1:524,288 (9 minutes) nominal
1000 = 1:131,072 (135 seconds) nominal
0111 = 1:32,768 (34 seconds) nominal
0110 = 1:8,192 (8.5 seconds) nominal
0101 = 1:2,048 (2.1 seconds) nominal
0100 = 1:512 (528 ms) nominal
0011 = 1:128 (132 ms) nominal
0010 = 1:32 (33 ms) nominal
0001 = 1:8 (8.3 ms) nominal
0000 = 1:2 (2.1 ms) nominal
PIC24FV32KA304 FAMILY
DS39995C-page 246 2011-2012 Microchip Technology Inc.
REGISTER 26-9: DEVID: DEVICE ID REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 23 bit 16
RRRRRRRR
FAMID7 FAMID6 FAMID5 FAMID4 FAMID3 FAMID2 FAMID1 FAMID0
bit 15 bit 8
RRRRRRRR
DEV7 DEV6 DEV5 DEV4 DEV3 DEV2 DEV1 DEV0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 23-16 Unimplemented: Read as ‘0’
bit 15-8 FAMID<7:0>: Device Family Identifier bits
01000101 = PIC24FV32KA304 family
bit 7-0 DEV<7:0>: Individual Device Identifier bits
00010111 = PIC24FV32KA304
00000111 = PIC24FV16KA304
00010011 = PIC24FV32KA302
00000011 = PIC24FV16KA302
00011001 = PIC24FV32KA301
00001001 = PIC24FV16KA301
00010110 = PIC24F32KA304
00000110 = PIC24F16KA304
00010010 = PIC24F32KA302
00000010 = PIC24F16KA302
00011000 = PIC24F32KA301
00001000 = PIC24F16KA301
2011-2012 Microchip Technology Inc. DS39995C-page 247
PIC24FV32KA304 FAMILY
REGISTER 26-10: DEVREV: DEVICE REVISION REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 23 bit 16
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 U-0 U-0 R R R R
———— REV3 REV2 REV1 REV0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 23-4 Unimplemented: Read as ‘0’
bit 3-0 REV<3:0>: Minor Revision Identifier bits
PIC24FV32KA304 FAMILY
DS39995C-page 248 2011-2012 Microchip Technology Inc.
26.2 On-Chip Voltage Regulator
All of the PIC24FV32KA304 family devices power their
core digital logic at a nominal 3.0V. This may create an
issue for designs that are required to operate at a
higher typical voltage, as high as 5.0V. To simplify sys-
tem design, all devices in the “FV” family incorporate an
on-chip regulator that allows the device to run its core
logic from VDD.
The regulator is always enabled and provides power to
the core from the other VDD pins. A low-ESR capacitor
(such as ceramic) must be connected to the VCAP pin
(Figure 26-1). This helps to maintain the stability of the
regulator. The recommended value for the filter capac-
itor is provided in Se ction 29.1 “DC Char acterist ics”.
In all of the PIC24FV32KA304 family of devices, the
regulator is disabled.
For the “F” devices, the VDDCORE and VDD pins are
internally tied together to operate at an overall lower
allowable voltage range (1.8V-3.6V). Refer to
Figure 26-1 for possible configurations.
26.2.1 VOLTAGE REGULATOR TRACKING
MODE AND LOW-VOLTAGE
DETECTION
For all PIC24FV32KA304 devices, the on-chip regula-
tor provides a constant voltage of 3.0V nominal to the
digital core logic. The regulator can provide this level
from a VDD of about 3.0V, all the way up to the device’s
VDDMAX. It does not have the capability to boost VDD
levels below 3.0V. In order to prevent “brown out” con-
ditions when the voltage drops too low for the regulator,
the regulator enters Tracking mode. In Tracking mode,
the regulator output follows VDD with a typical voltage
drop of 100 mV.
When the device enters Tracking mode, it is no longer
possible to operate at full speed. To provide information
about when the device enters Tracking mode, the
on-chip regulator includes a simple, High/Low-Voltage
Detect (HLVD) circuit. When VDD drops below full-speed
operating voltage, the circuit sets the High/Low-Voltage
Detect Interrupt Flag, HLVDIF (IFS4<8>). This can be
used to generate an interrupt and put the application into
a low-power operational mode or trigger an orderly
shutdown. High/Low-Voltage Detection is only available
for “FV” parts.
FIGURE 26-1: CONNECTIONS FOR THE
ON-CHIP REGULATOR
26.2.2 ON-CHIP REGULATOR AND POR
For PIC24FV32KA304 devices, it takes approximately
1 s for it to generate output. During this time, desig-
nated as TPM, code execution is disabled. TPM is
applied every time the device resumes operation after
any power-down, including Sleep mode.
26.3 Wat chdog Timer (WDT)
For the PIC24FV32KA304 family of devices, the WDT
is driven by the LPRC oscillator. When the WDT is
enabled, the clock source is also enabled.
The nominal WDT clock source from LPRC is 31 kHz.
This feeds a prescaler that can be configured for either
5-bit (divide-by-32) or 7-bit (divide-by-128) operation.
The prescaler is set by the FWPSA Configuration bit.
With a 31 kHz input, the prescaler yields a nominal
WDT time-out period (TWDT) of 1 ms in 5-bit mode or
4 ms in 7-bit mode.
A variable postscaler divides down the WDT prescaler
output and allows for a wide range of time-out periods.
The postscaler is controlled by the Configuration bits,
WDTPS<3:0> (FWDT<3:0>), which allow the selection
of a total of 16 settings, from 1:1 to 1:32,768. Using the
prescaler and postscaler time-out periods, ranging
from 1 ms to 131 seconds, can be achieved.
VDD
VCAP
VSS
PIC24FV32KA304
CEFC
5.0V
(10 F typ)
Regulator Enabled:(1)
Note 1: These are typical operating voltages. Refer to
Section 29.0 “Electrical Characteristics” for
the full operating ranges of VDD and VDDCORE.
2011-2012 Microchip Technology Inc. DS39995C-page 249
PIC24FV32KA304 FAMILY
The WDT, prescaler and postscaler are reset:
• On any device Reset
• On the completion of a clock switch, whether
invoked by software (i.e., setting the OSWEN bit
after changing the NOSCx bits) or by hardware
(i.e., Fail-Safe Clock Monitor)
• When a PWRSAV instruction is executed
(i.e., Sleep or Idle mode is entered)
• When the device exits Sleep or Idle mode to
resume normal operation
•By a CLRWDT instruction during normal execution
If the WDT is enabled in hardware (FWDTEN<1:0> = 11),
it will continue to run during Sleep or Idle modes. When
the WDT time-out occurs, the device will wake and code
execution will continue from where the PWRSAV
instruction was executed. The corresponding SLEEP or
IDLE bit (RCON<3:2>) will need to be cleared in software
after the device wakes up.
The WDT Flag bit, WDTO (RCON<4>), is not
automatically cleared following a WDT time-out. To
detect subsequent WDT events, the flag must be
cleared in software.
26.3.1 WINDOWED OPERATION
The Watchdog Timer has an optional Fixed Window
mode of operation. In this Windowed mode, CLRWDT
instructions can only reset the WDT during the last 1/4
of the programmed WDT period. A CLRWDT instruction
executed before that window causes a WDT Reset,
similar to a WDT time-out.
Windowed WDT mode is enabled by programming the
Configuration bit, WINDIS (FWDT<6>), to ‘0’.
26.3.2 CONTROL REGISTER
The WDT is enabled or disabled by the FWDTEN<1:0>
Configuration bits. When both the FWDTEN<1:0>
Configuration bits are set, the WDT is always enabled.
The WDT can be optionally controlled in software when
the FWDTEN<1:0> Configuration bits have been pro-
grammed to ‘10’. The WDT is enabled in software by
setting the SWDTEN control bit (RCON<5>). The
SWDTEN control bit is cleared on any device Reset.
The software WDT option allows the user to enable the
WDT for critical code segments, and disable the WDT
during non-critical segments, for maximum power
savings. When the FWTEN<1:0> bits are set to ‘01’,
the WDT is only enabled in Run and Idle modes, and is
disabled in Sleep. Software control of the SWDTEN bit
(RCON<5>) is disabled with this setting.
FIGURE 26-2: WDT BLOCK DIAGRAM
Note: The CLRWDT and PWRSAV instructions
clear the prescaler and postscaler counts
when executed.
LPRC Input WDT Overflow
Wake from Sleep
31 kHz
Prescaler Postscaler
FWPSA
SWDTEN
FWDTEN<1:0>
Reset
All Device Resets
Sleep or Idle Mode
LPRC Control
CLRWDT Instr.
PWRSAV Instr.
(5-Bit/7-Bit) 1:1 to 1:32.768
WDTPS<3:0>
1 ms/4 ms
Exit Sleep or
Idle Mode
WDT
Counter
Transition to
New Clock Source
PIC24FV32KA304 FAMILY
DS39995C-page 250 2011-2012 Microchip Technology Inc.
26.4 Deep Sleep Watchdog Timer
(DSWDT)
In PIC24FV32KA304 family devices, in addition to the
WDT module, a DSWDT module is present which runs
while the device is in Deep Sleep, if enabled. It is driven
by either the SOSC or LPRC oscillator. The clock source
is selected by the Configuration bit, DSWDTOSC
(FDS<4>).
The DSWDT can be configured to generate a time-out,
at 2.1 ms to 25.7 days, by selecting the respective
postscaler. The postscaler can be selected by the
Configuration bits, DSWDTPS<3:0> (FDS<3:0>).
When the DSWDT is enabled, the clock source is also
enabled.
DSWDT is one of the sources that can wake-up the
device from Deep Sleep mode.
26.5 Program Verification and
Code Protection
For all devices in the PIC24FV32KA304 family, code
protection for the boot segment is controlled by the
Configuration bit, BSS0, and the general segment by
the Configuration bit, GSS0. These bits inhibit external
reads and writes to the program memory space This
has no direct effect in normal execution mode.
Write protection is controlled by bit, BWRP, for the boot
segment and bit, GWRP, for the general segment in the
Configuration Word. When these bits are programmed
to ‘0’, internal write and erase operations to program
memory are blocked.
26.6 In-Circuit Serial Programming
PIC24FV32KA304 family microcontrollers can be
serially programmed while in the end application circuit.
This is simply done with two lines for clock (PGECx) and
data (PGEDx), and three other lines for power, ground
and the programming voltage. This allows customers to
manufacture boards with unprogrammed devices and
then program the microcontroller just before shipping the
product. This also allows the most recent firmware or a
custom firmware to be programmed.
26.7 In-Circuit Debugger
When MPLAB® ICD 3, MPLAB REAL ICE™ or PICkit™
3 is selected as a debugger, the in-circuit debugging
functionality is enabled. This function allows simple
debugging functions when used with MPLAB IDE.
Debugging functionality is controlled through the PGECx
and PGEDx pins.
To use the in-circuit debugger function of the device,
the design must implement ICSP connections to
MCLR, VDD, VSS, PGECx, PGEDx and the pin pair. In
addition, when the feature is enabled, some of the
resources are not available for general use. These
resources include the first 80 bytes of data RAM and
two I/O pins.
2011-2012 Microchip Technology Inc. DS39995C-page 251
PIC24FV32KA304 FAMILY
27.0 DEVELOPMENT SUPPORT
The PIC® microcontrollers and dsPIC® digital signal
controllers are supported with a full range of software
and hardware development tools:
• Integrated Development Environment
- MPLAB® IDE Software
• Compilers/Assemblers/Linkers
- MPLAB C Compiler for Various Device
Families
- HI-TECH C® for Various Device Families
- MPASMTM Assembler
-MPLINK
TM Object Linker/
MPLIBTM Object Librarian
- MPLAB Assembler/Linker/Librarian for
Various Device Families
• Simulators
- MPLAB SIM Software Simulator
•Emulators
- MPLAB REAL ICE™ In-Circuit Emulator
• In-Circuit Debuggers
- MPLAB ICD 3
- PICkit™ 3 Debug Express
• Device Programmers
- PICkit™ 2 Programmer
- MPLAB PM3 Device Programmer
• Low-Cost Demonstration/Development Boards,
Evaluation Kits, and Starter Kits
27.1 MPLAB Integrated Development
Environment Software
The MPLAB IDE software brings an ease of software
development previously unseen in the 8/16/32-bit
microcontroller market. The MPLAB IDE is a Windows®
operating system-based application that contains:
• A single graphical interface to all debugging tools
- Simulator
- Programmer (sold separately)
- In-Circuit Emulator (sold separately)
- In-Circuit Debugger (sold separately)
• A full-featured editor with color-coded context
• A multiple project manager
• Customizable data windows with direct edit of
contents
• High-level source code debugging
• Mouse over variable inspection
• Drag and drop variables from source to watch
windows
• Extensive on-line help
• Integration of select third party tools, such as
IAR C Compilers
The MPLAB IDE allows you to:
• Edit your source files (either C or assembly)
• One-touch compile or assemble, and download to
emulator and simulator tools (automatically
updates all project information)
• Debug using:
- Source files (C or assembly)
- Mixed C and assembly
- Machine code
MPLAB IDE supports multiple debugging tools in a
single development paradigm, from the cost-effective
simulators, through low-cost in-circuit debuggers, to
full-featured emulators. This eliminates the learning
curve when upgrading to tools with increased flexibility
and power.
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DS39995C-page 252 2011-2012 Microchip Technology Inc.
27.2 MPLAB C Compilers for Various
Device Families
The MPLAB C Compiler code development systems
are complete ANSI C compilers for Microchip’s PIC18,
PIC24 and PIC32 families of microcontrollers and the
dsPIC30 and dsPIC33 families of digital signal control-
lers. These compilers provide powerful integration
capabilities, superior code optimization and ease of
use.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
27.3 HI-TECH C for Various Device
Families
The HI-TECH C Compiler code development systems
are complete ANSI C compilers for Microchip’s PIC
family of microcontrollers and the dsPIC family of digital
signal controllers. These compilers provide powerful
integration capabilities, omniscient code generation
and ease of use.
For easy source level debugging, the compilers provide
symbol information that is optimized to the MPLAB IDE
debugger.
The compilers include a macro assembler, linker, pre-
processor, and one-step driver, and can run on multiple
platforms.
27.4 MPASM Assembler
The MPASM Assembler is a full-featured, universal
macro assembler for PIC10/12/16/18 MCUs.
The MPASM Assembler generates relocatable object
files for the MPLINK Object Linker, Intel® standard HEX
files, MAP files to detail memory usage and symbol
reference, absolute LST files that contain source lines
and generated machine code and COFF files for
debugging.
The MPASM Assembler features include:
• Integration into MPLAB IDE projects
• User-defined macros to streamline
assembly code
• Conditional assembly for multi-purpose
source files
• Directives that allow complete control over the
assembly process
27.5 MPLINK Object Linker/
MPLIB Object Librarian
The MPLINK Object Linker combines relocatable
objects created by the MPASM Assembler and the
MPLAB C18 C Compiler. It can link relocatable objects
from precompiled libraries, using directives from a
linker script.
The MPLIB Object Librarian manages the creation and
modification of library files of precompiled code. When
a routine from a library is called from a source file, only
the modules that contain that routine will be linked in
with the application. This allows large libraries to be
used efficiently in many different applications.
The object linker/library features include:
• Efficient linking of single libraries instead of many
smaller files
• Enhanced code maintainability by grouping
related modules together
• Flexible creation of libraries with easy module
listing, replacement, deletion and extraction
27.6 MPLAB Assembler, Linker and
Librarian for Various Device
Families
MPLAB Assembler produces relocatable machine
code from symbolic assembly language for PIC24,
PIC32 and dsPIC devices. MPLAB C Compiler uses
the assembler to produce its object file. The assembler
generates relocatable object files that can then be
archived or linked with other relocatable object files and
archives to create an executable file. Notable features
of the assembler include:
• Support for the entire device instruction set
• Support for fixed-point and floating-point data
• Command line interface
• Rich directive set
• Flexible macro language
• MPLAB IDE compatibility
2011-2012 Microchip Technology Inc. DS39995C-page 253
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27.7 MPLAB SIM Software Simulator
The MPLAB SIM Software Simulator allows code
development in a PC-hosted environment by simulat-
ing the PIC MCUs and dsPIC® DSCs on an instruction
level. On any given instruction, the data areas can be
examined or modified and stimuli can be applied from
a comprehensive stimulus controller. Registers can be
logged to files for further run-time analysis. The trace
buffer and logic analyzer display extend the power of
the simulator to record and track program execution,
actions on I/O, most peripherals and internal registers.
The MPLAB SIM Software Simulator fully supports
symbolic debugging using the MPLAB C Compilers,
and the MPASM and MPLAB Assemblers. The soft-
ware simulator offers the flexibility to develop and
debug code outside of the hardware laboratory envi-
ronment, making it an excellent, economical software
development tool.
27.8 MPLAB REAL ICE In-Circuit
Emulator System
MPLAB REAL ICE In-Circuit Emulator System is
Microchip’s next generation high-speed emulator for
Microchip Flash DSC and MCU devices. It debugs and
programs PIC® Flash MCUs and dsPIC® Flash DSCs
with the easy-to-use, powerful graphical user interface of
the MPLAB Integrated Development Environment (IDE),
included with each kit.
The emulator is connected to the design engineer’s PC
using a high-speed USB 2.0 interface and is connected
to the target with either a connector compatible with in-
circuit debugger systems (RJ11) or with the new high-
speed, noise tolerant, Low-Voltage Differential Signal
(LVDS) interconnection (CAT5).
The emulator is field upgradable through future firmware
downloads in MPLAB IDE. In upcoming releases of
MPLAB IDE, new devices will be supported, and new
features will be added. MPLAB REAL ICE offers
significant advantages over competitive emulators
including low-cost, full-speed emulation, run-time
variable watches, trace analysis, complex breakpoints, a
ruggedized probe interface and long (up to three meters)
interconnection cables.
27.9 MPLAB ICD 3 In-Circuit Debugger
System
MPLAB ICD 3 In-Circuit Debugger System is Micro-
chip's most cost effective high-speed hardware
debugger/programmer for Microchip Flash Digital Sig-
nal Controller (DSC) and microcontroller (MCU)
devices. It debugs and programs PIC® Flash microcon-
trollers and dsPIC® DSCs with the powerful, yet easy-
to-use graphical user interface of MPLAB Integrated
Development Environment (IDE).
The MPLAB ICD 3 In-Circuit Debugger probe is con-
nected to the design engineer's PC using a high-speed
USB 2.0 interface and is connected to the target with a
connector compatible with the MPLAB ICD 2 or MPLAB
REAL ICE systems (RJ-11). MPLAB ICD 3 supports all
MPLAB ICD 2 headers.
27.10 PICkit 3 In-Circuit Debugger/
Programmer and
PICkit 3 Debug Express
The MPLAB PICkit 3 allows debugging and program-
ming of PIC® and dsPIC® Flash microcontrollers at a
most affordable price point using the powerful graphical
user interface of the MPLAB Integrated Development
Environment (IDE). The MPLAB PICkit 3 is connected
to the design engineer's PC using a full speed USB
interface and can be connected to the target via an
Microchip debug (RJ-11) connector (compatible with
MPLAB ICD 3 and MPLAB REAL ICE). The connector
uses two device I/O pins and the reset line to imple-
ment in-circuit debugging and In-Circuit Serial Pro-
gramming™.
The PICkit 3 Debug Express include the PICkit 3, demo
board and microcontroller, hookup cables and CDROM
with user’s guide, lessons, tutorial, compiler and
MPLAB IDE software.
PIC24FV32KA304 FAMILY
DS39995C-page 254 2011-2012 Microchip Technology Inc.
27.11 PICkit 2 Development
Programmer/Debugger and
PICkit 2 Debug Express
The PICkit™ 2 Development Programmer/Debugger is
a low-cost development tool with an easy to use inter-
face for programming and debugging Microchip’s Flash
families of microcontrollers. The full featured
Windows® programming interface supports baseline
(PIC10F, PIC12F5xx, PIC16F5xx), midrange
(PIC12F6xx, PIC16F), PIC18F, PIC24, dsPIC30,
dsPIC33, and PIC32 families of 8-bit, 16-bit, and 32-bit
microcontrollers, and many Microchip Serial EEPROM
products. With Microchip’s powerful MPLAB Integrated
Development Environment (IDE) the PICkit™ 2
enables in-circuit debugging on most PIC® microcon-
trollers. In-Circuit-Debugging runs, halts and single
steps the program while the PIC microcontroller is
embedded in the application. When halted at a break-
point, the file registers can be examined and modified.
The PICkit 2 Debug Express include the PICkit 2, demo
board and microcontroller, hookup cables and CDROM
with user’s guide, lessons, tutorial, compiler and
MPLAB IDE software.
27.12 MPLAB PM3 Device Programmer
The MPLAB PM3 Device Programmer is a universal,
CE compliant device programmer with programmable
voltage verification at VDDMIN and VDDMAX for
maximum reliability. It features a large LCD display
(128 x 64) for menus and error messages and a modu-
lar, detachable socket assembly to support various
package types. The ICSP™ cable assembly is included
as a standard item. In Stand-Alone mode, the MPLAB
PM3 Device Programmer can read, verify and program
PIC devices without a PC connection. It can also set
code protection in this mode. The MPLAB PM3
connects to the host PC via an RS-232 or USB cable.
The MPLAB PM3 has high-speed communications and
optimized algorithms for quick programming of large
memory devices and incorporates an MMC card for file
storage and data applications.
27.13 Demonstration/Development
Boards, Evaluation Kits, and
Starter Kits
A wide variety of demonstration, development and
evaluation boards for various PIC MCUs and dsPIC
DSCs allows quick application development on fully func-
tional systems. Most boards include prototyping areas for
adding custom circuitry and provide application firmware
and source code for examination and modification.
The boards support a variety of features, including LEDs,
temperature sensors, switches, speakers, RS-232
interfaces, LCD displays, potentiometers and additional
EEPROM memory.
The demonstration and development boards can be
used in teaching environments, for prototyping custom
circuits and for learning about various microcontroller
applications.
In addition to the PICDEM™ and dsPICDEM™ demon-
stration/development board series of circuits, Microchip
has a line of evaluation kits and demonstration software
for analog filter design, KEELOQ® security ICs, CAN,
IrDA®, PowerSmart battery management, SEEVAL®
evaluation system, Sigma-Delta A/D, flow rate sensing,
plus many more.
Also available are starter kits that contain everything
needed to experience the specified device. This usually
includes a single application and debug capability, all
on one board.
Check the Microchip web page (www.microchip.com)
for the complete list of demonstration, development
and evaluation kits.
2011-2012 Microchip Technology Inc. DS39995C-page 255
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28.0 INSTRUCTION SET SUMMARY
The PIC24F instruction set adds many enhancements
to the previous PIC® MCU instruction sets, while
maintaining an easy migration from previous PIC MCU
instruction sets. Most instructions are a single program
memory word. Only three instructions require two
program memory locations.
Each single-word instruction is a 24-bit word divided
into an 8-bit opcode, which specifies the instruction
type and one or more operands, which further specify
the operation of the instruction. The instruction set is
highly orthogonal and is grouped into four basic
categories:
• Word or byte-oriented operations
• Bit-oriented operations
• Literal operations
• Control operations
Table 28-1 lists the general symbols used in describing
the instructions. The PIC24F instruction set summary
in Table 28-2 lists all the instructions, along with the
status flags affected by each instruction.
Most word or byte-oriented W register instructions
(including barrel shift instructions) have three
operands:
• The first source operand, which is typically a
register ‘Wb’ without any address modifier
• The second source operand, which is typically a
register ‘Ws’ with or without an address modifier
• The destination of the result, which is typically a
register ‘Wd’ with or without an address modifier
However, word or byte-oriented file register instructions
have two operands:
• The file register specified by the value, ‘f’
• The destination, which could either be the file
register, ‘f’, or the W0 register, which is denoted
as ‘WREG’
Most bit-oriented instructions (including simple
rotate/shift instructions) have two operands:
• The W register (with or without an address
modifier) or file register (specified by the value of
‘Ws’ or ‘f’)
• The bit in the W register or file register (specified
by a literal value or indirectly by the contents of
register ‘Wb’)
The literal instructions that involve data movement may
use some of the following operands:
• A literal value to be loaded into a W register or file
register (specified by the value of ‘k’)
• The W register or file register where the literal
value is to be loaded (specified by ‘Wb’ or ‘f’)
However, literal instructions that involve arithmetic or
logical operations use some of the following operands:
• The first source operand, which is a register ‘Wb’
without any address modifier
• The second source operand, which is a literal
value
• The destination of the result (only if not the same
as the first source operand), which is typically a
register ‘Wd’ with or without an address modifier
The control instructions may use some of the following
operands:
• A program memory address
• The mode of the table read and table write
instructions
All instructions are a single word, except for certain
double-word instructions, which were made
double-word instructions so that all of the required
information is available in these 48 bits. In the second
word, the 8 MSbs are ‘0’s. If this second word is
executed as an instruction (by itself), it will execute as
a NOP.
Most single-word instructions are executed in a single
instruction cycle, unless a conditional test is true or the
Program Counter (PC) is changed as a result of the
instruction. In these cases, the execution takes two
instruction cycles, with the additional instruction
cycle(s) executed as a NOP. Notable exceptions are the
BRA (unconditional/computed branch), indirect
CALL/GOTO, all table reads and writes, and
RETURN/RETFIE instructions, which are single-word
instructions but take two or three cycles.
Certain instructions that involve skipping over the
subsequent instruction require either two or three
cycles if the skip is performed, depending on whether
the instruction being skipped is a single-word or
two-word instruction. Moreover, double-word moves
require two cycles. The double-word instructions
execute in two instruction cycles.
Note: This chapter is a brief summary of the
PIC24F instruction set architecture and is
not intended to be a comprehensive
reference source.
PIC24FV32KA304 FAMILY
DS39995C-page 256 2011-2012 Microchip Technology Inc.
TABLE 28-1: SYMBOLS USED IN OPCODE DESCRIPTIONS
Field Description
#text Means literal defined by “text”
(text) Means “content of text”
[text] Means “the location addressed by text”
{ } Optional field or operation
<n:m> Register bit field
.b Byte mode selection
.d Double-Word mode selection
.S Shadow register select
.w Word mode selection (default)
bit4 4-bit bit selection field (used in word addressed instructions) {0...15}
C, DC, N, OV, Z MCU Status bits: Carry, Digit Carry, Negative, Overflow, Sticky Zero
Expr Absolute address, label or expression (resolved by the linker)
f File register address {0000h...1FFFh}
lit1 1-bit unsigned literal {0,1}
lit4 4-bit unsigned literal {0...15}
lit5 5-bit unsigned literal {0...31}
lit8 8-bit unsigned literal {0...255}
lit10 10-bit unsigned literal {0...255} for Byte mode, {0:1023} for Word mode
lit14 14-bit unsigned literal {0...16384}
lit16 16-bit unsigned literal {0...65535}
lit23 23-bit unsigned literal {0...8388608}; LSB must be ‘0’
None Field does not require an entry, may be blank
PC Program Counter
Slit10 10-bit signed literal {-512...511}
Slit16 16-bit signed literal {-32768...32767}
Slit6 6-bit signed literal {-16...16}
Wb Base W register {W0..W15}
Wd Destination W register { Wd, [Wd], [Wd++], [Wd--], [++Wd], [--Wd] }
Wdo Destination W register
{ Wnd, [Wnd], [Wnd++], [Wnd--], [++Wnd], [--Wnd], [Wnd+Wb] }
Wm,Wn Dividend, Divisor working register pair (direct addressing)
Wn One of 16 working registers {W0..W15}
Wnd One of 16 destination working registers {W0..W15}
Wns One of 16 source working registers {W0..W15}
WREG W0 (working register used in File register instructions)
Ws Source W register { Ws, [Ws], [Ws++], [Ws--], [++Ws], [--Ws] }
Wso Source W register { Wns, [Wns], [Wns++], [Wns--], [++Wns], [--Wns], [Wns+Wb] }
2011-2012 Microchip Technology Inc. DS39995C-page 257
PIC24FV32KA304 FAMILY
TABLE 28-2: INSTRUCTION SET OVERVIEW
Assembly
Mnemonic Assembly Syntax Description # of
Words # of
Cycles Status Flags
Affected
ADD ADD f f = f + WREG 1 1 C, DC, N, OV, Z
ADD f,WREG WREG = f + WREG 1 1 C, DC, N, OV, Z
ADD #lit10,Wn Wd = lit10 + Wd 1 1 C, DC, N, OV, Z
ADD Wb,Ws,Wd Wd = Wb + Ws 1 1 C, DC, N, OV, Z
ADD Wb,#lit5,Wd Wd = Wb + lit5 1 1 C, DC, N, OV, Z
ADDC ADDC f f = f + WREG + (C) 1 1 C, DC, N, OV, Z
ADDC f,WREG WREG = f + WREG + (C) 1 1 C, DC, N, OV, Z
ADDC #lit10,Wn Wd = lit10 + Wd + (C) 1 1 C, DC, N, OV, Z
ADDC Wb,Ws,Wd Wd = Wb + Ws + (C) 1 1 C, DC, N, OV, Z
ADDC Wb,#lit5,Wd Wd = Wb + lit5 + (C) 1 1 C, DC, N, OV, Z
AND AND f f = f .AND. WREG 1 1 N, Z
AND f,WREG WREG = f .AND. WREG 1 1 N, Z
AND #lit10,Wn Wd = lit10 .AND. Wd 1 1 N, Z
AND Wb,Ws,Wd Wd = Wb .AND. Ws 1 1 N, Z
AND Wb,#lit5,Wd Wd = Wb .AND. lit5 1 1 N, Z
ASR ASR f f = Arithmetic Right Shift f 1 1 C, N, OV, Z
ASR f,WREG WREG = Arithmetic Right Shift f 1 1 C, N, OV, Z
ASR Ws,Wd Wd = Arithmetic Right Shift Ws 1 1 C, N, OV, Z
ASR Wb,Wns,Wnd Wnd = Arithmetic Right Shift Wb by Wns 1 1 N, Z
ASR Wb,#lit5,Wnd Wnd = Arithmetic Right Shift Wb by lit5 1 1 N, Z
BCLR BCLR f,#bit4 Bit Clear f 1 1 None
BCLR Ws,#bit4 Bit Clear Ws 1 1 None
BRA BRA C,Expr Branch if Carry 1 1 (2) None
BRA GE,Expr Branch if Greater than or Equal 1 1 (2) None
BRA GEU,Expr Branch if Unsigned Greater than or Equal 1 1 (2) None
BRA GT,Expr Branch if Greater than 1 1 (2) None
BRA GTU,Expr Branch if Unsigned Greater than 1 1 (2) None
BRA LE,Expr Branch if Less than or Equal 1 1 (2) None
BRA LEU,Expr Branch if Unsigned Less than or Equal 1 1 (2) None
BRA LT,Expr Branch if Less than 1 1 (2) None
BRA LTU,Expr Branch if Unsigned Less than 1 1 (2) None
BRA N,Expr Branch if Negative 1 1 (2) None
BRA NC,Expr Branch if Not Carry 1 1 (2) None
BRA NN,Expr Branch if Not Negative 1 1 (2) None
BRA NOV,Expr Branch if Not Overflow 1 1 (2) None
BRA NZ,Expr Branch if Not Zero 1 1 (2) None
BRA OV,Expr Branch if Overflow 1 1 (2) None
BRA Expr Branch Unconditionally 1 2 None
BRA Z,Expr Branch if Zero 1 1 (2) None
BRA Wn Computed Branch 1 2 None
BSET BSET f,#bit4 Bit Set f 1 1 None
BSET Ws,#bit4 Bit Set Ws 1 1 None
BSW BSW.C Ws,Wb Write C bit to Ws<Wb> 1 1 None
BSW.Z Ws,Wb Write Z bit to Ws<Wb> 1 1 None
BTG BTG f,#bit4 Bit Toggle f 1 1 None
BTG Ws,#bit4 Bit Toggle Ws 1 1 None
BTSC BTSC f,#bit4 Bit Test f, Skip if Clear 1 1
(2 or 3)
None
BTSC Ws,#bit4 Bit Test Ws, Skip if Clear 1 1
(2 or 3)
None
PIC24FV32KA304 FAMILY
DS39995C-page 258 2011-2012 Microchip Technology Inc.
BTSS BTSS f,#bit4 Bit Test f, Skip if Set 1 1
(2 or 3)
None
BTSS Ws,#bit4 Bit Test Ws, Skip if Set 1 1
(2 or 3)
None
BTST BTST f,#bit4 Bit Test f 1 1 Z
BTST.C Ws,#bit4 Bit Test Ws to C 1 1 C
BTST.Z Ws,#bit4 Bit Test Ws to Z 1 1 Z
BTST.C Ws,Wb Bit Test Ws<Wb> to C 1 1 C
BTST.Z Ws,Wb Bit Test Ws<Wb> to Z 1 1 Z
BTSTS BTSTS f,#bit4 Bit Test then Set f 1 1 Z
BTSTS.C Ws,#bit4 Bit Test Ws to C, then Set 1 1 C
BTSTS.Z Ws,#bit4 Bit Test Ws to Z, then Set 1 1 Z
CALL CALL lit23 Call Subroutine 2 2 None
CALL Wn Call Indirect Subroutine 1 2 None
CLR CLR f f = 0x0000 1 1 None
CLR WREG WREG = 0x0000 1 1 None
CLR Ws Ws = 0x0000 1 1 None
CLRWDT CLRWDT Clear Watchdog Timer 1 1 WDTO, Sleep
COM COM f f = f 11N, Z
COM f,WREG WREG = f 11N, Z
COM Ws,Wd Wd = Ws 11N, Z
CP CP f Compare f with WREG 1 1 C, DC, N, OV, Z
CP Wb,#lit5 Compare Wb with lit5 1 1 C, DC, N, OV, Z
CP Wb,Ws Compare Wb with Ws (Wb – Ws) 1 1 C, DC, N, OV, Z
CP0 CP0 f Compare f with 0x0000 1 1 C, DC, N, OV, Z
CP0 Ws Compare Ws with 0x0000 1 1 C, DC, N, OV, Z
CPB CPB f Compare f with WREG, with Borrow 1 1 C, DC, N, OV, Z
CPB Wb,#lit5 Compare Wb with lit5, with Borrow 1 1 C, DC, N, OV, Z
CPB Wb,Ws Compare Wb with Ws, with Borrow
(Wb – Ws – C)
1 1 C, DC, N, OV, Z
CPSEQ CPSEQ Wb,Wn Compare Wb with Wn, Skip if = 1 1
(2 or 3)
None
CPSGT CPSGT Wb,Wn Compare Wb with Wn, Skip if > 1 1
(2 or 3)
None
CPSLT CPSLT Wb,Wn Compare Wb with Wn, Skip if < 1 1
(2 or 3)
None
CPSNE CPSNE Wb,Wn Compare Wb with Wn, Skip if 11
(2 or 3)
None
DAW DAW Wn Wn = Decimal Adjust Wn 1 1 C
DEC DEC f f = f –1 1 1 C, DC, N, OV, Z
DEC f,WREG WREG = f –1 1 1 C, DC, N, OV, Z
DEC Ws,Wd Wd = Ws – 1 1 1 C, DC, N, OV, Z
DEC2 DEC2 f f = f – 2 1 1 C, DC, N, OV, Z
DEC2 f,WREG WREG = f – 2 1 1 C, DC, N, OV, Z
DEC2 Ws,Wd Wd = Ws – 2 1 1 C, DC, N, OV, Z
DISI DISI #lit14 Disable Interrupts for k Instruction Cycles 1 1 None
DIV DIV.SW Wm,Wn Signed 16/16-bit Integer Divide 1 18 N, Z, C, OV
DIV.SD Wm,Wn Signed 32/16-bit Integer Divide 1 18 N, Z, C, OV
DIV.UW Wm,Wn Unsigned 16/16-bit Integer Divide 1 18 N, Z, C, OV
DIV.UD Wm,Wn Unsigned 32/16-bit Integer Divide 1 18 N, Z, C, OV
EXCH EXCH Wns,Wnd Swap Wns with Wnd 1 1 None
FF1L FF1L Ws,Wnd Find First One from Left (MSb) Side 1 1 C
FF1R FF1R Ws,Wnd Find First One from Right (LSb) Side 1 1 C
TABLE 28-2: INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic Assembly Syntax Description # of
Words # of
Cycles Status Flags
Affected
2011-2012 Microchip Technology Inc. DS39995C-page 259
PIC24FV32KA304 FAMILY
GOTO GOTO Expr Go to Address 2 2 None
GOTO Wn Go to Indirect 1 2 None
INC INC f f = f + 1 1 1 C, DC, N, OV, Z
INC f,WREG WREG = f + 1 1 1 C, DC, N, OV, Z
INC Ws,Wd Wd = Ws + 1 1 1 C, DC, N, OV, Z
INC2 INC2 f f = f + 2 1 1 C, DC, N, OV, Z
INC2 f,WREG WREG = f + 2 1 1 C, DC, N, OV, Z
INC2 Ws,Wd Wd = Ws + 2 1 1 C, DC, N, OV, Z
IOR IOR f f = f .IOR. WREG 1 1 N, Z
IOR f,WREG WREG = f .IOR. WREG 1 1 N, Z
IOR #lit10,Wn Wd = lit10 .IOR. Wd 1 1 N, Z
IOR Wb,Ws,Wd Wd = Wb .IOR. Ws 1 1 N, Z
IOR Wb,#lit5,Wd Wd = Wb .IOR. lit5 1 1 N, Z
LNK LNK #lit14 Link Frame Pointer 1 1 None
LSR LSR f f = Logical Right Shift f 1 1 C, N, OV, Z
LSR f,WREG WREG = Logical Right Shift f 1 1 C, N, OV, Z
LSR Ws,Wd Wd = Logical Right Shift Ws 1 1 C, N, OV, Z
LSR Wb,Wns,Wnd Wnd = Logical Right Shift Wb by Wns 1 1 N, Z
LSR Wb,#lit5,Wnd Wnd = Logical Right Shift Wb by lit5 1 1 N, Z
MOV MOV f,Wn Move f to Wn 1 1 None
MOV [Wns+Slit10],Wnd Move [Wns+Slit10] to Wnd 1 1 None
MOV f Move f to f 1 1 N, Z
MOV f,WREG Move f to WREG 1 1 N, Z
MOV #lit16,Wn Move 16-bit Literal to Wn 1 1 None
MOV.b #lit8,Wn Move 8-bit Literal to Wn 1 1 None
MOV Wn,f Move Wn to f 1 1 None
MOV Wns,[Wns+Slit10] Move Wns to [Wns+Slit10] 1 1 None
MOV Wso,Wdo Move Ws to Wd 1 1 None
MOV WREG,f Move WREG to f 1 1 N, Z
MOV.D Wns,Wd Move Double from W(ns):W(ns+1) to Wd 1 2 None
MOV.D Ws,Wnd Move Double from Ws to W(nd+1):W(nd) 1 2 None
MUL MUL.SS Wb,Ws,Wnd {Wnd+1, Wnd} = Signed(Wb) * Signed(Ws) 1 1 None
MUL.SU Wb,Ws,Wnd {Wnd+1, Wnd} = Signed(Wb) * Unsigned(Ws) 1 1 None
MUL.US Wb,Ws,Wnd {Wnd+1, Wnd} = Unsigned(Wb) * Signed(Ws) 1 1 None
MUL.UU Wb,Ws,Wnd {Wnd+1, Wnd} = Unsigned(Wb) * Unsigned(Ws) 1 1 None
MUL.SU Wb,#lit5,Wnd {Wnd+1, Wnd} = Signed(Wb) * Unsigned(lit5) 1 1 None
MUL.UU Wb,#lit5,Wnd {Wnd+1, Wnd} = Unsigned(Wb) * Unsigned(lit5) 1 1 None
MUL f W3:W2 = f * WREG 1 1 None
NEG NEG f f = f + 1 1 1 C, DC, N, OV, Z
NEG f,WREG WREG = f + 1 1 1 C, DC, N, OV, Z
NEG Ws,Wd Wd = Ws + 1 1 1 C, DC, N, OV, Z
NOP NOP No Operation 1 1 None
NOPR No Operation 1 1 None
POP POP f Pop f from Top-of-Stack (TOS) 1 1 None
POP Wdo Pop from Top-of-Stack (TOS) to Wdo 1 1 None
POP.D Wnd Pop from Top-of-Stack (TOS) to
W(nd):W(nd+1)
1 2 None
POP.S Pop Shadow Registers 1 1 All
PUSH PUSH f Push f to Top-of-Stack (TOS) 1 1 None
PUSH Wso Push Wso to Top-of-Stack (TOS) 1 1 None
PUSH.D Wns Push W(ns):W(ns+1) to Top-of-Stack (TOS) 1 2 None
PUSH.S Push Shadow Registers 1 1 None
TABLE 28-2: INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic Assembly Syntax Description # of
Words # of
Cycles Status Flags
Affected
PIC24FV32KA304 FAMILY
DS39995C-page 260 2011-2012 Microchip Technology Inc.
PWRSAV PWRSAV #lit1 Go into Sleep or Idle mode 1 1 WDTO, Sleep
RCALL RCALL Expr Relative Call 1 2 None
RCALL Wn Computed Call 1 2 None
REPEAT REPEAT #lit14 Repeat Next Instruction lit14 + 1 times 1 1 None
REPEAT Wn Repeat Next Instruction (Wn) + 1 times 1 1 None
RESET RESET Software Device Reset 1 1 None
RETFIE RETFIE Return from Interrupt 1 3 (2) None
RETLW RETLW #lit10,Wn Return with Literal in Wn 1 3 (2) None
RETURN RETURN Return from Subroutine 1 3 (2) None
RLC RLC f f = Rotate Left through Carry f 1 1 C, N, Z
RLC f,WREG WREG = Rotate Left through Carry f 1 1 C, N, Z
RLC Ws,Wd Wd = Rotate Left through Carry Ws 1 1 C, N, Z
RLNC RLNC f f = Rotate Left (No Carry) f 1 1 N, Z
RLNC f,WREG WREG = Rotate Left (No Carry) f 1 1 N, Z
RLNC Ws,Wd Wd = Rotate Left (No Carry) Ws 1 1 N, Z
RRC RRC f f = Rotate Right through Carry f 1 1 C, N, Z
RRC f,WREG WREG = Rotate Right through Carry f 1 1 C, N, Z
RRC Ws,Wd Wd = Rotate Right through Carry Ws 1 1 C, N, Z
RRNC RRNC f f = Rotate Right (No Carry) f 1 1 N, Z
RRNC f,WREG WREG = Rotate Right (No Carry) f 1 1 N, Z
RRNC Ws,Wd Wd = Rotate Right (No Carry) Ws 1 1 N, Z
SE SE Ws,Wnd Wnd = Sign-Extended Ws 1 1 C, N, Z
SETM SETM f f = FFFFh 1 1 None
SETM WREG WREG = FFFFh 1 1 None
SETM Ws Ws = FFFFh 1 1 None
SL SL f f = Left Shift f 1 1 C, N, OV, Z
SL f,WREG WREG = Left Shift f 1 1 C, N, OV, Z
SL Ws,Wd Wd = Left Shift Ws 1 1 C, N, OV, Z
SL Wb,Wns,Wnd Wnd = Left Shift Wb by Wns 1 1 N, Z
SL Wb,#lit5,Wnd Wnd = Left Shift Wb by lit5 1 1 N, Z
SUB SUB f f = f – WREG 1 1 C, DC, N, OV, Z
SUB f,WREG WREG = f – WREG 1 1 C, DC, N, OV, Z
SUB #lit10,Wn Wn = Wn – lit10 1 1 C, DC, N, OV, Z
SUB Wb,Ws,Wd Wd = Wb – Ws 1 1 C, DC, N, OV, Z
SUB Wb,#lit5,Wd Wd = Wb – lit5 1 1 C, DC, N, OV, Z
SUBB SUBB f f = f – WREG – (C) 1 1 C, DC, N, OV, Z
SUBB f,WREG WREG = f – WREG – (C) 1 1 C, DC, N, OV, Z
SUBB #lit10,Wn Wn = Wn – lit10 – (C) 1 1 C, DC, N, OV, Z
SUBB Wb,Ws,Wd Wd = Wb – Ws – (C) 1 1 C, DC, N, OV, Z
SUBB Wb,#lit5,Wd Wd = Wb – lit5 – (C) 1 1 C, DC, N, OV, Z
SUBR SUBR f f = WREG – f 1 1 C, DC, N, OV, Z
SUBR f,WREG WREG = WREG – f 1 1 C, DC, N, OV, Z
SUBR Wb,Ws,Wd Wd = Ws – Wb 1 1 C, DC, N, OV, Z
SUBR Wb,#lit5,Wd Wd = lit5 – Wb 1 1 C, DC, N, OV, Z
SUBBR SUBBR f f = WREG – f – (C) 1 1 C, DC, N, OV, Z
SUBBR f,WREG WREG = WREG – f – (C) 1 1 C, DC, N, OV, Z
SUBBR Wb,Ws,Wd Wd = Ws – Wb – (C) 1 1 C, DC, N, OV, Z
SUBBR Wb,#lit5,Wd Wd = lit5 – Wb – (C) 1 1 C, DC, N, OV, Z
SWAP SWAP.b Wn Wn = Nibble Swap Wn 1 1 None
SWAP Wn Wn = Byte Swap Wn 1 1 None
TBLRDH TBLRDH Ws,Wd Read Prog<23:16> to Wd<7:0> 1 2 None
TABLE 28-2: INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic Assembly Syntax Description # of
Words # of
Cycles Status Flags
Affected
2011-2012 Microchip Technology Inc. DS39995C-page 261
PIC24FV32KA304 FAMILY
TBLRDL TBLRDL Ws,Wd Read Prog<15:0> to Wd 1 2 None
TBLWTH TBLWTH Ws,Wd Write Ws<7:0> to Prog<23:16> 1 2 None
TBLWTL TBLWTL Ws,Wd Write Ws to Prog<15:0> 1 2 None
ULNK ULNK Unlink Frame Pointer 1 1 None
XOR XOR f f = f .XOR. WREG 1 1 N, Z
XOR f,WREG WREG = f .XOR. WREG 1 1 N, Z
XOR #lit10,Wn Wd = lit10 .XOR. Wd 1 1 N, Z
XOR Wb,Ws,Wd Wd = Wb .XOR. Ws 1 1 N, Z
XOR Wb,#lit5,Wd Wd = Wb .XOR. lit5 1 1 N, Z
ZE ZE Ws,Wnd Wnd = Zero-Extend Ws 1 1 C, Z, N
TABLE 28-2: INSTRUCTION SET OVERVIEW (CONTINUED)
Assembly
Mnemonic Assembly Syntax Description # of
Words # of
Cycles Status Flags
Affected
PIC24FV32KA304 FAMILY
DS39995C-page 262 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 263
PIC24FV32KA304 FAMILY
29.0 ELECTRICAL CHARACTERISTICS
This section provides an overview of the PIC24FV32KA304 family electrical characteristics. Additional information will
be provided in future revisions of this document as it becomes available.
Absolute maximum ratings for the PIC24FV32KA304 family devices are listed below. Exposure to these maximum rating
conditions for extended periods may affect device reliability. Functional operation of the device at these, or any other
conditions above the parameters indicated in the operation listings of this specification, is not implied.
Absolute Maximum Ratings(†)
Ambient temperature under bias.............................................................................................................-40°C to +125°C
Storage temperature .............................................................................................................................. -65°C to +150°C
Voltage on VDD with respect to VSS (PIC24FVXXKA30X) ....................................................................... -0.3V to +6.5V
Voltage on VDD with respect to VSS (PIC24FXXKA30X) .......................................................................... -0.3V to +4.5V
Voltage on any combined analog and digital pin with respect to VSS ............................................ -0.3V to (VDD + 0.3V)
Voltage on any digital only pin with respect to VSS ....................................................................... -0.3V to (VDD + 0.3V)
Voltage on MCLR/VPP pin with respect to VSS ......................................................................................... -0.3V to +9.0V
Maximum current out of VSS pin ...........................................................................................................................300 mA
Maximum current into VDD pin(1)...........................................................................................................................250 mA
Maximum output current sunk by any I/O pin..........................................................................................................25 mA
Maximum output current sourced by any I/O pin ....................................................................................................25 mA
Maximum current sunk by all ports .......................................................................................................................200 mA
Maximum current sourced by all ports(1)...............................................................................................................200 mA
Note 1: Maximum allowable current is a function of the device maximum power dissipation (see Tab l e 2 9 - 1 ).
†NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above
those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions
for extended periods may affect device reliability.
PIC24FV32KA304 FAMILY
DS39995C-page 264 2011-2012 Microchip Technology Inc.
29.1 DC Characteristics
FIGURE 29-1: PIC24FV32KA304 VOLTAGE-FREQUENCY GRAPH (INDUSTRIAL)
FIGURE 29-2: PIC24F32KA304 FAMILY VOLTAGE-FREQUENCY GRAPH (INDUSTRIAL)
Frequency
Volt age (VDD)
2.00V
32 MHz
5.5V
3.20V
5.5V
8 MHz
3.20V
Note: For frequencies between 8 MHz and 32 MHz, FMAX = 20 MHz * (VDD – 2.0) + 8 MHz.
Frequency
Voltage (VDD)
1.80V
32 MHz
3.60V
3.00V
3.60V
8 MHz
3.00V
Note: For frequencies between 8 MHz and 32 MHz, FMAX = 20 MHz * (VDD – 1.8) + 8 MHz.
2011-2012 Microchip Technology Inc. DS39995C-page 265
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TABLE 29-1: THERMAL OPERATING CONDITIONS
Rating Symbol Min Typ Max Unit
Operating Junction Temperature Range TJ-40 — +125 °C
Operating Ambient Temperature Range TA-40 — +85 °C
Power Dissipation:
Internal Chip Power Dissipation:
PINT = VDD x (IDD – IOH)PDPINT + PI/OW
I/O Pin Power Dissipation:
PI/O = ({VDD – VOH} x IOH) + (VOL x IOL)
Maximum Allowed Power Dissipation PDMAX (TJ – TA)/JA W
TABLE 29-2: THERMAL PACKAGING CHARACTERISTICS
Characteristic Symbol Typ Max Unit Notes
Package Thermal Resistance, 20-Pin SPDIP JA 62.4 — °C/W 1
Package Thermal Resistance, 28-Pin SPDIP JA 60 — °C/W 1
Package Thermal Resistance, 20-Pin SSOP JA 108 — °C/W 1
Package Thermal Resistance, 28-Pin SSOP JA 71 — °C/W 1
Package Thermal Resistance, 20-Pin SOIC JA 75 — °C/W 1
Package Thermal Resistance, 28-Pin SOIC JA 80.2 — °C/W 1
Package Thermal Resistance, 28-Pin QFN JA 32 — °C/W 1
Package Thermal Resistance, 44-Pin QFN JA 29 — °C/W 1
Package Thermal Resistance, 48-Pin UQFN JA ——°C/W1
Note 1: Junction to ambient thermal resistance, Theta-JA (JA) numbers are achieved by package simulations.
TABLE 29-3: DC CHARACTERISTICS: TEMPERATURE AND VOLTAGE SPECIFICATIONS
DC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C TA +85°C for Industrial
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
DC10 VDD Supply Voltage 1.8 — 3.6 V For F devices
2.0 — 5.5 V For FV devices
DC12 VDR RAM Data Retention
Voltage(2)1.5 — — V For F devices
1.7 — — V For FV devices
DC16 VPOR VDD Start Voltage
to Ensure Internal
Power-on Reset Signal
VSS —0.7V
DC17 SVDD VDD Rise Rate
to Ensure Internal
Power-on Reset Signal
0.05 — — V/ms 0-3.3V in 0.1s
0-2.5V in 60 ms
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
2: This is the limit to which VDD can be lowered without losing RAM data.
PIC24FV32KA304 FAMILY
DS39995C-page 266 2011-2012 Microchip Technology Inc.
TABLE 29-4: HIGH/LOW–VOLTAGE DETECT CHARACTERISTICS
TABLE 29-5: BOR TRIP POINTS
Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C TA +85°C for Industrial
Param
No. Symbol Characteristic Min Typ Max Units Conditions
DC18 VHLVD HLVD Voltage on
VDD Transition
HLVDL<3:0> = 0000(2)——1.90V
HLVDL<3:0> = 0001 1.88 — 2.13 V
HLVDL<3:0> = 0010 2.09 — 2.35 V
HLVDL<3:0> = 0011 2.25 — 2.53 V
HLVDL<3:0> = 0100 2.35 — 2.62 V
HLVDL<3:0> = 0101 2.55 — 2.84 V
HLVDL<3:0> = 0110 2.80 — 3.10 V
HLVDL<3:0> = 0111 2.95 — 3.25 V
HLVDL<3:0> = 1000 3.09 — 3.41 V
HLVDL<3:0> = 1001 3.27 — 3.59 V
HLVDL<3:0> = 1010(1)3.46 — 3.79 V
HLVDL<3:0> = 1011(1)3.62 — 4.01 V
HLVDL<3:0> = 1100(1)3.91 — 4.26 V
HLVDL<3:0> = 1101(1)4.18 — 4.55 V
HLVDL<3:0> = 1110(1)4.49 — 4.87 V
Note 1: These trip points should not be used on PIC24FXXKA30X devices.
2: This trip point should not be used on PIC24FVXXKA30X devices.
Standa r d Op er a tin g C o ndi tio ns: 1.8V to 3.6V PIC 2 4F 32 K A3XX
2.0V to 5.5V PIC 2 4F V32 KA 3X X
Operating temperature -40°C TA +85°C for Industrial
Param
No. Sym Characteristic Min Typ Max Units Conditions
DC15 BOR Hysteresis — 5 — mV
DC19 BOR Voltage on VDD
Transition
BORV<1:0> = 00 — — — — Valid for LPBOR and DSBOR
(Note 1)
BORV<1:0> = 01 2.90 3 3.38 V
BORV<1:0> = 10 2.53 2.7 3.07 V
BORV<1:0> = 11 1.75 1.85 2.05 V (Note 2)
BORV<1:0> = 11 1.95 2.05 2.16 V (Note 3)
Note 1: LPBOR re-arms the POR circuit but does not cause a BOR.
2: This is valid for PIC24F (3.3V) devices.
3: This is valid for PIC24FV (5V) devices.
2011-2012 Microchip Technology Inc. DS39995C-page 267
PIC24FV32KA304 FAMILY
TABLE 29-6: DC CHARACTERISTICS: OPERATING CURRENT (IDD)
DC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C TA +85°C for Industrial
Parameter No. Device Typical Max Units Conditions
IDD Current
D20 PIC24FV32KA3XX 269 450 µA 2.0V
0.5 MIPS,
FOSC = 1 MHz(1)
465 830 µA 5.0V
PIC24F32KA3XX 200 330 µA 1.8V
410 750 µA 3.3V
DC22 PIC24FV32KA3XX 490 —µA 2.0V
1 MIPS,
FOSC = 2 MHz(1)
880 —µA 5.0V
PIC24F32KA3XX 407 — µA 1.8V
800 — µA 3.3V
DC24 PIC24FV32KA3XX 13.0 20.0 mA 5.0V 16 MIPS,
FOSC = 32 MHz(1)
PIC24F32KA3XX 12.0 18.0 mA 3.3V
DC26 PIC24FV32KA3XX 2.0 —mA 2.0V
FRC (4 MIPS),
FOSC = 8 MHz
3.5 —mA 5.0V
PIC24F32KA3XX 1.80 — mA 1.8V
3.40 — mA 3.3V
DC30 PIC24FV32KA3XX 48.0 250 µA 2.0V
LPRC (15.5 KIPS),
FOSC = 31 kHz
75.0 275 µA 5.0V
PIC24F32KA3XX 8.1 28.0 µA 1.8V
13.50 55.00 µA 3.3V
Legend: Unshaded rows represent PIC24F32KA3XX devices and shaded rows represent PIC24FV32KA3XX devices.
Note 1: Oscillator is in External Clock mode (FOSCSEL<2:0> = 010, FOSC<1:0> = 00).
PIC24FV32KA304 FAMILY
DS39995C-page 268 2011-2012 Microchip Technology Inc.
TABLE 29-7: DC CHARACTERISTICS: IDLE CURRENT (IIDLE)
DC CHARACTERISTICS Standard Operat i ng Conditions: 1.8V to 3 .6 V PIC 24F32KA 3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C T
A +85°C for Industrial
Parameter No. Device Typical Max Units Conditions
Idle Cu rren t (IIDLE)
DC40 PIC24FV32KA3XX 120 200 µA 2.0V
0.5 MIPS,
FOSC = 1 MHz(1)
160 430 µA 5.0V
PIC24F32KA3XX 50 100 µA 1.8V
90 370 µA 3.3V
DC42 PIC24FV32KA3XX 165 —µA 2.0V
1 MIPS,
FOSC = 2 MHz(1)
260 —µA 5.0V
PIC24F32KA3XX 95 — µA 1.8V
180 — µA 3.3V
DC44 PIC24FV32KA3XX 3.1 6.5 mA 5.0V 16 MIPS,
FOSC = 32 MHz(1)
PIC24F32KA3XX 2.9 6.0 mA 3.3V
DC46 PIC24FV32KA3XX 0.65 —mA 2.0V
FRC (4 MIPS),
FOSC = 8 MHz
1.0 —mA 5.0V
PIC24F32KA3XX 0.55 — mA 1.8V
1.0 — mA 3.3V
DC50 PIC24FV32KA3XX 60 200 µA 2.0V
LPRC (15.5 KIPS),
FOSC = 31 kHz
70 225 µA 5.0V
PIC24F32KA3XX 2.2 18 µA 1.8V
4.0 40 µA 3.3V
Legend: Unshaded rows represent PIC24F32KA3XX devices and shaded rows represent PIC24FV32KA3XX devices.
Note 1: Oscillator is in External Clock mode (FOSCSEL<2:0> = 010, FOSC<1:0> = 00).
2011-2012 Microchip Technology Inc. DS39995C-page 269
PIC24FV32KA304 FAMILY
TABLE 29-8: DC CHARACTERISTICS: POWER-DOWN CURRENT (IPD)
DC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C TA +85°C for Industrial
Parameter
No. Device Typical(1)Max Units Conditions
Power-Down Current (IPD)
DC60 PIC24FV32KA3XX
6.0
—
µA
-40°C
2.0V
Sleep Mode(2)
8.0 +25°C
8.5 +60°C
9.0 +85°C
6.0
—
µA
-40°C
5.0V
8.0 +25°C
9.0 +60°C
10.0 +85°C
PIC24F32KA3XX
0.025
—
µA
-40°C
1.8V
0.80 +25°C
1.5 +60°C
2.0 +85°C
0.040
—
µA
-40°C
3.3V
1.0 +25°C
2.0 +60°C
3.0 +85°C
DC61 PIC24FV32KA3XX 0.25 —µA -40°C 2.0V Low-Voltage
Sleep Mode(2)
0.35 3.0 µA +85°C 5.0V
DC70 PIC24FV32KA3XX 0.03 —µA -40°C 2.0V
Deep Sleep Mode
0.10 1.2 µA +85°C 5.0V
PIC24F32KA3XX 0.02 – µA -40°C 1.8V
0.08 1.2 µA +85°C 3.3V
Legend: Unshaded rows represent PIC24F32KA3XX devices and shaded rows represent PIC24FV32KA3XX
devices.
Note 1: Data in the Typical column is at 3.3V, +25°C (PIC24F32KA3XX) or 5.0V, +25°C (PIC24FV32KA3XX)
unless otherwise stated. Parameters are for design guidance only and are not tested.
2: Base IPD is measured with all peripherals and clocks shut down. All I/Os are configured as outputs and set
low, PMSLP is set to ‘0’ and WDT, etc., are all switched off.
3: The current is the additional current consumed when the module is enabled. This current should be
added to the base IPD current.
4: This current applies to Sleep only.
5: This current applies to Sleep and Deep Sleep.
6: This current applies to Deep Sleep only.
PIC24FV32KA304 FAMILY
DS39995C-page 270 2011-2012 Microchip Technology Inc.
Module Differential Current (IPD)(3)
DC71 PIC24FV32KA3XX 0.50 —µA -40°C 2.0V
Watchdog Timer
Current:
WDT(4)
0.70 1.5 µA +85°C 5.0V
PIC24F32KA3XX 0.50 — µA -40°C 1.8V
0.70 1.5 µA +85°C 3.3V
DC72 PIC24FV32KA3XX 0.80 —µA -40°C 2.0V 32 kHz Crystal with RTCC,
DSWDT or Timer1:
SOSC
(SOSCSEL = 0)(5)
1.50 2.0 µA +85°C 5.0V
PIC24F32KA3XX 0.70 — µA -40°C 1.8V
1.0 1.5 µA +85°C 3.3V
DC75 PIC24FV32KA3XX 5.4 —µA -40°C 2.0V
HLVD(4)
8.1 14.0 µA +85°C 5.0V
PIC24F32KA3XX 4.9 — µA -40°C 1.8V
7.5 14.0 µA +85°C 3.3V
DC76 PIC24FV32KA3XX 5.6 —µA -40°C 2.0V
BOR(4)
6.5 11.2 µA -40°C 5.0V
PIC24F32KA3XX 5.6 — µA -40°C 1.8V
6.0 11.2 µA +85°C 3.3V
DC78 PIC24FV32KA3XX 0.03 —µA -40°C 2.0V
Deep Sleep BOR:
LPBOR(5)
0.05 0.20 µA +85°C 5.0V
PIC24F32KA3XX 0.03 — µA -40°C 1.8V
0.05 0.20 µA +85°C 3.3V
DC80 PIC24FV32KA3XX 0.20 —µA -40°C 2.0V
Deep Sleep WDT:
DSWDT (LPRC)(6)
0.70 1.5 µA +85°C 5.0V
PIC24F32KA3XX 0.20 — µA -40°C 1.8V
0.35 0.8 µA +85°C 3.3V
TABLE 29-8: DC CHARACTERISTICS: POWER-DOWN CURRENT (IPD) (CON T IN UED)
DC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C TA +85°C for Industrial
Parameter
No. Device Typical(1)Max Units Conditions
Legend: Unshaded rows represent PIC24F32KA3XX devices and shaded rows represent PIC24FV32KA3XX
devices.
Note 1: Data in the Typical column is at 3.3V, +25°C (PIC24F32KA3XX) or 5.0V, +25°C (PIC24FV32KA3XX)
unless otherwise stated. Parameters are for design guidance only and are not tested.
2: Base IPD is measured with all peripherals and clocks shut down. All I/Os are configured as outputs and set
low, PMSLP is set to ‘0’ and WDT, etc., are all switched off.
3: The current is the additional current consumed when the module is enabled. This current should be
added to the base IPD current.
4: This current applies to Sleep only.
5: This current applies to Sleep and Deep Sleep.
6: This current applies to Deep Sleep only.
2011-2012 Microchip Technology Inc. DS39995C-page 271
PIC24FV32KA304 FAMILY
TABLE 29-9: DC CHARACTERISTICS: I/O PIN INPUT SPECIFICATIONS
DC CHARACTERISTICS Standard Operating Conditions: 1 .8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C T
A +85°C for Industrial
Param
No. Sym Characteristic Min Typ(1)Max Units Conditions
VIL Input Low Voltage(4)————
DI10 I/O Pins VSS — 0.2 VDD V
DI15 MCLR VSS — 0.2 VDD V
DI16 OSCI (XT mode) VSS — 0.2 VDD V
DI17 OSCI (HS mode) VSS — 0.2 VDD V
DI18 I/O Pins with I2C™ Buffer VSS — 0.3 VDD V SMBus is disabled
DI19 I/O Pins with SMBus Buffer VSS — 0.8 V SMBus is enabled
VIH Input Hi gh Volt a ge(4) ————
DI20 I/O Pins:
with Analog Functions
Digital Only
0.8 VDD
0.8 VDD
—
—
VDD
VDD
V
V
DI25 MCLR 0.8 VDD —VDD V
DI26 OSCI (XT mode) 0.7 VDD —VDD V
DI27 OSCI (HS mode) 0.7 VDD —VDD V
DI28 I/O Pins with I2C Buffer:
with Analog Functions
Digital Only
0.7 VDD
0.7 VDD
—
—
VDD
VDD
V
V
DI29 I/O Pins with SMBus 2.1 — VDD V2.5V VPIN VDD
DI30 ICNPU CNx Pull-up Current 50 250 500 AVDD = 3.3V, VPIN = VSS
IIL Input Leakage
Current(2,3)
DI50 I/O Ports — 0.05 0.1 AVSS VPIN VDD,
Pin at high-impedance
DI55 MCLR ——0.1AVSS VPIN VDD
DI56 OSCI — — 5 AVSS VPIN VDD,
XT and HS modes
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
2: The leakage current on the MCLR pin is strongly dependent on the applied voltage level. The specified
levels represent normal operating conditions. Higher leakage current may be measured at different input
voltages.
3: Negative current is defined as current sourced by the pin.
4: Refer to Ta b l e 1 - 3 for I/O pin buffer types.
PIC24FV32KA304 FAMILY
DS39995C-page 272 2011-2012 Microchip Technology Inc.
TABLE 29-10: DC CHARACTERISTICS: I/O PIN OUTPUT SPECIFICATIONS
DC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C TA +85°C for Industrial
Param
No. Sym Characteristic Min Typ(1)Max Units Conditions
VOL Output Low Voltage ——
DO10 All I/O Pins — — 0.4 V IOL = 8.0 mA VDD = 4.5V
——0.4VIOL = 4.0 mA VDD = 3.6V
——0.4VI
OL = 3.5 mA VDD = 2.0V
DO16 OSC2/CLKO — — 0.4 V IOL = 2.0 mA VDD = 4.5V
——0.4VIOL = 1.2 mA VDD = 3.6V
——0.4VI
OL = 0.4 mA VDD = 2.0V
VOH Output High Volt a ge
DO20 All I/O Pins 3.8 — — V IOH = -3.5 mA VDD = 4.5V
3——VI
OH = -3.0 mA VDD = 3.6V
1.6 — — V IOH = -1.0 mA VDD = 2.0V
DO26 OSC2/CLKO 3.8 — — V IOH = -2.0 mA VDD = 4.5V
3——VI
OH = -1.0 mA VDD = 3.6V
1.6 — — V IOH = -0.5 mA VDD = 2.0V
Note 1: Data in “Typ” column is at +25°C unless otherwise stated. Parameters are for design guidance only and
are not tested.
TABLE 29-11: DC CHARACTERISTICS: PROGRAM MEMORY
DC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C TA +85°C for Industrial
Param
No. Sym Characteristic Min Typ(1)Max Units Conditions
Program Flash Memory
D130 EPCell Endurance 10,000(2)——E/W
D131 VPR VDD for Read VMIN —3.6VVMIN = Minimum operating voltage
D133A TIW Self-Timed Write Cycle
Time
—2—ms
D134 TRETD Characteristic Retention 40 — — Year Provided no other specifications
are violated
D135 IDDP Supply Current During
Programming
—10—mA
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated.
2: Self-write and block erase.
2011-2012 Microchip Technology Inc. DS39995C-page 273
PIC24FV32KA304 FAMILY
TABLE 29-13: DC CHARACTERISTICS: COMPARATOR SPECIFICATIONS
TABLE 29-14: DC CHARACTERISTICS: COMPARATOR VOLTAGE REFERENCE SPECIFICATIONS
TABLE 29-12: DC CHARACTERISTICS: DATA EEPROM MEMORY
DC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C T
A +85°C for Industrial
Param
No. Sym Characteristic Min Typ(1)Max Units Conditions
Data EEPROM Memory
D140 EPD Cell Endurance 100,000 — — E/W
D141 VPRD VDD for Read VMIN —3.6VVMIN = Minimum operating
voltage
D143A TIWD Self-Timed Write Cycle
Time
—4—ms
D143B TREF Number of Total
Write/Erase Cycles
Before Refresh
—10M—E/W
D144 TRETDD Characteristic Retention 40 — — Year Provided no other specifications
are violated
D145 IDDPD Supply Current During
Programming
—7—mA
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated.
Operating Condit ions : 2.0V < VDD < 3.6V, -40°C < TA < +85°C (unless otherwise stated)
Param
No. Symbol Characteristic Min Typ Max Units Comments
D300 VIOFF Input Offset Voltage — 20 40 mV
D301 VICM Input Common-Mode Voltage 0 — VDD V
D302 CMRR Common-Mode Rejection
Ratio
55 — — dB
Operating Condit ions : 2.0V < VDD < 3.6V, -40°C < TA < +85°C (unless otherwise stated)
Param
No. Symbol Characteristic Min Typ Max Units Comments
VRD310 CVRES Resolution — — VDD/32 LSb
VRD311 CVRAA Absolute Accuracy — — AVDD – 1.5 LSb
VRD312 CVRUR Unit Resistor Value (R) — 2k —
PIC24FV32KA304 FAMILY
DS39995C-page 274 2011-2012 Microchip Technology Inc.
TABLE 29-15: INTERNAL VOLTAGE REGULATOR SPECIFICATIONS
Operating Condit ions : -40°C < TA < +85°C (unless otherwise stated)
Param
No. Symbol Characteristics Min Typ Max Units Comments
VBG Band Gap Reference Voltage 0.973 1.024 1.075 V
TBG Band Gap Reference Start-up
Time
—1—ms
VRGOUT Regulator Output Voltage 3.1 3.3 3.6 V
CEFC External Filter Capacitor Value 4.7 10 — F Series resistance < 3 Ohm
recommended;
< 5 Ohm is required.
VLVR Low-Voltage Regulator Output
Voltage
—2.6—V
TABLE 29-16: CTMU CURRENT SOURCE SPECIFICATIONS
DC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C T
A +85°C for Industrial
Param
No. Sym Characteristic Min Typ(1)Max Units Comments Conditions
IOUT1 CTMU Current
Source, Base Range
— 550 — nA CTMUICON<9:8> = 01
2.5V < VDD < VDDMAX
IOUT2 CTMU Current
Source, 10x Range
—5.5— A CTMUICON<9:8> = 10
IOUT3 CTMU Current
Source, 100x Range
—55—A CTMUICON<9:8> = 11
IOUT4 CTMU Current
Source, 1000x Range
— 550 — A CTMUICON<9:8> = 00
(Note 2)
VFTemperature Diode
Forward Voltage
—.76— V
VVoltage Change per
Degree Celsius
—1.6—mV/°C
Note 1: Nominal value at the center point of the current trim range (CTMUICON<7:2> = 000000). On PIC24F32KA
parts, the current output is limited to the typical current value when IOUT4 is chosen.
2: Do not use this current range with a temperature sensing diode.
2011-2012 Microchip Technology Inc. DS39995C-page 275
PIC24FV32KA304 FAMILY
29.2 AC Characteristics and Timing Parameters
The information contained in this section defines the PIC24FV32KA304 family AC characteristics and timing parameters.
TABLE 29-17: TEMPERATURE AND VOLTAGE SPECIFICATIONS – AC
FIGURE 29-3: LOAD CONDITIONS FOR DEVICE TIMING SPECIFICATIONS
TABLE 29-18: CAPACITIVE LOADING REQUIREMENTS ON OUTPUT PINS
AC CHARACTERISTICS
Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operat ing temp eratu re -40°C TA +85°C for Industrial
Operating voltage VDD range as described in Section 29.1 “DC Characteristics”.
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
DO50 COSC2 OSCO/CLKO pin — — 15 pF In XT and HS modes when the
external clock is used to drive
OSCI
DO56 CIO All I/O Pins and OSCO — — 50 pF EC mode
DO58 CBSCLx, SDAx — — 400 pF In I2C™ mode
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
VDD/2
CL
RL
Pin
Pin
VSS
VSS
CL
RL= 464
CL= 50 pF for all pins except OSCO
15 pF for OSCO output
Load Condition 1 – For All Pins Except OSCO Load Condition 2 – For OSCO
PIC24FV32KA304 FAMILY
DS39995C-page 276 2011-2012 Microchip Technology Inc.
FIGURE 29-4: EXTERNAL CLOCK TIMING
OSCI
CLKO
Q4 Q1 Q2 Q3 Q4 Q1
OS20
OS25
OS30 OS30
OS40 OS41
OS31
OS31
Q1 Q2 Q3 Q4 Q2 Q3
TABLE 29-19: EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC2 4FV32KA3 XX
Operating temperature -40°C T
A +85°C for Industrial
Param
No. Sym Characteristic Min Typ(1)Max Units Conditions
OS10 FOSC External CLKI Frequency
(External clocks allowed
only in EC mode)
DC
4
—
—
32
8
MHz
MHz
EC
ECPLL
Oscillator Frequency 0.2
4
4
31
—
—
—
—
4
25
8
33
MHz
MHz
MHz
kHz
XT
HS
XTPLL
SOSC
OS20 TOSC TOSC = 1/FOSC — — — — See Parameter OS10 for FOSC
value
OS25 TCY Instruction Cycle Time(2)62.5 — DC ns
OS30 TosL,
TosH
External Clock in (OSCI)
High or Low Time
0.45 x T
OSC ——nsEC
OS31 TosR,
TosF
External Clock in (OSCI)
Rise or Fall Time
——20nsEC
OS40 TckR CLKO Rise Time(3)—610ns
OS41 TckF CLKO Fall Time(3)—610ns
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
2: The instruction cycle period (TCY) equals two times the input oscillator time base period. All specified values
are based on characterization data for that particular oscillator type, under standard operating conditions,
with the device executing code. Exceeding these specified limits may result in an unstable oscillator
operation and/or higher than expected current consumption. All devices are tested to operate at “Min.”
values with an external clock applied to the OSCI/CLKI pin. When an external clock input is used, the “Max.”
cycle time limit is “DC” (no clock) for all devices.
3: Measurements are taken in EC mode. The CLKO signal is measured on the OSCO pin. CLKO is low for
the Q1-Q2 period (1/2 TCY) and high for the Q3-Q4 period (1/2 TCY).
2011-2012 Microchip Technology Inc. DS39995C-page 277
PIC24FV32KA304 FAMILY
TABLE 29-20: PLL CLOCK TIMING SPECIFICATIONS
AC CHARACTERISTICS
Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C TA +85°C for Industrial
Param
No. Sym Characteristic(1)Min Typ(2)Max Units Conditions
OS50 FPLLI PLL Input Frequency
Range
4 — 8 MHz ECPLL, HSPLL modes,
-40°C TA +85°C
OS51 FSYS PLL Output Frequency
Range
16 — 32 MHz -40°C TA +85°C
OS52 TLOCK PLL Start-up Time
(Lock Time)
—1 2ms
OS53 DCLK CLKO Stability (Jitter) -2 1 2 % Measured over a 100 ms
period
Note 1: These parameters are characterized but not tested in manufacturing.
2: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
TABLE 29-21: AC CHARACTERISTICS: INTERNAL RC ACCURACY
AC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3 XX
Operating temperature -40°C TA +85°C for Industrial
Param
No. Characteristic Min Typ Max Units Conditions
F20 Inter nal FRC Accuracy @ 8 MHz(1)
FRC -2 — +2 % +25°C 3.0V VDD 3.6V, F device
3.2V VDD 5.5V, FV device
-5 — +5 % -40°C TA +85°C 1.8V VDD 3.6V, F device
2.0V VDD 5.5V, FV device
LPRC @ 31 kHz(2)
F21 -15 — 15 %
Note 1: Frequency is calibrated at +25°C and 3.3V. The OSCTUN bits can be used to compensate for temperature
drift.
2: The change of LPRC frequency as VDD changes.
TABLE 29-22: INTERNAL RC OSCILLATOR SPECIFICATIONS
AC CHARACTERISTICS
Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C T
A +85°C for Industrial
-40°C TA +125°C for Extended
Param
No. Sym Characteristic(1)Min Typ Max Units Conditions
TFRC FRC Start-up Time — 5 — s
TLPRC LPRC Start-up Time — 70 — s
Note 1: These parameters are characterized but not tested in manufacturing.
PIC24FV32KA304 FAMILY
DS39995C-page 278 2011-2012 Microchip Technology Inc.
FIGURE 29-5: CLKO AND I/O TIMING CHARACTERISTICS
Note: Refer to Figure 29-3 for load conditions.
I/O Pin
(Input)
I/O Pin
(Output)
DI35
Old Value New Value
DI40
DO31
DO32
TABLE 29-23: CLKO AND I/O TIMING REQUIREMENTS
AC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C TA +85°C for Industrial
Param
No. Sym Characteristic Min Typ(1)Max Units Conditions
DO31 TIOR Port Output Rise Time — 10 25 ns
DO32 TIOF Port Output Fall Time — 10 25 ns
DI35 TINP INTx pin High or Low
Time (output)
20 — — ns
DI40 TRBP CNx High or Low Time
(input)
2——TCY
Note 1: Data in “Typ” column is at 3.3V, +25°C (PIC24F32KA3XX); 5.0V, +25°C (PIC24FV32KA3XX), unless
otherwise stated.
2011-2012 Microchip Technology Inc. DS39995C-page 279
PIC24FV32KA304 FAMILY
TABLE 29-24: COMPARATOR TIMINGS
TABLE 29-25: COMPARATOR VOLTAGE REFERENCE SETTLING TIME SPECIFICATIONS
FIGURE 29-6: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
TIMER TIMING CHARACTERISTICS
Param
No. Symbol Characteristic Min Typ Max Units Comments
300 TRESP Response Time*(1)— 150 400 ns
301 TMC2OV Comparator Mode Change to
Output Valid*—— 10s
* Parameters are characterized but not tested.
Note 1: Response time is measured with one comparator input at (VDD – 1.5)/2, while the other input transitions
from VSS to VDD.
Param
No. Symbol Characteristic Min Typ Max Units Comments
VR310 TSET Settling Time(1)——10s
Note 1: Settling time is measured while CVRSS = 1 and the CVR<3:0> bits transition from ‘0000’ to ‘1111’.
VDD
MCLR
Internal
POR
PWRT
SYSRST
System
Clock
Watchdog
Timer Reset
SY10
SY20
SY13
I/O Pins
SY13
SY35
SY11
SY12
PIC24FV32KA304 FAMILY
DS39995C-page 280 2011-2012 Microchip Technology Inc.
FIGURE 29-7: BROWN-OUT RESET CHARACTERISTICS
TABLE 29-26: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER,
AND BROWN-OUT RESET TIMING REQUIREMENTS
AC CHARACTERISTICS
St andard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C
T
A
+85°C for Industrial
Param
No. Symbol Characteristic Min. Typ(1)Max. Units Conditions
SY10 TmcL MCLR Pulse Width (low) 2 — — s
SY11 TPWRT Power-up Timer Period 50 64 90 ms
SY12 TPOR Power-on Reset Delay 1 5 10 s
SY13 TIOZ I/O High-Impedance from
MCLR Low or Watchdog
Timer Reset
— — 100 ns
SY20 TWDT Watchdog Timer Time-out
Period
0.85 1.0 1.15 ms 1.32 prescaler
3.4 4.0 4.6 ms 1:128 prescaler
SY25 TBOR Brown-out Reset Pulse
Width
1— — s
SY35 TFSCM Fail-Safe Clock Monitor
Delay
—2.0 2.3 s
SY45 TRST Internal State Reset Time — 5 — s
SY50 TVREG On-Chip Voltage Regulator
Output Delay
—10 — s(Note 2)
SY55 TLOCK PLL Start-up Time — 100 — s
SY65 TOST Oscillator Start-up Time — 1024 — TOSC
SY70 TDSWU Wake-up from Deep Sleep
Time
—100 — s Based on full discharge of
10 F capacitor on VCAP;
includes TPOR and TRST
SY71 TPM Program Memory Wake-up
Time
—1 — s Sleep wake-up with
PMSLP = 0
SY72 TLVR Low-Voltage Regulator
Wake-up Time
—250 — s
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated.
2: This applies to PIC24FV32KA3XX devices only.
DC19
Reset (Due to BOR)
VDDCORE
(Device in Brown-out Reset)
(Device not in Brown-out Reset)
TVREG + TRST
DC15
SY25
2011-2012 Microchip Technology Inc. DS39995C-page 281
PIC24FV32KA304 FAMILY
FIGURE 29-8: INPUT CAPTURE TIMINGS
TABLE 29-27: INPUT CAPTURE REQUIREMENTS
FIGURE 29-9: OUTPUT COMPARE TIMINGS
TABLE 29-28: OUTPUT CAPTURE REQUIREMENTS
Param.
No. Symbol Characteristic Min Max Units Conditions
IC10 TccL ICx Input Low Time –
Synchronous Timer
No Prescaler TCY + 20 — ns Must also meet
Parameter IC15
With Prescaler 20 — ns
IC11 TccH ICx Input Low Time –
Synchronous Timer
No Prescaler TCY + 20 — ns Must also meet
Parameter IC15
With Prescaler 20 — ns
IC15 TccP ICx Input Period – Synchronous Timer 2 * T
CY + 40
N
—nsN = prescale
value (1, 4, 16)
Param.
No. Symbol Characteristic Min Max Units Conditions
OC11 TCCR OC1 Output Rise Time — 10 ns
— —ns
OC10 TCCF OC1 Output Fall Time — 10 ns
—— ns
ICx Pin
(Input Capture Mode)
IC10 IC11
IC15
OCx
OC11 OC10
(Output Compare or PWM Mode)
PIC24FV32KA304 FAMILY
DS39995C-page 282 2011-2012 Microchip Technology Inc.
FIGURE 29-10: PWM MODULE TIMING REQUIREM ENTS
TABLE 29-29: PWM TIMING REQUIREMENTS
Param.
No. Symbol Characteristic Min Typ†Max Units Conditions
OC15 TFD Fault Input to PWM I/O
Change
— — 25 ns VDD = 3.0V, -40C to +125C
OC20 TFH Fault Input Pulse Width 50 — — ns VDD = 3.0V, -40C to +125C
† Data in “Typ” column is at 5V, +25C unless otherwise stated. These parameters are for design guidance
only and are not tested.
OCFx
PWM
OC20
OC15
2011-2012 Microchip Technology Inc. DS39995C-page 283
PIC24FV32KA304 FAMILY
FIGURE 29-11: I2C™ BUS START/STOP BITS TIMING CHARACTERISTICS (MASTER MODE)
TABLE 29-30: I2C™ BUS START/STOP BIT TIMING REQUIREMENTS (MASTER MODE)
AC CHARACTERISTICS
Standard Operating Conditions: 2.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C TA +85°C for Industrial)
-40°C TA +125°C for Extended
Param
No. Symbol Characteristic Min(1)Max Units Conditions
IM30 TSU:STA Start Condition
Setup Time
100 kHz mode TCY/2 (BRG + 1) — s Only relevant for
Repeated Start
condition
400 kHz mode T
CY/2 (BRG + 1) — s
1 MHz mode(2)TCY/2 (BRG + 1) — s
IM31 THD:STA Start Condition
Hold Time
100 kHz mode TCY/2 (BRG + 1) — s After this period, the
first clock pulse is
generated
400 kHz mode T
CY/2 (BRG + 1) — s
1 MHz mode(2)TCY/2 (BRG + 1) — s
IM33 TSU:STO Stop Condition
Setup Time
100 kHz mode TCY/2 (BRG + 1) — s
400 kHz mode TCY/2 (BRG + 1) — s
1 MHz mode(2)TCY/2 (BRG + 1) — s
IM34 THD:STO Stop Condition 100 kHz mode TCY/2 (BRG + 1) — ns
Hold Time 400 kHz mode TCY/2 (BRG + 1) — ns
1 MHz mode(2)TCY/2 (BRG + 1) — ns
Note 1: BRG is the value of the I2C™ Baud Rate Generator. Refer to Section 17.3 “Setting Baud Rate When
Operating as a Bus Master” for details.
2: Maximum pin capacitance = 10 pF for all I2C pins (for 1 MHz mode only).
SCLx
SDAx
Start
Condition
Stop
Condition
Note: Refer to Figure 29-3 for load conditions.
IM31
IM30
IM34
IM33
PIC24FV32KA304 FAMILY
DS39995C-page 284 2011-2012 Microchip Technology Inc.
FIGURE 29-12 : I2C™ BUS DATA TIMING CHARACTERISTICS (MASTER MODE)
TABLE 29-31: I2C™ BUS DATA TIMING REQUIREMENTS (MASTER MODE)
AC CHARACTERISTICS
Standard Operating Conditions: 2.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C TA +85°C for Industrial
-40°C TA +125°C for Extended
Param
No. Symbol Characteristic Min(1)Max Units Conditions
IM10 TLO:SCL Clock Low Time 100 kHz mode TCY/2 (BRG + 1) — s
400 kHz mode TCY/2 (BRG + 1) — s
1 MHz mode(2)TCY/2 (BRG + 1) — s
IM11 THI:SCL Clock High Time 100 kHz mode TCY/2 (BRG + 1) — s
400 kHz mode TCY/2 (BRG + 1) — s
1 MHz mode(2)TCY/2 (BRG + 1) — s
IM20 TF:SCL SDAx and SCLx
Fall Time
100 kHz mode — 300 ns CB is specified to be
from 10 to 400 pF
400 kHz mode 20 + 0.1 CB300 ns
1 MHz mode(2)—100ns
IM21 TR:SCL SDAx and SCLx
Rise Time
100 kHz mode — 1000 ns CB is specified to be
from 10 to 400 pF
400 kHz mode 20 + 0.1 CB300 ns
1 MHz mode(2)—300ns
IM25 TSU:DAT Data Input
Setup Time
100 kHz mode 250 — ns
400 kHz mode 100 — ns
1 MHz mode(2)TBD — ns
IM26 THD:DAT Data Input
Hold Time
100 kHz mode 0 — ns
400 kHz mode 0 0.9 s
1 MHz mode(2)TBD — ns
IM40 TAA:SCL Output Valid
From Clock
100 kHz mode — 3500 ns
400 kHz mode — 1000 ns
1 MHz mode(2)——ns
IM45 TBF:SDA Bus Free Time 100 kHz mode 4.7 — s Time the bus must be
free before a new
transmission can start
400 kHz mode 1.3 — s
1 MHz mode(2)TBD — s
IM50 CBBus Capacitive Loading — 400 pF
Legend: TBD = To Be Determined
Note 1: BRG is the value of the I2C Baud Rate Generator. Refer to Section 17.3 “Setting Baud Rate When Operating
as a B us M as ter” for details.
2: Maximum pin capacitance = 10 pF for all I2C pins (for 1 MHz mode only).
SCLx
SDAx
In
SDAx
Out
Note: Refer to Figure 29-3 for load conditions.
IM11
IM10
IM40
IM26 IM25
IM20
IM21
IM45
2011-2012 Microchip Technology Inc. DS39995C-page 285
PIC24FV32KA304 FAMILY
FIGURE 29-13 : I2C™ BUS DATA TIMING CHARACTERISTICS (SLAVE MODE)
TABLE 29-32: I2C™ BUS DATA TIMING REQUIREMENTS (SLAVE MODE)
AC CHARACTERISTICS
Standard Operating Conditions: 2.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C TA +85°C (Industrial)
-40°C T
A +125°C for Extended
Param
No. Symbol Characteristic Min Max Units Conditions
IS10 TLO:SCL Clock Low Time 100 kHz mode 4.7 — s Device must operate at a
minimum of 1.5 MHz
400 kHz mode 1.3 — s Device must operate at a
minimum of 10 MHz
1 MHz mode(1)0.5 — s
IS11 THI:SCL Clock High Time 100 kHz mode 4.0 — s Device must operate at a
minimum of 1.5 MHz
400 kHz mode 0.6 — s Device must operate at a
minimum of 10 MHz
1 MHz mode(1)0.5 — s
IS20 TF:SCL SDAx and SCLx
Fall Time
100 kHz mode — 300 ns CB is specified to be from
10 to 400 pF
400 kHz mode 20 + 0.1 CB300 ns
1 MHz mode(1)— 100 ns
IS21 TR:SCL SDAx and SCLx
Rise Time
100 kHz mode — 1000 ns CB is specified to be from
10 to 400 pF
400 kHz mode 20 + 0.1 CB300 ns
1 MHz mode(1)— 300 ns
IS25 TSU:DAT Data Input
Setup Time
100 kHz mode 250 — ns
400 kHz mode 100 — ns
1 MHz mode(1)100 — ns
IS26 THD:DAT Data Input
Hold Time
100 kHz mode 0 — ns
400 kHz mode 0 0.9 s
1 MHz mode(1)00.3s
IS40 TAA:SCL Output Valid From
Clock
100 kHz mode 0 3500 ns
400 kHz mode 0 1000 ns
1 MHz mode(1)0 350 ns
IS45 TBF:SDA Bus Free Time 100 kHz mode 4.7 — s Time the bus must be free
before a new transmission
can start
400 kHz mode 1.3 — s
1 MHz mode(1)0.5 — s
IS50 CBBus Capacitive Loading — 400 pF
Note 1: Maximum pin capacitance = 10 pF for all I2C™ pins (for 1 MHz mode only).
SCLx
SDAx
In
SDAx
Out
IS11
IS10
IS20
IS25
IS40
IS21
IS26
IS45
PIC24FV32KA304 FAMILY
DS39995C-page 286 2011-2012 Microchip Technology Inc.
FIGURE 29-14 : I2C™ BUS START/STOP BITS TIMING CHARACTERISTICS (SLAVE MODE)
TABLE 29-33: I2C™ BUS START/STOP BIT TIMING REQUIREMENTS (SLAVE MODE)
AC CHARACTERISTICS
Standard Operating Conditions: 2.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C TA +85°C (Industrial)
-40°C T
A +125°C for Extended
Param
No. Symbol Characteristic Min Max Units Conditions
IS30 T
SU:STA Start Condition
Setup Time
100 kHz mode 4.7 — s Only relevant for Repeated
Start condition
400 kHz mode 0.6 — s
1 MHz mode(1)0.25 — s
IS31 THD:STA Start Condition
Hold Time
100 kHz mode 4.0 — s After this period, the first
clock pulse is generated
400 kHz mode 0.6 — s
1 MHz mode(1)0.25 — s
IS33 TSU:STO Stop Condition
Setup Time
100 kHz mode 4.7 — s
400 kHz mode 0.6 — s
1 MHz mode(1)0.6 — s
IS34 THD:STO Stop Condition 100 kHz mode 4000 — ns
Hold Time 400 kHz mode 600 — ns
1 MHz mode(1)250 — ns
Note 1: Maximum pin capacitance = 10 pF for all I2C™ pins (for 1 MHz mode only).
SCLx
SDAx
Start
Condition
Stop
Condition
IS31
IS30
IS34
IS33
2011-2012 Microchip Technology Inc. DS39995C-page 287
PIC24FV32KA304 FAMILY
FIGURE 29-15: UARTx BAUD RATE GENERATOR OUTPUT TIMING
FIGURE 29-16: UARTx START BIT EDGE DETECTION
TABLE 29-34: UARTx TIMING REQUIREMENTS
Symbol Characteristics Min Typ Max Units
TLW UxBCLK High Time 20 TCY/2 — ns
THW UxBCLK Low Time 20 (TCY * UXBRG) + TCY/2 — ns
TBLD UxBCLK Falling Edge Delay from UxTX -50 — 50 ns
TBHD UxBCLK Rising Edge Delay from UxTX TCY/2 – 50 — TCY/2 + 50 ns
TWAK Minimum Low on UxRX Line to Cause
Wake-up
—1 —s
T
CTS Minimum Low on UxCTS Line to Start
Transmission
Tcy — — n s
T
SETUP Start bit Falling Edge to System Clock Rising
Edge Setup Time
3— —ns
T
STDELAY Maximum Delay in the Detection of the
Start bit Falling Edge
——TCY + TSETUP ns
UxBCLK
UxTX
TBLD
TBHD
UxBRG + 1 * TCY TLW THW
UxBRG
Cycle
Clock
UxRX
Any Value
TSTDELAY
TSETUP
TCY Start bit Detected, UxBRG Started
PIC24FV32KA304 FAMILY
DS39995C-page 288 2011-2012 Microchip Technology Inc.
FIGURE 29-17: SPIx MODULE MASTER MODE TIMING CHARACTERISTICS (CKE = 0)
TABLE 29-35 : SPIx MASTER MO DE TIMING REQUI REM ENTS (CKE = 0)
AC CHARACTERISTICS Standard Operating Conditions: 2.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C T
A +125°C for Extended
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
SP10 TscL SCKx Output Low Time(2)TCY/2 — — ns
SP11 TscH SCKx Output High Time(2)TCY/2 — — ns
SP20 TscF SCKx Output Fall Time(3) —1025ns
SP21 TscR SCKx Output Rise Time(3)—1025ns
SP30 TdoF SDOx Data Output Fall Time(3)—1025ns
SP31 TdoR SDOx Data Output Rise Time(3)—1025ns
SP35 TscH2doV,
TscL2doV
SDOx Data Output Valid after
SCKx Edge
— — 30 ns
SP40 TdiV2scH,
TdiV2scL
Setup Time of SDIx Data Input
to SCKx Edge
20 — — ns
SP41 TscH2diL,
TscL2diL
Hold Time of SDIx Data Input
to SCKx Edge
20 — — ns
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
2: The minimum clock period for SCKx is 100 ns; therefore, the clock generated in Master mode must not
violate this specification.
3: This assumes a 50 pF load on all SPIx pins.
SCKx
(CKP = 0)
SCKx
(CKP = 1)
SDOx
SDIx
SP11 SP10
SP40 SP41
SP21
SP20
SP35
SP20
SP21
MSb LSb
Bit 14 - - - - - -1
LSb In
Bit 14 - - - -1
SP30
SP31
MSb In
2011-2012 Microchip Technology Inc. DS39995C-page 289
PIC24FV32KA304 FAMILY
FIGURE 29-18: SPIx MODULE MAST ER MODE TIMING CHARACTERISTICS (CK E = 1)
TABLE 29-36: SP Ix MO DULE MAS TER MO DE TIMING REQUIREMENTS (CKE = 1)
AC CHARACTERISTICS
Standard Operating Conditions: 2.0V to 3.6V
(unles s otherwise stat ed)
Operating temperature -40°C TA +85°C for Industrial
-40°C T
A +125°C for Extended
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
SP10 TscL SCKx Output Low Time(2)TCY/2 — — ns
SP11 TscH SCKx Output High Time(2)TCY/2 — — ns
SP20 TscF SCKx Output Fall Time(3)—1025ns
SP21 TscR SCKx Output Rise Time(3)—1025ns
SP30 TdoF SDOx Data Output Fall Time(3)—1025ns
SP31 TdoR SDOx Data Output Rise Time(3)—1025ns
SP35 TscH2doV,
TscL2doV
SDOx Data Output Valid after
SCKx Edge
——30ns
SP36 TdoV2sc,
TdoV2scL
SDOx Data Output Setup to
First SCKx Edge
30 — — ns
SP40 TdiV2scH,
TdiV2scL
Setup Time of SDIx Data Input
to SCKx Edge
20 — — ns
SP41 TscH2diL,
TscL2diL
Hold Time of SDIx Data Input
to SCKx Edge
20 — — ns
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated. Parameters are for design guidance only
and are not tested.
2: The minimum clock period for SCKx is 100 ns; therefore, the clock generated in Master mode must not
violate this specification.
3: This assumes a 50 pF load on all SPIx pins.
SCKx
(CKP = 0)
SCKx
(CKP = 1)
SDOx
SDIx
SP36
SP30,SP31
SP35
MSb Bit 14 - - - - - -1
LSb In
Bit 14 - - - -1
LSb
SP11 SP10
SP21
SP20
SP41
MSb In
SP40
SP20
SP21
PIC24FV32KA304 FAMILY
DS39995C-page 290 2011-2012 Microchip Technology Inc.
FIGURE 29-19: SPIx MODULE SLAVE MO DE TIMING CHARACTERISTICS (C KE = 0)
TABLE 29-37: SP Ix MO DULE SL AV E MODE TIMING REQUIREMENTS (CKE = 0)
AC CHARACTERISTICS
Standard Operating Conditions: 2.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C TA +85°C for Industrial
-40°C TA +125°C for Extended
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
SP70 TscL SCKx Input Low Time 30 — — ns
SP71 TscH SCKx Input High Time 30 — — ns
SP72 TscF SCKx Input Fall Time(2)—1025ns
SP73 TscR SCKx Input Rise Time(2)—1025ns
SP30 TdoF SDOx Data Output Fall Time(2)—1025ns
SP31 TdoR SDOx Data Output Rise Time(2)—1025ns
SP35 TscH2doV,
TscL2doV
SDOx Data Output Valid after
SCKx Edge
— — 30 ns
SP40 TdiV2scH,
TdiV2scL
Setup Time of SDIx Data Input
to SCKx Edge
20 — — ns
SP41 TscH2diL,
Ts c L 2 di L
Hold Time of SDIx Data Input
to SCKx Edge
20 — — ns
SP50 TssL2scH,
TssL2scL
SSx to SCKx or SCKx Input 120 — — ns
SP51 TssH2doZ SSx to SDOx Output High-Impedance(3)10 — 50 ns
SP52 TscH2ssH
TscL2ssH
SSx after SCKx Edge 1.5 TCY + 40 — — ns
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated. Parameters are for design guidance only and are
not tested.
2: The minimum clock period for SCKx is 100 ns; therefore, the clock generated in Master mode must not violate
this specification.
3: This assumes a 50 pF load on all SPIx pins.
SSx
SCKx
(CKP = 0)
SCKx
(CKP = 1)
SDOx
SDIx
SP50
SP40
SP41
SP30,SP31 SP51
SP35
MSb LSb
Bit 14 - - - - - -1
Bit 14 - - - -1 LSb In
SP52
SP73
SP72
SP72
SP73
SP71 SP70
MSb In
2011-2012 Microchip Technology Inc. DS39995C-page 291
PIC24FV32KA304 FAMILY
FIGURE 29-20: SPIx MODULE SLAVE MO DE TIMING CHARACTERISTICS (C KE = 1)
SSx
SCKx
(CKP = 0)
SCKx
(CKP = 1)
SDOx
SP60
SDIx
SP30,SP31
MSb Bit 14 - - - - - -1 LSb
SP51
Bit 14 - - - -1 LSb In
SP35
SP52
SP52
SP73
SP72
SP72
SP73
SP71 SP70
SP40
SP41
SP50
MSb In
TABLE 29-38: SP Ix MO DULE SL AVE MO DE TIMING REQUIREMENTS (CKE = 1)
AC CHARACTERISTICS
Standard Operating C onditio ns: 2.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C TA +85°C for Industrial
-40°C TA +125°C for Extended
Param
No. Symbol Characteristic Min Typ(1)Max Units Conditions
SP70 TscL SCKx Input Low Time 30 — — ns
SP71 TscH SCKx Input High Time 30 — — ns
SP72 TscF SCKx Input Fall Time(2)—1025ns
SP73 TscR SCKx Input Rise Time(2)—1025ns
SP30 TdoF SDOx Data Output Fall Time(2)—1025ns
SP31 TdoR SDOx Data Output Rise Time(2)—1025ns
SP35 TscH2doV,
TscL2doV
SDOx Data Output Valid after SCKx Edge — — 30 ns
SP40 TdiV2scH,
TdiV2scL
Setup Time of SDIx Data Input to
SCKx Edge
20 — — ns
SP41 TscH2diL,
TscL2diL
Hold Time of SDIx Data Input to
SCKx Edge
20 — — ns
SP50 TssL2scH,
TssL2scL
SSx to SCKx or SCKx Input 120 — — ns
SP51 TssH2doZ SSx to SDOx Output High-Impedance(3)10 — 50 ns
SP52 TscH2ssH
TscL2ssH
SSx after SCKx Edge 1.5 TCY + 40 — — ns
SP60 TssL2doV SDOx Data Output Valid after SSx Edge — — 50 ns
Note 1: Data in “Typ” column is at 3.3V, +25°C unless otherwise stated. Parameters are for design guidance only and are
not tested.
2: The minimum clock period for SCKx is 100 ns; therefore, the clock generated in Master mode must not violate
this specification.
3: This assumes a 50 pF load on all SPIx pins.
PIC24FV32KA304 FAMILY
DS39995C-page 292 2011-2012 Microchip Technology Inc.
TABLE 29-39: A/D MODULE SPECIFICATIONS
AC CHARACTERISTICS Standard Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C TA +85°C for Industrial
Param
No. Symbol Characteristic Min. Typ Max. Units Conditions
Device Supply
AD01 AVDD Module VDD Supply Greater of:
VDD – 0.3 or 1.8
— Lesser of:
VDD + 0.3 or 3.6
V PIC24FXXKA30X devices
Greater of:
VDD – 0.3 or 2.0
— Lesser of:
VDD + 0.3 or 5.5
V PIC24FVXXKA30X
devices
AD02 AVSS Module VSS Supply VSS – 0.3 — VSS + 0.3 V
Reference I npu ts
AD05 VREFH Reference Voltage High AVSS + 1.7 — AVDD V
AD06 VREFL Reference Voltage Low AVSS —AVDD – 1.7 V
AD07 VREF Absolute Reference
Voltage
AVSS – 0.3 — AVDD + 0.3 V
AD08 IVREF Reference Voltage Input
Current
—1.25— mA
AD09 ZVREF Reference Input
Impedance
—10k—
Analog Input
AD10 VINH-VINL Full-Scale Input Span VREFL —VREFH V(Note 2)
AD11 VIN Absolute Input Voltage AVSS – 0.3 — AVDD + 0.3 V
AD12 VINL Absolute VINL Input
Voltage
AVSS – 0.3 — AVDD/2 V
AD17 RIN Recommended
Impedance of Analog
Voltage Source
——1k12-bit
A/D Accuracy
AD20b NRResolution — 12 — bits
AD21b INL Integral Nonlinearity — ±1 ±9 LSb VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 5V
AD22b DNL Differential Nonlinearity — ±1 ±5 LSb VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 5V
AD23b GERR Gain Error — ±1 ±9 LSb VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 5V
AD24b EOFF Offset Error — ±1 ±5 LSb VINL = AVSS = VREFL = 0V,
AVDD = VREFH = 5V
AD25b Monotonicity(1)— — — — Guaranteed
Note 1: The A/D conversion result never decreases with an increase in the input voltage.
2: Measurements are taken with external VREF+ and VREF- used as the A/D voltage reference.
2011-2012 Microchip Technology Inc. DS39995C-page 293
PIC24FV32KA304 FAMILY
FIGURE 29-21: A/D CONVERSION TIMING
TABLE 29-40: A/D CONVERSION TIMING REQUIREMENTS(1)
AC CHARACTERISTICS
St anda rd Operating Conditions: 1.8V to 3.6V PIC24F32KA3XX
2.0V to 5.5V PIC24FV32KA3XX
Operating temperature -40°C
T
A
+85°C for Industrial
Param
No. Symbol Characteristic Min. Typ Max. Units Conditions
Clock Parameters
AD50 TAD A/D Clock Period 600 — — ns TCY = 75 ns, AD1CON3 in
default state
AD51 TRC A/D Internal RC Oscillator
Period
—1.67 — µs
Conversion Rate
AD55 TCONV Conversion Time —
—
12
14
—
—
TAD
TAD
10-bit results
12-bit results
AD56 FCNV Throughput Rate — — 100 ksps
AD57 TSAMP Sample Time — 1 — TAD
AD58 TACQ Acquisition Time 750 — — ns (Note 2)
AD59 TSWC Switching Time from Convert
to Sample
——(Note 3)
AD60 TDIS Discharge Time 12 — — TAD
Clock Parameters
AD61 TPSS Sample Start Delay from
Setting Sample bit (SAMP)
2— 3 TAD
Note 1: Because the sample caps will eventually lose charge, clock rates below 10 kHz can affect linearity
performance, especially at elevated temperatures.
2: The time for the holding capacitor to acquire the “New” input voltage when the voltage changes full scale
after the conversion (VDD to VSS or VSS to VDD).
3: On the following cycle of the device clock.
AD55
AD50
AD58
BCLR AD1CON1, SAMP
Q3/Q4
A/D CLK(1)
A/D DATA
ADC1BUFn
AD1IF
SAMP
OLD DATA
SAMPLING STOPPED
NEW DATA
(Note 2)
11 10 9 2 1 0
Note 1: If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts. This allows the
SLEEP instruction to be executed.
2: This is a minimal RC delay (typically 100 ns) which also disconnects the holding capacitor from the analog input.
. . . . . .
TCY
BSET AD1CON1, SAMP
AD59
PIC24FV32KA304 FAMILY
DS39995C-page 294 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 295
PIC24FV32KA304 FAMILY
30.0 DC AND AC CHARACTERISTICS GRAPHS AND TABLES
Data for VDD levels greater than 3.3V are applicable to PIC24FV32KA304 family devices only.
FIGURE 30-1: TYPICAL AND MAXIMUM IDD VS. FOSC
(EC MODE, 2 MHz TO 32 MHz, -40°C TO +85°C)
FIGURE 30-2: TYPICAL AND MAXIMUM IDD VS. FOSC (EC MODE, 1.95 kHz TO 1 MHz, +25°C)
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore, outside the warranted range.
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
2 6 10 14 18 22 26 30
5.5V Max
5.5 V Typ
3.3V Max
3.3V Typ
2.5V Max
2.5V Typ
2.0V Max
2.0V Typ
Frequency (MHz)
IDD (mA)
50
150
250
350
450
550
0 200 400 600 800 1000
5.5V Max
5.5V Typ
3.3V Max
3.3V Typ
2.0V Max
2.0V Typ
Frequency (kHz)
IIDLE (µA)
PIC24FV32KA304 FAMILY
DS39995C-page 296 2011-2012 Microchip Technology Inc.
FIGURE 30-3: TYPICAL AND MAXIMUM IIDLE VS. FREQUENCY (EC MODE, 2 MHz TO 32 MHz)
FIGURE 30-4: TYPICAL AND MAXIMUM IIDLE VS. FREQUENCY (EC MODE, 1.95 kHz TO 1 MHz)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
2 6 10 14 18 22 26 30
5.5V Max
5.5V Typ
3.3V Max
3.3V Typ
2.5V Max
2.5V Typ
2.0V Max
2.0V Typ
Frequency (MHz )
IIDLE (mA)
40
60
80
100
120
140
160
180
0.0 0.2 0.4 0.6 0.8 1.0
5.5V Max
5.5V Typ
3.3V Max
3.3V Typ
2.0V Max
2.0V Typ
Frequency (MHz )
IIDLE (µA)
2011-2012 Microchip Technology Inc. DS39995C-page 297
PIC24FV32KA304 FAMILY
FIGURE 30-5: TYPICAL IDD VS. VDD (8 MHZ, EC MODE)
FIGURE 30-6: TYPICAL IDD VS. VDD (FRC MODE)
1.0
1.5
2.0
2.5
3.0
3.5
22.533.544.555.5
-40C
25C
60C
85C
IDD (mA)
VDD
1.5
2.0
2.5
3.0
3.5
22.533.544.555.5
-40 C
25 C
60 C
85 C
IDD (mA)
VDD
PIC24FV32KA304 FAMILY
DS39995C-page 298 2011-2012 Microchip Technology Inc.
FIGURE 30-7: TYPICAL AND MAXIMUM IDD VS. TEMPERATURE (FRC MODE)
FIGURE 30-8: TYPICAL AND MAXIMUM IIDLE VS. VDD (FRC MODE)
1.5
2.0
2.5
3.0
3.5
-40 -15 10 35 60 85
5.5V Max
5.5V Typ
3.3V Max
3.3V Typ
2.0V Max
2.0V Typ
IDD (mA)
Temperature (°C)
0.60
0.70
0.80
0.90
1.00
1.10
2 2.5 3 3.5 4 4.5 5 5.5
-40C Typ
-40C Max
25C Typ
25C Max
60C Typ
60C Max
85C Typ
85C Max
IDD (mA)
VDD
2011-2012 Microchip Technology Inc. DS39995C-page 299
PIC24FV32KA304 FAMILY
FIGURE 30-9: TYPICAL AND MAXIMUM IIDLE VS. TEMPERATURE (FRC MODE)
0.60
0.70
0.80
0.90
1.00
1.10
-40 -15 10 35 60 85
5.5V Max
5.5V Typ
3.3V Max
3.3V Typ
2.0V Max
2.0V Typ
IDD (mA)
Temperature (°C)
PIC24FV32KA304 FAMILY
DS39995C-page 300 2011-2012 Microchip Technology Inc.
FIGURE 30-10: FRC FREQUENCY ACCURACY VS. VDD
FIGURE 30-11: FRC FREQUENCY ACCURACY VS. TEMPERATURE (2.0V VDD 5.5V)
-2.5
-2
-1.5
-1
-0.5
0
0.5
22.533.544.555.5
-40 C
25 C
60 C
85 C
VDD
Frequency Error (%)
-4
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
0
0.5
-40-20 0 20406080
Frequency Error (%)
Temperature (°C)
2011-2012 Microchip Technology Inc. DS39995C-page 301
PIC24FV32KA304 FAMILY
FIGURE 30-12: LPRC FREQUENCY ACCURACY VS. VDD
FIGURE 30-13: LPRC FREQUENCY ACCURACY VS. TEMPERATURE (2.0V VDD 5.5V)
-5
-4
-3
-2
-1
0
1
22.533.544.555.5
-40 C
25 C
60 C
85 C
VDD
Frequency Error (%)
-6
-5
-4
-3
-2
-1
0
1
-40-20 0 20406080
Frequency Error (%)
Temperature (°C)
PIC24FV32KA304 FAMILY
DS39995C-page 302 2011-2012 Microchip Technology Inc.
FIGURE 30-14: TYPICAL AND MAXIMUM IPD VS. VDD
FIGURE 30-15: TYPICAL AND MAXIMUM IPD VS. TEMPERATURE
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
22.533.544.555.5
-40C Typ
-40C Max
25C Typ
25C Max
60C Typ
60C Max
85C Typ
85C Max
IPD (µA)
VDD
0.0
0.5
1.0
1.5
2.0
-40 -15 10 35 60 85
5.5V Max
5.5V Typ
3.3V Max
3.3V Typ
2.0V Max
2.0V Typ
IPD (µA)
Temperature (°C)
2011-2012 Microchip Technology Inc. DS39995C-page 303
PIC24FV32KA304 FAMILY
FIGURE 30-16: TYPICAL AND MAXIMUM IPD VS. VDD (DEEP SLEEP MODE)
FIGURE 30-17: TYPICAL AND MAXIMUM IPD VS. TE MP ER ATURE (DEEP SLEE P MODE)
0
250
500
750
1000
1250
1500
22.533.544.555.5
-40C Typ
-40C Max
25C Typ
25C Max
60C Typ
60C Max
85C Typ
85C Max
IPD (nA)
VDD
0
250
500
750
1000
1250
1500
-40 -15 10 35 60 85
5.5V Max
5.5V Typ
3.3V Max
3.3V Typ
2.0V Max
2.0V Typ
IPD (nA)
VDD
PIC24FV32KA304 FAMILY
DS39995C-page 304 2011-2012 Microchip Technology Inc.
FIGURE 30-18: TYPICAL IBOR VS. VDD
FIGURE 30-19: TYPICAL IWDT VS. VDD
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
22.533.544.555.5
-40 C
25 C
60 C
85 C
VDD
IBOR (µA)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
2 2.5 3 3.5 4 4.5 5 5.5
-40C
25C
60C
85C
IWDT (µA)
VDD
2011-2012 Microchip Technology Inc. DS39995C-page 305
PIC24FV32KA304 FAMILY
FIGURE 30-20: TYPICAL IDSBOR VS. VDD
FIGURE 30-21: TYPICAL IHLVD VS. VDD
0
5
10
15
20
25
22.533.544.555.5
-40 C
25 C
60 C
85 C
IDSBOR (nA)
VDD
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
22.533.544.555.5
-40C
25C
60C
85C
IHVLD (µA)
VDD
PIC24FV32KA304 FAMILY
DS39995C-page 306 2011-2012 Microchip Technology Inc.
FIGURE 30-22: TYPICAL IDSWDT VS. VDD
FIGURE 30-23: TYPICAL VBOR VS. TEMPERATURE (BOR TRIP POINT 3)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
22.533.544.555.5
85 C
60 C
25 C
-40 C
IDSWDT (µA)
VDD
1.80
1.82
1.84
1.86
1.88
-40-20 0 20406080
Temperature (°C)
VBOR (V)
2011-2012 Microchip Technology Inc. DS39995C-page 307
PIC24FV32KA304 FAMILY
FIGURE 30-24: TYPICAL VOH VS. IOH (GENERAL PURPOSE I/O, AS A FUNCTION OF VDD)
FIGURE 30-25: TYPICAL VOH VS. IOH (GENERAL PURPOSE I/O, AS A FUNCTION OF
TEMPERATURE, 2.0V VDD 5.5V)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
-25-20-15-10-50
5.0V
3.3V
1.8V
VOH (V)
IOH (mA)
1.0
1.5
2.0
2.5
3.0
3.5
-25-20-15-10-50
-40 C
25 C
60 C
85 C
VOH (V)
IOH (mA)
PIC24FV32KA304 FAMILY
DS39995C-page 308 2011-2012 Microchip Technology Inc.
FIGURE 30-26: TYPICAL VOL VS. IOL (GENERAL PURPOSE I/O, AS A FUNCTION OF VDD)
FIGURE 30-27 : TY P I CA L VOL VS. IOL (GENERAL PURPOSE I/O, AS A FUNCTION OF
TEMPERATURE, 2.0V VDD 5.5V)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0 5 10 15 20 25
1.8 V
2.5 V
3.3 V
5.0 V
VOL (V)
IOL (mA)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0 5 10 15 20 25
-40 C
25 C
60 C
85 C
VOL (V)
IOL (mA)
2011-2012 Microchip Technology Inc. DS39995C-page 309
PIC24FV32KA304 FAMILY
FIGURE 30-28 : VIL/VIH VS. VDD (GENERAL PURPOSE I/O, TEMPERATURES AS NOTED)
FIGURE 30-29 : VIL/VIH VS. VDD (I2C™, TEMPERATURES AS NOTED)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
1.52.02.53.03.54.04.55.0
Vih Typica l
VIL Typica l
VIH m ax -4 0
VIL Min 85C
VDD
VIL/VIH (V)
VIH Typical
VIL Typical
VIH Max -40°C
VIL Min 85°C
Indeterminate
Guaranteed Logic-High
Guarante e d Logic-Low
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VIH Max 85C
VIH Typical
VIL Typical
VIL Min 85C
VDD
VIL/VIH (V)
VIH Typical
VIL Typical
VIH Max 85°C
VIL Min 85°C
Indeterminate
Guaranteed Logic-High
Guaranteed Logic-Low
PIC24FV32KA304 FAMILY
DS39995C-page 310 2011-2012 Microchip Technology Inc.
FIGURE 30-30 : VIL/VIH VS. VDD (OSCO, TEMPERATURES AS NOTED)
FIGURE 30-31 : VIL/VIH VS. VDD (MCLR, TEMPERATURES AS NOTED)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
1.52.02.53.0 3.54.04.55.0
VIH Ma x -4 0 C
VIH Typical
VIL Typical
VIL Min 85C
VDD
VIL/VIH (V)
VIH Typical
VIL Typical
VIH Max -40°C
VIL Min 85°C
Indeterminate
Guaranteed Logic-High
Guaranteed Logic-Low
0.0
0.5
1.0
1.5
2.0
2.5
3.0
1.52.02.53.03.54.04.55.0
VIH Max -40C
VIH Typica l
VIL Typica l
VIL Min 85C
VDD
VIL/VIH (V)
VIH Typical
VIL Typical
VIH Max -40°C
VIL Min 85°C
Indeterminate
Guaranteed Logic-High
Guaranteed Logic-Low
2011-2012 Microchip Technology Inc. DS39995C-page 311
PIC24FV32KA304 FAMILY
FIGURE 30-32: TYPICAL BAND GAP VOLTAGE VS. VDD
FIGURE 30-33: TYPICAL BAND GAP VOLTAGE VS. TEMPERATURE (2.0V VDD 5.5V)
3.25
3.26
3.27
3.28
3.29
3.30
3.31
3.32
3.33
3.34
3.35
22.533.544.555.5
-40 C
25 C
60 C
85 C
VBG
VDD
1.00
1.01
1.02
1.03
1.04
-40 -15 10 35 60 85
VBG
Temperature (°C)
PIC24FV32KA304 FAMILY
DS39995C-page 312 2011-2012 Microchip Technology Inc.
FIGURE 30-34: TYPICAL VOLTAGE REGULATOR OUTPUT VS. VDD
FIGURE 30-35: TYPICAL VOLTAGE REGULATOR OUTPUT VS. TEMPERATURE
3.25
3.26
3.27
3.28
3.29
3.30
3.31
3.32
3.33
3.34
3.35
22.533.544.555.5
-40 C
25 C
60 C
85 C
VDD
Regulator Output (V)
3.25
3.26
3.27
3.28
3.29
3.30
3.31
3.32
3.33
3.34
3.35
-40 -15 10 35 60 85
2.0V
3.3V
5.5V
Temperature (°C)
Regulator Output (V)
2011-2012 Microchip Technology Inc. DS39995C-page 313
PIC24FV32KA304 FAMILY
FIGURE 30-36: HLVD TRIP POINT VOLTAGE VS. TEMPERATURE (HLVDL<3:0> = 0000,
PIC24F32KA304 FAMILY DEVICES ONLY
FIGURE 30-37: TEMPERATURE SENS OR DIODE VOLTAGE VS. TEMPERATURE
(2.0V VDD 5.5V )
1.70
1.75
1.80
1.85
1.90
-40-20 0 20406080
Avera g e
Maxi m u m
Min i m um
Temperature (°C)
Trip Point (V)
0.60
0.65
0.70
0.75
0.80
0.85
0.90
-40-20 0 20406080
Temperature (°C)
Diode Voltage (V)
PIC24FV32KA304 FAMILY
DS39995C-page 314 2011-2012 Microchip Technology Inc.
FIGURE 30-38: CTMU OUTPUT CURRENT VS. TEMPERATURE (I RNG<1:0> = 01,
2.0V VDD 5.5V)
FIGURE 30-39: CTMU OUTPUT CURRENT VS. VDD (IRNG<1:0> = 01)
0.5
0.55
0.6
0.65
0.7
-40-20 0 20406080
Current (µA)
Temperature (°C)
0.50
0.55
0.60
0.65
0.70
22.533.544.555.5
-40 C
25 C
60 C
85 C
Current (µA)
VDD
2011-2012 Microchip Technology Inc. DS39995C-page 315
PIC24FV32KA304 FAMILY
31.0 PACKAGING INFORMATION
31.1 Package Marking Information
Legend: XX...X Product-specific information
Y Year code (last digit of calendar year)
YY Year code (last 2 digits of calendar year)
WW Week code (week of January 1 is week ‘01’)
NNN Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
*This package is Pb-free. The Pb-free JEDEC designator ( )
can be found on the outer packaging for this package.
Note: In the event the full Microchip part number cannot be marked on one line, it
will be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
3
e
3
e
20-Lead PDIP (300 mil)
XXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
YYWWNNN
3
e
Example
-I/P
PIC24FV32KA301
1210017
28-Lead SPDIP (.300")
XXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
YYWWNNN
Example
-I/SP
PIC24FV32KA302
1210017
20-Lead SSOP (5.30 mm)
XXXXXXXXXXX
XXXXXXXXXXX
YYWWNNN
Example
PIC24FV32KA
301-I/SS
1210017
28-Lead SSOP (5.30 mm)
XXXXXXXXXXXX
XXXXXXXXXXXX
YYWWNNN
Example
PIC24FV32KA
302-I/SS
1210017
3
e
3
e
3
e
PIC24FV32KA304 FAMILY
DS39995C-page 316 2011-2012 Microchip Technology Inc.
PIN 1
20-Lead SOIC (7.50 mm)
XXXXXXXXXXXXXX
XXXXXXXXXXXXXX
XXXXXXXXXXXXXX
YYWWNNN
Example
PIC24FV32KA301
-I/SO
1210017
28-Lead SOIC (7.50 mm)
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXX
YYWWNNN
Example
PIC24FV32KA302
1210017
28-Lead QFN (6x6 mm)
XXXXXXXX
XXXXXXXX
YYWWNNN
3
e
3
e
-I/SO
Example
24FV32KA
302-I/ML
1210017
3
e
PIN 1
2011-2012 Microchip Technology Inc. DS39995C-page 317
PIC24FV32KA304 FAMILY
XXXXXXXXXXX
44-Lead QFN (8x8x0.9 mm)
XXXXXXXXXXX
XXXXXXXXXXX
YYWWNNN
44-Lead TQFP (10x10x1 mm)
XXXXXXXXXX
XXXXXXXXXX
XXXXXXXXXX
YYWWNNN
Example
24FV32KA
304-I/PT
1210017
3
e
3
e
PIN 1
PIC24FV32KA
Example
304-I/PT
1210017
PIN 1
XXXXXXXXXXX
44-Lead QFN (8x8x0.9 mm)
XXXXXXXXXXX
XXXXXXXXXXX
YYWWNNN
XXXXXXXX
48-Lead UQFN (6x6x0.5 mm)
XXXXXXXX
YYWWNNN
3
e
PIN 1
24FV32KA
Example
304-I/MV
1210017
PIN 1
PIC24FV32KA304 FAMILY
DS39995C-page 318 2011-2012 Microchip Technology Inc.
31.2 Package Details
The following sections give the technical details of the packages.
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2011-2012 Microchip Technology Inc. DS39995C-page 319
PIC24FV32KA304 FAMILY
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2011-2012 Microchip Technology Inc. DS39995C-page 327
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2011-2012 Microchip Technology Inc. DS39995C-page 329
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DS39995C-page 330 2011-2012 Microchip Technology Inc.
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2011-2012 Microchip Technology Inc. DS39995C-page 335
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DS39995C-page 336 2011-2012 Microchip Technology Inc.
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http://www.microchip.com/packaging
2011-2012 Microchip Technology Inc. DS39995C-page 337
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NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 339
PIC24FV32KA304 FAMILY
APPENDIX A: REVISI ON HISTORY
Revision A (March 2011)
Original data sheet for the PIC24FV32KA304 family of
devices.
Revision B (April 2011)
Section 25.0 “Charge Time Measurement Unit
(CTMU)” was revised to change the description of the
IRNGx bits in CTMUICON (Register 25-3). Setting ‘01’
is the base current level (0.55 A nominal) and setting
‘00’ is 1000x base current.
Section 29.0 “Electrical Characteristics” was revised
to change the following typical IPD specifications:
• DC20h/i/j/k from 204 A to 200 A
• DC60h/i/j/k from 0.15 A to 0.025 A
• DC60l/m/n/o from 0.25 A to 0.040 A
• DC72h/i/j/k from 0.80 A to 0.70 A
Revision C (April 2012)
Updated the Pin Diagrams on Pages 3 through 7, to
change “LVDIN” to “HLVDIN” in all occurrences, and
correct the placement of certain functions.
Updated Table 1-3 to remove references to unimple-
mented package types, corrected several erroneous
pin assignments and removed other alternate but unim-
plemented assignments.
For Section 5.0 “Flash Program Memory”, updated
Example 5-2, Example 5-3 and Example 5-4 with new
table offset functions.
Updated Figure 12-1 to correctly show the
implemented Timer1 input options.
For Section 22.0 “12-Bit A/D Converter with
Threshold Detect”:
• Updated Register 22-1 to add the MODE12 bit
• Updated the descriptions of the PVCFGx and
CSCNA bits in Register 22-2
• Updated Register 22-4 to change the VRSREQ
bit to a reserved bit position
• Modified footnote text in Register 22-5
• Corrected CHOLD in Figure 22-2
For Section 25.0 “Charge Time Measurement Unit
(CTMU)”:
• Updated the text in Section 25.1 “Measuring
Capacitance” and Section 25.3 “Pulse Genera-
tion and Delay” to better reflect the module’s
implementation
• Updated Figure 25-3 to show additional detail in
pulse generation
Added the following timing diagrams and timing
requirement tables to Section 29.0 “Electrical
Characteristics”:
•Figure 29-6 (Reset, Watchdog Timer, Oscillator
Start-up Timer and Power-up Timer Timing
Characteristics)
•Figure 29-7 (Brown-out Reset Characteristics)
•Figure 29-8 (Input Capture Timings) through
Figure 29-20 (SPIx Module Slave Mode Timing
Characteristics (CKE = 1))
•Table 29-27 (Input Capture Requirements)
through Table 29-38 (SPIx Module Slave Mode
Timing Requirements (CKE = 1))
•Figure 29-21 (A/D Conversion Timing)
Updated Table 29-5 to add specification, DC15.
Replaced Ta b l e 2 9-6, Table 29-7 and Table 29-8 with
new, shorter versions that remove unimplemented tem-
perature options. (No existing specification values
have been changed in this process.)
Updated Table 29-16 with correct values for
CTMUICON bit settings.
Combined previous Table 29-21 and Table 29-22 to
create a new Table 29-21 (AC Characteristics: Internal
RC Accuracy). All existing subsequent tables are
renumbered accordingly.
Updated Table 29-26 to add specifications, SY35 and
SY55.
Updated Table 29-39:
• Split AD01 into separate entries for “F” and “FV”
device families
• Added specifications, AD08 (IVREF) and AD09
(ZVREF)
• Changed AD17 (2.5 k max. to 1 k max.)
Updated Table 29-40:
• Changed AD50 (75 ns min. to 600 ns min.)
• Changed AD51 (250 ns typ. to 1.67 µs typ.)
• Changed AD60 (0.5 TAD min. to 2 TAD min.)
• Split AD55 into separate entries for 10-bit and
12-bit conversions
Added Section 30.0 “DC and AC Characteristics
Graphs and Tables”, with Figure 30-1 through
Figure 30-39.
Replaced some of the packaging diagrams in
Section 31.0 “Packaging Information” with the
newly revised diagrams.
Other minor typographic corrections throughout.
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DS39995C-page 340 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 341
PIC24FV32KA304 FAMILY
INDEX
A
A/D
Buffer Data Formats ................................................. 221
Control Registers ..................................................... 210
AD1CHITH/L .................................................... 210
AD1CHS .......................................................... 210
AD1CON1 ........................................................ 210
AD1CON2 ........................................................ 210
AD1CON3 ........................................................ 210
AD1CON5 ........................................................ 210
AD1CSSL/H ..................................................... 210
AD1CTMENH/L ............................................... 210
Module Specifications .............................................. 292
Result Buffers .......................................................... 210
Sampling Requirements ........................................... 219
Transfer Function ..................................................... 220
AC Characteristics
Capacitive Loading Requirements on
Output Pins ...................................................... 275
Comparator .............................................................. 279
Comparator Voltage Reference Settling Time ......... 279
Input Capture ........................................................... 281
Internal RC Accuracy ............................................... 277
Internal RC Oscillator Specifications ........................ 277
Load Conditions and Requirements ......................... 275
Output Capture ........................................................ 281
Reset, Watchdog Timer. Oscillator Start-up
Timer, Power-up Timer, Brown-out Reset
Requirements .................................................. 280
Temperature and Voltage Specifications ................. 275
Assembler
MPASM Assembler .................................................. 252
B
Baud Rate Generator
Setting as a Bus Master ........................................... 171
Block Diagrams
12-Bit A/D Converter ................................................ 208
12-Bit A/D Converter Analog Input Model ................ 219
16-Bit Asynchronous Timer3 and Timer5 ................ 143
16-Bit Synchronous Timer2 and Timer4 .................. 143
16-Bit Timer1 ........................................................... 139
Accessing Program Memory with Table
Instructions ........................................................ 54
CALL Stack Frame ..................................................... 51
Comparator Module ................................................. 225
Comparator Voltage Reference ............................... 229
CPU Programmer’s Model ......................................... 31
CRC Module ............................................................ 199
CRC Shift Engine ..................................................... 199
CTMU Connections and Internal Configuration
for Capacitance Measurement ......................... 232
CTMU Typical Connections and Internal
Configuration for Pulse Delay Generation ....... 233
CTMU Typical Connections and Internal
Configuration for Time Measurement .............. 232
Data Access from Program Space Address
Generation ......................................................... 52
Data EEPROM Addressing with TBLPAG and
NVM Registers ................................................... 65
High/Low-Voltage Detect (HLVD) ............................ 205
I2C Module ............................................................... 170
Individual Comparator Configurations ...................... 226
Input Capture x ........................................................ 147
On-Chip Regulator Connections .............................. 248
Output Compare x (16-Bit Mode) ............................ 152
Output Compare x (Double-Buffered,
16-Bit PWM Mode) .......................................... 154
PIC24F CPU Core ..................................................... 30
PIC24FV32KA304 Family (General) ......................... 15
PSV Operation ........................................................... 55
Reset System ............................................................ 69
RTCC ....................................................................... 185
Serial Resistor ......................................................... 129
Shared I/O Port Structure ........................................ 135
Simplified UARTx .................................................... 177
SPI1 Module (Enhanced Buffer Mode) .................... 163
SPI1 Module (Standard Buffer Mode) ..................... 162
System Clock ........................................................... 113
Table Register Addressing ........................................ 57
Timer2/3, Timer4/5 (32-Bit) ..................................... 142
Watchdog Timer (WDT) ........................................... 249
Brown-out Reset
Trip Points ............................................................... 266
C
C Compilers
MPLAB C18 ............................................................. 252
Charge Time Measurement Unit. See CTMU.
Code Examples
Basic Sequence for Clock Switching ....................... 120
Data EEPROM Bulk Erase ........................................ 67
Data EEPROM Unlock Sequence ............................. 63
Erasing a Program Memory Row, ‘C’ Language ....... 61
Erasing a Program Memory Row,
Assembly Language .......................................... 60
I/O Port Write/Read ................................................. 138
Initiating a Programming Sequence, ‘C’ Language ... 62
Initiating a Programming Sequence,
Assembly Language .......................................... 62
Loading the Write Buffers, ‘C’ Language ................... 62
Loading the Write Buffers, Assembly Language ....... 61
PWRSAV Instruction Syntax ................................... 123
Reading the Data EEPROM Using the
Command ......................................................... 68
Setting the RTCWREN Bit ....................................... 186
Single-Word Erase .................................................... 66
Single-Word Write to Data EEPROM ........................ 67
Ultra Low-Power Wake-up Initialization ................... 129
Unlock Sequence .................................................... 124
Code Protection ............................................................... 250
Comparator ...................................................................... 225
Comparator Voltage Reference ....................................... 229
Configuring .............................................................. 229
Configuration Bits ............................................................ 239
Core Features .................................................................... 11
CPU
ALU ............................................................................ 33
Control Registers ....................................................... 32
Core Registers ........................................................... 30
Programmer’s Model ................................................. 29
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DS39995C-page 342 2011-2012 Microchip Technology Inc.
CRC
Registers .................................................................. 201
Typical Operation ..................................................... 201
User Interface .......................................................... 200
Data ................................................................. 200
Data Shift Direction .......................................... 201
Interrupt Operation ...........................................201
Polynomial .......................................................200
CTMU
Measuring Capacitance ...........................................231
Measuring Time .......................................................232
Pulse Generation and Delay .................................... 233
Customer Change Notification Service ............................ 346
Customer Notification Service ..........................................346
Customer Support ............................................................ 346
D
Data EEPROM Memory .....................................................63
Erasing ....................................................................... 66
Operations ................................................................. 65
Programming
Bulk Erase ..........................................................67
Reading Data EEPROM .................................... 68
Single-Word Write .............................................. 67
Programming Control Registers
NVMADR(U) ...................................................... 65
NVMCON ...........................................................63
NVMKEY ............................................................ 63
Data Memory
Address Space ........................................................... 37
Memory Map .............................................................. 37
Near Data Space ....................................................... 38
Organization ............................................................... 38
SFR Space ................................................................. 38
Software Stack ...........................................................51
Space Width ............................................................... 37
DC and AC Characteristics
Graphs and Tables .................................................. 295
DC Characteristics
BOR Trip Points ....................................................... 266
Comparator Specifications ....................................... 273
Comparator Voltage Reference ............................... 273
CTMU Current Source ............................................. 274
Data EEPROM Memory ........................................... 273
High/Low-Voltage Detect ......................................... 266
I/O Pin Input Specifications ...................................... 271
I/O Pin Output Specifications ................................... 272
Idle Current (IIDLE) ...................................................268
Internal Voltage Regulator ....................................... 274
Operating Current (IDD) ............................................ 267
Power-Down Current (IPD) ....................................... 269
Program Memory .....................................................272
Temperature and Voltage Specifications ................. 265
Development Support ...................................................... 251
E
Electrical Characteristics
Absolute Maximum Ratings .....................................263
Thermal Operating Conditions ................................. 265
Thermal Packaging ..................................................265
V/F Graphs ............................................................... 264
Equations
A/D Conversion Clock Period .................................. 219
Baud Rate Reload Calculation ................................. 171
Calculating the PWM Period .................................... 155
Calculation for Maximum PWM Resolution ............. 155
Device and SPIx Clock Speed Relationship ............ 168
PWM Period and Duty Cycle Calculations ............... 155
UARTx Baud Rate with BRGH = 0 .......................... 178
UARTx Baud Rate with BRGH = 1 .......................... 178
Errata ................................................................................... 9
Examples
Baud Rate Error Calculation (BRGH = 0) ................ 178
F
Flash Program Memory
Control Registers ....................................................... 58
Enhanced ICSP Operation ........................................ 58
Programming Algorithm ............................................. 60
Programming Operations ........................................... 58
RTSP Operation ........................................................ 58
Table Instructions ...................................................... 57
H
High/Low-Voltage Detect (HLVD) .................................... 205
I
I/O Ports
Analog Port Configuration ........................................ 136
Analog Selection Registers ...................................... 136
Input Change Notification ........................................ 138
Open-Drain Configuration ........................................ 136
Parallel (PIO) ........................................................... 135
I2C
Clock Rates ............................................................. 171
Communicating as Master in Single Master
Environment .................................................... 169
Pin Remapping Options ........................................... 169
Reserved Addresses ............................................... 171
Slave Address Masking ........................................... 171
In-Circuit Debugger .......................................................... 250
In-Circuit Serial Programming (ICSP) .............................. 250
Input Capture
Cascaded (32-Bit) Mode .......................................... 148
Operations ............................................................... 148
Synchronous, Trigger Modes ................................... 147
Input Capture with Dedicated Timers .............................. 147
Instruction Set
Opcode Symbols ..................................................... 256
Overview .................................................................. 257
Summary ................................................................. 255
Internet Address .............................................................. 346
Interrupts
Alternate Interrupt Vector Table (AIVT) ..................... 75
Control and Status Registers ..................................... 78
Implemented Vectors ................................................. 77
Interrupt Vector Table (IVT) ....................................... 75
Reset Sequence ........................................................ 75
Setup Procedures .................................................... 112
Trap Vectors .............................................................. 77
Vector Table .............................................................. 76
2011-2012 Microchip Technology Inc. DS39995C-page 343
PIC24FV32KA304 FAMILY
M
Microchip Internet Web Site ............................................. 346
MPLAB ASM30 Assembler, Linker, Librarian .................. 252
MPLAB Integrated Development Environment
Software ................................................................... 251
MPLAB PM3 Device Programmer ................................... 254
MPLAB REAL ICE In-Circuit Emulator System ................ 253
MPLINK Object Linker/MPLIB Object Librarian ............... 252
N
Near Data Space ............................................................... 38
O
On-Chip Voltage Regulator .............................................. 248
Oscillator Configuration
Clock Switching ........................................................ 119
Sequence ......................................................... 119
Configuration Values for Clock Selection ................. 114
CPU Clocking Scheme ............................................ 114
Initial Configuration on POR .................................... 114
Reference Clock Output ........................................... 120
Output Compare
Cascaded (32-Bit) Mode .......................................... 151
Operations ............................................................... 153
Subcycle Resolution ................................................ 156
Synchronous, Trigger Modes ................................... 151
P
Packaging
Details ...................................................................... 318
Marking .................................................................... 315
PIC24F32KA304 Family Device Features (Summary) ....... 14
PIC24FV32KA304 Family Device Features (Summary) .... 13
Pinout Descriptions ............................................................ 16
Power-Saving ................................................................... 133
Power-Saving Features ................................................... 123
Clock Frequency, Clock Switching ........................... 123
Coincident Interrupts ................................................ 124
Instruction-Based Modes ......................................... 123
Deep Sleep ...................................................... 124
Idle ................................................................... 124
Sleep ................................................................ 123
Selective Peripheral Control .................................... 133
Ultra Low-Power Wake-up ....................................... 129
Voltage Regulator-Based ......................................... 131
Deep Sleep Mode ............................................ 131
Fast Wake-up Sleep Mode .............................. 131
Low-Voltage Sleep Mode ................................. 131
Run Mode ........................................................ 131
Sleep (Standby) Mode ..................................... 131
Product Identification System .......................................... 348
Program and Data Memory
Access Using Table Instructions ................................ 53
Addressing Space ...................................................... 51
Program Space Visibility ............................................ 55
Program and Data Memory Interfacing Spaces ................. 51
Program Memory
Address Space ........................................................... 35
Device Configuration Words ...................................... 36
Hard Memory Vectors ................................................ 36
Memory Map .............................................................. 35
Organization ............................................................... 36
Program Verification ........................................................ 250
Pulse-Width Modulation (PWM) Mode ............................. 154
Pulse-Width Modulation. See PWM.
PWM
Duty Cycle and Period ............................................. 155
R
Reader Response ............................................................ 347
Register Maps
A/D Converter ............................................................ 47
Analog Select ............................................................ 48
Clock Control ............................................................. 49
CPU Core .................................................................. 39
CRC ........................................................................... 49
CTMU ........................................................................ 48
Deep Sleep ................................................................ 49
I2Cx (I2C) ................................................................... 44
ICN ............................................................................ 40
Input Capture ............................................................. 42
Interrupt Controller ..................................................... 41
NVM ........................................................................... 50
Output Compare ........................................................ 43
Pad Configuration ...................................................... 46
PMD ........................................................................... 50
PORTA ...................................................................... 45
PORTB ...................................................................... 45
PORTC ...................................................................... 46
Real-Time Clock and Calendar (RTCC) .................... 48
SPIx ........................................................................... 45
Timer ......................................................................... 42
Triple Comparator ...................................................... 48
UARTx ....................................................................... 44
Ultra Low-Power Wake-up ......................................... 50
Registers
AD1CHITH (A/D Scan Compare Hit, High Word) .... 216
AD1CHITH (A/D Scan Compare Hit, Low Word) ..... 216
AD1CHS (A/D Sample Select) ................................ 215
AD1CON1 (A/D Control 1) ....................................... 211
AD1CON2 (A/D Control 2) ....................................... 212
AD1CON3 (A/D Control 3) ....................................... 213
AD1CON5 (A/D Control 5) ....................................... 214
AD1CSSH (A/D Input Scan Select, High Word) ...... 217
AD1CSSL (A/D Input Scan Select, Low Word) ....... 217
AD1CTMENH (CTMU Enable, High Word) ............. 218
AD1CTMENL (CTMU Enable, Low Word) ............... 218
ALCFGRPT (Alarm Configuration) .......................... 190
ALMINSEC (Alarm Minutes and Seconds Value) .... 194
ALMTHDY (Alarm Month and Day Value) ............... 193
ALWDHR (Alarm Weekday and Hours Value) ........ 193
ANSA (Analog Selection, PORTA) .......................... 136
ANSB (Analog Selection, PORTB) .......................... 137
ANSC (Analog Selection, PORTC) .......................... 137
CLKDIV (Clock Divider) ........................................... 117
CMSTAT (Comparator Status) ................................ 228
CMxCON (Comparator x Control) ........................... 227
CORCON (CPU Control) ........................................... 33
CORCON (CPU Core Control) .................................. 80
CRCCON1 (CRC Control 1) .................................... 202
CRCCON2 (CRC Control 2) .................................... 203
CRCXORH (CRC XOR Polynomial, High Byte) ...... 204
CRCXORL (CRC XOR Polynomial, Low Byte) ........ 203
CTMUCON (CTMU Control 1) ................................. 234
CTMUCON2 (CTMU Control 2) ............................... 235
PIC24FV32KA304 FAMILY
DS39995C-page 344 2011-2012 Microchip Technology Inc.
CTMUICON (CTMU Current Control) ...................... 237
CVRCON (Comparator Voltage Reference
Control) ............................................................ 230
DEVID (Device ID) ................................................... 246
DEVREV (Device Revision) ..................................... 247
DSCON (Deep Sleep Control) ................................. 127
DSWAKE (Deep Sleep Wake-up Source) ............... 128
FBS (Boot Segment Configuration) ......................... 239
FDS (Deep Sleep Configuration) ............................. 245
FGS (General Segment Configuration) .................... 240
FICD (In-Circuit Debugger Configuration) ................ 244
FOSC (Oscillator Configuration) ..............................241
FOSCSEL (Oscillator Selection Configuration) ........ 240
FPOR (Reset Configuration) .................................... 243
FWDT (Watchdog Timer Configuration) .................. 242
HLVDCON (High/Low-Voltage Detect Control) ........ 206
I2CxMSK (I2Cx Slave Mode Address Mask) ........... 176
I2CxSTAT (I2Cx Status) .......................................... 174
I2CxxCON (I2Cx Control) ........................................ 172
ICxCON1 (Input Capture x Control 1) ...................... 149
ICxCON2 (Input Capture x Control 2) ...................... 150
IEC0 (Interrupt Enable Control 0) .............................. 90
IEC1 (Interrupt Enable Control 1) .............................. 91
IEC2 (Interrupt Enable Control 2) .............................. 92
IEC3 (Interrupt Enable Control 3) .............................. 93
IEC4 (Interrupt Enable Control 4) .............................. 94
IEC5 (Interrupt Enable Control 5) .............................. 95
IFS0 (Interrupt Flag Status 0) ....................................83
IFS1 (Interrupt Flag Status 1) ....................................85
IFS2 (Interrupt Flag Status 2) ....................................86
IFS3 (Interrupt Flag Status 3) ....................................87
IFS4 (Interrupt Flag Status 4) ....................................88
IFS5 (Interrupt Flag Status 5) ....................................89
INTCON1 (Interrupt Control 1) ...................................81
INTCON2 (Interrupt Control 2) ...................................82
INTTREG (Interrupt Control and Status) .................. 111
IPC0 (Interrupt Priority Control 0) ..............................96
IPC1 (Interrupt Priority Control 1) ..............................97
IPC12 (Interrupt Priority Control 12) ........................ 106
IPC15 (Interrupt Priority Control 15) ........................ 107
IPC16 (Interrupt Priority Control 16) ........................ 108
IPC18 (Interrupt Priority Control 18) ........................ 109
IPC19 (Interrupt Priority Control 19) ........................ 109
IPC2 (Interrupt Priority Control 2) ..............................98
IPC20 (Interrupt Priority Control 20) ........................ 110
IPC3 (Interrupt Priority Control 3) ..............................99
IPC4 (Interrupt Priority Control 4) ............................ 100
IPC5 (Interrupt Priority Control 5) ............................ 101
IPC6 (Interrupt Priority Control 6) ............................ 102
IPC7 (Interrupt Priority Control 7) ............................ 103
IPC8 (Interrupt Priority Control 8) ............................ 104
IPC9 (Interrupt Priority Control 9) ............................ 105
MINSEC (RTCC Minutes and Seconds Value) ........ 192
MTHDY (RTCC Month and Day Value) ................... 191
NVMCON (Flash Memory Control) ............................59
NVMCON (Nonvolatile Memory Control) ................... 64
OCxCON1 (Output Compare x Control 1) ............... 157
OCxCON2 (Output Compare x Control 2) ............... 159
OSCCON (Oscillator Control) .................................. 115
OSCTUN (FRC Oscillator Tune) .............................. 118
PADCFG1 (Pad Configuration Control) ................... 176
RCFGCAL (RTCC Calibration and
Configuration) .................................................. 187
RCON (Reset Control) ............................................... 70
REFOCON (Reference Oscillator Control) ............... 121
RTCCSWT (Control/Sample Window Timer) ........... 195
RTCPWC (RTCC Configuration 2) .......................... 189
SPIxCON1 (SPIx Control 1) ..................................... 166
SPIxCON2 (SPIx Control 2) ..................................... 167
SPIxSTAT (SPIx Status and Control) ...................... 164
SR (ALU STATUS) .............................................. 32, 79
T1CON (Timer1 Control) ......................................... 140
TxCON (Timer2/4 Control) ....................................... 144
TyCON (Timer3/5 Control) ....................................... 145
ULPWCON (ULPWU Control) ................................. 130
UxMODE (UARTx Mode) ......................................... 180
UxRXREG (UARTx Receive) ................................... 184
UxSTA (UARTx Status and Control) ........................ 182
UxTXREG (UARTx Transmit) .................................. 184
WKDYHR (RTCC Weekday and Hours Value) ........ 192
YEAR (RTCC Year Value) ....................................... 191
Resets
Brown-out Reset (BOR) ............................................. 73
Clock Source Selection .............................................. 72
Deep Sleep BOR (DSBOR) ....................................... 73
Delay Times ............................................................... 72
Device Times ............................................................. 72
RCON Flag Operation ............................................... 71
SFR States ................................................................ 73
Revision History ............................................................... 339
RTCC ............................................................................... 185
Alarm Configuration ................................................. 196
Alarm Mask Settings (figure) ................................... 197
Calibration ............................................................... 196
Module Registers ..................................................... 186
Mapping ........................................................... 186
Clock Source Selection ........................... 186
Write Lock ........................................................ 186
Source Clock ........................................................... 185
S
Serial Peripheral Interface. See SPI.
SFR Space ........................................................................ 38
Software Simulator (MPLAB SIM) ................................... 253
Software Stack ................................................................... 51
T
Timer1 .............................................................................. 139
Timer2/3 ........................................................................... 141
Timer2/3 and Timer4/5 .................................................... 141
Timing Diagrams
A/D Conversion ........................................................ 293
Brown-out Reset Characteristics ............................. 280
CLKO and I/O Timing .............................................. 278
External Clock .......................................................... 276
I2C Bus Data (Master Mode) ................................... 284
I2C Bus Data (Slave Mode) ..................................... 285
I2C Bus Start/Stop Bits (Master Mode) .................... 283
I2C Bus Start/Stop Bits (Slave Mode) ...................... 286
Input Capture ........................................................... 281
Output Compare ...................................................... 281
PWM Requirements ................................................. 282
Reset, Watchdog Timer. Oscillator Start-up
Timer, Power-up Timer Characteristics ........... 279
SPIx Master Mode (CKE = 0) .................................. 288
SPIx Master Mode (CKE = 1) .................................. 289
SPIx Slave Mode (CKE = 0) .................................... 290
SPIx Slave Mode (CKE = 1) .................................... 291
UARTx Baud Rate Generator Output ...................... 287
UARTx Start Bit Edge Detection .............................. 287
2011-2012 Microchip Technology Inc. DS39995C-page 345
PIC24FV32KA304 FAMILY
Timing Requirements
A/D Conversion ........................................................ 293
CLKO and I/O .......................................................... 278
External Clock .......................................................... 276
I2C Bus Data (Master Mode) ............................ 283, 284
I2C Bus Data (Slave Mode) ...................................... 285
I2C Bus Start/Stop Bit (Slave Mode) ........................ 286
PLL Clock Specifications ......................................... 277
PWM ........................................................................ 282
SPIx Master Mode (CKE = 0) .................................. 288
SPIx Master Mode (CKE = 1) .................................. 289
SPIx Slave Mode (CKE = 0) .................................... 290
SPIx Slave Mode (CKE = 1) .................................... 291
UARTx ..................................................................... 287
U
UART ............................................................................... 177
Baud Rate Generator (BRG) ................................... 178
Break and Sync Transmit Sequence ....................... 179
IrDA Support ............................................................ 179
Operation of UxCTS and UxRTS Control Pins ........ 179
Receiving in 8-Bit or 9-Bit Data Mode ..................... 179
Transmitting in 8-Bit Data Mode .............................. 179
Transmitting in 9-Bit Data Mode .............................. 179
W
Watchdog Timer
Deep Sleep (DSWDT) ............................................. 250
Watchdog Timer (WDT) ................................................... 248
Windowed Operation ............................................... 249
WWW Address ................................................................ 346
WWW, On-Line Support ...................................................... 9
PIC24FV32KA304 FAMILY
DS39995C-page 346 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 347
PIC24FV32KA304 FAMILY
THE MICROCHIP WEB SITE
Microchip provides online support via our WWW site at
www.microchip.com. This web site is used as a means
to make files and information easily available to
customers. Accessible by using your favorite Internet
browser, the web site contains the following
information:
•Product Support – Data sheets and errata,
application notes and sample programs, design
resources, user’s guides and hardware support
documents, latest software releases and archived
software
•General Technical Support – Frequently Asked
Questions (FAQ), technical support requests,
online discussion groups, Microchip consultant
program member listing
•Business of Microchip – Product selector and
ordering guides, latest Microchip press releases,
listing of seminars and events, listings of
Microchip sales offices, distributors and factory
representatives
CUSTOMER CHANGE NOTIFICATION
SERVICE
Microchip’s customer notification service helps keep
customers current on Microchip products. Subscribers
will receive e-mail notification whenever there are
changes, updates, revisions or errata related to a
specified product family or development tool of interest.
To register, access the Microchip web site at
www.microchip.com. Under “Support”, click on
“Customer Change Notification” and follow the
registration instructions.
CUSTOMER SUPP ORT
Users of Microchip products can receive assistance
through several channels:
• Distributor or Representative
• Local Sales Office
• Field Application Engineer (FAE)
• Technical Support
• Development Systems Information Line
Customers should contact their distributor,
representative or field application engineer (FAE) for
support. Local sales offices are also available to help
customers. A listing of sales offices and locations is
included in the back of this document.
Technical s upport is a vail able through the web si te
at: http://microchip.com/support
PIC24FV32KA304 FAMILY
DS39995C-page 348 2011-2012 Microchip Technology Inc.
READER RESP ONSE
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip
product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our
documentation can better serve you, please FAX your comments to the Technical Publications Manager at
(480) 792-4150.
Please list the following information, and use this outline to provide us with your comments about this document.
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Telephone: (_______) _________ - _________
Application (optional):
Would you like a reply? Y N
Device: Literature Number:
Questions:
FAX: (______) _________ - _________
DS39995CPIC24FV32KA304 Family
1. What are the best features of this document?
2. How does this document meet your hardware and software development needs?
3. Do you find the organization of this document easy to follow? If not, why?
4. What additions to the document do you think would enhance the structure and subject?
5. What deletions from the document could be made without affecting the overall usefulness?
6. Is there any incorrect or misleading information (what and where)?
7. How would you improve this document?
2011-2012 Microchip Technology Inc. DS39995C-page 349
PIC24FV32KA304 FAMILY
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
Architecture 24 = 16-bit modified Harvard without DSP
Flash Memory Family F = Standard voltage range Flash program memory
FV = Wide voltage range Flash program memory
Product Group KA3 = General purpose microcontrollers
Pin Count 01 = 20-pin
02 = 28-pin
04 = 44-pin
Temperature Range I = -40C to +85C (Industrial)
Package SP = SPDIP
SO = SOIC
SS = SSOP
ML = QFN
P=PDIP
PT = TQFP
Pattern Three-digit QTP, SQTP, Code or Special Requirements
(blank otherwise)
ES = Engineering Sample
Examples:
a) PIC24FV32KA304-I/ML: Wide voltage range,
General Purpose, 32-Kbyte program memory,
44-pin, Industrial temp., QFN package
b) PIC24F16KA302-I/SS: Standard voltage range,
General Purpose, 16-Kbyte program memory,
28-pin, Industrial temp., SSOP package
Microchip T rademark
Architecture
Flash Memory Family
Program Memory Size (KB)
Product Group
Pin Coun t
Temperature Range
Package
Pattern
PIC 24 FV 32 KA3 04 T - I / PT - XXX
Tape and Reel Flag (if applicable)
PIC24FV32KA304 FAMILY
DS39995C-page 350 2011-2012 Microchip Technology Inc.
NOTES:
2011-2012 Microchip Technology Inc. DS39995C-page 351
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART,
PIC32 logo, rfPIC and UNI/O are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MXDEV, MXLAB, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip
Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, chipKIT,
chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net,
dsPICworks, dsSPEAK, ECAN, ECONOMONITOR,
FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP,
Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB,
MPLINK, mTouch, Omniscient Code Generation, PICC,
PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE,
rfLAB, Select Mode, Total Endurance, TSHARC,
UniWinDriver, WiperLock and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2011-2012, Microchip Technology Incorporated, Printed in
the U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-62076-197-7
Note the following details of the code protection feature on Microchip devices:
• Microchip products meet the specification contained in their particular Microchip Data Sheet.
• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
• Microchip is willing to work with the customer who is concerned about the integrity of their code.
• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperiph erals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
QUALITY MANAGEMENT S
YSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
DS39995C-page 352 2011-2012 Microchip Technology Inc.
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Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
Worldwide Sales and Service
11/29/11
