21-S3-C9484/C9488/F9488-092003
USER'S MANUAL
S3C9484/C9488/F9488
8-bit CMOS
Microcontroller
Revision 1
S3C9484/C9488/F9488 PRODUCT OVERVIEW
1-1
1PRODUCT OVERVIEW
S3C9-SERIES MICROCONTROLLERS
Samsung's SAM88RCRI family of 8-bit single-chip CMOS microcontrollers offers a fast and efficient CPU, a wide
range of integrated peripherals, and various mask-programmable ROM sizes.
A address/data bus architecture and a large number of bit-configurable I/O ports provide a flexible programming
environment for applications with varied memory and I/O requirements. Timer/counters with selectable operating
modes are included to support real-time operations.
S3C9484/C9488/F9488 MICROCONTROLLER
The S3C9484/C9488/F9488 single-chip CMOS microcontrollers are fabricated using the highly advanced CMOS
process technology based on Samsung’s latest CPU architecture.
The S3C9484 is a microcontroller with a 4K-byte mask-programmable ROM embedded.
The S3C9488 is a microcontroller with a 8K-byte mask-programmable ROM embedded.
The S3F9488 is a microcontroller with a 8K-byte multi time programmable ROM embedded.
Using a proven modular design approach, Samsung engineers have successfully developed the
S3C9484/C9488/F9488 by integrating the following peripheral modules with the powerful SAM88 RCRI core:
—Five configurable I/O ports (38 pins) with 8-pin LED direct drive and LCD display
—Ten interrupt sources with one vector and one interrupt level
—One watchdog timer function with two source clock (Basic Timer overflow and internal RC oscillator)
—One 8-bit basic timer for oscillation stabilization
—Watch timer for real time clock
—Two 8-bit timer/counter with time interval, PWM, and Capture mode
—Analog to digital converter with 9 input channels and 10-bit resolution
—One asynchronous UART
The S3C9484/C9488/F9488 microcontroller is ideal for use in a wide range of home applications requiring simple
timer/counter, ADC, LED or LCD display with ADC application, etc. They are currently available in 32-pin SOP/SDIP,
42-pin SDIP and 44-pin QFP package.
MTP
The S3F9488 has on-chip 8-Kbyte multi time programmable (MTP) ROM instead of masked ROM. The S3F9488 is
fully compatible to the S3C9488, in function, in D.C. electrical characteristics and in pin configuration.
PRODUCT OVERVIEW S3C9484/C9488/F9488
1-2
FEATURES
CPU
•SAM88RCRI CPU core
Memory
•208-byte general purpose register (RAM)
•4/8-Kbyte internal mask program memory
•8-Kbyte internal multi time program memory
(S3F9488)
Oscillation Sources
•Crystal, Ceramic, RC
•CPU clock divider (1/1, 1/2, 1/8, 1/16)
Instruction Set
•41 instructions
•IDLE and STOP instructions added for power-
down modes
Instruction Execution Time
•500 ns at 8-MHz fOSC (minimum)
Interrupts
•10 interrupt sources with one vector / one level
I/O Ports
•Total 38 bit-programmable pins (44QFP)
Total 36 bit-programmable pins (42SDIP)
Total 26 bit-programmable pins (32SDIP/32SOP)
Basic Timer
•One programmable 8-bit basic timer (BT) for
Oscillation stabilization control •
8bit Timers A/B
•One 8-bit timer/counter (Timer A) with three
operating modes; Interval mode, capture mode
and PWM mode.
•One 8-bit timer/counter (Timer B) Carrier
frequency (or PWM) generator.
Watch Timer
•Real-time and interval time measurement.
• Four frequency output to BUZ pin.
•Clock generation for LCD.
LCD Controller/Driver (Optional)
•8 COM × 19 SEG (MAX 19 digit)
4 COM × 19 SEG (MAX 8 digit)
A/D Converter
•Nine analog input channels
•12.5us conversion speed at 4MHz fADC clock.
Asynchronous UART
•Programmable baud rate generator
• Support serial data transmit/receive operations
with 8-bit, 9-bit UART
Watchdog Timer
•Two oscillation sources selection
(by Smart option)
• Safety work for noise interference
Low Voltage Reset (LVR)
•Low Voltage Check to make system reset
•VLVR = 2.6V/3.3V/3.9V
Voltage Detector for Indication
•Voltage Detector to indicate specific voltage.
•S/W control (2.4V, 2.7V, 3.3V, 3.9V)
Operating Temperature Range
• –25°C to + 85°C
Operating Voltage Range
•2.2V to 5.5 V at 4 MHz fOSC
• 2.7V to 5.5 V at 8 MHz fOSC
Package Type
•32-pin SDIP, 32-pin SOP
• 42-pin SDIP, 44-pin QFP
Smart Option
•Low Voltage Reset(LVR) level and enable/disable
are at your hardwired option.
• I/O Port (P0.0- P0.2/P3.3-P3.6) mode selection at
Reset.
• Watchdog Timer oscillator selection.
S3C9484/C9488/F9488 PRODUCT OVERVIEW
1-3
BLOCK DIAGRAM
I/O Port and Interrupt Control
SAM88RCRI CPU
8-Kbyte
ROM 208-Byte
RAM
OSC/RESET
8-Bit
Basic Timer
8-Bit
Timer
/Counter A
Watchdog
Timer with RC
oscillator
8-Bit
Timer
/Counter B
Watch Timer
Port 0 Port 1A/D
Port 2
LCD
Driver
UART
COM0-7
SEG0-18
P2.0-P2.7
(SEG3-10)
P4.0-P4.6
(SEG0-2,
SEG11-14)
P3.0-P3.6
(SEG15-18,
INT0-3)
X
IN
, XT
IN
X
OUT
, XT
OUT
RESET (P0.2)
TAOUT(P3.4)
TACK(P3.5)
TBPWM(P1.0)
BUZ(P1.1)
P1.0-P1.7
(ADC0-3, COM0-3)
P0.0-P0.7
(ADC4-8/COM4-7) AV
REF
Port 4
Port 3
TXD(P3.2)
RXD(P3.1)
TACAP(P3.6)
Figure 1-1. S3C9484/C9488/F9488 Block Diagram
PRODUCT OVERVIEW S3C9484/C9488/F9488
1-4
PIN ASSIGNMENT
P2.3/SEG6
P2.2/SEG5
P2.1/SEG4
P2.0/SEG3
P4.2/SEG2
P4.1/SEG1
P4.0/SEG0
P1.7/COM0
P1.6/COM1
P1.5/COM2
P1.4/COM3
SEG7/P2.4
SEG8/P2.5
SEG9/P2.6
SEG10/P2.7
SEG11/P4.3
SEG12/P4.4
SEG13/P4.5
SEG14/P4.6
SEG15/P3.0
SEG16/RXD/P3.1
SEG17/TXD/P3.2
S3C9484
S3C9488
S3F9488
(Top View)
(44-QFP)
34
35
36
37
38
39
40
41
42
43
44
33
32
31
30
29
28
27
26
25
24
23
P1.3/ADC0
P1.2/ADC1
P1.1/ADC2/BUZ
P1.0/ADC3/TBPWM
P0.7/COM4/ADC4
P0.6/COM5/ADC5
P0.5/COM6/ADC6
AVREF
P0.4/COM7/ADC7
P0.3/ADC8
P0.2/RESETB
22
21
20
19
18
17
16
15
14
13
12
SEG18/INT0/P3.3
TAOUT/INT1/P3.4
TACK/INT2/P3.5
TACAP/INT3/P3.6
VDD
XOUT
TEST
XTIN/P0.0
XTOUT/P0.1
1
2
3
4
5
6
7
8
9
10
11
VSS
XIN
Figure 1-2. S3C9484/C9488/F9488 Pin Assignment (44-QFP)
S3C9484/C9488/F9488 PRODUCT OVERVIEW
1-5
SEG12/P4.4
SEG13/P4.5
SEG14/P4.6
SEG15/P3.0
SEG16/RXD/P3.1
SEG17/TXD/P3.2
SEG18/INT0/P3.3
TAOUT/INT1/P3.4
TACK/INT2/P3.5
TACAP/INT3/P3.6
VDD
VSS
XOUT
XIN
TEST
XTIN/P0.0
XTOUT/P0.1
RESETB/P0.2
AVREF
COM6/ADC6/P0.5
COM5/ADC5/P0.6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
P4.3/SEG11
P2.7/SEG10
P2.6/SEG9
P2.5/SEG8
P2.4/SEG7
P2.3/SEG6
P2.2/SEG5
P2.1/SEG4
P2.0/SEG3
P4.2/SEG2
P4.1/SEG1
P4.0/SEG0
P1.7/COM0
P1.6/COM1
P1.5/COM2
P1.4/COM3
P1.3/ADC0
P1.2/ADC1
P1.1/ADC2/BUZ
P1.0/ADC3/TBPWM
P0.7/ADC4/COM4
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
S3C9484
S3C9488
S3F9488
(Top View)
42-SDIP
Figure 1-3. S3C9484/C9488/F9488 Pin Assignment (42-SDIP)
PRODUCT OVERVIEW S3C9484/C9488/F9488
1-6
VSS
TEST
XTIN/P0.0
XTOUT/P0.1
RESETB/P0.2
AVREF
ADC3/TBPWM/P1.0
BUZ/ADC2/P1.1
ADC1/P1.2
ADC0/P1.3
COM3/P1.4
COM2/P1.5
COM1/P1.6
COM0/P1.7
S3C9484
S3C9488
S3F9488
(Top View)
32-SOP
32-SDIP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VDD
P3.6/INT3/TACAP
P3.5/INT2/TACK
P3.4/INT1/TAOUT
P3.3/INT0/SEG18
P3.2/TXD/SEG17
P3.1/RXD/SEG16
P3.0/SEG15
P2.7/SEG10
P2.6/SEG9
P2.5/SEG8
P2.4/SEG7
P2.3/SEG6
P2.2/SEG5
P2.1/SEG4
P2.0/SEG3
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
XOUT
XIN
Figure 1-4. S3C9484/C9488/F9488 Pin Assignment (32-SOP/SDIP)
S3C9484/C9488/F9488 PRODUCT OVERVIEW
1-7
PIN DESCRIPTIONS
Table 1-1. Pin Descriptions of 44-QFP and 42-SDIP
Pin
Names Pin
Type Pin Description Circuit
Type 44 Pin
No. 42 Pin
No. Shared
Functions
P0.0, P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
I/O I/O port with bit-programmable pins.
Configurable to input or push-pull output
mode. Pull-up resistors can be assigned
by software. Pins can also be assigned
individually as alternative function pins.
E
E-1
E-2
H-16
10–14
16–18 16–18
20-22 XTIN, XTOUT
RESETB
ADC8
COM7/ADC7
COM6/ADC6
COM5/ADC5
COM4/ADC4
P1.0
P1.1–P1.3
P1.4–P1.7
I/O I/O port with bit-programmable pins.
Configurable to input or push-pull output
mode. Pull-up resistors can be assigned
by software. Pins can also be assigned
individually as alternative function pins.
E-3
E-1
H-14
19–26 23–30 ADC3/TBPWM
ADC2/BUZ
ADC1–ADC0
COM3–COM0
P2.0–P2.7 I/O I/O port with bit-programmable pins.
Configurable to input mode, push-pull
output mode. Input mode with pull-up
resistors can be assigned by software.
The port 2 pins have high current drive
capability. Pins can also be assigned
individually as alternative function pins.
H-14 30–37 34–41 SEG3–SEG10
P3.0–P3.2
P3.3
P3.4, P3.6
P3.5
I/O I/O port with bit-programmable pins.
Configurable to input or push-pull output
mode. Pull-up resistors can be assigned
by software. Pins can also be assigned
individually as alternative function pins.
H-14
H-15
H-17
D-5
D-4
42–44,
1–4 4–10 SEG15
SEG16/RXD
SEG17/TXD
SEG18/INT0
TAOUT/INT1
TACK/INT2
TACAP/INT3
P4.0–P4.6 I/O I/O port with bit-programmable pins.
Configurable to input mode, push-pull
output mode. Input mode with pull-up
resistors can be assigned by software.
Pins can also be assigned individually as
alternative function pins.
H-14 27–29
38–41 31–33
42, 1–3 SEG0–2
SEG11–14
XIN, XOUT I, O System clock input and output pins –8,7 14,13 –
TEST ITest signal input pin (for factory use only;
must be connected to VSS.) _ 9 15 _
VDD –Power supply input pin – 5 11 –
VSS –Ground pin – 6 12 –
PRODUCT OVERVIEW S3C9484/C9488/F9488
1-8
Table 1-1. Pin Descriptions of 44-QFP and 42-SDIP (Continued)
Pin
Names Pin
Type Pin Description Circuit
Type 44 Pin
No. 42 Pin
No. Shared
Functions
SEG0–18 OLCD segment display signal output pins H-14
H-15
H-17
27–44,
131–42,
1–7 P4.0–P4.2
P2.0–P2.7
P4.3–P4.6
P3.0
P3.1/RXD
P3.2/TXD
P3.3/INT0
COM0–7 OLCD common signal output pins H-14
H-16 26–23
18–16
14
30–27
20–22 P1.7–P1.4
P0.4–P0.7
ADC0–8 IA/D converter analog input channels E-1
E-3
H-16
22–20
19
18-14
13
20–26 P1.3–P1.2
P1.1/BUZ
P1.0/TBPWM
P0.7/COM4
P0.6/COM5
P0.5/COM6
P0.4/COM7
P0.3
AVREF IA/D converter reference voltage 15 19
RXD I/O Serial data RXD pin for receive input and
transmit output (mode 0) H-17 43 5 P3.1/SEG16
TXD OSerial data TXD pin for transmit output and
shift clock output (mode 0) H-17 44 6 P3.2/SEG17
INT0
INT1
INT2
INT3
IExternal interrupts. H-15
D-5
D-4
1–4 7–10 P3.3/SEG18
P3.4/TAOUT
P3.5/TACK
P3.6/TACAP
TAOUT OTimer/counter(A) overflow output, or
Timer/counter(A) PWM output D-5 2 8 P3.4/INT1
TACK ITimer/counter(A) external clock input D-4 3 9 P3.5/INT2
TACAP ITimer/counter(A) external capture input D-4 4 10 P3.6/INT3
BUZ OFrequency output to buzzer E-3 20 24 P1.1/ADC2
TBPWM OTimer(B) PWM output E-3 19 23 P1.0/ADC3
XTIN, XTOUT I
OClock input and output pins for subsystem
clock E10
11 16
17 P0.0
P0.1
RESETB ISystem reset signal input pin B12 18 P0.2
S3C9484/C9488/F9488 PRODUCT OVERVIEW
1-9
Table 1-2. Pin Descriptions of 32-SOP and 32-SDIP
Pin
Names Pin
Type Pin Description Circuit
Type 32 Pin
No. Shared
Functions
P0.0, P0.1
P0.2 I/O I/O port with bit-programmable pins.
Configurable to input or push-pull output
mode. Pull-up resistors can be assigned
by software. Pins can also be assigned
individually as alternative function pins.
E
E-2 5–7 XTIN, XTOUT
RESETB
P1.0
P1.1–P1.3
P1.4–P1.7
I/O I/O port with bit-programmable pins.
Configurable to input or push-pull output
mode. Pull-up resistors can be assigned
by software. Pins can also be assigned
individually as alternative function pins.
E-3
E-1
H-14
9–16 ADC3/TBPWM
ADC2/BUZ
ADC1–ADC0
COM3–COM0
P2.0–P2.7 I/O I/O port with bit-programmable pins.
Configurable to input mode, push-pull
output mode, or n-channel open-drain
output mode. Input mode with pull-up
resistors can be assigned by software.
The port 2 pins have high current drive
capability. Pins can also be assigned
individually as alternative function pins.
H-14 17–24 SEG3–SEG10
P3.0–P3.2
P3.3
P3.4
P3.5
P3.6
I/O I/O port with bit-programmable pins.
Configurable to input or push-pull output
mode. Pull-up resistors can be assigned
by software. Pins can also be assigned
individually as alternative function pins.
H-14
H-15
H-17
D-5
D-4
25–31 SEG15
SEG16/RXD
SEG17/TXD
SEG18/INT0
TAOUT/INT1
TACK/INT2
TACAP/INT3
XIN, XOUT I, O System clock input and output pins –2,3 –
TEST ITest signal input pin (for factory use only;
must be connected to VSS.) _ 4 _
VDD –Power supply input pin – 32 –
VSS –Ground pin – 1 –
PRODUCT OVERVIEW S3C9484/C9488/F9488
1-10
Table 1-2. Pin Descriptions of 32-SOP and 32-SDIP (Continued)
Pin
Names Pin
Type Pin Description Circuit
Type 32 Pin
No. Shared
Functions
SEG3–10
SEG15–18 OLCD segment display signal output pins H-14
H-15
H-17
17–28 P2.0–P2.7
P3.0
P3.1/RXD
P3.2/TXD
P3.3/INT0
COM0–3 OLCD common signal output pins H-14 16–13 P1.7–P1.4
ADC0–3 IA/D converter analog input channels E-1
E-3 12–9 P1.3–P1.2
P1.1/BUZ
P1.0/TBPWM
AVREF IA/D converter reference voltage 8
RXD I/O Serial data RXD pin for receive input and
transmit output (mode 0) H-17 26 P3.1/SEG16
TXD OSerial data TXD pin for transmit output and
shift clock output (mode 0) H-17 27 P3.2/SEG17
INT0
INT1
INT2
INT3
IExternal interrupts. H-15
D-5
D-4
28–31 P3.3/SEG18
P3.4/TAOUT
P3.5/TACK
P3.6/TACAP
TAOUT OTimer/counter(A) overflow output, or
Timer/counter(A) PWM output D-5 29 P3.4/INT1
TACK ITimer/counter(A) external clock input D-4 30 P3.5/INT2
TACAP ITimer/counter(A) external capture input D-4 31 P3.5/INT3
BUZ OFrequency output to buzzer E-3 10 P1.1/ADC2
TBPWM OTimer(B) PWM output E-3 9P1.0/ADC3
XTIN, XTOUT I
OClock input and output pins for subsystem
clock E5
6P0.0
P0.1
RESETB ISystem reset signal input pin B7P0.2
S3C9484/C9488/F9488 PRODUCT OVERVIEW
1-11
PIN CIRCUITS
IN
Figure 1-5. Pin Circuit Type B (RESET)
P-Channel
N-Channel
V
DD
Out
Output
Disable
Data
Figure 1-6. Pin Circuit Type C
I/O
Output
Disable
Data Pin Circuit
Type C
Pull-up
Enable
V
DD
Figure 1-7. Pin Circuit Type D-2
I/O
Output
Disable
Data Pin Circuit
Type C
Pull-up
Enable
V
DD
Noise
Filter
Ext.INT
Input
Normal
V
DD
Figure 1-8. Pin Circuit Type D-4 (P3.5-P3.6)
PRODUCT OVERVIEW S3C9484/C9488/F9488
1-12
I/O
Output
Disable
P3.x Data
Pin
Circuit
Type C
Pull-up
enable
VDD
Noise
Filter
Ext.INT
Normal Input
VDD
M
U
X
Alternative output
(TAOUT)
Figure 1-9. Pin Circuit Type D-5 (P3.4)
V
DD
I/O
Digital Input
P-CH
V
DD
Pull-up
enable
Output Disable
(Input Mode) N-CH
Alternative I/O Enable
Output Data
XTin,XTout
oscillation circuit
MUX
Smart option
Figure 1-10. Pin Circuit Type E (P0.0, P0.1)
S3C9484/C9488/F9488 PRODUCT OVERVIEW
1-13
Pull-up
Enable
I/O
Output
Disable
V
DD
Circuit
Type C
Data
ADC In EN
to ADC
Data
Figure 1-11. Pin Circuit Type E-1 (P0.3, P1.2–P1.3)
V
DD
In/Out
Output DIsable
(input mode)
Data
V
DD
Pull-up register
(50 k
Ω
typical)
Input Data
Pull-up
enable Open-drain
MUX
RESET
MUX
Smart option
Figure 1-12. Pin Circuit Type E-2 (P0.2)
PRODUCT OVERVIEW S3C9484/C9488/F9488
1-14
Pull-up
Enable
I/O
Output
Disable
V
DD
Circuit
Type C
Data
ADC In EN
to ADC
M
U
X
Buzzer Output
TB Underflow
Carrier on/off (P1.0)
Port Alternative option
P1.0 -P1.1 Data
Figure 1-13. Pin Circuit Type E-3 (P1.0- P1.1)
S3C9484/C9488/F9488 PRODUCT OVERVIEW
1-15
Out
V
LC3
SEG/COM
V
LC2
V
LC4
V
LC1
Figure 1-14. Pin Circuit Type H (SEG/COM)
PRODUCT OVERVIEW S3C9484/C9488/F9488
1-16
Out
SEG
V
LC4
V
LC3
V
LC2
Output
Disable
V
LC1
Figure 1-15. Pin Circuit Type H-4
Pull-up
Enable
P-CH
N-CH
V
DD
I/O
Output
Disable
Data
V
DD
Circuit
Type H
Open Drain EN
LCD Out EN
SEG/COM
Input
Figure 1-16. Pin Circuit Type H-14 (P1.4-P1.7, P2, P3.0, P4.0-P4.6)
S3C9484/C9488/F9488 PRODUCT OVERVIEW
1-17
Pull-up
Enable
P-CH
N-CH
V
DD
I/O
Output Disable
Data
V
DD
Circuit
Type H-4
Open Drain EN
LCD Out EN
SEG
Noise
Filter
Ext.INT
Normal Input
Figure 1-17. Pin Circuit Type H-15 (P3.3)
Pull-up
Enable
P-CH
N-CH
V
DD
I/O
Output
Disable
Data
V
DD
Circuit
Type H-4
Open Drain EN
LCD Out EN
COM
ADC In EN
Normal In
ADC In
Figure 1-18. Pin Circuit Type H-16 (P0.4–P0.7)
PRODUCT OVERVIEW S3C9484/C9488/F9488
1-18
Pull-up
Enable
P-CH
N-CH
V
DD
I/O
Output Disable
Data
V
DD
Circuit
Type H-4
Open Drain EN
LCD Out EN
SEG
Normal Input
Figure 1-19. Pin Circuit Type H-17 (P3.1-P3.2)
S3C9484/C9488/F9488 ADDRESS SPACES
2-1
2ADDRESS SPACES
OVERVIEW
The S3C9484/C9488/F9488 microcontroller has two kinds of address space:
—Internal program memory (ROM)
—Internal register file
A 13-bit address bus supports program memory operations. A separate 8-bit register bus carries addresses and
data between the CPU and the internal register file.
The S3F9488 have 8-Kbytes of on-chip program memory, which is configured as the Internal ROM mode, all of the 8-
Kbyte internal program memory is used.
The S3C9484/C9488/F9488 microcontroller has 208 general-purpose registers in its internal register file. 47 bytes in
the register file are mapped for system and peripheral control functions. And 19 bytes in the page1 is mapped for
LCD display data area.
ADDRESS SPACES S3C9484/C9488/F9488
2-2
PROGRAM MEMORY (ROM)
Program memory (ROM) stores program codes or table data. The S3C9484/C9488 has 4K and 8Kbytes of internal
mask programmable program memory. The program memory address range is therefore 0H–0FFFH and 0H-1FFFH.
The S3F9488 have 8Kbytes (locations 0H–1FFFH) of internal multi time programmable (MTP) program memory (see
Figure 2-1).
The first 2-bytes of the ROM (0000H–0001H) are interrupt vector address.
Unused locations (0002H–00FFH except 3CH, 3DH, 3EH, 3FH) can be used as normal program memory.
The location 3CH, 3DH, 3EH, and 3FH is used as smart option ROM cell.
The program reset address in the ROM is 0100H.
8,191 1FFFH
(S3C9488/F9488)
0100H
8Kbyte
Program
Memory
Area
Interrupt Vector Area
003FH
003CH
0000H
(Decimal) (HEX)
Program Start
0002H
0
Smart option ROM cell
4Kbyte
Program
Memory
Area
4,095 0FFFH
(S3C9484)
1000H
0200H
Figure 2-1. Program Memory Address Space
S3C9484/C9488/F9488 ADDRESS SPACES
2-3
Smart Option
Smart option is the ROM option for starting condition of the chip. The ROM addresses used by smart option are from
003CH to 003FH. The default value of ROM is FFH.
NOTES:
1. The smart option value of 3DH determine P3.3-P3.6 initial port mode when cpu is reset.
The value of smart option is the same as normal setting value. You can refer to user manual chapter "9. I/O PORT".
2. The unused bits of 3CH, 3EH, 3FH must be logic "1".
3. When LVR is enabled, LVR level must be set to appropriate value, not default value.
4. You must determine P0.0-P0.2 function on smart option.
In other words, After reset operation, you cann't change P0.0-P0.2 function.
For a example, if you select xtin(P0.0)/xtout(P0.1) function by smart option, you cann't change on Normal I/O after
reset operation. Equally, RESETB(P0.2) pin function is the same.
ROM Address: 003DH
.7 .6 .5 .4 .3 .2 .1 .0MSB LSB
P3CONH.7 -.0
The reset value of P3CONH (Port 3 Control Register High byte)
register is determined by 3DH.7-3DH.0 bits when CPU is reset.
ROM Address: 003EH
.7 .6 .5 .4 .3 .2 .1 .0MSB LSB
LVR enable
or disable bit:
0 = Disable
1 = Enable
LVR level selection bits:
10100 = 2.6 V
01110 = 3.3 V
01011 = 3.9 V
Not used
ROM Address: 003FH
.7 .6 .5 .4 .3 .2 .1 .0MSB LSB
Not used Watchdog timer
oscillator select bit:
0 = Internal RC
oscillator used
1 = Basic Timer
overflow used
P0.0/XTin, P0.1/XTout
pin function selection bit:
0 = XTin/Xtout pin enable
1 = Normal I/O pin enable
ROM Address: 003CH
.7 .6 .5 .4 .3 .2 .1 .0MSB LSB
Not used
P0.2/RESETB pin
selection bit:
0 = Nomal I/O P0.2
pin enable
1 = RESETB
Pin enable
Figure 2-2. Smart Option
ADDRESS SPACES S3C9484/C9488/F9488
2-4
REGISTER ARCHITECTURE
The upper 64-bytes of the S3C9484/C9488/F9488's internal register file are addressed as working registers, system
control registers and peripheral control registers. The lower 192-bytes of internal register file (00H–BFH) is called the
general-purpose register space. 274 registers in this space can be accessed; 208 are available for general-purpose
use. And 19 are available for LCD display register. But if LCD driver not used, available for general-purpose use.
For many SAM88RCRI microcontrollers, the addressable area of the internal register file is further expanded by
additional register pages at space of the general purpose register (00H–BFH). This register file expansion is not
implemented in the S3C9484/C9488/F9488, however.
The specific register types and the area (in bytes) that they occupy in the internal register file are summarized in
Table 2-1.
Table 2-1. Register Type Summary
Register Type Number of Bytes
System and peripheral registers (page0 & page1) 47
General-purpose registers (including the 16-bit
common working register area) 208
LCD display Registers (page1) 19
Total Addressable Bytes 274
S3C9484/C9488/F9488 ADDRESS SPACES
2-5
FFH
C0H
~
BFH
00H
D0H
CFH
E0H
DFH
Working Registers
System Control
Registers
Peripheral Control
Registers
General Purpose
Register File
and Stack Area
22 Bytes
Page 0
00H
15H
LCD Display Registers
&
Peripheral Register
Page 1
192 Bytes
64 Bytes of
Common Area
Figure 2-3. Internal Register File Organization
ADDRESS SPACES S3C9484/C9488/F9488
2-6
COMMON WORKING REGISTER AREA (C0H–CFH)
The SAM88RCRI register architecture provides an efficient method of working register addressing that takes full
advantage of shorter instruction formats to reduce execution time.
This 16-byte address range is called common area. That is, locations in this area can be used as working registers
by operations that address any location on any page in the register file.
Registers are addressed either as a single 8-bit register or as a paired 16-bit register. In 16-bit register pairs, the
address of the first 8-bit register is always an even number and the address of the next register is an odd number.
The most significant byte of the 16-bit data is always stored in the even-numbered register; the least significant byte
is always stored in the next (+ 1) odd-numbered register.
MSB
Rn
LSB
Rn+1
n = Even address
Figure 2-4. 16-Bit Register Pairs
S3C9484/C9488/F9488 ADDRESS SPACES
2-7
SYSTEM STACK
S3F9-series microcontrollers use the system stack for subroutine calls and returns and to store data. The PUSH
and POP instructions are used to control system stack operations. The S3C9484/C9488/F9488 architecture
supports stack operations in the internal register file.
Stack Operations
Return addresses for procedure calls and interrupts and data are stored on the stack. The contents of the PC are
saved to stack by a CALL instruction and restored by the RET instruction. When an interrupt occurs, the contents of
the PC and the FLAGS registers are pushed to the stack. The IRET instruction then pops these values back to their
original locations. The stack address always decrements before a push operation and increments after a pop
operation. The stack pointer (SP) always points to the stack frame stored on the top of the stack, as shown in
Figure 2-5.
Stack contents
after a call
instruction
Stack contents
after an
interrupt
Top of
stack Flags
PCH
PCL
PCL
PCH
Top of
stack
Low Address
High Address
Figure 2-5. Stack Operations
Stack Pointer (SP)
Register location D9H contains the 8-bit stack pointer (SP) that is used for system stack operations. After a reset,
the SP value is undetermined.
Because only internal memory space is implemented in the S3C9484/C9488/F9488, the SP must be initialized to an
8-bit value in the range 00H–0C0H.
NOTE
In case a Stack Pointer is initialized to 00H, it is decreased to FFH when stack operation starts. This
means that a Stack Pointer access invalid stack area. We recommend that a stack pointer is initialized to
C0H to set upper address of stack to BFH.
ADDRESS SPACES S3C9484/C9488/F9488
2-8
+ PROGRAMMING TIP — Standard Stack Operations Using PUSH and POP
The following example shows you how to perform stack operations in the internal register file using PUSH and POP
instructions:
LD SP,#0C0H ;SP ← C0H (Normally, the SP is set to C0H by the
; initialization routine)
•
•
•
PUSH SYM ;Stack address 0BFH ← SYM
PUSH R15 ;Stack address 0BEH ← R15
PUSH 20H ;Stack address 0BDH ← 20H
PUSH R3 ;Stack address 0BCH ← R3
•
•
•
POP R3 ;R3 ← Stack address 0BCH
POP 20H ;20H ← Stack address 0BDH
POP R15 ;R15 ← Stack address 0BEH
POP SYM ;SYM ← Stack address 0BFH
S3C9484/C9488/F9488 ADDRESSING MODES
3-1
3ADDRESSING MODES
OVERVIEW
Instructions that are stored in program memory are fetched for execution using the program counter. Instructions
indicate the operation to be performed and the data to be operated on. Addressing mode is the method used to
determine the location of the data operand. The operands specified in SAM88RC instructions may be condition
codes, immediate data, or a location in the register file, program memory, or data memory.
The S3C-series instruction set supports seven explicit addressing modes. Not all of these addressing modes are
available for each instruction. The seven addressing modes and their symbols are:
—Register (R)
—Indirect Register (IR)
—Indexed (X)
—Direct Address (DA)
—Indirect Address (IA)
—Relative Address (RA)
—Immediate (IM)
ADDRESSING MODES S3C9484/C9488/F9488
3-2
REGISTER ADDRESSING MODE (R)
In Register addressing mode (R), the operand value is the content of a specified register or register pair
(see Figure 3-1).
Working register addressing differs from Register addressing in that it uses a register pointer to specify an 8-byte
working register space in the register file and an 8-bit register within that space (see Figure 3-2).
dst
Value used in
Instruction Execution
OPCODE OPERAND
8-bit Register
File Address Point to One
Register in Register
File
One-Operand
Instruction
(Example)
Sample Instruction:
DEC CNTR ; Where CNTR is the label of an 8-bit register address
Program Memory Register File
Figure 3-1. Register Addressing
dst
OPCODE
4-bit
Working Register Point to the
Working Register
(1 of 8)
Two-Operand
Instruction
(Example)
Sample Instruction:
ADD R1, R2 ; Where R1 and R2 are registers in the currently
selected working register area.
Program Memory
Register File
src 3 LSBs
RP0 or RP1
Selected
RP points
to start
of working
register
block
OPERAND
MSB Point to
RP0 ot RP1
Figure 3-2. Working Register Addressing
S3C9484/C9488/F9488 ADDRESSING MODES
3-3
INDIRECT REGISTER ADDRESSING MODE (IR)
In Indirect Register (IR) addressing mode, the content of the specified register or register pair is the address of the
operand. Depending on the instruction used, the actual address may point to a register in the register file, to program
memory (ROM), or to an external memory space (see Figures 3-3 through 3-6).
You can use any 8-bit register to indirectly address another register. Any 16-bit register pair can be used to indirectly
address another memory location.
dst
Address of Operand
used by Instruction
OPCODE ADDRESS
8-bit Register
File Address Point to One
Register in Register
File
One-Operand
Instruction
(Example)
Sample Instruction:
RL @SHIFT ; Where SHIFT is the label of an 8-bit register address
Program Memory Register File
Value used in
Instruction Execution OPERAND
Figure 3-3. Indirect Register Addressing to Register File
ADDRESSING MODES S3C9484/C9488/F9488
3-4
INDIRECT REGISTER ADDRESSING MODE (Continued)
dst
OPCODE PAIR
Points to
Register Pair
Example
Instruction
References
Program
Memory
Sample Instructions:
CALL @RR2
JP @RR2
Program Memory
Register File
Value used in
Instruction OPERAND
REGISTER
Program Memory
16-Bit
Address
Points to
Program
Memory
Figure 3-4. Indirect Register Addressing to Program Memory
S3C9484/C9488/F9488 ADDRESSING MODES
3-5
INDIRECT REGISTER ADDRESSING MODE (Continued)
dst
OPCODE ADDRESS
4-bit
Working
Register
Address Point to the
Working Register
(1 of 8)
Sample Instruction:
OR R3, @R6
Program Memory
Register File
src 3 LSBs
Value used in
Instruction OPERAND
Selected
RP points
to start fo
working register
block
RP0 or RP1
MSB Points to
RP0 or RP1
~ ~
~ ~
Figure 3-5. Indirect Working Register Addressing to Register File
ADDRESSING MODES S3C9484/C9488/F9488
3-6
INDIRECT REGISTER ADDRESSING MODE (Concluded)
dst
OPCODE
4-bit Working
Register Address
Sample Instructions:
LCD R5,@RR6 ; Program memory access
LDE R3,@RR14 ; External data memory access
LDE @RR4, R8 ; External data memory access
Program Memory
Register File
src
Value used in
Instruction OPERAND
Example Instruction
References either
Program Memory or
Data Memory Program Memory
or
Data Memory
Next 2-bit Point
to Working
Register Pair
(1 of 4)
LSB Selects
Register
Pair
16-Bit
address
points to
program
memory
or data
memory
RP0 or RP1
MSB Points to
RP0 or RP1
Selected
RP points
to start of
working
register
block
Figure 3-6. Indirect Working Register Addressing to Program or Data Memory
S3C9484/C9488/F9488 ADDRESSING MODES
3-7
INDEXED ADDRESSING MODE (X)
Indexed (X) addressing mode adds an offset value to a base address during instruction execution in order to calculate
the effective operand address (see Figure 3-7). You can use Indexed addressing mode to access locations in the
internal register file or in external memory.
In short offset Indexed addressing mode, the 8-bit displacement is treated as a signed integer in the range –128 to
+127. This applies to external memory accesses only (see Figure 3-8.)
For register file addressing, an 8-bit base address provided by the instruction is added to an 8-bit offset contained in
a working register. For external memory accesses, the base address is stored in the working register pair
designated in the instruction. The 8-bit or 16-bit offset given in the instruction is then added to that base address (see
Figure 3-9).
The only instruction that supports Indexed addressing mode for the internal register file is the Load instruction (LD).
The LDC and LDE instructions support Indexed addressing mode for internal program memory and for external data
memory, when implemented.
dst/src
OPCODE
Two-Operand
Instruction
Example Point to One of the
Woking Register
(1 of 8)
Sample Instruction:
LD R0, #BASE[R1] ; Where BASE is an 8-bit immediate value
Program Memory
Register File
x3 LSBs
Value used in
Instruction OPERAND
INDEX
Base Address
RP0 or RP1
Selected RP
points to
start of
working
register
block
~ ~
~ ~
+
Figure 3-7. Indexed Addressing to Register File
ADDRESSING MODES S3C9484/C9488/F9488
3-8
INDEXED ADDRESSING MODE (Continued)
Register File
OPERAND
Program Memory
or
Data Memory
Point to Working
Register Pair
(1 of 4)
LSB Selects
16-Bit
address
added to
offset
RP0 or RP1
MSB Points to
RP0 or RP1
Selected
RP points
to start of
working
register
block
dst/src
OPCODE
Program Memory
x
OFFSET
4-bit Working
Register Address
Sample Instructions:
LDC R4, #04H[RR2] ; The values in the program address (RR2 + 04H)
are loaded into register R4.
LDE R4,#04H[RR2] ; Identical operation to LDC example, except that
external program memory is accessed.
NEXT 2 Bits Register
Pair
Value used in
Instruction
8-Bits 16-Bits
16-Bits
+
~ ~
Figure 3-8. Indexed Addressing to Program or Data Memory with Short Offset
S3C9484/C9488/F9488 ADDRESSING MODES
3-9
INDEXED ADDRESSING MODE (Concluded)
Register File
OPERAND
Program Memory
or
Data Memory
Point to Working
Register Pair
LSB Selects
16-Bit
address
added to
offset
RP0 or RP1
MSB Points to
RP0 or RP1
Selected
RP points
to start of
working
register
block
Sample Instructions:
LDC R4, #1000H[RR2] ; The values in the program address (RR2 + 1000H)
are loaded into register R4.
LDE R4,#1000H[RR2] ; Identical operation to LDC example, except that
external program memory is accessed.
NEXT 2 Bits Register
Pair
Value used in
Instruction
8-Bits 16-Bits
16-Bits
dst/src
OPCODE
Program Memory
src
OFFSET
4-bit Working
Register Address
OFFSET
+
~ ~
Figure 3-9. Indexed Addressing to Program or Data Memory
ADDRESSING MODES S3C9484/C9488/F9488
3-10
DIRECT ADDRESS MODE (DA)
In Direct Address (DA) mode, the instruction provides the operand's 16-bit memory address. Jump (JP) and Call
(CALL) instructions use this addressing mode to specify the 16-bit destination address that is loaded into the PC
whenever a JP or CALL instruction is executed.
The LDC and LDE instructions can use Direct Address mode to specify the source or destination address for Load
operations to program memory (LDC) or to external data memory (LDE), if implemented.
Sample Instructions:
LDC R5,1234H ; The values in the program address (1234H)
are loaded into register R5.
LDE R5,1234H ; Identical operation to LDC example, except that
external program memory is accessed.
dst/src
OPCODE
Program Memory
"0" or "1"
Lower Address Byte
LSB Selects Program
Memory or Data Memory:
"0" = Program Memory
"1" = Data Memory
Memory
Address
Used
Upper Address Byte
Program or
Data Memory
Figure 3-10. Direct Addressing for Load Instructions
S3C9484/C9488/F9488 ADDRESSING MODES
3-11
DIRECT ADDRESS MODE (Continued)
OPCODE
Program Memory
Lower Address Byte
Memory
Address
Used
Upper Address Byte
Sample Instructions:
JP C,JOB1 ; Where JOB1 is a 16-bit immediate address
CALL DISPLAY ; Where DISPLAY is a 16-bit immediate address
Next OPCODE
Figure 3-11. Direct Addressing for Call and Jump Instructions
ADDRESSING MODES S3C9484/C9488/F9488
3-12
INDIRECT ADDRESS MODE (IA)
In Indirect Address (IA) mode, the instruction specifies an address located in the lowest 256 bytes of the program
memory. The selected pair of memory locations contains the actual address of the next instruction to be executed.
Only the CALL instruction can use the Indirect Address mode.
Because the Indirect Address mode assumes that the operand is located in the lowest 256 bytes of program
memory, only an 8-bit address is supplied in the instruction; the upper bytes of the destination address are assumed
to be all zeros.
Current
Instruction
Program Memory
Locations 0-255
Program Memory
OPCODE
dst
Lower Address Byte
Upper Address Byte
Next Instruction
LSB Must be Zero
Sample Instruction:
CALL #40H ; The 16-bit value in program memory addresses 40H
and 41H is the subroutine start address.
Figure 3-12. Indirect Addressing
S3C9484/C9488/F9488 ADDRESSING MODES
3-13
RELATIVE ADDRESS MODE (RA)
In Relative Address (RA) mode, a twos-complement signed displacement between – 128 and + 127 is specified in
the instruction. The displacement value is then added to the current PC value. The result is the address of the next
instruction to be executed. Before this addition occurs, the PC contains the address of the instruction immediately
following the current instruction.
The instructions that support RA addressing is JR.
OPCODE
Program Memory
Displacement
Program Memory
Address Used
Sample Instructions:
JR ULT,$+OFFSET ; Where OFFSET is a value in the range +127 to -128
Next OPCODE
+
Signed
Displacement Value
Current Instruction
Current
PC Value
Figure 3-13. Relative Addressing
ADDRESSING MODES S3C9484/C9488/F9488
3-14
IMMEDIATE MODE (IM)
In Immediate (IM) addressing mode, the operand value used in the instruction is the value supplied in the operand
field itself. Immediate addressing mode is useful for loading constant values into registers.
(The Operand value is in the instruction)
OPCODE
Sample Instruction:
LD R0,#0AAH
Program Memory
OPERAND
Figure 3-14. Immediate Addressing
S3C9484/C9488/F9488 CONTROL REGISTER
4-1
4CONTROL REGISTERS
OVERVIEW
Control register descriptions are arranged in alphabetical order according to register mnemonic. More detailed
information about control registers is presented in the context of the specific peripheral hardware descriptions in Part
II of this manual.
The locations and read/write characteristics of all mapped registers in the S3C9484/C9488/F9488 register file are
listed in Table 4-1. The hardware reset value for each mapped register is described in Chapter 8, “RESET and Power-
Down."
Table 4-1. System and Peripheral Registers
Register Name Mnemonic Decimal Hex R/W
LCD control register LCDCON 208 D0H R/W
LCD drive voltage control register LCDVOL 209 D1H R/W
Port 0 pull-up resistor control register P0PUR 210 D2H R/W
Port 1 pull-up resistor control register P1PUR 211 D3H R/W
System Clock control register CLKCON 212 D4H R/W
System flags register FLAGS 213 D5H R/W
Oscillator control register OSCCON 214 D6H R/W
STOP control register STPCON 215 D7H R/W
Voltage Level Detector control register VLDCON 216 D8H R/W
Stack pointer register SP 217 D9H R/W
Location DAH - DBH are not mapped
Basic timer control register BTCON 220 DCH R/W
Basic timer counter register BTCNT 221 DDH R
Location DEH is not mapped
System mode register SYM 223 DFH R/W
CONTROL REGISTERS S3C9484/C9488/F9488
4-2
Table 4-1. System and Peripheral Registers (continued)
Register Name Mnemonic Decimal Hex R/W
Port 0 Data Register P0 224 E0H R/W
Port 1 Data Register P1 225 E1H R/W
Port 2 Data Register P2 226 E2H R/W
Port 3 Data Register P3 227 E3H R/W
Port 4 Data Register P4 228 E4H R/W
Watchdog timer control register WDTCON 229 E5H R/W
Port 0 control High register P0CONH 230 E6H R/W
Port 0 control Low register P0CONL 231 E7H R/W
Port 1 control High register P1CONH 232 E8H R/W
Port 1 control Low register P1CONL 233 E9H R/W
Port 2 control High register P2CONH 234 EAH R/W
Port 2 control Low register P2CONL 235 EBH R/W
Port 3 control High register P3CONH 236 ECH R/W
Port 3 control Low register P3CONL 237 EDH R/W
Port 3 interrupt control register P3INT 238 EEH R/W
Port 3 interrupt pending register P3PND 239 EFH R/W
Port 4 control High register P4CONH 240 F0H R/W
Port 4 control Low register P4CONL 241 F1H R/W
Timer A/Timer B interrupt pending register TINTPND 242 F2H RW
Timer A control register TACON 243 F3H R/W
Timer A counter register TACNT 244 F4H R
Timer A data register TADATA 245 F5H R/W
Timer B data register(high byte) TBDATAH 246 F6H R/W
Timer B data register(low byte) TBDATAL 247 F7H R/W
Timer B control register TBCON 248 F8H R/W
Watch timer control register WTCON 249 F9H R/W
A/D converter data register(high byte) ADDATAH 250 FAH R
A/D converter data register(low byte) ADDATAL 251 FBH R
A/D converter control register ADCON 252 FCH R/W
UART control register UARTCON 253 FDH R/W
UART pending register UARTPND 254 FEH R/W
UART data register UDATA 255 FFH R/W
S3C9484/C9488/F9488 CONTROL REGISTER
4-3
Table 4-2. LCD display Register and Peripheral Registers (page 1)
Register Name Mnemonic Decimal Hex R/W
LCD Display RAM −000H R/W
LCD Display RAM −101H R/W
LCD Display RAM −202H R/W
LCD Display RAM −303H R/W
LCD Display RAM −404H R/W
LCD Display RAM −505H R/W
LCD Display RAM −606H R/W
LCD Display RAM −707H R/W
LCD Display RAM −808H R/W
LCD Display RAM −9 09H R/W
LCD Display RAM −10 0AH R/W
LCD Display RAM −11 0BH R/W
LCD Display RAM −12 0CH R/W
LCD Display RAM −13 0DH R/W
LCD Display RAM −14 0EH R/W
LCD Display RAM −15 0FH R/W
LCD Display RAM −16 10H R/W
LCD Display RAM −17 11H R/W
LCD Display RAM −18 12H R/W
Location 13H is not mapped
UART baud rate data register (high byte) BRDATAH 20 14H R/W
UART baud rate data register (low byte) BRDATAL 21 15H R/W
NOTE: When you use the SK-1000(SK-8xx) MDS , the BRDATAH/BRDATAL of mnemonic isn’t showed on the system
register window of MDS application program, because BRDATAH/BRDATAL is located on the general register
page1.
CONTROL REGISTERS S3C9484/C9488/F9488
4-4
FLAGS -
System Flags Register
.7 Carry Flag (C)
.6 Zero Flag (Z)
.5
Bit Identifier
RESET
Value
Read/Write
R = Read-only
W = Write-only
R/W = Read/write
'-' = Not used
RESET
value notation:
'-' = Not used
'x' = Undetermined value
'0' = Logic zero
'1' = Logic one
Bit number(s) that is/are appended to
the register name for bit addressing Name of individual
bit or related bits
Register nameRegister ID
Sign Flag (S)
0Operation does not generate a carry or borrow condition
0Operation generates carry-out or borrow into high-order bit 7
0Operation result is a non-zero value
0Operation result is zero
0Operation generates positive number (MSB = "0")
0Operation generates negative number (MSB = "1")
Description of the
effect of specific
bit settings
D5H
Register address
(hexadecimal)
.7 .6 .5
x
R/W
.4 .3 .2
Bit number:
MSB = Bit 7
LSB = Bit 0
.1 .0
x
R/W x
R/W x
R/W
Figure 4-1. Register Description Format
S3C9484/C9488/F9488 CONTROL REGISTER
4-5
ADCON — A/D Converter Control Register FCH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7-.4 A/D Input Pin Selection Bits
0000ADC0
0001ADC1
0010ADC2
0011ADC3
0100ADC4
0101ADC5
0110ADC6
0111ADC7
1000ADC8
Other value Connected with GND internally
.3 End-Of-Conversion (EOC) Status Bit
0A/D conversion is in progress
1A/D conversion complete
.2-.1 Clock Source Selection Bits
0 0 fxx/16 (fosc ≤ 8MHz)
0 1 fxx/8 (fosc ≤ 8MHz)
1 0 fxx/4 (fosc ≤ 8MHz)
1 1 fxx (fosc ≤ 2.5MHz)
.0 A/D conversion Start Bit
0Disable operation
1Start operation
NOTE:Maximum ADC clock input = 4MHz.
CONTROL REGISTERS S3C9484/C9488/F9488
4-6
BTCON — Basic Timer Control Register DCH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value ––––0000
Read/Write ––––R/W R/W R/W R/W
.7-.4 Not used for the S3C9484/C9488/F9488
.3-.2 Basic Timer Input Clock Selection Bits
0 0 fxx/4096 (3)
0 1 fxx/1024
1 0 fxx/128
1 1 Not used
.1 Basic Timer Counter Clear Bit (1)
0No effect
1Clear the basic timer counter value
.0 Clock Frequency Divider Clear Bit for Basic Timer (2)
0No effect
1Clear both clock frequency dividers
NOTES:
1. When you write a “1” to BTCON.1, the basic timer counter value is cleared to "00H". Immediately following the write
operation, the BTCON.1 value is automatically cleared to “0”.
2. When you write a "1" to BTCON.0, the corresponding frequency divider is cleared to "00H". Immediately following the
write operation, the BTCON.0 value is automatically cleared to "0".
3. The fxx is selected clock for system (main OSC. or sub OSC).
S3C9484/C9488/F9488 CONTROL REGISTER
4-7
CLKCON — System Clock Control Register D4H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 0––00–––
Read/Write R/W – – R/W R/W –––
.7 Oscillator IRQ Wake-up Function Enable Bit
0Enable IRQ for main system oscillator wake-up function
1Disable IRQ for main system oscillator wake-up function
.6-.5 Not used for the S3C9484/C9488/F9488
.4-.3 CPU Clock (System Clock) Selection Bits (note)
0 0 fxx/16
0 1 fxx/8
1 0 fxx/2
1 1 fxx/1 (non-divided)
.2-.0 Not used for the S3C9484/C9488/F9488
NOTE: After a reset, the slowest clock (divided by 16) is selected as the system clock. To select faster clock speeds, load
the appropriate values to CLKCON.3 and CLKCON.4.
CONTROL REGISTERS S3C9484/C9488/F9488
4-8
FLAGS — System Flags Register D5H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET /Value xxxx––––
Read/Write R/W R/W R/W R/W ––––
.7 Carry Flag (C)
0Operation does not generate a carry or borrow condition
1Operation generates a carry-out or borrow into high-order bit 7
.6 Zero Flag (Z)
0Operation result is a non-zero value
1Operation result is zero
.5 Sign Flag (S)
0Operation generates a positive number (MSB = "0")
1Operation generates a negative number (MSB = "1")
.4 Overflow Flag (V)
0Operation result is ≤ + 127 or _ – 128
1Operation result is > + 127 or < – 128
.3–.0 Not used for the S3C9484/C9488/F9488
S3C9484/C9488/F9488 CONTROL REGISTER
4-9
LCDCON — LCD Control Register D0H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 0–000000
Read/Write R/W –R/W R/W R/W R/W R/W R/W
.7 LCD Module enable/disable Bit
0Disable LCD Module
1Enable LCD Module
.6 Not used for the S3C9484/C9488/F9488
.5-.4 LCD Duty Selection Bit
0 0 1/8 duty , 1/4 bias
0 1 1/4 duty , 1/3 bias
1xStatic
.3-.2 LCD Dot On/Off Control Bits
0 0 Off signal
0 1 On signal
1xNormal display
.1-.0 LCD Clock Signal Selection Bits
0 0 fw/27
0 1 fw/26
1 0 fw/25
1 1 fw/24
CONTROL REGISTERS S3C9484/C9488/F9488
4-10
LCDVOL — LCD Voltage Control Register D1H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 0–––0000
Read/Write R/W –––R/W R/W R/W R/W
.7 LCD Contrast Control Enable/Disable Bit
0Disable LCD Contrast Module
1Enable LCD Contrast Module
.6-.4 Not used for the S3C9484/C9488/F9488
.3-.0 LCD Segment/Port Output Selection Bits:
0000 1/16 step (The dimmest level)
0001 2/16 step
0010 3/16 step
0011 4/16 step
0100 5/16 step
0101 6/16 step
0110 7/16 step
0111 8/16 step
1000 9/16 step
1001 10/16 step
1010 11/16 step
1011 12/16 step
1100 13/16 step
1101 14/16 step
1110 15/16 step
1111 16/16 step
S3C9484/C9488/F9488 CONTROL REGISTER
4-11
OSCCON — Oscillator Control Register D6H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value ––––00–0
Read/Write ––––R/W R/W –R/W
.7-.4 Not used for the S3C9484/C9488/F9488
.3 Main System Oscillator Control Bit
0Main System Oscillator RUN
1Main System Oscillator STOP
.2 Sub System Oscillator Control Bit
0Sub system oscillator RUN
1Sub system oscillator STOP
.1 Not used for the S3C9484/C9488/F9488
.0 System Clock Selection Bit
0Main oscillator select
1Subsystem oscillator select
CONTROL REGISTERS S3C9484/C9488/F9488
4-12
P0CONH — Port 0 Control Register (High Byte) E6H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7-.6 P0.7/COM4/ADC4
0 0 Input mode
0 1 Alternative function; ADC4 input
1 0 Push-pull output
1 1 Alternative function; LCD COM4 signal output
.5-.4 P0.6/COM5/ADC5
0 0 Input mode
0 1 Alternative function; ADC5 input
1 0 Push-pull output
1 1 Alternative function; LCD COM5 signal output
.3–.2 P0.5/ COM6/ADC6
0 0 Input mode
0 1 Alternative function; ADC6 input
1 0 Push-pull output
1 1 Alternative function; LCD COM6 signal output
.1–.0 P0.4/ COM7/ADC7
0 0 Input mode
0 1 Alternative function; ADC7 input
1 0 Push-pull output
1 1 Alternative function; LCD COM7 signal output
NOTE: When users use Port 0, users must be care of the pull-up resistance status.
S3C9484/C9488/F9488 CONTROL REGISTER
4-13
P0CONL — Port 0 Control Register (Low Byte) E7H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7–.6 P0.3/ADC8
0xInput mode
1 0 Push-pull output
1xAlternative function; ADC8 input
.5–.4 P0.2
0xInput mode
1xPush-pull output
.3–.2 P0.1
0xInput mode
1xPush-pull output
.1–.0 P0.0
0xInput mode
1xPush-pull output
NOTES:
1. If you selected the Xtin/Xtout function at Smart option, no relations to P0CONL.3 -.0 bit value. But if you selected the
normal I/O function at Smart option, the reset value of P0CONL.3 -.0 bits are ‘0000’.
2. When users use Port 0, users must be care of the pull-up resistance status.
CONTROL REGISTERS S3C9484/C9488/F9488
4-14
P0PUR — Port 0 Pull-up Resistor Control Register D2H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 11111111
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7 P0.7 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.6 P0.6 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.5 P0.5 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.4 P0.4 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.3 P0.3 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.2 P0.2 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.1 P0.1 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.0 P0.0 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
S3C9484/C9488/F9488 CONTROL REGISTER
4-15
P1CONH — Port 1 Control Register (High Byte) E8H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7-.6 P1.7/COM0
0xInput mode
1 0 Push-pull output
1 1 Alternative function; LCD COM0 signal output
.5-.4 P1.6/COM1
0xInput mode
1 0 Push-pull output
1 1 Alternative function; LCD COM1 signal output
.3-.2 P1.5/COM2
0xInput mode
1 0 Push-pull output
1 1 Alternative function; LCD COM2 signal output
.1-.0 P1.4/COM3
0xInput mode
1 0 Push-pull output
1 1 Alternative function; LCD COM3 signal output
NOTE: When users use Port 1, users must be care of the pull-up resistance status.
CONTROL REGISTERS S3C9484/C9488/F9488
4-16
P1CONL — Port 1 Control Register (Low Byte) E9H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7-.6 P1.3/ADC0
0XInput mode
1 0 Push-pull output
1 1 Alternative function; ADC0 input
.5-.4 P1.2/ADC1
0XInput mode
1 0 Push-pull output
1 1 Alternative function; ADC1 input
.3-.2 P1.1/ADC2/BUZ
0 0 Input mode
0 1 Alternative function; BUZ output
1 0 Push-pull output
1 1 Alternative function; ADC2 input
.1-.0 P1.0/ADC3/TBPWM
0 0 Input mode
0 1 Alternative function; TBPWM output
1 0 Push-pull output
1 1 Alternative function; ADC3 input
NOTE: When users use Port 1, users must be care of the pull-up resistance status.
S3C9484/C9488/F9488 CONTROL REGISTER
4-17
P1PUR — Port 1 Pull-up Resistor Control Register D3H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 11111111
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7 P1.7 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.6 P1.6 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.5 P1.5 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.4 P1.4 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.3 P1.3 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.2 P1.2 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.1 P1.1 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
.0 P1.0 Pull-up Resistor Enable/Disable
0Pull-up resistor disable
1Pull-up resistor enable
CONTROL REGISTERS S3C9484/C9488/F9488
4-18
P2CONH — Port 2 Control Register (High Byte) EAH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7–.6 P2.7/SEG10
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG10 signal output
.5-.4 P2.6/SEG9
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG9 signal output
.3–.2 P2.5/SEG8
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG8 signal output
.1–.0 P2.4/SEG7
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG7 signal output
S3C9484/C9488/F9488 CONTROL REGISTER
4-19
P2CONL — Port 2 Control Register (Low Byte) EBH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7-.6 P2.3/SEG6
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG6 signal output
.5-.4 P2.2/SEG5
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG5 signal output
.3-.2 P2.1/SEG4
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG4 signal output
.1-.0 P2.0/SEG3
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG3 signal output
CONTROL REGISTERS S3C9484/C9488/F9488
4-20
P3CONH — Port 3 Control Register (High Byte) ECH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value SSSSSSSS
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7–.6 P3.6/TACAP/INT3
0 0 Input mode with pull-up; interrupt(INT3) input; TACAP
0 1 Input mode; interrupt(INT3) input; TACAP
1xPush-pull output
.5–.4 P3.5/TACK/INT2
0 0 Input mode with pull-up; interrupt(INT2) input; TACK
0 1 Input mode; interrupt(INT2) input; TACK
1xPush-pull output
.3–.2 P3.4/TAOUT(TAPWM)/INT1
0 0 Input mode with pull-up; interrupt(INT1) input
0 1 Input mode; interrupt(INT1) input
1 0 Push-pull output
1 1 Alternative function; TAOUT(TAPWM)
.1–.0 P3.3/SEG18/INT0
0 0 Input mode with pull-up; interrupt(INT0) input
0 1 Input mode; interrupt(INT0) input
1 0 Push-pull output
1 1 Alternative function; LCD SEG18 signal output
NOTE: ‘S’ of reset value mean that reset value is set by smart option.
S3C9484/C9488/F9488 CONTROL REGISTER
4-21
P3CONL — Port 3 Control Register (Low Byte) EDH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7-.5 P3.2/SEG17/TXD
0 0 0 Input mode with pull-up
0 0 1 Input mode
0 1 0 Push-pull output
0 1 1 Alternative function; TXD output
1x x Alternative function; LCD SEG17 signal output
.4-.2 P3.1/SEG16/RXD
0 0 0 Input mode with pull-up; RXD input
0 0 1 Input mode; RXD input
0 1 0 Push-pull output
0 1 1 Alternative function; RXD output
1x x Alternative function; LCD SEG16 signal output
.1-.0 P3.0/ SEG15
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG15 signal output
CONTROL REGISTERS S3C9484/C9488/F9488
4-22
P3INT — Port 3 Interrupt Control Register EEH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7-.6 P3.6/ INT3 Interrupt Enable/Disable Selection Bits
0xInterrupt Disable
1 0 Interrupt Enable; falling edge
1 1 Interrupt Enable; rising edge
.5-.4 P3.5/ INT2 Interrupt Enable/Disable Selection Bits
0xInterrupt Disable
1 0 Interrupt Enable; falling edge
1 1 Interrupt Enable; rising edge
.3-.2 P3.4/ INT1 Interrupt Enable/Disable Selection Bits
0xInterrupt Disable
1 0 Interrupt Enable; falling edge
1 1 Interrupt Enable; rising edge
.1-.0 P3.3/INT0 Interrupt Enable/Disable Selection Bits
0xInterrupt Disable
1 0 Interrupt Enable; falling edge
1 1 Interrupt Enable; rising edge
S3C9484/C9488/F9488 CONTROL REGISTER
4-23
P3PND — Port 3 Interrupt Pending Register EFH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value ––––0000
Read/Write ––––R/W R/W R/W R/W
.7-.4 Not used for the S3C9484/C9488/F9488
.3 P3.6/INT3 Interrupt Pending Bit
0Interrupt request is not pending, pending bit clear when write 0
1Interrupt request is pending
.2 P3.5/INT2 Interrupt Pending Bit
0Interrupt request is not pending, pending bit clear when write 0
1Interrupt request is pending
.1 P3.4/INT1 Interrupt Pending Bit
0Interrupt request is not pending, pending bit clear when write 0
1Interrupt request is pending
.0 P3.3/INT0 Interrupt Pending Bit
0Interrupt request is not pending, pending bit clear when write 0
1Interrupt request is pending
CONTROL REGISTERS S3C9484/C9488/F9488
4-24
P4CONH — Port 4 Control Register (High Byte) F0H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value ––000000
Read/Write – – R/W R/W R/W R/W R/W R/W
.7–.6 Not used for the S3C9484/C9488/F9488
.5-.4 P4.6/SEG14
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG14 signal output
.3–.2 P4.5/SEG13
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG13 signal output
.1–.0 P4.4/SEG12
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG12 signal output
S3C9484/C9488/F9488 CONTROL REGISTER
4-25
P4CONL — Port 4 Control Register (Low Byte) F1H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7-.6 P4.3/SEG11
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG11 signal output
.5-.4 P4.2/SEG2
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG2 signal output
.3-.2 P4.1/SEG1
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG1signal output
.1-.0 P4.0/SEG0
0 0 Input mode with pull-up
0 1 Input mode
1 0 Push-pull output
1 1 Alternative function; LCD SEG0 signal output
CONTROL REGISTERS S3C9484/C9488/F9488
4-26
SP — Stack Pointer D9H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value xxxxxxxx
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7–.0 Stack Pointer Address
The stack pointer value is 8-bit stack pointer address (SP7–SP0). The SP value is
undefined following a reset.
STPCON — Stop Control Register D7H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7–.0 STOP Control Bits
1 0 1 0 0 1 0 1 Enable stop instruction
Other values Disable stop instruction
NOTE: Before executing the STOP instruction, you must set this STPCON register as “10100101b”. Otherwise the STOP
instruction will not be executed.
S3C9484/C9488/F9488 CONTROL REGISTER
4-27
SYM — System Mode Register DFH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value ––––0000
Read/Write ––––R/W R/W R/W R/W
.7–.4 Not used for S3C9484/C9488/F9488
.3 Global Interrupt Enable Bit
0Disable all interrupts
1Enable all interrupt
.2–.0 Page Select Bits
000Page 0
001Page 1
010Page 2 (Not used for S3C9484/C9488/F9488)
011Page 3 (Not used for S3C9484/C9488/F9488)
100Page 4 (Not used for S3C9484/C9488/F9488)
101Page 5 (Not used for S3C9484/C9488/F9488)
110Page 6 (Not used for S3C9484/C9488/F9488)
111Page 7 (Not used for S3C9484/C9488/F9488)
NOTE: Following a reset, you must enable global interrupt processing by executing an EI instruction (not by writing a "1"
to SYM.3).
CONTROL REGISTERS S3C9484/C9488/F9488
4-28
TACON — Timer A Control Register F3H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7-.6 Timer A Input Clock Selection Bits
0 0 fxx/1024
0 1 fxx/256
1 0 fxx/64
1 1 External clock (TACK)
.5-.4 Timer A Operating Mode Selection Bits
0 0 Internal mode (TAOUT mode)
0 1 Capture mode (capture on rising edge, counter running, OVF can occur)
1 0 Capture mode (capture on falling edge, counter running, OVF can occur)
1 1 PWM mode (OVF interrupt can occur)
.3 Timer A Counter Clear Bit
0No effect
1Clear the timer A counter (After clearing, return to zero)
.2 Timer A Overflow Interrupt Enable Bit
0Disable interrupt
1Enable interrupt
.1 Timer A Match/Capture Interrupt Enable Bit
0Disable interrupt
1Enable interrupt
.0 Timer A Start/Stop Bit
0Stop Timer A
1Start Timer A
S3C9484/C9488/F9488 CONTROL REGISTER
4-29
TBCON — Timer B Control Register F8H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7–.6 Timer B Input Clock Selection Bits
0 0 fxx
0 1 fxx/2
1 0 fxx/4
1 1 fxx/8
.5–.4 Timer B Interrupt Time Selection Bits
0 0 Elapsed time for low data value
0 1 Elapsed time for high data value
1 0 Elapsed time for low and high data values
1 1 Invalid setting
.3 Timer B Underflow Interrupt Enable Bit
0Disable Interrupt
1Enable Interrupt
.2 Timer B Start/Stop Bit
0Stop timer B
1Start timer B
.1 Timer B Mode Selection Bit
0One-shot mode
1Repeating mode
.0 Timer B Output flip-flop Control Bit
0T-FF is low
1T-FF is high
NOTE: fxx is selected clock for system.
CONTROL REGISTERS S3C9484/C9488/F9488
4-30
TINTPND — Timer A,B Interrupt Pending Register F2H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value –––––000
Read/Write –––––R/W R/W R/W
.7-.3 Not used for the S3C9484/C9488/F9488
.2 Timer B Underflow Interrupt Pending Bit
0No interrupt pending
0Clear pending bit when write
1Interrupt pending
.1 Timer A Overflow Interrupt Pending Bit
0No interrupt pending
0Clear pending bit when write
1Interrupt pending
.0 Timer A Match/Capture Interrupt Pending Bit
0No interrupt pending
0Clear pending bit when write
1Interrupt pending
S3C9484/C9488/F9488 CONTROL REGISTER
4-31
UARTCON — UART Control Register FDH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7–.6 Operating mode and baud rate selection bits
0 0 Mode 0: Shift Register [fxx/(16 × (16bit BRDATA + 1))]
0 1 Mode 1: 8-bit UART [fxx/(16 × (16bit BRDATA + 1))]
1xMode 2: 9-bit UART [fxx/(16 × (16bit BRDATA + 1))]
.5 Multiprocessor communication(1) enable bit (for modes 2 only)
0Disable
1Enable
.4 Serial data receive enable bit
0Disable
1Enable
.3 If Parity disable mode (PEN = 0),
Location of the 9th data bit to be transmitted in UART mode 2 ("0" or "1").
If Parity enable mode (PEN = 1),
even/odd parity selection bit for transmit data in UART mode 2.
0: Even parity bit generation for transmit data
1: Odd parity bit generation for transmit data
CONTROL REGISTERS S3C9484/C9488/F9488
4-32
UARTCON — UART Control Register (Continued) FDH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.2 If Parity disable (PEN = 0),
location of the 9th data bit that was received in UART mode 2 ("0" or "1").
If Parity enable mode (PEN = 1),
even/odd parity selection bit for receive data in UART mode 2.
0: Even parity check for the received data
1: Odd parity check for the received data
A result of parity error will be saved in RPE bit of the UARTPND register after parity
checking of the received data.
.1 Receive interrupt enable bit
0Disable Receive interrupt
1Enable Receive interrupt
.0 Transmit interrupt enable bit
0Disable Transmit interrupt
1Enable Transmit Interrupt
NOTES:
1. In mode 2, if the MCE (UARTCON.5) bit is set to "1", the receive interrupt will not be activated if the received
9th data bit is "0". In mode 1, if MCE = "1”, the receive interrupt will not be activated if a valid stop bit was not
received. In mode 0, the MCE (UARTCON.5) bit should be "0".
2. The descriptions for 8-bit and 9-bit UART mode don’t include start and stop bits for serial data receive and transmit.
3. Parity enable bits, PEN, are located in the UARTPND register at address FEH.
4. Parity enable and parity error check can be available in 9-bit UART mode (Mode 2) only.
S3C9484/C9488/F9488 CONTROL REGISTER
4-33
UARTPND — UART Pending and parity control FEH
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value ––00––00
Read/Write – – R/W R/W – – R/W R/W
.7-.6 Not used for the S3C9484/C9488/F9488
.5 UART parity enable/disable (PEN)
0Disable
1Enable
.4 UART receive parity error (RPE)
0No error
1Parity error
.3-.2 Not used for the S3C9484/C9488/F9488
.1 UART receive interrupt pending flag
0Not pending
0Clear pending bit (when write)
1Interrupt pending
.0 UART transmit interrupt pending flag
0Not pending
0Clear pending bit (when write)
1Interrupt pending
NOTES:
1. In order to clear a data transmit or receive interrupt pending flag, you must write a "0" to the appropriate pending bit.
2. To avoid programming errors, we recommend using load instruction (except for LDB), when manipulating
UARTPND values.
3. Parity enable and parity error check can be available in 9-bit UART mode (Mode 2) only.
4. Parity error bit (RPE) will be refreshed whenever 8th receive data bit has been shifted.
CONTROL REGISTERS S3C9484/C9488/F9488
4-34
VLDCON — Voltage Level Detector Control Register D8H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value –0101100
Read/Write –RR/W R/W R/W R/W R/W R/W
.7 Not used for the S3C9484/C9488/F9488
.6 VLD Level Set Bit
0VDD is higher than reference voltage
1VDD is lower than reference voltage
.5-.1 Reference Voltage Selection Bits
10110 VVLD = 2.4 V
10011 VVLD = 2.7 V
01110 VVLD = 3.3 V
01011 VVLD = 3.9 V
Other values Don’t care
.0 VLD Operation Enable Bit
0Operation off
1Operation on
S3C9484/C9488/F9488 CONTROL REGISTER
4-35
WDTCON — Watchdog Timer Control Register E5H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7-.4 Watchdog Timer Function Enable Bits (for System Reset)
1 0 1 0 Disable watchdog timer function
Other values Enable watchdog timer function
.3-.0 Watchdog Timer Counter Clear Bits
1 0 1 0 Clear watchdog timer counter
Other values Don’t care
CONTROL REGISTERS S3C9484/C9488/F9488
4-36
WTCON — Watch Timer Control Register F9H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESET Value 00000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
.7 Watch Timer Clock Selection Bit
0Main system clock divided by 27 (fxx/128)
1Sub system clock (fxt)
.6 Watch Timer Interrupt Enable Bit
0Disable watch timer interrupt
1Enable watch timer interrupt
.5–.4 Buzzer Signal Selection Bits
0 0 0.5 kHz buzzer (BUZ) signal output
0 1 1 kHz buzzer (BUZ) signal output
1 0 2 kHz buzzer (BUZ) signal output
1 1 4 kHz buzzer (BUZ) signal output
.3–.2 Watch Timer Speed Selection Bits
0 0 1.0 s Interval
0 1 0.5 s Interval
1 0 0.25 s Interval
1 1 3.91 ms Interval
.1 Watch Timer Enable Bit
0Disable watch timer; Clear frequency dividing circuits
1Enable watch timer
.0 Watch Timer Interrupt Pending Bit
0Interrupt is not pending, Clear pending bit when write
1Interrupt is pending
S3C9484/C9488/F9488 INTERRUPT STRUCTURE
5-1
5INTERRUPT STRUCTURE
OVERVIEW
The SAM88RCRI interrupt structure has two basic components: a vector, and sources. The number of interrupt
sources can be serviced through an interrupt vector which is assigned in ROM address 0000H.
VECTOR SOURCES
0000H
0001H
NOTES:
1. The SAM88RCRI interrupt has only one vector address (0000H-0001H).
2. The numbern of Sn value is expandable.
S1
S2
S3
Sn
Figure 5-1. S3C9-Series Interrupt Type
INTERRUPT PROCESSING CONTROL POINTS
Interrupt processing can be controlled in two ways: either globally or specific interrupt level and source.
The system-level control points in the interrupt structure are therefore:
—Global interrupt enable and disable (by EI and DI instructions)
—Interrupt source enable and disable settings in the corresponding peripheral control register(s)
INTERRUPT STRUCTURE S3C9484/C9488/F9488
5-2
ENABLE/DISABLE INTERRUPT INSTRUCTIONS (EI, DI)
The system mode register, SYM (DFH), is used to enable and disable interrupt processing.
SYM.3 is the enable and disable bit for global interrupt processing respectively, by modifying SYM.3. An Enable
Interrupt (EI) instruction must be included in the initialization routine that follows a reset operation in order to enable
interrupt processing. Although you can manipulate SYM.3 directly to enable and disable interrupts during normal
operation, we recommend that you use the EI and DI instructions for this purpose.
INTERRUPT PENDING FUNCTION TYPES
When the interrupt service routine has executed, the application program's service routine must clear the appropriate
pending bit before the return from interrupt subroutine (IRET) occurs.
INTERRUPT PRIORITY
Because there is not a interrupt priority register in SAM88RCRI, the order of service is determined by a sequence of
source which is executed in interrupt service routine.
Interrupt Pending
Register
Global Interrupt
Control (EI, DI instruction)
Vector Interrupt
Cycle
Interrpt priority
is determind by
software polling
method
"EI" Instruction
Execution
RESET
Source Interrupts
Source Interrupt
Enable
S
R
Q
Figure 5-2. Interrupt Function Diagram
S3C9484/C9488/F9488 INTERRUPT STRUCTURE
5-3
INTERRUPT SOURCE SERVICE SEQUENCE
The interrupt request polling and servicing sequence is as follows:
1. A source generates an interrupt request by setting the interrupt request pending bit to "1".
2. The CPU generates an interrupt acknowledge signal.
3. The service routine starts and the source's pending flag is cleared to "0" by software.
4. Interrupt priority must be determined by software polling method.
INTERRUPT SERVICE ROUTINES
Before an interrupt request can be serviced, the following conditions must be met:
—Interrupt processing must be enabled (EI, SYM.3 = "1")
—Interrupt must be enabled at the interrupt's source (peripheral control register)
If all of the above conditions are met, the interrupt request is acknowledged at the end of the instruction cycle. The
CPU then initiates an interrupt machine cycle that completes the following processing sequence:
1. Reset (clear to "0") the global interrupt enable bit in the SYM register (DI, SYM.3 = "0")
to disable all subsequent interrupts.
2. Save the program counter and status flags to stack.
3. Branch to the interrupt vector to fetch the service routine's address.
4. Pass control to the interrupt service routine.
When the interrupt service routine is completed, an Interrupt Return instruction (IRET) occurs. The IRET restores the
PC and status flags and sets SYM.3 to "1" (EI), allowing the CPU to process the next interrupt request.
GENERATING INTERRUPT VECTOR ADDRESSES
The interrupt vector area in the ROM contains the address of the interrupt service routine. Vectored interrupt
processing follows this sequence:
1. Push the program counter's low-byte value to stack.
2. Push the program counter's high-byte value to stack.
3. Push the FLAGS register values to stack.
4. Fetch the service routine's high-byte address from the vector address 0000H.
5. Fetch the service routine's low-byte address from the vector address 0001H.
6. Branch to the service routine specified by the 16-bit vector address.
INTERRUPT STRUCTURE S3C9484/C9488/F9488
5-4
S3C9484/C9488/F9488 INTERRUPT STRUCTURE
The S3C9484/C9488/F9488 microcontroller has four peripheral interrupt sources:
—Timer A match / overflow
—Timer B underflow
—P3.3 / P3.4 / P3.5 / P3.6 external interrupt
—Watch Timer interrupt
—UART transmit interrupt / receive interrupt
0000H
0001H
Vector Pending Bits Enable/Disable Source
UARTPND.1 UARTCON.1
UART receive
UARTPND.0 UARTCON.0
UART transmit
TINTPND.1
SYM.3
(EI, DI)
TINTPND.2
P3PND.0
P3PND.1
TACON.2
TBCON.3
P3INT.0-.1
P3INT.2-.3
Timer A Overflow
Timer B underflow
P3.3 External Interrupt
(INT0)
P3.4 External Interrupt
(INT1)
P3PND.2
P3PND.3
WTCON.0
TACON.1 Timer A match
P3INT.4-.5
P3INT.6-.7
WTCON.1
P3.5 External Interrupt
(INT2)
P3.6 External Interrupt
(INT3)
Watch Timer interrupt
TINTPND.0
Figure 5-3. S3C9484/C9488/F9488 Interrupt Structure
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-1
6SAM88RCRI INSTRUCTION SET
OVERVIEW
The SAM88RCRI instruction set is designed to support the large register file. It includes a full complement of
8-bit arithmetic and logic operations. There are 41 instructions. No special I/O instructions are necessary because
I/O control and data registers are mapped directly into the register file. Flexible instructions for bit addressing, rotate,
and shift operations complete the powerful data manipulation capabilities of the SAM88RCRI instruction set.
REGISTER ADDRESSING
To access an individual register, an 8-bit address in the range 0-255 or the 4-bit address of a working register is
specified. Paired registers can be used to construct 13-bit program memory or data memory addresses. For detailed
information about register addressing, please refer to Chapter 2, "Address Spaces".
ADDRESSING MODES
There are six addressing modes: Register (R), Indirect Register (IR), Indexed (X), Direct (DA), Relative (RA), and
Immediate (IM). For detailed descriptions of these addressing modes, please refer to Chapter 3, "Addressing
Modes".
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-2
Table 6-1. Instruction Group Summary
Mnemonic Operands Instruction
Load Instructions
CLR dst Clear
LD dst,src Load
LDC dst,src Load program memory
LDE dst,src Load external data memory
LDCD dst,src Load program memory and decrement
LDED dst,src Load external data memory and decrement
LDCI dst,src Load program memory and increment
LDEI dst,src Load external data memory and increment
POP dst Pop from stack
PUSH src Push to stack
Arithmetic Instructions
ADC dst,src Add with carry
ADD dst,src Add
CP dst,src Compare
DEC dst Decrement
INC dst Increment
SBC dst,src Subtract with carry
SUB dst,src Subtract
Logic Instructions
AND dst,src Logical AND
COM dst Complement
OR dst,src Logical OR
XOR dst,src Logical exclusive OR
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-3
Table 6-1. Instruction Group Summary (Continued)
Mnemonic Operands Instruction
Program Control Instructions
CALL dst Call procedure
IRET Interrupt return
JP cc,dst Jump on condition code
JP dst Jump unconditional
JR cc,dst Jump relative on condition code
RET Return
Bit Manipulation Instructions
TCM dst,src Test complement under mask
TM dst,src Test under mask
Rotate and Shift Instructions
RL dst Rotate left
RLC dst Rotate left through carry
RR dst Rotate right
RRC dst Rotate right through carry
SRA dst Shift right arithmetic
CPU Control Instructions
CCF Complement carry flag
DI Disable interrupts
EI Enable interrupts
IDLE Enter Idle mode
NOP No operation
RCF Reset carry flag
SCF Set carry flag
STOP Enter stop mode
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-4
FLAGS REGISTER (FLAGS)
The flags register FLAGS contains eight bits that describe the current status of CPU operations. Four of these bits,
FLAGS.4–FLAGS.7, can be tested and used with conditional jump instructions;
FLAGS register can be set or reset by instructions as long as its outcome does not affect the flags, such as, Load
instruction. Logical and Arithmetic instructions such as, AND, OR, XOR, ADD, and SUB can affect the Flags
register. For example, the AND instruction updates the Zero, Sign and Overflow flags based on the outcome of the
AND instruction. If the AND instruction uses the Flags register as the destination, then simultaneously, two write will
occur to the Flags register producing an unpredictable result.
System Flags Register (FLAGS)
D5H, R/W
.7 .6 .5 .4 .3 .2 .1 .0MSB LSB
Carry flag (C)
Zero flag (Z)
Sign flag (S)
Overflow flag (V)
Not mapped
Figure 6-1. System Flags Register (FLAGS)
FLAG DESCRIPTIONS
Overflow Flag (FLAGS.4, V)
The V flag is set to "1" when the result of a two's-complement operation is greater than + 127 or less than – 128. It
is also cleared to "0" following logic operations.
Sign Flag (FLAGS.5, S)
Following arithmetic, logic, rotate, or shift operations, the sign bit identifies the state of the MSB of the result. A
logic zero indicates a positive number and a logic one indicates a negative number.
Zero Flag (FLAGS.6, Z)
For arithmetic and logic operations, the Z flag is set to "1" if the result of the operation is zero. For operations that
test register bits, and for shift and rotate operations, the Z flag is set to "1" if the result is logic zero.
Carry Flag (FLAGS.7, C)
The C flag is set to "1" if the result from an arithmetic operation generates a carry-out from or a borrow to the bit 7
position (MSB). After rotate and shift operations, it contains the last value shifted out of the specified register.
Program instructions can set, clear, or complement the carry flag.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-5
INSTRUCTION SET NOTATION
Table 6-2. Flag Notation Conventions
Flag Description
CCarry flag
ZZero flag
SSign flag
VOverflow flag
0Cleared to logic zero
1Set to logic one
*Set or cleared according to operation
–Value is unaffected
xValue is undefined
Table 6-3. Instruction Set Symbols
Symbol Description
dst Destination operand
src Source operand
@Indirect register address prefix
PC Program counter
FLAGS Flags register (D5H)
#Immediate operand or register address prefix
HHexadecimal number suffix
DDecimal number suffix
BBinary number suffix
opc Opcode
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-6
Table 6-4. Instruction Notation Conventions
Notation Description Actual Operand Range
cc Condition code See list of condition codes in Table 6-6.
rWorking register only Rn (n = 0–15)
rr Working register pair RRp (p = 0, 2, 4, ..., 14)
RRegister or working register reg or Rn (reg = 0–255, n = 0–15)
RR Register pair or working register pair reg or RRp (reg = 0–254, even number only, where
p = 0, 2, ..., 14)
Ir Indirect working register only @Rn (n = 0–15)
IR Indirect register or indirect working register @Rn or @reg (reg = 0–255, n = 0–15)
Irr Indirect working register pair only @RRp (p = 0, 2, ..., 14)
IRR Indirect register pair or indirect working
register pair @RRp or @reg (reg = 0–254, even only, where
p = 0, 2, ..., 14)
XIndexed addressing mode #reg[Rn] (reg = 0–255, n = 0–15)
XS Indexed (short offset) addressing mode #addr[RRp] (addr = range – 128 to + 127, where
p = 0, 2, ..., 14)
XL Indexed (long offset) addressing mode #addr [RRp] (addr = range 0–8191, where
p = 0, 2, ..., 14)
DA Direct addressing mode addr (addr = range 0–8191)
RA Relative addressing mode addr (addr = number in the range + 127 to – 128 that is
an offset relative to the address of the next instruction)
IM Immediate addressing mode #data (data = 0–255)
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-7
Table 6-5. Opcode Quick Reference
OPCODE MAP
LOWER NIBBLE (HEX)
–01234567
U0DEC
R1 DEC
IR1 ADD
r1,r2 ADD
r1,Ir2 ADD
R2,R1 ADD
IR2,R1 ADD
R1,IM
P1RLC
R1 RLC
IR1 ADC
r1,r2 ADC
r1,Ir2 ADC
R2,R1 ADC
IR2,R1 ADC
R1,IM
P2INC
R1 INC
IR1 SUB
r1,r2 SUB
r1,Ir2 SUB
R2,R1 SUB
IR2,R1 SUB
R1,IM
E3JP
IRR1 SBC
r1,r2 SBC
r1,Ir2 SBC
R2,R1 SBC
IR2,R1 SBC
R1,IM
R4OR
r1,r2 OR
r1,Ir2 OR
R2,R1 OR
IR2,R1 OR
R1,IM
5POP
R1 POP
IR1 AND
r1,r2 AND
r1,Ir2 AND
R2,R1 AND
IR2,R1 AND
R1,IM
N6COM
R1 COM
IR1 TCM
r1,r2 TCM
r1,Ir2 TCM
R2,R1 TCM
IR2,R1 TCM
R1,IM
I7PUSH
R2 PUSH
IR2 TM
r1,r2 TM
r1,Ir2 TM
R2,R1 TM
IR2,R1 TM
R1,IM
B8LD
r1, x, r2
B9RL
R1 RL
IR1 LD
r2, x, r1
LACP
r1,r2 CP
r1,Ir2 CP
R2,R1 CP
IR2,R1 CP
R1,IM LDC
r1, Irr2, xL
EBCLR
R1 CLR
IR1 XOR
r1,r2 XOR
r1,Ir2 XOR
R2,R1 XOR
IR2,R1 XOR
R1,IM LDC
r2, Irr2, xL
C RRC
R1 RRC
IR1 LDC
r1,Irr2 LD
r1, Ir2
HDSRA
R1 SRA
IR1 LDC
r2,Irr1 LD
IR1,IM LD
Ir1, r2
EERR
R1 RR
IR1 LDCD
r1,Irr2 LDCI
r1,Irr2 LD
R2,R1 LD
R2,IR1 LD
R1,IM LDC
r1, Irr2, xs
XFCALL
IRR1 LD
IR2,R1 CALL
DA1 LDC
r2, Irr1, xs
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-8
Table 6-5. Opcode Quick Reference (Continued)
OPCODE MAP
LOWER NIBBLE (HEX)
– 8 9 ABCDEF
U0LD
r1,R2 LD
r2,R1 JR
cc,RA LD
r1,IM JP
cc,DA INC
r1
P1¯¯ ¯¯¯¯
P2
E3
R4
5
N6IDLE
I7¯¯ ¯¯¯¯STOP
B8DI
B9EI
LARET
EBIRET
CRCF
HD¯¯ ¯¯¯¯SCF
EECCF
XFLD
r1,R2 LD
r2,R1 JR
cc,RA LD
r1,IM JP
cc,DA INC
r1 NOP
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-9
CONDITION CODES
The opcode of a conditional jump always contains a 4-bit field called the condition code (cc). This specifies under
which conditions it is to execute the jump. For example, a conditional jump with the condition code for "equal" after
a compare operation only jumps if the two operands are equal. Condition codes are listed in Table 6-6.
The carry (C), zero (Z), sign (S), and overflow (V) flags are used to control the operation of conditional jump
instructions.
Table 6-6. Condition Codes
Binary Mnemonic Description Flags Set
0000 FAlways false –
1000 TAlways true –
0111 (1) CCarry C = 1
1111 (1) NC No carry C = 0
0110 (1) ZZero Z = 1
1110 (1) NZ Not zero Z = 0
1101 PL Plus S = 0
0101 MI Minus S = 1
0100 OV Overflow V = 1
1100 NOV No overflow V = 0
0110 (1) EQ Equal Z = 1
1110 (1) NE Not equal Z = 0
1001 GE Greater than or equal (S XOR V) = 0
0001 LT Less than (S XOR V) = 1
1010 GT Greater than (Z OR (S XOR V)) = 0
0010 LE Less than or equal (Z OR (S XOR V)) = 1
1111 (1) UGE Unsigned greater than or equal C = 0
0111 (1) ULT Unsigned less than C = 1
1011 UGT Unsigned greater than (C = 0 AND Z = 0) = 1
0011 ULE Unsigned less than or equal (C OR Z) = 1
NOTES:
1. It indicates condition codes that are related to two different mnemonics but which test the same flag.
For example, Z and EQ are both true if the zero flag (Z) is set, but after an ADD instruction, Z would probably be used;
after a CP instruction, however, EQ would probably be used.
2. For operations involving unsigned numbers, the special condition codes UGE, ULT, UGT, and ULE must be used.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-10
INSTRUCTION DESCRIPTIONS
This section contains detailed information and programming examples for each instruction in the SAM88RCRI
instruction set. Information is arranged in a consistent format for improved readability and for fast referencing. The
following information is included in each instruction description:
—Instruction name (mnemonic)
—Full instruction name
—Source/destination format of the instruction operand
—Shorthand notation of the instruction's operation
—Textual description of the instruction's effect
—Specific flag settings affected by the instruction
—Detailed description of the instruction's format, execution time, and addressing mode(s)
—Programming example(s) explaining how to use the instruction
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-11
ADC — Add with Carry
ADC dst,src
Operation: dst _ dst + src + c
The source operand, along with the setting of the carry flag, is added to the destination operand and
the sum is stored in the destination. The contents of the source are unaffected.
Two's-complement addition is performed. In multiple precision arithmetic, this instruction permits the
carry from the addition of low-order operands to be carried into the addition of high-order operands.
Flags: C: Set if there is a carry from the most significant bit of the result; cleared otherwise.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result is negative; cleared otherwise.
V: Set if arithmetic overflow occurs, that is, if both operands are of the same sign and the
result is of the opposite sign; cleared otherwise.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 4 12 r r
6 13 rlr
opc src dst 3 6 14 R R
6 15 RIR
opc dst src 3 6 16 RIM
Examples: Given: R1 = 10H, R2 = 03H, C flag = "1", register 01H = 20H, register 02H = 03H, and
register 03H = 0AH:
ADC R1,R2 ®R1 = 14H, R2 = 03H
ADC R1,@R2 ®R1 = 1BH, R2 = 03H
ADC 01H,02H ®Register 01H = 24H, register 02H = 03H
ADC 01H,@02H ®Register 01H = 2BH, register 02H = 03H
ADC 01H,#11H ®Register 01H = 32H
In the first example, destination register R1 contains the value 10H, the carry flag is set to "1", and
the source working register R2 contains the value 03H. The statement "ADC R1,R2" adds 03H and
the carry flag value ("1") to the destination value 10H, leaving 14H in register R1.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-12
ADD — Add
ADD dst,src
Operation: dst _ dst + src
The source operand is added to the destination operand and the sum is stored in the destination.
The contents of the source are unaffected. Two's-complement addition is performed.
Flags: C: Set if there is a carry from the most significant bit of the result; cleared otherwise.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result is negative; cleared otherwise.
V: Set if arithmetic overflow occurred, that is, if both operands are of the same sign and the result
is of the opposite sign; cleared otherwise.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 4 02 r r
6 03 rlr
opc src dst 3 6 04 R R
6 05 RIR
opc dst src 3 6 06 RIM
Examples: Given: R1 = 12H, R2 = 03H, register 01H = 21H, register 02H = 03H, register 03H = 0AH:
ADD R1,R2 ®R1 = 15H, R2 = 03H
ADD R1,@R2 ®R1 = 1CH, R2 = 03H
ADD 01H,02H ®Register 01H = 24H, register 02H = 03H
ADD 01H,@02H ®Register 01H = 2BH, register 02H = 03H
ADD 01H,#25H ®Register 01H = 46H
In the first example, destination working register R1 contains 12H and the source working register
R2 contains 03H. The statement "ADD R1,R2" adds 03H to 12H, leaving the value 15H in register
R1.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-13
AND — Logical AND
AND dst,src
Operation: dst _ dst AND src
The source operand is logically ANDed with the destination operand. The result is stored in the
destination. The AND operation results in a "1" bit being stored whenever the corresponding bits in
the two operands are both logic ones; otherwise a "0" bit value is stored. The contents of the source
are unaffected.
Flags: C: Unaffected.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result bit 7 is set; cleared otherwise.
V: Always cleared to "0".
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 4 52 r r
6 53 rlr
opc src dst 3 6 54 R R
6 55 RIR
opc dst src 3 6 56 RIM
Examples: Given: R1 = 12H, R2 = 03H, register 01H = 21H, register 02H = 03H, register 03H = 0AH:
AND R1,R2 ®R1 = 02H, R2 = 03H
AND R1,@R2 ®R1 = 02H, R2 = 03H
AND 01H,02H ®Register 01H = 01H, register 02H = 03H
AND 01H,@02H ®Register 01H = 00H, register 02H = 03H
AND 01H,#25H ®Register 01H = 21H
In the first example, destination working register R1 contains the value 12H and the source working
register R2 contains 03H. The statement "AND R1,R2" logically ANDs the source operand 03H with
the destination operand value 12H, leaving the value 02H in register R1.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-14
CALL — Call Procedure
CALL dst
Operation: SP ←SP – 1
@SP ←PCL
SP ←SP –1
@SP ←PCH
PC ←dst
The current contents of the program counter are pushed onto the top of the stack. The program
counter value used is the address of the first instruction following the CALL instruction. The specified
destination address is then loaded into the program counter and points to the first instruction of a
procedure. At the end of the procedure the return instruction (RET) can be used to return to the
original program flow. RET pops the top of the stack back into the program counter.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
opc dst 3 14 F6 DA
opc dst 2 12 F4 IRR
Examples: Given: R0 = 15H, R1 = 21H, PC = 1A47H, and SP = 0B2H:
CALL 1521H ®SP = 0B0H
(Memory locations 00H = 1AH, 01H = 4AH, where 4AH
is the address that follows the instruction.)
CALL @RR0 ®SP = 0B0H (00H = 1AH, 01H = 49H)
In the first example, if the program counter value is 1A47H and the stack pointer contains the value
0B2H, the statement "CALL 1521H" pushes the current PC value onto the top of the stack. The
stack pointer now points to memory location 00H. The PC is then loaded with the value 1521H, the
address of the first instruction in the program sequence to be executed.
If the contents of the program counter and stack pointer are the same as in the first example, the
statement "CALL @RR0" produces the same result except that the 49H is stored in stack location
01H (because the two-byte instruction format was used). The PC is then loaded with the value
1521H, the address of the first instruction in the program sequence to be executed.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-15
CCF — Complement Carry Flag
CCF
Operation: C _ NOT C
The carry flag (C) is complemented. If C = "1", the value of the carry flag is changed to logic zero; if
C = "0", the value of the carry flag is changed to logic one.
Flags: C: Complemented.
No other flags are affected.
Format:
Bytes Cycles Opcode
(Hex)
opc 1 4 EF
Example: Given: The carry flag = "0":
CCF
If the carry flag = "0", the CCF instruction complements it in the FLAGS register (0D5H), changing
its value from logic zero to logic one.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-16
CLR — Clear
CLR dst
Operation: dst _ "0"
The destination location is cleared to "0".
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
opc dst 2 4 B0 R
4B1 IR
Examples: Given: Register 00H = 4FH, register 01H = 02H, and register 02H = 5EH:
CLR 00H ®Register 00H = 00H
CLR @01H ®Register 01H = 02H, register 02H = 00H
In Register (R) addressing mode, the statement "CLR 00H" clears the destination register 00H
value to 00H. In the second example, the statement "CLR @01H" uses Indirect Register (IR)
addressing mode to clear the 02H register value to 00H.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-17
COM — Complement
COM dst
Operation: dst _ NOT dst
The contents of the destination location are complemented (one's complement); all "1s" are
changed to "0s", and vice-versa.
Flags: C: Unaffected.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result bit 7 is set; cleared otherwise.
V: Always reset to "0".
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
opc dst 2 4 60 R
4 61 IR
Examples: Given: R1 = 07H and register 07H = 0F1H:
COM R1 ®R1 = 0F8H
COM @R1 ®R1 = 07H, register 07H = 0EH
In the first example, destination working register R1 contains the value 07H (00000111B). The
statement "COM R1" complements all the bits in R1: all logic ones are changed to logic zeros, and
vice-versa, leaving the value 0F8H (11111000B).
In the second example, Indirect Register (IR) addressing mode is used to complement the value of
destination register 07H (11110001B), leaving the new value 0EH (00001110B).
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-18
CP — Compare
CP dst,src
Operation: dst – src
The source operand is compared to (subtracted from) the destination operand, and the appropriate
flags are set accordingly. The contents of both operands are unaffected by the comparison.
Flags: C: Set if a "borrow" occurred (src > dst); cleared otherwise.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result is negative; cleared otherwise.
V: Set if arithmetic overflow occurred, that is, if the operands were of opposite signs and the sign
of the result is of the same as the sign of the source operand; cleared otherwise.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 4 A2 r r
6A3 rlr
opc src dst 3 6 A4 R R
6A5 RIR
opc dst src 3 6 A6 RIM
Examples: 1. Given: R1 = 02H and R2 = 03H:
CP R1,R2 →Set the C and S flags
Destination working register R1 contains the value 02H and source register R2 contains the
value 03H. The statement "CP R1,R2" subtracts the R2 value (source/subtrahend) from the R1
value (destination/minuend). Because a "borrow" occurs and the difference is negative,
C and S are "1".
2. Given: R1 = 05H and R2 = 0AH:
CP R1,R2
JP UGE,SKIP
INC R1
SKIP LD R3,R1
In this example, destination working register R1 contains the value 05H which is less than the
contents of the source working register R2 (0AH). The statement "CP R1,R2" generates C =
"1" and the JP instruction does not jump to the SKIP location. After the statement "LD R3,R1"
executes, the value 06H remains in working register R3.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-19
DEC — Decrement
DEC dst
Operation: dst _ dst – 1
The contents of the destination operand are decremented by one.
Flags: C: Unaffected.
Z: Set if the result is "0"; cleared otherwise.
S: Set if result is negative; cleared otherwise.
V: Set if arithmetic overflow occurred, that is, dst value is – 128 (80H) and result value is
+ 127 (7FH); cleared otherwise.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
opc dst 2 4 00 R
4 01 IR
Examples: Given: R1 = 03H and register 03H = 10H:
DEC R1 ®R1 = 02H
DEC @R1 ®Register 03H = 0FH
In the first example, if working register R1 contains the value 03H, the statement "DEC R1"
decrements the hexadecimal value by one, leaving the value 02H. In the second example, the
statement "DEC @R1" decrements the value 10H contained in the destination register 03H by one,
leaving the value 0FH.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-20
DI — Disable Interrupts
DI
Operation: SYM (3) _ 0
Bit zero of the system mode register, SYM.3, is cleared to "0", globally disabling all interrupt
processing. Interrupt requests will continue to set their respective interrupt pending bits, but the
CPU will not service them while interrupt processing is disabled.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex)
opc 1 4 8F
Example: Given: SYM = 08H:
DI
If the value of the SYM register is 08H, the statement "DI" leaves the new value 00H in the register
and clears SYM.3 to "0", disabling interrupt processing.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-21
EI — Enable Interrupts
EI
Operation: SYM (3) _ 1
An EI instruction sets bit 3 of the system mode register, SYM.3 to "1". This allows interrupts to be
serviced as they occur. If an interrupt's pending bit was set while interrupt processing was disabled
(by executing a DI instruction), it will be serviced when you execute the EI instruction.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex)
opc 1 4 9F
Example: Given: SYM = 00H:
EI
If the SYM register contains the value 00H, that is, if interrupts are currently disabled, the statement
"EI" sets the SYM register to 08H, enabling all interrupts. (SYM.3 is the enable bit for global
interrupt processing.)
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-22
IDLE — Idle Operation
IDLE
Operation:
The IDLE instruction stops the CPU clock while allowing system clock oscillation to continue. Idle
mode can be released by an interrupt request (IRQ) or an external reset operation.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc 1 4 6F – –
Example: The instruction
IDLE
NOP
NOP
NOP
stops the CPU clock but not the system clock.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-23
INC — Increment
INC dst
Operation: dst _ dst + 1
The contents of the destination operand are incremented by one.
Flags: C: Unaffected.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result is negative; cleared otherwise.
V: Set if arithmetic overflow occurred, that is dst value is + 127 (7FH) and result is – 128 (80H);
cleared otherwise.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
dst | opc 1 4 rE r
r = 0 to F
opc dst 2 4 20 R
4 21 IR
Examples: Given: R0 = 1BH, register 00H = 0CH, and register 1BH = 0FH:
INC R0 ®R0 = 1CH
INC 00H ®Register 00H = 0DH
INC @R0 ®R0 = 1BH, register 01H = 10H
In the first example, if destination working register R0 contains the value 1BH, the statement "INC
R0" leaves the value 1CH in that same register.
The next example shows the effect an INC instruction has on register 00H, assuming that it
contains the value 0CH.
In the third example, INC is used in Indirect Register (IR) addressing mode to increment the value of
register 1BH from 0FH to 10H.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-24
IRET — Interrupt Return
IRET IRET
Operation: FLAGS _ @SP
SP _ SP + 1
PC _ @SP
SP _ SP + 2
SYM(2) _ 1
This instruction is used at the end of an interrupt service routine. It restores the flag register and the
program counter. It also re-enables global interrupts.
Flags: All flags are restored to their original settings (that is, the settings before the interrupt occurred).
Format:
IRET
(Normal) Bytes Cycles Opcode
(Hex)
opc 1 10 BF
12
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-25
JP — Jump
JP cc,dst (Conditional)
JP dst (Unconditional)
Operation: If cc is true, PC _ dst
The conditional JUMP instruction transfers program control to the destination address if the
condition specified by the condition code (cc) is true; otherwise, the instruction following the JP
instruction is executed. The unconditional JP simply replaces the contents of the PC with the
contents of the specified register pair. Control then passes to the statement addressed by the PC.
Flags: No flags are affected.
Format: (1)
(2) Bytes Cycles Opcode
(Hex) Addr Mode
dst
cc | opc dst 38ccD DA
cc = 0 to F
opc dst 2 8 30 IRR
NOTES:
1. The 3-byte format is used for a conditional jump and the 2-byte format for an unconditional jump.
2. In the first byte of the three-byte instruction format (conditional jump), the condition code and the
op code are both four bits.
Examples: Given: The carry flag (C) = "1", register 00 = 01H, and register 01 = 20H:
JP C,LABEL_W ®LABEL_W = 1000H, PC = 1000H
JP @00H ®PC = 0120H
The first example shows a conditional JP. Assuming that the carry flag is set to "1", the statement
"JP C,LABEL_W" replaces the contents of the PC with the value 1000H and transfers control to
that location. Had the carry flag not been set, control would then have passed to the statement
immediately following the JP instruction.
The second example shows an unconditional JP. The statement "JP @00" replaces the contents of
the PC with the contents of the register pair 00H and 01H, leaving the value 0120H.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-26
JR — Jump Relative
JR cc,dst
Operation: If cc is true, PC _ PC + dst
If the condition specified by the condition code (cc) is true, the relative address is added to the
program counter and control passes to the statement whose address is now in the program counter;
otherwise, the instruction following the JR instruction is executed (See list of condition codes).
The range of the relative address is + 127, – 128, and the original value of the program counter is
taken to be the address of the first instruction byte following the JR statement.
Flags: No flags are affected.
Format:
(note) Bytes Cycles Opcode
(Hex) Addr Mode
dst
cc | opc dst 26ccB RA
cc = 0 to F
NOTE:In the first byte of the two-byte instruction format, the condition code and the op code are each
four bits.
Example: Given: The carry flag = "1" and LABEL_X = 1FF7H:
JR C,LABEL_X ®PC = 1FF7H
If the carry flag is set (that is, if the condition code is true), the statement "JR C,LABEL_X" will
pass control to the statement whose address is now in the PC. Otherwise, the program instruction
following the JR would be executed.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-27
LD — Load
LD dst,src
Operation: dst _ src
The contents of the source are loaded into the destination. The source's contents are unaffected.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
dst | opc src 2 4 rC rIM
4r8 rR
src | opc dst 2 4 r9 Rr
r = 0 to F
opc dst | src 2 4 C7 rlr
4D7 Ir r
opc src dst 3 6 E4 R R
6E5 RIR
opc dst src 3 6 E6 RIM
6D6 IR IM
opc src dst 3 6 F5 IR R
opc dst | src x3 6 87 rx [r]
opc src | dst x3 6 97 x [r] r
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-28
LD — Load
LD (Continued)
Examples: Given: R0 = 01H, R1 = 0AH, register 00H = 01H, register 01H = 20H,
register 02H = 02H, LOOP = 30H, and register 3AH = 0FFH:
LD R0,#10H ®R0 = 10H
LD R0,01H ®R0 = 20H, register 01H = 20H
LD 01H,R0 ®Register 01H = 01H, R0 = 01H
LD R1,@R0 ®R1 = 20H, R0 = 01H
LD @R0,R1 ®R0 = 01H, R1 = 0AH, register 01H = 0AH
LD 00H,01H ®Register 00H = 20H, register 01H = 20H
LD 02H,@00H ®Register 02H = 20H, register 00H = 01H
LD 00H,#0AH ®Register 00H = 0AH
LD @00H,#10H ®Register 00H = 01H, register 01H = 10H
LD @00H,02H ®Register 00H = 01H, register 01H = 02, register 02H = 02H
LD R0,#LOOP[R1] ®R0 = 0FFH, R1 = 0AH
LD #LOOP[R0],R1 ®Register 31H = 0AH, R0 = 01H, R1 = 0AH
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-29
LDC/LDE — Load Memory
LDC/LDE dst,src
Operation: dst _ src
This instruction loads a byte from program or data memory into a working register or vice-versa. The
source values are unaffected. LDC refers to program memory and LDE to data memory. The
assembler makes "Irr" or "rr" values an even number for program memory and odd an odd number for
data memory.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
1. opc dst | src 2 10 C3 rIrr
2. opc src | dst 2 10 D3 Irr r
3. opc dst | src XS 3 12 E7 rXS [rr]
4. opc src | dst XS 3 12 F7 XS [rr] r
5. opc dst | src XLLXLH4 14 A7 rXL [rr]
6. opc src | dst XLLXLH4 14 B7 XL [rr] r
7. opc dst | 0000 DALDAH4 14 A7 rDA
8. opc src | 0000 DALDAH4 14 B7 DA r
9. opc dst | 0001 DALDAH4 14 A7 rDA
10. opc src | 0001 DALDAH4 14 B7 DA r
NOTES:
1. The source (src) or working register pair [rr] for formats 5 and 6 cannot use register pair 0–1.
2. For formats 3 and 4, the destination address "XS [rr]" and the source address "XS [rr]" are each one
byte.
3. For formats 5 and 6, the destination address "XL [rr]" and the source address "XL [rr]" are each two
bytes.
4. The DA and r source values for formats 7 and 8 are used to address program memory; the second set
of values, used in formats 9 and 10, are used to address data memory.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-30
LDC/LDE — Load Memory
LDC/LDE (Continued)
Examples: Given: R0 = 11H, R1 = 34H, R2 = 01H, R3 = 04H, R4 = 00H, R5 = 60H; Program memory
locations 0061 = AAH, 0103H = 4FH, 0104H = 1A, 0105H = 6DH, and 1104H = 88H.
External data memory locations 0061H = BBH, 0103H = 5FH, 0104H = 2AH, 0105H = 7DH,
and 1104H = 98H:
LDC R0,@RR2 ;R0 _ contents of program memory location 0104H
;R0 = 1AH, R2 = 01H, R3 = 04H
LDE R0,@RR2 ;R0 _ contents of external data memory location 0104H
;R0 = 2AH, R2 = 01H, R3 = 04H
LDC (note) @RR2,R0 ;11H (contents of R0) is loaded into program memory
;location 0104H (RR2),
;working registers R0, R2, R3 _ no change
LDE @RR2,R0 ;11H (contents of R0) is loaded into external data memory
;location 0104H (RR2),
;working registers R0, R2, R3 _ no change
LDC R0,#01H[RR4] ;R0 _ contents of program memory location 0061H
;(01H + RR4),
;R0 = AAH, R2 = 00H, R3 = 60H
LDE R0,#01H[RR4] ;R0 _ contents of external data memory location 0061H
;(01H + RR4), R0 = BBH, R4 = 00H, R5 = 60H
LDC (note) #01H[RR4],R0 ;11H (contents of R0) is loaded into program memory location
;0061H (01H + 0060H)
LDE #01H[RR4],R0 ;11H (contents of R0) is loaded into external data memory
;location 0061H (01H + 0060H)
LDC R0,#1000H[RR2] ;R0 _ contents of program memory location 1104H
;(1000H + 0104H), R0 = 88H, R2 = 01H, R3 = 04H
LDE R0,#1000H[RR2] ;R0 _ contents of external data memory location 1104H
;(1000H + 0104H), R0 = 98H, R2 = 01H, R3 = 04H
LDC R0,1104H ;R0 _ contents of program memory location 1104H, R0 = 88H
LDE R0,1104H ;R0 _ contents of external data memory location 1104H,
;R0 = 98H
LDC (note) 1105H,R0 ;11H (contents of R0) is loaded into program memory location
;1105H, (1105H) _ 11H
LDE 1105H,R0 ;11H (contents of R0) is loaded into external data memory
;location 1105H, (1105H) _ 11H
NOTE:These instructions are not supported by masked ROM type devices.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-31
LDCD/LDED — Load Memory and Decrement
LDCD/LDED dst,src
Operation: dst _ src
rr _ rr – 1
These instructions are used for user stacks or block transfers of data from program or data memory
to the register file. The address of the memory location is specified by a working register pair. The
contents of the source location are loaded into the destination location. The memory address is then
decremented. The contents of the source are unaffected.
LDCD references program memory and LDED references external data memory. The assembler
makes "Irr" an even number for program memory and an odd number for data memory.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 10 E2 rIrr
Examples: Given: R6 = 10H, R7 = 33H, R8 = 12H, program memory location 1033H = 0CDH, and
external data memory location 1033H = 0DDH:
LDCD R8,@RR6 ;0CDH (contents of program memory location 1033H) is loaded
;into R8 and RR6 is decremented by one
;R8 = 0CDH, R6 = 10H, R7 = 32H (RR6 _ RR6 – 1)
LDED R8,@RR6 ;0DDH (contents of data memory location 1033H) is loaded
;into R8 and RR6 is decremented by one (RR6 _ RR6 – 1)
;R8 = 0DDH, R6 = 10H, R7 = 32H
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-32
LDCI/LDEI — LOAD MEMORY AND INCREMENT
LDCI/LDEI dst,src
Operation: dst _ src
rr _ rr + 1
These instructions are used for user stacks or block transfers of data from program or data memory
to the register file. The address of the memory location is specified by a working register pair. The
contents of the source location are loaded into the destination location. The memory address is then
incremented automatically. The contents of the source are unaffected.
LDCI refers to program memory and LDEI refers to external data memory. The assembler makes
"Irr" even for program memory and odd for data memory.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 10 E3 rIrr
Examples: Given: R6 = 10H, R7 = 33H, R8 = 12H, program memory locations 1033H = 0CDH and
1034H = 0C5H; external data memory locations 1033H = 0DDH and 1034H = 0D5H:
LDCI R8,@RR6 ;0CDH (contents of program memory location 1033H) is loaded
;into R8 and RR6 is incremented by one (RR6 _ RR6 + 1)
;R8 = 0CDH, R6 = 10H, R7 = 34H
LDEI R8,@RR6 ;0DDH (contents of data memory location 1033H) is loaded
;into R8 and RR6 is incremented by one (RR6 _ RR6 + 1)
;R8 = 0DDH, R6 = 10H, R7 = 34H
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-33
NOP — No Operation
NOP
Operation: No action is performed when the CPU executes this instruction. Typically, one or more NOPs are
executed in sequence in order to effect a timing delay of variable duration.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex)
opc 1 4 FF
Example: When the instruction
NOP
is encountered in a program, no operation occurs. Instead, there is a delay in instruction execution
time.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-34
OR — Logical OR
OR dst,src
Operation: dst _ dst OR src
The source operand is logically ORed with the destination operand and the result is stored in the
destination. The contents of the source are unaffected. The OR operation results in a "1" being
stored whenever either of the corresponding bits in the two operands is a "1"; otherwise a "0" is
stored.
Flags: C: Unaffected.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result bit 7 is set; cleared otherwise.
V: Always cleared to "0".
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 4 42 r r
6 43 rlr
opc src dst 3 6 44 R R
6 45 RIR
opc dst src 3 6 46 RIM
Examples: Given: R0 = 15H, R1 = 2AH, R2 = 01H, register 00H = 08H, register 01H = 37H, and
register 08H = 8AH:
OR R0,R1 ®R0 = 3FH, R1 = 2AH
OR R0,@R2 ®R0 = 37H, R2 = 01H, register 01H = 37H
OR 00H,01H ®Register 00H = 3FH, register 01H = 37H
OR 01H,@00H ®Register 00H = 08H, register 01H = 0BFH
OR 00H,#02H ®Register 00H = 0AH
In the first example, if working register R0 contains the value 15H and register R1 the value 2AH, the
statement "OR R0,R1" logical-ORs the R0 and R1 register contents and stores the result (3FH) in
destination register R0.
The other examples show the use of the logical OR instruction with the various addressing modes
and formats.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-35
POP — Pop From Stack
POP dst
Operation: dst _ @SP
SP _ SP + 1
The contents of the location addressed by the stack pointer are loaded into the destination. The
stack pointer is then incremented by one.
Flags: No flags affected.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
opc dst 2 8 50 R
8 51 IR
Examples: Given: Register 00H = 01H, register 01H = 1BH, SP (0D9H) = 0BBH, and stack register 0BBH
= 55H:
POP 00H ®Register 00H = 55H, SP = 0BCH
POP @00H ®Register 00H = 01H, register 01H = 55H, SP = 0BCH
In the first example, general register 00H contains the value 01H. The statement "POP 00H" loads
the contents of location 0BBH (55H) into destination register 00H and then increments the stack
pointer by one. Register 00H then contains the value 55H and the SP points to location 0BCH.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-36
PUSH — Push To Stack
PUSH src
Operation: SP _ SP – 1
@SP _ src
A PUSH instruction decrements the stack pointer value and loads the contents of the source (src)
into the location addressed by the decremented stack pointer. The operation then adds the new
value to the top of the stack.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
opc src 2 8 70 R
8 71 IR
Examples: Given: Register 40H = 4FH, register 4FH = 0AAH, SP = 0C0H:
PUSH 40H ®Register 40H = 4FH, stack register 0BFH = 4FH,
SP = 0BFH
PUSH @40H ®Register 40H = 4FH, register 4FH = 0AAH, stack register
0BFH = 0AAH, SP = 0BFH
In the first example, if the stack pointer contains the value 0C0H, and general register 40H the value
4FH, the statement "PUSH 40H" decrements the stack pointer from 0C0 to 0BFH. It then loads the
contents of register 40H into location 0BFH. Register 0BFH then contains the value 4FH and SP
points to location 0BFH.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-37
RCF — Reset Carry Flag
RCF RCF
Operation: C _ 0
The carry flag is cleared to logic zero, regardless of its previous value.
Flags: C: Cleared to "0".
No other flags are affected.
Format:
Bytes Cycles Opcode
(Hex)
opc 1 4 CF
Example: Given: C = "1" or "0":
The instruction RCF clears the carry flag (C) to logic zero.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-38
RET — Return
RET
Operation: PC _ @SP
SP _ SP + 2
The RET instruction is normally used to return to the previously executing procedure at the end of a
procedure entered by a CALL instruction. The contents of the location addressed by the stack
pointer are popped into the program counter. The next statement that is executed is the one that is
addressed by the new program counter value.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex)
opc 1 8 AF
10
Example: Given: SP = 0BCH, (SP) = 101AH, and PC = 1234:
RET ®PC = 101AH, SP = 0BEH
The statement "RET" pops the contents of stack pointer location 0BCH (10H) into the high byte of
the program counter. The stack pointer then pops the value in location 0BDH (1AH) into the PC's
low byte and the instruction at location 101AH is executed. The stack pointer now points to memory
location 0BEH.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-39
RL — Rotate Left
RL dst
Operation: C _ dst (7)
dst (0) _ dst (7)
dst (n + 1) _ dst (n), n = 0–6
The contents of the destination operand are rotated left one bit position. The initial value of bit 7 is
moved to the bit zero (LSB) position and also replaces the carry flag.
C7 0
Flags: C: Set if the bit rotated from the most significant bit position (bit 7) was "1".
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result bit 7 is set; cleared otherwise.
V: Set if arithmetic overflow occurred, that is, if the sign of the destination changed during
rotation; cleared otherwise.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
opc dst 2 4 90 R
4 91 IR
Examples: Given: Register 00H = 0AAH, register 01H = 02H and register 02H = 17H:
RL 00H ®Register 00H = 55H, C = "1"
RL @01H ®Register 01H = 02H, register 02H = 2EH, C = "0"
In the first example, if general register 00H contains the value 0AAH (10101010B), the statement
"RL 00H" rotates the 0AAH value left one bit position, leaving the new value 55H (01010101B) and
setting the carry and overflow flags.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-40
RLC — Rotate Left Through Carry
RLC dst
Operation: dst (0) _ C
C _ dst (7)
dst (n + 1) _ dst (n), n = 0–6
The contents of the destination operand with the carry flag are rotated left one bit position. The initial
value of bit 7 replaces the carry flag (C); the initial value of the carry flag replaces bit zero.
C7 0
Flags: C: Set if the bit rotated from the most significant bit position (bit 7) was "1".
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result bit 7 is set; cleared otherwise.
V: Set if arithmetic overflow occurred, that is, if the sign of the destination changed during
rotation; cleared otherwise.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
opc dst 2 4 10 R
4 11 IR
Examples: Given: Register 00H = 0AAH, register 01H = 02H, and register 02H = 17H, C = "0":
RLC 00H ®Register 00H = 54H, C = "1"
RLC @01H ®Register 01H = 02H, register 02H = 2EH, C = "0"
In the first example, if general register 00H has the value 0AAH (10101010B), the statement "RLC
00H" rotates 0AAH one bit position to the left. The initial value of bit 7 sets the carry flag and the
initial value of the C flag replaces bit zero of register 00H, leaving the value 55H (01010101B). The
MSB of register 00H resets the carry flag to "1" and sets the overflow flag.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-41
RR — Rotate Right
RR dst
Operation: C _ dst (0)
dst (7) _ dst (0)
dst (n) _ dst (n + 1), n = 0–6
The contents of the destination operand are rotated right one bit position. The initial value of bit zero
(LSB) is moved to bit 7 (MSB) and also replaces the carry flag (C).
C7 0
Flags: C: Set if the bit rotated from the least significant bit position (bit zero) was "1".
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result bit 7 is set; cleared otherwise.
V: Set if arithmetic overflow occurred, that is, if the sign of the destination changed during
rotation; cleared otherwise.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
opc dst 2 4 E0 R
4E1 IR
Examples: Given: Register 00H = 31H, register 01H = 02H, and register 02H = 17H:
RR 00H ®Register 00H = 98H, C = "1"
RR @01H ®Register 01H = 02H, register 02H = 8BH, C = "1"
In the first example, if general register 00H contains the value 31H (00110001B), the statement "RR
00H" rotates this value one bit position to the right. The initial value of bit zero is moved to bit 7,
leaving the new value 98H (10011000B) in the destination register. The initial bit zero also resets the
C flag to "1" and the sign flag and overflow flag are also set to "1".
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-42
RRC — Rotate Right Through Carry
RRC dst
Operation: dst (7) _ C
C _ dst (0)
dst (n) _ dst (n + 1), n = 0–6
The contents of the destination operand and the carry flag are rotated right one bit position. The
initial value of bit zero (LSB) replaces the carry flag; the initial value of the carry flag replaces bit 7
(MSB).
C7 0
Flags: C: Set if the bit rotated from the least significant bit position (bit zero) was "1".
Z: Set if the result is "0" cleared otherwise.
S: Set if the result bit 7 is set; cleared otherwise.
V: Set if arithmetic overflow occurred, that is, if the sign of the destination changed during
rotation; cleared otherwise.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
opc dst 2 4 C0 R
4C1 IR
Examples: Given: Register 00H = 55H, register 01H = 02H, register 02H = 17H, and C = "0":
RRC 00H ®Register 00H = 2AH, C = "1"
RRC @01H ®Register 01H = 02H, register 02H = 0BH, C = "1"
In the first example, if general register 00H contains the value 55H (01010101B), the statement
"RRC 00H" rotates this value one bit position to the right. The initial value of bit zero ("1") replaces
the carry flag and the initial value of the C flag ("1") replaces bit 7. This leaves the new value 2AH
(00101010B) in destination register 00H. The sign flag and overflow flag are both cleared to "0".
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-43
SBC — Subtract With Carry
SBC dst,src
Operation: dst _ dst – src – c
The source operand, along with the current value of the carry flag, is subtracted from the destination
operand and the result is stored in the destination. The contents of the source are unaffected.
Subtraction is performed by adding the two's-complement of the source operand to the destination
operand. In multiple precision arithmetic, this instruction permits the carry ("borrow") from the
subtraction of the low-order operands to be subtracted from the subtraction of high-order operands.
Flags: C: Set if a borrow occurred (src > dst); cleared otherwise.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result is negative; cleared otherwise.
V: Set if arithmetic overflow occurred, that is, if the operands were of opposite sign and the sign
of the result is the same as the sign of the source; cleared otherwise.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 4 32 r r
6 33 rlr
opc src dst 3 6 34 R R
6 35 RIR
opc dst src 3 6 36 RIM
Examples: Given: R1 = 10H, R2 = 03H, C = "1", register 01H = 20H, register 02H = 03H, and register
03H = 0AH:
SBC R1,R2 ®R1 = 0CH, R2 = 03H
SBC R1,@R2 ®R1 = 05H, R2 = 03H, register 03H = 0AH
SBC 01H,02H ®Register 01H = 1CH, register 02H = 03H
SBC 01H,@02H ®Register 01H = 15H,register 02H = 03H, register 03H = 0AH
SBC 01H,#8AH ®Register 01H = 95H; C, S, and V = "1"
In the first example, if working register R1 contains the value 10H and register R2 the value 03H, the
statement "SBC R1,R2" subtracts the source value (03H) and the C flag value ("1") from the
destination (10H) and then stores the result (0CH) in register R1.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-44
SCF — Set Carry Flag
SCF
Operation: C _ 1
The carry flag (C) is set to logic one, regardless of its previous value.
Flags: C: Set to "1".
No other flags are affected.
Format:
Bytes Cycles Opcode
(Hex)
opc 1 4 DF
Example: The statement
SCF
sets the carry flag to logic one.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-45
SRA — Shift Right Arithmetic
SRA dst
Operation: dst (7) _ dst (7)
C _ dst (0)
dst (n) _ dst (n + 1), n = 0–6
An arithmetic shift-right of one bit position is performed on the destination operand. Bit zero (the
LSB) replaces the carry flag. The value of bit 7 (the sign bit) is unchanged and is shifted into bit
position 6.
C7 06
Flags: C: Set if the bit shifted from the LSB position (bit zero) was "1".
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result is negative; cleared otherwise.
V: Always cleared to "0".
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst
opc dst 2 4 D0 R
4D1 IR
Examples: Given: Register 00H = 9AH, register 02H = 03H, register 03H = 0BCH, and C = "1":
SRA 00H ®Register 00H = 0CD, C = "0"
SRA @02H ®Register 02H = 03H, register 03H = 0DEH, C = "0"
In the first example, if general register 00H contains the value 9AH (10011010B), the statement
"SRA 00H" shifts the bit values in register 00H right one bit position. Bit zero ("0") clears the C flag
and bit 7 ("1") is then shifted into the bit 6 position (bit 7 remains unchanged). This leaves the value
0CDH (11001101B) in destination register 00H.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-46
STOP — Stop Operation
STOP
Operation: The STOP instruction stops the both the CPU clock and system clock and causes the
microcontroller to enter Stop mode. During Stop mode, the contents of on-chip CPU registers,
peripheral registers, and I/O port control and data registers are retained. Stop mode can be released
by an external reset operation or External interrupt input. For the reset operation, the RESET pin
must be held to Low level until the required oscillation stabilization interval has elapsed.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc 1 4 7F – –
Example: The statement
LD STOPCON, #0A5H
STOP
NOP
NOP
NOP
halts all microcontroller operations. When STOPCON register is not #0A5H value, if you use STOP
instruction, PC is changed to reset address.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-47
SUB — Subtract
SUB dst,src
Operation: dst _ dst – src
The source operand is subtracted from the destination operand and the result is stored in the
destination. The contents of the source are unaffected. Subtraction is performed by adding the two's
complement of the source operand to the destination operand.
Flags: C: Set if a "borrow" occurred; cleared otherwise.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result is negative; cleared otherwise.
V: Set if arithmetic overflow occurred, that is, if the operands were of opposite signs and the sign
of the result is of the same as the sign of the source operand; cleared otherwise.
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 4 22 r r
6 23 rlr
opc src dst 3 6 24 R R
6 25 RIR
opc dst src 3 6 26 RIM
Examples: Given: R1 = 12H, R2 = 03H, register 01H = 21H, register 02H = 03H, register 03H = 0AH:
SUB R1,R2 ®R1 = 0FH, R2 = 03H
SUB R1,@R2 ®R1 = 08H, R2 = 03H
SUB 01H,02H ®Register 01H = 1EH, register 02H = 03H
SUB 01H,@02H ®Register 01H = 17H, register 02H = 03H
SUB 01H,#90H ®Register 01H = 91H; C, S, and V = "1"
SUB 01H,#65H ®Register 01H = 0BCH; C and S = "1", V = "0"
In the first example, if working register R1 contains the value 12H and if register R2 contains the
value 03H, the statement "SUB R1,R2" subtracts the source value (03H) from the destination value
(12H) and stores the result (0FH) in destination register R1.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-48
TCM — Test Complement Under Mask
TCM dst,src
Operation: (NOT dst) AND src
This instruction tests selected bits in the destination operand for a logic one value. The bits to be
tested are specified by setting a "1" bit in the corresponding position of the source operand (mask).
The TCM statement complements the destination operand, which is then ANDed with the source
mask. The zero (Z) flag can then be checked to determine the result. The destination and source
operands are unaffected.
Flags: C: Unaffected.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result bit 7 is set; cleared otherwise.
V: Always cleared to "0".
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 4 62 r r
6 63 rlr
opc src dst 3 6 64 R R
6 65 RIR
opc dst src 3 6 66 RIM
Examples: Given: R0 = 0C7H, R1 = 02H, R2 = 12H, register 00H = 2BH, register 01H = 02H, and
register 02H = 23H:
TCM R0,R1 ®R0 = 0C7H, R1 = 02H, Z = "1"
TCM R0,@R1 ®R0 = 0C7H, R1 = 02H, register 02H = 23H, Z = "0"
TCM 00H,01H ®Register 00H = 2BH, register 01H = 02H, Z = "1"
TCM 00H,@01H ®Register 00H = 2BH, register 01H = 02H,
register 02H = 23H, Z = "1"
TCM 00H,#34 ®Register 00H = 2BH, Z = "0"
In the first example, if working register R0 contains the value 0C7H (11000111B) and register R1 the
value 02H (00000010B), the statement "TCM R0,R1" tests bit one in the destination register for a
"1" value. Because the mask value corresponds to the test bit, the Z flag is set to logic one and can
be tested to determine the result of the TCM operation.
S3C9484/C9488/F9488 SAM88RCRI INSTRUCTION SET
6-49
TM — Test Under Mask
TM dst,src
Operation: dst AND src
This instruction tests selected bits in the destination operand for a logic zero value. The bits to be
tested are specified by setting a "1" bit in the corresponding position of the source operand (mask),
which is ANDed with the destination operand. The zero (Z) flag can then be checked to determine
the result. The destination and source operands are unaffected.
Flags: C: Unaffected.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result bit 7 is set; cleared otherwise.
V: Always reset to "0".
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 4 72 r r
6 73 rlr
opc src dst 3 6 74 R R
6 75 RIR
opc dst src 3 6 76 RIM
Examples: Given: R0 = 0C7H, R1 = 02H, R2 = 18H, register 00H = 2BH, register 01H = 02H, and
register 02H = 23H:
TM R0,R1 ®R0 = 0C7H, R1 = 02H, Z = "0"
TM R0,@R1 ®R0 = 0C7H, R1 = 02H, register 02H = 23H, Z = "0"
TM 00H,01H ®Register 00H = 2BH, register 01H = 02H, Z = "0"
TM 00H,@01H ®Register 00H = 2BH, register 01H = 02H,
register 02H = 23H, Z = "0"
TM 00H,#54H ®Register 00H = 2BH, Z = "1"
In the first example, if working register R0 contains the value 0C7H (11000111B) and register R1 the
value 02H (00000010B), the statement "TM R0,R1" tests bit one in the destination register for a "0"
value. Because the mask value does not match the test bit, the Z flag is cleared to logic zero and
can be tested to determine the result of the TM operation.
SAM88RCRI INSTRUCTION SET S3C9484/C9488/F9488
6-50
XOR — Logical Exclusive OR
XOR dst,src
Operation: dst _ dst XOR src
The source operand is logically exclusive-ORed with the destination operand and the result is stored
in the destination. The exclusive-OR operation results in a "1" bit being stored whenever the
corresponding bits in the operands are different; otherwise, a "0" bit is stored.
Flags: C: Unaffected.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result bit 7 is set; cleared otherwise.
V: Always reset to "0".
Format:
Bytes Cycles Opcode
(Hex) Addr Mode
dst src
opc dst | src 2 4 B2 r r
6B3 rlr
opc src dst 3 6 B4 R R
6B5 RIR
opc dst src 3 6 B6 RIM
Examples: Given: R0 = 0C7H, R1 = 02H, R2 = 18H, register 00H = 2BH, register 01H = 02H, and
register 02H = 23H:
XOR R0,R1 ®R0 = 0C5H, R1 = 02H
XOR R0,@R1 ®R0 = 0E4H, R1 = 02H, register 02H = 23H
XOR 00H,01H ®Register 00H = 29H, register 01H = 02H
XOR 00H,@01H ®Register 00H = 08H, register 01H = 02H, register 02H = 23H
XOR 00H,#54H ®Register 00H = 7FH
In the first example, if working register R0 contains the value 0C7H and if register R1 contains the
value 02H, the statement "XOR R0,R1" logically exclusive-ORs the R1 value with the R0 value and
stores the result (0C5H) in the destination register R0.
S3C9484/C9488/F9488 CLOCK CIRCUIT
7-1
7CLOCK CIRCUIT
OVERVIEW
The clock frequency generation for the S3C9484/C9488/F9488 by an external crystal can range from 1 MHz to 8
MHz. The maximum CPU clock frequency is 8 MHz. The XIN and XOUT pins connect the external oscillator or clock
source to the on-chip clock circuit.
SYSTEM CLOCK CIRCUIT
The system clock circuit has the following components:
—External crystal or ceramic resonator oscillation source (or an external clock source)
—Oscillator stop and wake-up functions
—Programmable frequency divider for the CPU clock (fxx divided by 1, 2, 8, or 16)
—System clock control register, CLKCON
—Oscillator control register, OSCCON and STOP control register, STPCON
X
IN
X
OUT
C1
C2
S3C9484/
C9488/F9488
Figure 7-1. Main Oscillator Circuit
(Crystal or Ceramic Oscillator)
X
IN
X
OUT
S3C9484/
C9488/F9488
Figure 7-2. Main Oscillator Circuit
(RC Oscillator)
CLOCK CIRCUIT S3C9484/C9488/F9488
7-2
CLOCK STATUS DURING POWER-DOWN MODES
The two power-down modes, Stop mode and Idle mode, affect the system clock as follows:
—In Stop mode, the main oscillator is halted. Stop mode is released, and the oscillator started, by a reset
operation or an external interrupt (with RC delay noise filter), and can be released by internal interrupt too when
the sub-system oscillator is running and watch timer is operating with sub-system clock.
—In Idle mode, the internal clock signal is gated to the CPU, but not to interrupt structure, timers and timer/
counters. Idle mode is released by a reset or by an external or internal interrupt.
Stop Release
fxfxt
Stop
Sub-system
Oscillator
Circuit
STOP
OSC inst.
fXX
CPU
Stop
Watch Timer
Timer/Counter
Watch Timer (fxx/128)
LCD Controller
A/D Converter
INT
Selector 1
Selector 2
1/8-1/4096
Frequency
Dividing
Circuit
Basic Timer
1/2 1/8 1/161/1
OSCCON.0
STPCON
CLKCON.4-.3
Idle
Main-System
Oscillator
Circuit
OSCCON.3
OSCCON.2
Figure 7-3. System Clock Circuit Diagram
S3C9484/C9488/F9488 CLOCK CIRCUIT
7-3
SYSTEM CLOCK CONTROL REGISTER (CLKCON)
The system clock control register, CLKCON, is located at address D4H. It is read/write addressable and has the
following functions:
—Oscillator frequency divide-by value
After the main oscillator is activated, and the fxx/16 (the slowest clock speed) is selected as the CPU clock. If
necessary, you can then increase the CPU clock speed to fxx/8, fxx/2, or fxx/1.
System Clock Control Register (CLKCON)
D4H, R/W
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Not used Not used
Divide-by selection bits for
CPU clock frequency:
00 = fxx/16
01 = fxx/8
10 = fxx/2
11 = fxx/1 (non-divided)
Oscillator IRQ Wake-up
Function Enable Bit:
0 = Enable IRQ for main system
oscillator wake-up function
1 = Disable IRQ for main system
oscillator wake-up function
Figure 7-4. System Clock Control Register (CLKCON)
MAIN/SUBSYSTEM OSCILLATOR SELECTION (OSCCON)
When a main oscillator is selected, users cannot stop operating of a main oscillator by handling the OSCCON
register but sub oscillator can be stopped. If users intend to stop operating of a main oscillator users must use
"STOP" instruction.
When a sub oscillator is selected, users must do the contrary of the above case.
NOTE:If a sub oscillator is not used, users must connect it to Vss.
CLOCK CIRCUIT S3C9484/C9488/F9488
7-4
Oscillator Control Register (OSCCON)
D6H, R/W
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Not used System clock selection bit:
0 = Mainsystem oscillator select
1 = Subsystem oscillator select
Subsystem oscillator control bit:
0 = Subsystem oscillator RUN
1 = Subsystem oscillator STOP
Mainsystem oscillator control bit:
0 = Mainsystem oscillator RUN
1 = Mainsystem oscillator STOP
NOTE:
When the CPU is operated with fxt (sub-oscillation clock), it is possible to use the stop
instruction but in this case before using stop instruction,
you must select fxx/128 for basic
timer counter input clock
. Then the oscillation stabilization time is 62.5 ((1/32768) x 128 x 16) ms.
Here the warm-up time is from the stop release signal activates until the basic timer counter
counting start. So the totaly needed oscillation stabilization time will be less than 162.5 ms.
Not used
Figure 7-5. Oscillator Control Register (OSCCON)
STOP Control Register (STPCON)
D7H, R/W
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
STOP Control bits:
Other values = Disable STOP instruction
10100101 = Enable STOP instruction
Figure 7-6. STOP Control Register (STPCON)
S3C9484/C9488/F9488 RESET and POWER-DOWN
8-1
8RESET and POWER-DOWN
SYSTEM RESET
OVERVIEW
During a power-on reset, the voltage at VDD goes to High level and the RESET pin is forced to Low level. The RESET
signal is input through a Schmitt trigger circuit where it is then synchronized with the CPU clock. This procedure
brings S3C9484/C9488/F9488 into a known operating status.
To allow time for internal CPU clock oscillation to stabilize, the RESET pin must be held to Low level for a minimum
time interval after the power supply comes within tolerance. The minimum required oscillation stabilization time for a
reset operation is 1millisecond.
Whenever a reset occurs during normal operation (that is, when both VDD and RESET are High level), the RESET
pin is forced Low and the reset operation starts. All system and peripheral control registers are then reset to their
default hardware values.
In summary, the following sequence of events occurs during a reset operation:
—Interrupt is disabled.
—The watchdog function is enabled.
—Ports 0-4 are set to input mode. (except P0.0-2, P3.3-6)
—Peripheral control and data registers are disabled and reset to their default hardware values.
—The program counter (PC) is loaded with the program reset address in the ROM, 0100H.
—When the programmed oscillation stabilization time interval has elapsed, the instruction stored in ROM location
0100H (and 0101H) is fetched and executed.
NORMAL MODE RESET OPERATION
In normal (masked ROM) mode, the Test pin is tied to VSS. A reset enables access to the 4/8-Kbyte on-chip ROM.
(The external interface is not automatically configured).
NOTE
To program the duration of the oscillation stabilization interval, you make the appropriate settings to the
basic timer control register, BTCON, before entering Stop mode. Also, if you do not want to use the
watchdog timer function (which causes a system reset if a watchdog timer counter overflow occurs), you
can disable it by writing '1010B' to the upper nibble of WDTCON.
RESET and POWER-DOWN S3C9484/C9488/F9488
8-2
HARDWARE RESET VALUES
The reset values for CPU and system registers, peripheral control registers, and peripheral data registers following a
reset operation. The following notation is used to represent reset values:
—A "1" or a "0" shows the reset bit value as logic one or logic zero, respectively.
—An "x" means that the bit value is undefined after a reset.
—A dash ("–") means that the bit is either not used or not mapped, but read 0 is the bit value.
Table 8-1. S3C9484/C9488/F9488 Register Values after RESET
Register Name Mnemonic Address Bit Values After RESET
Dec Hex 76543210
LCD control register LCDCON 208 D0H 0–000000
LCD drive voltage control register LCDVOL 209 D1H 0–––0000
Port 0 pull-up resistor control register P0PUR 210 D2H 11111111
Port 1 pull-up resistor control register P1PUR 211 D3H 11111111
System Clock control register CLKCON 212 D4H 0––00–––
System flags register FLAGS 213 D5H xxxx––––
Oscillator control register OSCCON 214 D6H ––––00–0
STOP control register STPCON 215 D7H 00000000
Voltage Level Detector control register VLDCON 216 D8H –0101100
Stack pointer register SP 217 D9H xxxxxxxx
Location DAH-DBH are not mapped
Basic timer control register BTCON 220 DCH ––––0000
Basic timer counter register BTCNT 221 DDH 00000000
Location DEH is not mapped
System mode register SYM 223 DFH ––––0000
Port 0 Data Register P0 224 E0H 00000000
Port 1 Data Register P1 225 E1H 00000000
Port 2 Data Register P2 226 E2H 00000000
Port 3 Data Register P3 227 E3H 00000000
Port 4 Data Register P4 228 E4H 00000000
Watchdog timer control register WDTCON 229 E5H 00000000
Port 0 control High register P0CONH 230 E6H 00000000
Port 0 control Low register P0CONL 231 E7H 00000000
Port 1 control High register P1CONH 232 E8H 00000000
Port 1 control Low register P1CONL 233 E9H 00000000
S3C9484/C9488/F9488 RESET and POWER-DOWN
8-3
Table 8-1. S3C9484/C9488/F9488 Registers Values after RESET (continued)
Register Name Mnemonic Address Bit Values After RESET
Dec Hex 76543210
Port 2 control High register P2CONH 234 EAH 00000000
Port 2 control Low register P2CONL 235 EBH 00000000
Port 3 control High register P3CONH 236 ECH SSSSSSSS
Port 3 control Low register P3CONL 237 EDH 00000000
Port 3 interrupt control register P3INT 238 EEH 00000000
Port 3 interrupt pending register P3PND 239 EFH ––––0000
Port 4 control High register P4CONH 240 F0H ––000000
Port 4 control Low register P4CONL 241 F1H 00000000
Timer A/B interrupt pending register TINTPND 242 F2H –––––000
Timer A control register TACON 243 F3H 00000000
Timer A counter register TACNT 244 F4H 00000000
Timer A data register TADATA 245 F5H 11111111
Timer B data register(high byte) TBDATAH 246 F6H 11111111
Timer B data register(low byte) TBDATAL 247 F7H 11111111
Timer B control register TBCON 248 F8H 00000000
Watch timer control register WTCON 249 F9H 00000000
A/D converter data register(high byte) ADDATAH 250 FAH ––––––0 0
A/D converter data register(low byte) ADDATAL 251 FBH 00000000
A/D converter control register ADCON 252 FCH 00000000
UART control register UARTCON 253 FDH 00000000
UART pending register UARTPND 254 FEH ––00––0 0
UART data register UDATA 255 FFH xxxxxxxx
Table 8-2. S3C9484/C9488/F9488 Registers Values after RESET (page 1)
Register Name Mnemonic Address Bit Values After RESET
Dec Hex 76543210
UART baud rate data register(high byte) BRDATAH 20 14H 11111111
UART baud rate data register(low byte) BRDATAL 21 15H 11111111
NOTE: –: Not mapped or not used, x: Undefined, S: be set by Smart option.
RESET and POWER-DOWN S3C9484/C9488/F9488
8-4
POWER-DOWN MODES
STOP MODE
Stop mode is invoked by the instruction STOP (opcode 7FH). In Stop mode, the operation of the CPU and all
peripherals is halted. That is, the on-chip main oscillator stops and the supply current is reduced to less than 3 µA.
All system functions stop when the clock "freezes," but data stored in the internal register file is retained. Stop
mode can be released in one of two ways: by a reset or by interrupts.
NOTE
Do not use stop mode if you are using an external clock source because XIN input must be restricted
internally to VSS to reduce current leakage.
Using RESET to Release Stop Mode
Stop mode is released when the RESET signal is released and returns to high level: all system and peripheral
control registers are reset to their default hardware values and the contents of all data registers are retained. A reset
operation automatically selects a slow clock (1/16) because CLKCON.3 and CLKCON.4 are cleared to '00B'. After
the programmed oscillation stabilization interval has elapsed, the CPU starts the system initialization routine by
fetching the program instruction stored in ROM location 0100H (and 0101H).
Using an External Interrupt to Release Stop Mode
External interrupts with an RC-delay noise filter circuit can be used to release Stop mode. Which interrupt you can
use to release Stop mode in a given situation depends on the microcontroller's current internal operating mode. The
external interrupts in the S3C9484/C9488/F9488 interrupt structure that can be used to release Stop mode are:
—External interrupts P3.3-P3.6 (INT0-INT3)
Please note the following conditions for Stop mode release:
—If you release Stop mode using an external interrupt, the current values in system and peripheral control
registers are unchanged except STPCON register.
—If you use an external interrupt for Stop mode release, you can also program the duration of the oscillation
stabilization interval. To do this, you must make the appropriate control and clock settings before entering Stop
mode.
—When the Stop mode is released by external interrupt, the CLKCON.4 and CLKCON.3 bit-pair setting remains
unchanged and the currently selected clock value is used.
—The external interrupt is serviced when the Stop mode release occurs. Following the IRET from the service
routine, the instruction immediately following the one that initiated Stop mode is executed.
Using an internal Interrupt to Release Stop Mode
If you use Watch Timer with sub oscillator, STOP mode is released by WATCH TIMER interrupt.
How to enter into stop mode
Handling STPCON register then writing STOP instruction. (Keep the order)
S3C9484/C9488/F9488 RESET and POWER-DOWN
8-5
Attentions of Using Stop Mode
If you use 42-pin Package, you must set P0.3- P0.4 for output mode and must set out value on low.
And If you use 32-pin Package, you must set P4.0- P4.6/P0.3- P0.7 for output mode and must set out value to low
to prevent the leaky current in stop mode.
IDLE MODE
Idle mode is invoked by the instruction IDLE (opcode 6FH). In idle mode, CPU operations are halted while some
peripherals remain active. During idle mode, the internal clock signal is gated away from the CPU, but all peripherals
timers remain active. Port pins retain the mode (input or output) they had at the time idle mode was entered.
There are two ways to release idle mode:
1. Execute a reset. All system and peripheral control registers are reset to their default values and the contents of
all data registers are retained. The reset automatically selects the slow clock fxx/16 because CLKCON.4 and
CLKCON.3 are cleared to ‘00B’. If interrupts are masked, a reset is the only way to release idle mode.
2. Activate any enabled interrupt, causing idle mode to be released. When you use an interrupt to release idle
mode, the CLKCON.4 and CLKCON.3 register values remain unchanged, and the currently selected clock value
is used. The interrupt is then serviced. When the return-from-interrupt (IRET) occurs, the instruction immediately
following the one that initiated idle mode is executed.
RESET and POWER-DOWN S3C9484/C9488/F9488
8-6
NOTES
S3C9484/C9488/F9488 I/O PORTS
9-1
9I/O PORTS
OVERVIEW
The S3C9484/C9488/F9488 microcontroller has five bit-programmable I/O ports, P0-P4. The port 3 and 4 are 7-bit
ports and the others are 8-bit ports. This gives a total of 38 I/O pins. Each port can be flexibly configured to meet
application design requirements. The CPU accesses ports by directly writing or reading port registers. No special I/O
instructions are required.
Table 9-1 gives you a general overview of the S3C9484/C9488/F9488 I/O port functions.
Table 9-1. S3C9484/C9488/F9488 Port Configuration Overview
Port Configuration Options
0I/O port with bit-programmable pins. Configurable to input or push-pull output mode. Pull-up resistors
can be assigned by software. Pins can also be assigned individually as alternative function pins.
1I/O port with bit-programmable pins. Configurable to input or push-pull output mode. Pull-up resistors
can be assigned by software. Pins can also be assigned individually as alternative function pins.
2I/O port with bit-programmable pins. Configurable to input mode, push-pull output mode. Pins can also
be assigned individually as alternative function pins.
3I/O port with bit-programmable pins. Configurable to input mode, push-pull output mode. Pins can also
be assigned individually as alternative function pins.
4I/O port with bit-programmable pins. Configurable to input mode, push-pull output mode. Pins can also
be assigned individually as alternative function pins.
I/O PORTS S3C9484/C9488/F9488
9-2
PORT DATA REGISTERS
Table 9-2 gives you an overview of the register locations of all five S3C9484/C9488/F9488 I/O port data registers.
Data registers for ports 0, 1, 2, 3, and 4 have the general format shown in Figure 9-1.
Table 9-2. Port Data Register Summary
Register Name Mnemonic Decimal Hex R/W
Port 0 data register P0 224 E0H R/W
Port 1 data register P1 225 E1H R/W
Port 2 data register P2 226 E2H R/W
Port 3 data register P3 227 E3H R/W
Port 4 data register P4 228 E4H R/W
S3C9484/C9488/F9488 I/O PORTS
9-3
PORT 0
Port 0 is an 8-bit I/O Port that you can use two ways:
—General-purpose I/O
—Alternative function
Port 0 is accessed directly by writing or reading the port 0 data register, P0 at location E0H.
Port 0 Control Register (P0CONH, P0CONL, P0PUR)
Port 0 pins are configured individually by bit-pair settings in three control registers located :
P0CONL (low byte, E7H) , P0CONH (high byte, E6H) and P0PUR (D2H).
When you select output mode, a push-pull circuit is configured. In input mode, many different selections are
available:
—Input mode.
—Push-pull output mode
—Alternative function: LCD ‘COM’ signal output – COM4, COM5, COM6, COM7
—Alternative function: ADC input mode – ADC4, ADC5, ADC6, ADC7, ADC8
—Alternative function: RESETB
—Alternative function: Xtin/Xtout
I/O PORTS S3C9484/C9488/F9488
9-4
Port 0 Control Register, High Byte (P0CONH)
E6H, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
.5 .4
0 0
0 1
1 0
1 1
Input mode
Alternative function: ADC5 Input
Push-pull output
Alternative function: LCD COM5 signal output
.3 .2
0 0
0 1
1 0
1 1
Input mode
Alternative function: ADC6 Input
Push-pull output
Alternative function: LCD COM6 signal output
P0.6
COM5/
ADC5
P0.5
COM6/
ADC6
P0.7
COM4/
ADC4
P0.4
/COM7
/ADC7
.1 .0
0 0
0 1
1 0
1 1
Input mode
Alternative function: ADC7 Input
Push-pull output
Alternative function: LCD COM7 signal output
.7 .6
0 0
0 1
1 0
1 1
Input mode
Alternative function: ADC4 Input
Push-pull output
Alternative function: LCD COM4 signal output
NOTE:
You must be care of the pull-up resistor option.
Figure 9-1. Port 0 High-Byte Control Register (P0CONH)
S3C9484/C9488/F9488 I/O PORTS
9-5
Port 0 Control Register, Low Byte (P0CONL)
E7H, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
P0.3
/ADC8 P0.2 P0.1 P0.0
.7 .6
0 x
1 0
1 1
Input mode
Push-pull output
Alternative function: ADC8 input
.5 .4
0 x
1 x
.3 .2
0 x
1 x
.1 .0
0 x
1 x
Input mode
Push-pull output
Input mode
Push-pull output
Input mode
Push-pull output
NOTES:
1. You must determine P0.0-P0.2 function on smart option.
In other word, After reset operation, you cann't change P0.0-.2 function.
If you selected Normal I/O function at smart option,
After reset operation, you can use on Normal I/O and you can control P0.0-.2
by this control register value.
2. You must be care of the pull-up resistor option.
Figure 9-2. Port 0 Low-Byte Control Register (P0CONL)
I/O PORTS S3C9484/C9488/F9488
9-6
Port 0 Pull-up Resistor Control Register (P0PUR)
D2H, R/W, Reset value:FFH
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
0
1Pull-up resistor disable
Pull-up resistor enable
P0.6 P0.1
P0PUR Pin Configuration Settings:
P1.7
P1.5 P1.4 P1.3 P1.2
P1.0
Figure 9-3. Port 0 Pull-up Resistor Control Register (P0PUR)
PORT 1
Port 1 is an 8-bit I/O port that you can use two ways:
—General-purpose I/O
—Alternative function
Port 1 is accessed directly by writing or reading the port 1 data register, P1 at location E1H.
Port 1 Control Register (P1CONH, P1CONL, P1PUR)
Port 1 pins are configured individually by bit-pair settings in three control registers located:
P1CONL(low byte, E9H), P1CONH(high byte, E8H) and P1PUR(D3H).
When you select output mode, a push-pull circuit is configured. In input mode, many different selections are
available:
—Input mode.
—Push-pull output mode
—Alternative function: LCD ‘COM’ signal output – COM0, COM1, COM2, COM3
—Alternative function: TBPWM output
—Alternative function: BUZ output
—Alternative function: ADC input mode – ADC0, ADC1, ADC2, ADC3
S3C9484/C9488/F9488 I/O PORTS
9-7
Port 1 Control Register, High Byte (P1CONH)
E8H, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
.7 .6
0 x
1 0
1 1
Input mode
Push-pull output
Alternative function: LCD COM0 signal output
.5 .4
0 x
1 0
1 1
.3 .2
0 x
1 0
1 1
.1 .0
0 x
1 0
1 1
Input mode
Push-pull output
Alternative function: LCD COM1 signal output
Input mode
Push-pull output
Alternative function: LCD COM2 signal output
Input mode
Push-pull output
Alternative function: LCD COM3signal output
P1.7
/COM0 P1.6
/COM1 P1.5
/COM2 P1.4
/COM3
NOTE:
You must be care of the pull-up resistor option.
Figure 9-4. Port 1 High-Byte Control Register (P1CONH)
I/O PORTS S3C9484/C9488/F9488
9-8
Port 1 Control Register, Low Byte (P1CONL)
E9H, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
.7 .6
0 x
1 0
1 1
Input mode
Push-pull output
Alternative function: ADC0 input
.5 .4
0 x
1 0
1 1
.3 .2
0 0
0 1
1 0
1 1
.1 .0
0 0
0 1
1 0
1 1
Input mode
Push-pull output
Alternative function: ADC1 input
Input mode
Alternative function: BUZ output
Push-pull output
Alternative function: ADC2 input
Input mode
Alternative function: TBPWM output
Push-pull output
Alternative function: ADC3 input
P1.3
/ADC0 P1.2
/ADC1 P1.1
/ADC2
/BUZ
P1.0
/ADC3
/TBPWM
NOTE:
You must be care of the pull-up resistor option.
Figure 9-5. Port 1 Low-Byte Control Register (P1CONL)
S3C9484/C9488/F9488 I/O PORTS
9-9
Port 1 Pull-up Resistor Control Register (P1PUR)
D3H, R/W, Reset value:FFH
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
0
1Pull-up resistor disable
Pull-up resistor enable
P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0
P1PUR Pin Configuration Settings:
Figure 9-6. Port 1 Pull-up Resistor Control Register (P1PUR)
I/O PORTS S3C9484/C9488/F9488
9-10
PORT 2
Port 2 is an 8-bit I/O port that you can use two ways:
—General-purpose I/O
—Alternative function
Port 2 is accessed directly by writing or reading the port 2 data register, P2 at location E2H.
Port 2 Control Register (P2CONH, P2CONL)
Port 2 pins are configured individually by bit-pair settings in two control registers located :
P2CONL (low byte, EBH) and P2CONH (high byte, EAH).
When you select output mode, a push-pull circuit is configured. In input mode, many different selections are
available:
—input mode
—Push-pull output mode
—Alternative function: LCD ‘SEG’ signal output – SEG3, SEG4, SEG5, SEG6, SEG7, SEG8, SEG9, SEG10
Port 2 Control Register, Low Byte (P2CONL)
EBH, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
P2.0/SEG3
P2CONL Pin Configuration Settings:
00
01
10
11
Input mode with pull-up
Input mode
Push-pull output
Alternative function: LCD SEG(6-3) signal output
P2.1/SEG4
P2.2/SEG5
P2.3/SEG6
Figure 9-7. Port 2 High-Byte Control Register (P2CONH)
S3C9484/C9488/F9488 I/O PORTS
9-11
Port 2 Control Register, Low Byte (P2CONL)
EBH, R/W, Reset value: 00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
P2.0/SEG3
P2CONL Pin Configuration Settings:
0 0
0 1
1 0
1 1
Input mode with pull-up
Input mode
Push-pull output
Alternative function: LCD SEG(6-3) signal output
P2.1/SEG4
P2.2/SEG5
P2.3/SEG6
Figure 9-8. Port 2 Low-Byte Control Register (P2CONL)
I/O PORTS S3C9484/C9488/F9488
9-12
PORT 3
Port 3 is an 7-bit I/O Port that you can use two ways:
—General-purpose I/O
—Alternative function
Port 3 is accessed directly by writing or reading the port 3 data register, P3 at location E3H.
Port 3 Control / Interrupt Control Register (P3CONH, P3CONL)
Port 3 pins are configured individually by bit-pair settings in two control registers located:
P3CONL (low byte, EDH) , P3CONH (high byte, ECH).
When you select output mode, a push-pull circuit is configured. In input mode, many different selections are
available:
—Input mode.
—Push-pull output mode
—Alternative function: Timer A signal in/out mode – TAOUT(TAPWM), TACAP, TACK
—Alternative function: External interrupt input – INT0, INT1, INT2, INT3
—Alternative function: LCD ‘SEG’ signal output – SEG15, SEG16, SEG17, SEG18
—Alternative function: UART module – TXD/RXD
S3C9484/C9488/F9488 I/O PORTS
9-13
Port 3 Control Register, High-Byte (P3CONH)
ECH, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
.7 .6
0 0
0 1
1 0
1 1
Input mode with pull-up; External interrupt input (INT3); TACAP
Input mode; External interrupt input (INT3); TACAP
Push-pull output
Open-drain output
.5 .4
.3 .2
.1 .0
0 0
0 1
1 0
1 1
Input mode with pull-up; External interrupt input (INT1)
Input mode; External interrupt input (INT1)
Push-pull output
Alternative mode; TAOUT(TAPWM) output
P3.6
/TACAP
/INT3
P3.5
/TACK
/INT2
P3.4
/TAOUT
/INT1
P3.3
/SEG18
/INT0
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
Input mode with pull-up; External interrupt input (INT2); TACK
Input mode; External interrupt input (INT2); TACK
Push-pull output
Open-drain output
Input mode with pull-up; External interrupt input (INT0)
Input mode; External interrupt input (INT0)
Push-pull output
Alternative mode: LCD SEG18 signal output
NOTE:
Reset value of P3CONH is determined by Smart Option 3DH .
Figure 9-9. Port 3 High-Byte Control Register (P3CONH)
I/O PORTS S3C9484/C9488/F9488
9-14
Port 3 Control Register, Low Byte (P3CONL)
EDH, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
.7 .6 .5
0 0 0
0 0 1
0 1 0
0 1 1
1 x x
Input mode with pull-up
Input mode
Push-pull output
Alternative mode; TXD output
Alternative mode; LCD SEG17 signal output
.4 .3 .2
.1 .0 Input mode with pull-up
Input mode
Push-pull output
Alternative mode; LCD SEG15 signal output
P3.2/SEG17/TXD P3.1/SEG16/RXD
P3.0/SEG15
0 0 0
0 0 1
0 1 0
0 1 1
1 x x
0 0
0 1
1 0
1 1
Input mode with pull-up; RXD input
Input mode; RXD input
Push-pull output
Alternative mode: RXD output
Alternative mode: LCD SEG16 signal output
Figure 9-10. Port 3 Low-Byte Control Register (P3CONL)
S3C9484/C9488/F9488 I/O PORTS
9-15
Port 3 Interrupt Control Register (P3INT)
EEH, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
INT3
Interrupt Enable/Disable Selection
0 x
1 0
1 1
Interrupt disable
Interrupt enable; falling edge
Interrupt enable; rising edge
INT2 INT1 INT0
Figure 9-12. Port 3 Interrupt Control Register (P3INT)
Port 3 Interrupt Pending Register (P3PND)
EFH, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
INT3
Pending Bit:
0
1No interrupt pending (When write, pending clear)
Interrupt is pending
INT2 INT1 INT0Not used
Figure 9-13. Port 3 Interrupt Pending Register (P3PND)
I/O PORTS S3C9484/C9488/F9488
9-16
PORT 4
Port 4 is an 7-bit I/O port with individually configurable pins. Port 4 pins are accessed directly by writing or reading
the port 4 data register, P4 at location E4H. P4.0-P4.6 can serve as inputs (with or without pull-up), and push-pull
output. And they can serve as segment pins for LCD.
Port 4 Control Register (P4CONH, P4CONL)
Port 4 pins are configured individually by bit-pair settings in two control registers located :
P4CONL (low byte, F1H) , P4CONH (high byte, F0H)
When you select output mode, a push-pull circuit is configured. In input mode, many different selections are
available:
—Input mode.
—Push-pull output mode
—Alternative function: LCD ‘SEG’ signal output – SEG0, SEG1, SEG2, SEG11, SEG12, SEG13, SEG14
Port 4 Control Register, High-Byte (P4CONH)
F0H, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
P4.4/SEG12
.5 .4
.3 .2
.1 .0
P4.5/SEG13
P4.6/SEG14
Not used
0 0
0 1
1 0
1 1
Input mode with pull-up
Input mode
Push-pull output
Alternative mode: LCD SEG14 signal output
0 0
0 1
1 0
1 1
Input mode with pull-up
Input mode
Push-pull output
Alternative mode: LCD SEG13 signal output
0 0
0 1
1 0
1 1
Input mode with pull-up
Input mode
Push-pull output
Alternative mode: LCD SEG12 signal output
Figure 9-14. Port 4 High-Byte Control Register (P4CONH)
S3C9484/C9488/F9488 I/O PORTS
9-17
Port 4 Control Register, Low-Byte (P4CONL)
F1H, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
P4.0/SEG0
.7 .6
0 0
0 1
1 0
1 1
Input mode with pull-up
Input mode
Push-pull output
Alternative mode: LCD SEG11 signal output
.5 .4
.3 .2
.1 .0
P4.1/SEG1
P4.2/SEG2
P4.3/SEG11
0 0
0 1
1 0
1 1
Input mode with pull-up
Input mode
Push-pull output
Alternative mode: LCD SEG2 signal output
0 0
0 1
1 0
1 1
Input mode with pull-up
Input mode
Push-pull output
Alternative mode: LCD SEG1 signal output
0 0
0 1
1 0
1 1
Input mode with pull-up
Input mode
Push-pull output
Alternative mode: LCD SEG0 signal output
Figure 9-15. Port 4 Low-Byte Control Register (P4CONL)
I/O PORTS S3C9484/C9488/F9488
9-18
NOTES
S3C9484/C9488/F9488 BASIC TIMER
10-1
10 BASIC TIMER
OVERVIEW
BASIC TIMER (BT)
You can use the basic timer (BT):
—To signal the end of the required oscillation stabilization interval after a reset or a Stop mode release.
The functional components of the basic timer block are:
—Clock frequency divider (fxx divided by 4096, 1024 or 128) with multiplexer
—8-bit basic timer counter, BTCNT (DDH, read-only)
—Basic timer control register, BTCON (DCH, read/write)
BASIC TIMER CONTROL REGISTER (BTCON)
The basic timer control register, BTCON, is used to select the input clock frequency, to clear the basic timer counter
and frequency dividers. It is located in address DCH, and is read/write addressable using register addressing mode.
A reset clears BTCON to '00H'. This enables selects a basic timer clock frequency of fXX/4096.
The 8-bit basic timer counter, BTCNT (DDH), can be cleared at any time during normal operation by writing a "1" to
BTCON.1. To clear the frequency dividers, write a "1" to BTCON.0.
BASIC TIMER S3C9484/C9488/F9488
10-2
Basic Timer Control Register (BTCON)
DCH, R/W, Reset value:00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Divider clear bit:
0 = No effect
1 = Clear divider
Basic timer counter clear bit:
0 = No effect
1 = Clear BTCNT
Basic timer input clock selection bit:
00 = fxx/4096
01 = fxx/1024
10 = fxx/128
11 = Not used
Not used
Figure 10-1. Basic Timer Control Register (BTCON)
S3C9484/C9488/F9488 BASIC TIMER
10-3
BASIC TIMER FUNCTION DESCRIPTION
Oscillation Stabilization Interval Timer Function
You can also use the basic timer to program a specific oscillation stabilization interval following a reset or when Stop
mode has been released by an external interrupt.
In Stop mode, whenever a reset or an external interrupt occurs, the oscillator starts. The BTCNT value then starts
increasing at the rate of fxx/4096 (for reset), or at the rate of the preset clock source (for an external interrupt). When
BTCNT.4 overflows, a signal is generated to indicate that the stabilization interval has elapsed and to gate the clock
signal off to the CPU so that it can resume normal operation.
In summary, the following events occur when stop mode is released:
1. During stop mode, a power-on reset or an interrupt occurs to trigger the Stop mode release and oscillation
starts.
2. If a power-on reset occurred, the basic timer counter will increase at the rate of fxx/4096. If an interrupt is used
to release stop mode, the BTCNT value increases at the rate of the preset clock source.
3. Clock oscillation stabilization interval begins and continues until bit 4 of the basic timer counter overflows.
4. When a BTCNT.4 overflow occurs, normal CPU operation resumes.
NOTE:
During a power-on reset operation, the CPU is idle during the required oscillation
stabilization interval (until bit 4 of the basic timer counter overflows).
MUX
fxx/4096
DIV fxx/1024
fxx/128
fxx
Bits 3, 2
Bit 0
Clear
Bit 1 RESET or STOP
Data Bus
8-Bit Up Counter
(BTCNT, Read-Only)
Start the CPU
(note)
R
Figure 10-2. Basic Timer Block Diagram
BASIC TIMER S3C9484/C9488/F9488
10-4
NOTES
S3C9484/C9488/F9488 8-BIT TIMER A/B
11-1
11 8-BIT TIMER A/B
8-BIT TIMER A
OVERVIEW
The 8-bit timer A is an 8-bit general-purpose timer/counter. Timer A has three operating modes, you can select one
of them using the appropriate TACON setting:
—Interval timer mode (Toggle output at TAOUT pin)
—Capture input mode with a rising or falling edge trigger at the TACAP pin
—PWM mode (TAOUT)
Timer A has the following functional components:
—Clock frequency divider (fxx divided by 1024, 256, or 64) with multiplexer
—External clock input pin (TACK)
—8-bit counter (TACNT), 8-bit comparator, and 8-bit reference data register (TADATA)
—I/O pins for capture input (TACAP) or PWM or match output (TAOUT)
—Timer A overflow interrupt and match/capture interrupt generation
—Timer A control register, TACON (F3H, read/write)
8-BIT TIMER A/B S3C9484/C9488/F9488
11-2
FUNCTION DESCRIPTION
Timer A Interrupts
The timer A module can generate two interrupts: the timer A overflow interrupt (TAOVF), and the timer A match/
capture interrupt (TAINT).
Timer A overflow interrupt pending condition must be cleared by software when it has been serviced. Timer A
match/capture interrupt, TAINT pending condition is also cleared by software when it has been serviced.
Interval Timer Function
The timer A module can generate an interrupt: the timer A match interrupt (TAINT).
When timer A interrupt occurs and is serviced by the CPU, the pending condition have to be cleared by software.
In interval timer mode, a match signal is generated and TAOUT is toggled when the counter value is identical to the
value written to the TA reference data register, TADATA. The match signal generates a timer A match interrupt and
clears the counter.
If, for example, you write the value 10H to TADATA and 0AH to TACON, the counter will increment until it reaches
10H. At this point, the TA interrupt request is generated, the counter value is reset, and counting resumes.
Pulse Width Modulation Mode
Pulse width modulation (PWM) mode lets you program the width (duration) of the pulse that is output at the TAOUT
pin. As in interval timer mode, a match signal is generated when the counter value is identical to the value written to
the timer A data register. In PWM mode, however, the match signal does not clear the counter. Instead, it runs
continuously, overflowing at FFH, and then continues incrementing from 00H.
Although you can use the match signal to generate a timer A overflow interrupt, interrupts are not typically used in
PWM-type applications. Instead, the pulse at the TAOUT pin is held to Low level as long as the reference data value
is less than or equal to ( ≤ ) the counter value and then the pulse is held to High level for as long as the data value is
greater than ( > ) the counter value. One pulse width is equal to tCLK • 256 .
Capture Mode
In capture mode, a signal edge that is detected at the TACAP pin opens a gate and loads the current counter value
into the TADATA register. You can select rising or falling edges to trigger this operation.
Timer A also gives you capture input source: the signal edge at the TACAP pin. You select the capture input by
setting the value of the timer A capture input selection bit in the port 3 high–byte control register, P3CONH, (ECH).
When P3CONH.5.4 is 00 and 01, the TACAP input or normal input is selected. When P3CONH.5.4 is set to 10 and
11, output is selected.
Both kinds of timer A interrupts can be used in capture mode: the timer A overflow interrupt is generated whenever a
counter overflow occurs; the timer A match/capture interrupt is generated whenever the counter value is loaded into
the TADATA register.
By reading the captured data value in TADATA, and assuming a specific value for the timer A clock frequency, you
can calculate the pulse width (duration) of the signal that is being input at the TACAP pin.
S3C9484/C9488/F9488 8-BIT TIMER A/B
11-3
TIMER A CONTROL REGISTER (TACON)
You use the timer A control register, TACON
—Select the timer A operating mode (interval timer, capture mode and PWM mode)
—Select the timer A input clock frequency
—Clear the timer A counter, TACNT
—Enable the timer A overflow interrupt or timer A match/capture interrupt
—Timer A start/stop
—Clear timer A match/capture interrupt pending conditions
TACON is located at address F3H, and is read/write addressable using Register addressing mode.
A reset clears TACON to '00H'. This sets timer A to normal interval timer mode, selects an input clock frequency of
fxx/1024, and disables all timer A interrupts. You can clear the timer A counter at any time during normal operation
by writing a "1" to TACON.3. You can start the timer A counter by writing a “1” to TACON.0.
The timer A overflow interrupt (TAOVF) has the vector address 00H-01H. When a timer A overflow interrupt occurs
and is serviced by the CPU, but the pending condition must clear by software.
To enable the timer A match/capture interrupt , you must write TACON.1 to "1". To generate the exact time interval,
you should write TACON.3 and .0, which cleared counter and interrupt pending bit. When interrupt service routine is
served, the pending condition must be cleared by software by writing a ‘0’ to the interrupt pending bit.
Timer A Control Register (TACON)
F3H, R/W, Reset: 00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Timer A match/capture interrupt
enable bit:
0 = Disable interrupt
1 = Enable interrrupt
Timer A input clock selection bit:
00 = fxx/1024
01 = fxx/256
10 = fxx/64
11 = External clock (TACK)
Timer A operating mode selection bit:
00 = Interval mode (TAOUT mode)
01 = Capture mode (capture on rising edge,
counter running, OVF can occur)
10 = Capture mode (capture on falling edge,
counter running, OVF can occur)
11 = PWM mode (OVF interrupt and match
interrupt can occur)
Timer A start/stop bit:
0 = Stop timer A
1 = Start timer A
Timer A overflow interrupt enable bit:
0 = Disable overflow interrupt
1 = Enable overflow interrrupt
Timer A counter clear bit:
0 = No effect
1 = Clear the timer A counter (when write)
NOTE:
When th counter clear bit(.3) is set, the 8-bit counter is cleared and
it also is cleared automatically.
Figure 11-1. Timer A Control Register (TACON)
8-BIT TIMER A/B S3C9484/C9488/F9488
11-4
Timer Interrupt Pending Register (TINTPND)
F2H, Reset: 00H, R/W
Not Used Timer A macth/capture
interrupt pending flag:
0 = Not pending
0 = Clear pending bit
(When write)
1 = Interrupt pending
Timer A overflow
interrupt pending flag:
0 = Not pending
0 = Clear pending bit
(When write)
1 = Interrupt pending
Timer B underflow
interrupt pending flag:
0 = Not pending
0 = Clear pending bit
(When write)
1 = Interrupt pending
.7
MSB LSB
.6 .5 .4 .3 .2 .1 .0
Figure 11-2. Timer interrupts Pending Register (TINTPND)
Timer A Data Register (TADATA)
F5H, R/W
.7
MSB LSB
.6 .5 .4 .3 .2 .1 .0
Reset Value: FFh
Figure 11-3. Timer A DATA Register (TADATA)
S3C9484/C9488/F9488 8-BIT TIMER A/B
11-5
BLOCK DIAGRAM
NOTES:
1. When PWM mode, match signal cannot clear counter.
2. Pending bit is located at TINTPND register.
Clear
Match
TACON.2
Pending
TACON.3
Overflow TAOVF
TACAP TINTPND.0
TACON.5.4
TACON.5.4
Data Bus
8
Data Bus
8
M
U
X
8-bit Up-Counter
(Read Only)
8-bit Comparator
Timer A Buffer Reg
Timer A Data Register
(Read/Write)
M
U
X
TACON.1
Pending
TAINT
TINTPND.1
TACON.0
TACON.7-.6
fxx/1024
fxx/256
fxx/64
TACK
M
U
X
TAOUT
M
U
X
Figure 11-4. Timer A Functional Block Diagram
8-BIT TIMER A/B S3C9484/C9488/F9488
11-6
8-BIT TIMER B
OVERVIEW
The S3C9484/C9488/F9488 micro-controller has an 8-bit counter called timer B. Timer B, which can be used to
generate the carrier frequency of a remote controller signal. As a normal interval timer, generating a timer B interrupt
at programmed time intervals.
TBCON.6-.7
fxx/1
Data Bus
NOTE:
In case of setting TBCON.5-.4 at '10', the value of the TBDATAL register is loaded into
the 8-bit counter when the operation of the timer B starts. And then if a underflow occurs
in the counter, the value of the TBDATAH register is loaded with the value of the 8-bit counter.
However, if the next borrow occurs, the value of the TBDATAL register is loaded with the value of
the 8-bit counter.
M
U
X
fxx/2
fxx/4
fxx/8
TBCON.2
CLK 8-Bit
Down Counter
MUX
Timer B Data
Low Byte Register
Timer B Data
High Byte Register
Repeat
Control
TBCON.0
T-FF
TBCON.4-.5
TBCON.3
TB Underflow
(TBUF)
TBINT
TBPWM
Pending
TINTPND.2
Figure 11-5. Timer B Functional Block Diagram
S3C9484/C9488/F9488 8-BIT TIMER A/B
11-7
Timer B Control Register (TBCON)
F8H, R/W, Reset: 00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Timer B mode selection bit:
0 = One-shot mode
1 = Repeating mode
Timer B input clock selection bit:
00 = fxx/1
01 = fxx/2
10 = fxx/4
11 = fxx/8
Timer B interrupt time selection bit:
00 = Interrupt on TBDATAL underflow
01 = Interrupt on TBDATAH underflow
10 = Interrupt on TBDATAH and TBDATAL underflow
11 = Invaild setting Timer B start/stop bit:
0 = Stop timer B
1 = Start timer B
Timer B underflow interrupt
enable bit:
0 = Disable interrupt
1 = Enable interrupt
Timer B output flip-flop
control bit:
0 = T-FF is low
1 = T-FF is high
Figure 11-6. Timer B Control Register (TBCON)
Timer B Data High-Byte Register (TBDATAH)
F6H, R/W
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Reset Value: FFh
Timer B Data Low-Byte Register (TBDATAL)
F7H, R/W
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Reset Value: FFh
Figure 11-7. Timer B DATA Registers (TBDATAH, TBDATAL)
8-BIT TIMER A/B S3C9484/C9488/F9488
11-8
+ Programming Tip – Using Timer A (fxx – 8MHz, 800µsec interval)
.INCLUDE "C:\SKSTUDIO\INCLUDE\REG\S3C9488.REG"
VECTOR 00H,F9488_INT
.ORG 003CH
DB 0FFH
DB 0FFH
DB 01100000B ;DISABLE LVR
DB 00000011B ;SUB OSCILLATOR,BT OVERFLOW, RESET PIN ENALBE
.ORG 100H
RESET: DI
LD WDTCON,#10101010B
LD BTCON,#0001011B
LD CLKCON,#00011000B
LD SP,#0C0H
LD SYM,#00H
LD OSCCON,#00000000B
LD P3CONH,#10101110B ;TAOUT
LD TADATA,#100
LD TACON,#10001011B ;Fxx/64,INTERVAL MODE,TIMER START.
EI
;================================================================================
MAIN JP MAIN
;================================================================================
F9488_INT TM TINTPND,#01H ;CHECK WHAT INTERRUPT IS ENABLED
JP NC,TA_MC_INT
;..........
IRET
TA_MC_INT LD TINTPND,#0
NOP
NOP
IRET
.END
S3C9484/C9488/F9488 8-BIT TIMER A/B
11-9
+ Programming Tip – Using Timer B (fxx – 8MHz, Duty – 2:8, 80kHz)
.INCLUDE "C:\SKSTUDIO\INCLUDE\REG\S3C9488.REG"
VECTOR 00H,F9488_INT
.ORG 003CH
DB 0FFH
DB 0FFH
DB 01100000B ;DISABLE LVR
DB 00000011B ;SUB OSCILLATOR,BT OVERFLOW, RESET PIN ENALBE
.ORG 100H
RESET:
DI
LD WDTCON,#10101010B
LD BTCON,#0001011B
LD CLKCON,#00011000B
LD SP,#0C0H
LD SYM,#00H
LD OSCCON,#00000000B
LD P1CONL,#10101001B ;TB PWM
LD TBDATAH,#79
LD TBDATAL,#19
LD TBCON,#00101111B ;Fxx,REPEAT MODE,FLIP-FLOP HIGH,TIMER START.
EI
;================================================================================
MAIN JP MAIN
;================================================================================
F9488_INT TM TINTPND,#04H ;CHECK WHAT INTERRUPT IS ENABLED
JP NC,TB_UF_INT
;..........
IRET
TB_UF_INT LD TINTPND,#0
NOP
NOP
IRET
.END
8-BIT TIMER A/B S3C9484/C9488/F9488
11-10
NOTES
S3C9484/C9488/F9488 UART
12-1
12 UART
OVERVIEW
The UART block has a full-duplex serial port with programmable operating modes: There is one synchronous mode
and three UART (Universal Asynchronous Receiver/Transmitter) modes:
—Shift Register I/O with baud rate of fxx/(16 × (16bit BRDATA+1))
—8-bit UART mode; variable baud rate, fxx/(16 × (16bit BRDATA+1))
—9-bit UART mode; variable baud rate, fxx/(16 × (16bit BRDATA+1))
UART receive and transmit buffers are both accessed via the data register, UDATA, is at address FFH. Writing to
the UART data register loads the transmit buffer; reading the UART data register accesses a physically separate
receive buffer.
When accessing a receive data buffer (shift register), reception of the next byte can begin before the previously
received byte has been read from the receive register. However, if the first byte has not been read by the time the
next byte has been completely received, the first data byte will be lost (Overrun error).
In all operating modes, transmission is started when any instruction (usually a write operation) uses the UDATA
register as its destination address. In mode 0, serial data reception starts when the receive interrupt pending bit
(UARTPND.1) is "0" and the receive enable bit (UARTCON.4) is "1". In mode 1 and 2, reception starts whenever an
incoming start bit ("0") is received and the receive enable bit (UARTCON.4) is set to "1".
PROGRAMMING PROCEDURE
To program the UART modules, follow these basic steps:
1. Configure P3.1 and P3.2 to alternative function (RXD (P3.1), TXD (P3.2)) for UART module by setting the
P3CONL register to appropriate value.
2. Load an 8-bit value to the UARTCON control register to properly configure the UART I/O module.
3. For parity generation and check in UART mode 2, set parity enable bit (UARTPND.5) to “1”.
4. For interrupt generation, set the UART interrupt enable bit (UARTCON.1 or UARTCON.0) to "1".
5. When you transmit data to the UART buffer, write transmit data to UDATA, the shift operation starts.
6. When the shift operation (transmit/receive) is completed, UART pending bit (UARTPND.1 or UARTPND.0) is set
to "1" and an UART interrupt request is generated.
UART S3C9484/C9488/F9488
12-2
UART CONTROL REGISTER (UARTCON)
The control register for the UART is called UARTCON at address FDH. It has the following control functions:
—Operating mode and baud rate selection
—Multiprocessor communication and interrupt control
—Serial receive enable/disable control
—9th data bit location for transmit and receive operations (mode 2)
—Parity generation and check for transmit and receive operations (mode 2)
—UART transmit and receive interrupt control
A reset clears the UARTCON value to "00H". So, if you want to use UART module, you must write appropriate value
to UARTCON.
S3C9484/C9488/F9488 UART
12-3
If parity disable mode (PEN = 0),
location of the 9th data bit that was received
in UART mode 2 ("0" or "1").
If parity enable mode (PEN = 1),
Even/odd parity selection bit for receive data
in UART mode 2.
0: Even parity check for the received data
1: Odd parity check for the received data
UART Control Register (UARTCON)
FDH, R/W, Reset Value: 00H
MS1MSB LSB
Received interrupt enable bit:
0 = Disable
1 = Enable
Transmit interrupt enable bit:
0 = Disable
1 = Enable
Serial data receive enable bit:
0 = Disable
1 = Enable
Multiprocessor communication
enable bit (mode 2 only):(1)
0 = Disable
1 = Enable
If parity disable mode (PEN = 0),
location of the 9th data bit to be transmitted
in UART mode 2 ("0" or "1").
If parity enable mode (PEN = 1),
Even/odd parity selection bit for transmit data
in UART mode 2;
0: Even parity bit generation for transmit data
1: Odd parity bit generation for transmit data
Operating mode and
baud rate selection bits
(see table below)
MS0 MCE RE TB8 RB8 RIE TIE
MS1 MS0
0
0
1
0
1
x
Description Baud Rate
0
1
2
Shift register
8-bit UART
9-bit UART
fxx / (16 x (16bit BRDATA + 1))
fxx / (16 x (16bit BRDATA + 1))
fxx / (16 x (16bit BRDATA + 1))
NOTES:
1. In mode 2, if the UARTCON.5 bit is set to "1" then the receive interrupt will not be
activated if the received 9th data bit is "0". In mode 1, if UARTCON.5 = "1" then the
receive interrut will not be activated if a valid stop bit was not received.
2. The descriptions for 8-bit and 9-bit UART mode do not include start and stop bits
of serial data for receiving and transmitting.
3. Parity enable bits, PEN, is located in the UARTPND register at address FEH.
4. Parity enable and parity error check can be available in 9-bit UART mode
(Mode 2) only.
Mode
Figure 12-1. UART Control Register (UARTCON)
UART S3C9484/C9488/F9488
12-4
UART INTERRUPT PENDING REGISTER (UARTPND)
The UART interrupt pending register, UARTPND is located at address FEH. It contains the UART data transmit
interrupt pending bit (UARTPND.0) and the receive interrupt pending bit (UARTPND.1).
In mode 0 of the UART module, the receive interrupt pending flag UARTPND.1 is set to "1" when the 8th receive data
bit has been shifted. In mode 1 or 2, the UARTPND.1 bit is set to "1" at the halfway point of the stop bit's shift time.
When the CPU has acknowledged the receive interrupt pending condition, the UARTPND.1 flag must be cleared by
software in the interrupt service routine.
In mode 0 of the UART module, the transmit interrupt pending flag UARTPND.0 is set to "1" when the 8th transmit
data bit has been shifted. In mode 1 or 2, the UARTPND.0 bit is set at the start of the stop bit. When the CPU has
acknowledged the transmit interrupt pending condition, the UARTPND.0 flag must be cleared by software in the
interrupt service routine.
UART Pending Register (UARTPND)
FEH, R/W, Reset Value: 00H
.7MSB LSB
UART receive interrupt pending flag:
0 = Not pending
0 = Clear pending bit (when write)
1 = Interrupt pending
UART transmit interrupt pending flag:
0 = Not pending
0 = Clear pending bit (when write)
1 = Interrupt pending
UART receive parity error:
0 = No error
1 = Parity error
UART parity enable/disable:
0 = Disable
1 = Enable
Not used
.6 PEN RPE .3 .2 RIP TIP
NOTES:
1. In order to clear a data transmit or receive interrupt pending flag, you must write a "0"
to the appropriate pending bit. A "0" has no effect.
2. To avoid errors, we recommended using load instruction, when manipulating
UARTPND value.
3. Parity enable and parity error check can be available in 9-bit UART mode
(Mode 2) only.
4. Parity error bit (RPE) will be refreshed whenever 8th receive data bit has been
shifted.
Not used
Figure 12-2. UART Interrupt Pending Register (UARTPND)
S3C9484/C9488/F9488 UART
12-5
In mode 2 (9-bit UART data), by setting the parity enable bit (PEN) of UARTPND register to '1', the 9th data bit of
transmit data will be an automatically generated parity bit. Also, the 9th data bit of the received data will be treated as
a parity bit for checking the received data.
In parity enable mode (PEN = 1), UARTCON.3 (TB8) and UARTCON.2 (RB8) will be a parity selection bit for transmit
and receive data respectively. The UARTCON.3 (TB8) is for settings of the even parity generation (TB8 = 0) or the
odd parity generation (TB8 = 0) in the transmit mode. The UARTCON.2 (RB8) is also for settings of the even parity
checking (RB8= 0) or the odd parity checking (RB8 =1) in the receive mode. The parity enable (generation/checking)
functions are not available in UART mode 0 and 1.
If you don’t want to use a parity mode, UARTCON.2 (RB8) and UARTCON.3 (TB8) are a normal control bit as the 9th
data bit, in this case, PEN must be disable (“0”) in mode 2. Also it is needed to select the 9th data bit to be
transmitted by writing TB8 to "0" or "1".
The receive parity error flag (RPE) will be set to ‘0’ or ‘1’ depending on parity error whenever the 8th data bit of the
receive data has been shifted.
UART DATA REGISTER (UDATA)
UART Data Register (UDATA)
FFH, R/W, Reset Value: Undefined
.7
MSB LSB
Transmit or Receive data
.6 .5 .4 .3 .2 .1 .0
Figure 12-3. UART Data Register (UDATA)
UART S3C9484/C9488/F9488
12-6
UART BAUD RATE DATA REGISTER (BRDATAH, BRDATAL)
The value stored in the UART baud rate register, (BRDATAH, BRDATAL), lets you determine the UART clock rate
(baud rate).
UART Baud Rate Data Register
(BRDATAH) DAH, R/W, Reset Value: FFH
(BRDATAL) DBH, R/W, Reset Value: FFH
.7MSB LSB.6 .5 .4 .3 .2 .1 .0
Baud rate data
Figure 12-4. UART Baud Rate Data Register (BRDATAH, BRDATAL)
BAUD RATE CALCULATIONS
The baud rate is determined by the baud rate data register, 16bit BRDATA
Mode 0 baud rate = fxx/(16 × (16Bit BRDATA + 1))
Mode 1 baud rate = fxx/(16 × (16Bit BRDATA + 1))
Mode 2 baud rate = fxx/(16 × (16Bit BRDATA + 1))
S3C9484/C9488/F9488 UART
12-7
Table 12-1. Commonly Used Baud Rates Generated by 16-bit BRDATA
Baud Rate Oscillation Clock BRDATAH BRDATAL
Decimal Hex Decimal Hex
230,400 Hz 11.0592 MHz 00H 02 02H
115,200 Hz 11.0592 MHz 00H 05 05H
57,600 Hz 11.0592 MHz 00H 11 0BH
38,400 Hz 11.0592 MHz 00H 17 11H
19,200 Hz 11.0592 MHz 00H 35 23H
9,600 Hz 11.0592 MHz 00H 71 47H
4,800 Hz 11.0592 MHz 00H 143 8FH
76,800 Hz 10 MHz 00H 77H
38,400 Hz 10 MHz 00H 15 FH
19,200 Hz 10 MHz 00H 31 1FH
9,600 Hz 10 MHz 00H 64 40H
4,800 Hz 10 MHz 00H 129 81H
2,400 Hz 10 MHz 11H 33H
600 Hz 10 MHz 44H 16 10H
38,461 Hz 8 MHz 00H 12 0CH
12,500 Hz 8 MHz 00H 39 27H
19,230 Hz 4 MHz 00H 12 0CH
9,615 Hz 4 MHz 00H 25 19H
UART S3C9484/C9488/F9488
12-8
BLOCK DIAGRAM
Zero Detector
UDATA
RxD (P3.1)
TIE
RIE
Interrupt
1-to-0
Transition
Detector
RE
RIE
Bit Detector Shift
Value
MS0
MS1
MS0
MS1
RxD (P3.1)
SAM88 Internal Data Bus
Write to
UDATA
Baud Rate
Generator
S
DQ
CLK
TB8
CLK
Tx Control
Start
Tx Clock TIP
Shift
EN
Send
Rx Control
Rx Clock
Start
RIP Receive
Shift
Shift
Clock
MS0
MS1
fxx
SAM88 Internal Data Bus
Shift
Register
UDATA
16 BIT
BRDATA
TxD (P3.2)
TxD (P3.2)
Figure 12-5. UART Functional Block Diagram
S3C9484/C9488/F9488 UART
12-9
UART MODE 0 FUNCTION DESCRIPTION
In mode 0, UART is input and output through the RxD (P3.1) pin and TxD (P3.2) pin outputs the shift clock. Data is
transmitted or received in 8-bit units only. The LSB of the 8-bit value is transmitted (or received) first.
Mode 0 Transmit Procedure
1. Select mode 0 by setting UARTCON.6 and .7 to "00B".
2. Write transmission data to the shift register UDATA (FFH) to start the transmission operation.
Mode 0 Receive Procedure
1. Select mode 0 by setting UATCON.6 and .7 to "00B".
2. Clear the receive interrupt pending bit (UARTPND.1) by writing a "0" to UARTPND.1.
3. Set the UART receive enable bit (UARTCON.4) to "1".
4. The shift clock will now be output to the TxD (P3.2) pin and will read the data at the RxD (P3.1) pin. A UART
receive interrupt (vector 00H-01H) occurs when UARTCON.1 is set to "1".
Transmit
D0 D1 D2 D3 D4 D5 D6 D7
Write to Shift Register (UDATA)
RxD (Data Out)
TxD (Shift Clock)
TIP
Shift
Receive
Write to UARTPND (Clear RIP and set RE)
Shift
D0 D1 D2 D3 D4 D5 D6 D7
TxD (Shift Clock)
RxD (Data In)
RE
RIP
12345678
Figure 12-6. Timing Diagram for UART Mode 0 Operation
UART S3C9484/C9488/F9488
12-10
UART MODE 1 FUNCTION DESCRIPTION
In mode 1, 10-bits are transmitted (through the TxD (P3.2) pin) or received (through the RxD (P3.1) pin). Each data
frame has three components:
—Start bit ("0")
—8 data bits (LSB first)
—Stop bit ("1")
When receiving, the stop bit is written to the RB8 bit in the UARTCON register. The baud rate for mode 1 is variable.
Mode 1 Transmit Procedure
1. Select the baud rate generated by 16bit BRDATA.
2. Select mode 1 (8-bit UART) by setting UARTCON bits 7 and 6 to '01B'.
3. Write transmission data to the shift register UDATA (FFH). The start and stop bits are generated automatically
by hardware.
Mode 1 Receive Procedure
1. Select the baud rate to be generated by 16bit BRDATA.
2. Select mode 1 and set the RE (Receive Enable) bit in the UARTCON register to "1".
3. The start bit low ("0") condition at the RxD (P3.1) pin will cause the UART module to start the serial data receive
operation.
Transmit
TIP
Write to Shift Register (UDATA)
Start Bit
TxD Stop BitD0 D1 D2 D3 D4 D5 D6 D7
Shift
Tx
Clock
Receive
RIP
Start Bit
Rx
Clock
Stop Bit
RxD D0 D1 D2 D3 D4 D5 D6 D7
Bit Detect Sample Time
Shift
Figure 12-7. Timing Diagram for UART Mode 1 Operation
S3C9484/C9488/F9488 UART
12-11
UART MODE 2 FUNCTION DESCRIPTION
In mode 2, 11-bits are transmitted (through the TxD pin) or received (through the RxD pin). Each data frame has four
components:
—Start bit ("0")
—8 data bits (LSB first)
—Programmable 9th data bit or parity bit
—Stop bit ("1")
< In parity disable mode (PEN = 0) >
The 9th data bit to be transmitted can be assigned a value of "0" or "1" by writing the TB8 bit (UARTCON.3).
When receiving, the 9th data bit that is received is written to the RB8 bit (UARTCON.2), while the stop bit is ignored.
The baud rate for mode 2 is fosc/(16 x (16bit BRDATA + 1)) clock frequency.
< In parity enable mode (PEN = 1) >
The 9th data bit to be transmitted can be an automatically generated parity of "0" or "1" depending on a parity
generation by means of TB8 bit (UARTCON.3). When receiving, the received 9th data bit is treated as a parity for
checking receive data by means of the RB8 bit (UARTCON.2), while the stop bit is ignored. The baud rate for mode
2 is fosc/(16 × (16bit BRDATA + 1)) clock frequency.
Mode 2 Transmit Procedure
1. Select the baud rate generated by 16bit BRDATA.
2. Select mode 2 (9-bit UART) by setting UARTCON bits 6 and 7 to '10B'. Also, select the 9th data bit to be
transmitted by writing TB8 to "0" or "1" and set PEN bit of UARTPND register to “0” if you don’t use a parity
mode. If you want to use the parity enable mode, select the parity bit to be transmitted by writing TB8 to "0" or
"1" and set PEN bit of UARTPND register to “1”.
3. Write transmission data to the shift register, UDATA (FFH), to start the transmit operation.
Mode 2 Receive Procedure
1. Select the baud rate to be generated by 16bit BRDATA.
2. Select mode 2 and set the receive enable bit (RE) in the UARTCON register to "1".
3. If you don’t use a parity mode, set PEN bit of UARTPND register to “0” to disable parity mode.
If you want to use the parity enable mode, select the parity type to be check by writing TB8 to "0" or "1" and set
PEN bit of UARTPND register to “1”. Only 8 bits (Bit0 to Bit7) of received data are available for data value.
4. The receive operation starts when the signal at the RxD pin goes to low level.
UART S3C9484/C9488/F9488
12-12
Transmit
TIP
Write to Shift Register (UARTDATA)
Start Bit
TxD Stop BitD0 D1 D2 D3 D4 D5 D6 D7
Shift
Tx
Clock
Receive
RIP
Start Bit
Rx
Clock
Stop
Bit
RxD D0 D1 D2 D3 D4 D5 D6 D7
Bit Detect Sample Time
Shift
TB8 or Parity bit
RB8 or Parity bit
Figure 12-8. Timing Diagram for UART Mode 2 Operation
S3C9484/C9488/F9488 UART
12-13
SERIAL COMMUNICATION FOR MULTIPROCESSOR CONFIGURATIONS
The S3C9-series multiprocessor communication features let a "master" S3C9484/C9488/F9488 send a multiple-
frame serial message to a "slave" device in a multi- S3C9484/C9488/F9488 configuration. It does this without
interrupting other slave devices that may be on the same serial line.
This feature can be used only in UART mode 2 with the parity disable mode. In mode 2, 9 data bits are received. The
9th bit value is written to RB8 (UARTCON.2). The data receive operation is concluded with a stop bit. You can
program this function so that when the stop bit is received, the serial interrupt will be generated only if RB8 = "1".
To enable this feature, you set the MCE bit in the UARTCON registers. When the MCE bit is "1", serial data frames
that are received with the 9th bit = "0" do not generate an interrupt. In this case, the 9th bit simply separates the
address from the serial data.
Sample Protocol for Master/Slave Interaction
When the master device wants to transmit a block of data to one of several slaves on a serial line, it first sends out
an address byte to identify the target slave. Note that in this case, an address byte differs from a data byte: In an
address byte, the 9th bit is "1" and in a data byte, it is "0".
The address byte interrupts all slaves so that each slave can examine the received byte and see if it is being
addressed. The addressed slave then clears its MCE bit and prepares to receive incoming data bytes.
The MCE bits of slaves that were not addressed remain set, and they continue operating normally while ignoring the
incoming data bytes.
While the MCE bit setting has no effect in mode 0, it can be used in mode 1 to check the validity of the stop bit. For
mode 1 reception, if MCE is "1", the receive interrupt will be issue unless a valid stop bit is received.
UART S3C9484/C9488/F9488
12-14
Setup Procedure for Multiprocessor Communications
Follow these steps to configure multiprocessor communications:
1. Set all S3C9484/C9488/F9488 devices (masters and slaves) to UART mode 2 with parity disable.
2. Write the MCE bit of all the slave devices to "1".
3. The master device's transmission protocol is:
—First byte: the address
identifying the target
slave device (9th bit = "1")
—Next bytes: data
(9th bit = "0")
4. When the target slave receives the first byte, all of the slaves are interrupted because the 9th data bit is "1". The
targeted slave compares the address byte to its own address and then clears its MCE bit in order to receive
incoming data. The other slaves continue operating normally.
Full-Duplex Multi-S3C9484/C9488/F9488 Interconnect
. . .
TxD RxD
Master
S3C9484/
C9488/
F9488
TxD RxD
Slave 1
TxD RxD
Slave 2
TxD RxD
Slave n
S3C9484/
C9488/
F9488
S3C9484/
C9488/
F9488
S3C9484/
C9488/
F9488
Figure 12-9. Connection Example for Multiprocessor Serial Data Communications
S3C9484/C9488/F9488 WATCH TIMER
13-1
13 WATCH TIMER
OVERVIEW
Watch timer functions include real-time and watch-time measurement and interval timing for the system clock. To
start watch timer operation, set bit 1 and bit 6 of the watch timer mode register, WTCON.1 and .6, to "1". After the
watch timer starts and elapses a time, the watch timer interrupt is automatically set to "1", and interrupt requests
commence in 3.9ms, 0.25 s, 0.5s or 1.0s intervals.
The watch timer can generate a steady 0.5kHz, 1kHz, 2 kHz or 4 kHz signal to the BUZZER output. By setting
WTCON.3 and WTCON.2 to "11b", the watch timer will function in high-speed mode, generating an interrupt every
3.91 ms. High-speed mode is useful for timing events for program debugging sequences.
The watch timer supplies the clock frequency for the LCD controller (fLCD ). Therefore, if the watch timer is
disabled, the LCD controller does not operate.
—Real-Time and Watch-Time Measurement
— Using a Main System or Subsystem Clock Source
—Clock Source Generation for LCD Controller
—Buzzer Output Frequency Generator
—Timing Tests in High-Speed Mode
WATCH TIMER S3C9484/C9488/F9488
13-2
WATCH TIMER CONTROL REGISTER (WTCON)
Watch Timer Control Register (WTCON)
F9H, R/W, Reset: 00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Watch Timer interrupt pending bit :
0 = interrupt is not pending
(When write, pending bit cleared)
1 = interrupt is pending
Watch Timer control selection bit :
0 = main system clock (fxx /128)
1 = sub system clock
Buzzer Signal Selection bits:
00 = 0.5 kHz buzzer (BUZ) signal output
01 = 1 kHz buzzer (BUZ) signal output
10 = 2 kHz buzzer (BUZ) signal output
11 = 4 kHz buzzer (BUZ) signal output
Watch Timer enable bit:
0 = Disable Watch Timer
1 = Enable Watch Timer
NOTE:
Fxx is assumed to be 4.195 MHz
Watch Timer interrupt enable bit :
0 = Disable watch timer interrupt
1 = enable watch timer interrupt
Watch Timer Speed Selection Bits:
00 = Set watch timer interrupt to 1.0S
01 = Set watch timer interrupt to 0.5S
10 = Set watch timer interrupt to 0.25S
11 = Set watch timer interrupt to 3.91mS
Figure 13-1. Watch Timer Control Register (WTCON)
S3C9484/C9488/F9488 WATCH TIMER
13-3
WATCH TIMER CIRCUIT DIAGRAM
Enable/Disable
WTCON.0
WTINT
WTCON.6
BUZZER Output
f
W
/2
15
f
W
/2
14
f
W
/2
13
f
W
/2
7
fxx = Selected clock between fx and fxt (4.195 MHz)
f
XT
= Subsystem Clock (32,768 Hz)
fw = Watch timer
WTCON.7 f
W
32.768 kHz
f
XT
fxx/128
f
LCD
(2 kHZ)
WTCON.5
WTCON.4
WTCON.3
WTCON.2
WTCON.1
MUX
Selector
Circuit
Frequency
Dividing
Circuit
Clock
Selector
fw/64 (0.5 kHz)
fw/32 (1 kHz)
fw/16 (2 kHz)
fw/8 (4 kHz)
Figure 13-1. Watch Timer Circuit Diagram
WATCH TIMER S3C9484/C9488/F9488
13-4
+ PROGRAMMING TIP – Using The WATCH TIMER Display (3.91ms,4kHz buzzer out)
.INCLUDE "C:\SKSTUDIO\INCLUDE\REG\S3C9488.REG"
VECTOR 00H,F9488_INT
.ORG 003CH
DB 0FFH
DB 0FFH
DB 01100000B ;DISABLE LVR
DB 00000011B ;SUB OSCILLATOR,BT OVERFLOW, RESET PIN ENALBE
.ORG 100H
RESET:
DI
LD WDTCON,#10101010B
LD BTCON,#0001011B
LD CLKCON,#00011000B
LD SP,#0C0H
LD SYM,#00H
LD OSCCON,#00000000B
LD P1CONL,#10100110B ;BUZZER OUTPUT
LD WTCON,#11111110B ;SUB SYSTEM CLOCK, 4KHz,3.91ms interval
EI
;================================================================================
MAIN JP MAIN
;================================================================================
F9488_INT TM WTCON,#01H ;CHECK WHAT INTERRUPT PENDING BIT IS SET
JP NZ,WATCH_T_INT
;..........
IRET
WATCH_T_INT
AND WTCON,#0FEH
XOR P1,#01H ;PORT TOGGLE WHENEVER INTERRUPT SERVICE
;ROUTINE IS EXECUTED
NOP
NOP
IRET
.END
S3C9484/C9488/F9488 LCD CONTROLLER/DRIVER
14-1
14 LCD CONTROLLER / DRIVER
OVERVIEW
The S3C9484/C9488/F9488 micro-controller can directly drive an up-to-19-digit (19-segment) LCD panel. The LCD
module has the following components:
—LCD controller/driver
—Display RAM (00H-12H) for storing display data in page 1
—19 segment output pins (SEG0 – SEG18)
—8 common output pins (COM0 - COM7)
Bit settings in the LCD control register, LCDCON, determine the LCD frame frequency, duty and bias, and the
segment pins used for display output. When a subsystem clock is selected as the LCD clock source, the LCD
display is enabled even during stop and idle modes.
The LCD Voltage control register LCDVOL switches contrast output to segment/port.
LCD data stored in the display RAM locations are transferred to the segment signal pins automatically without
program control.
LCD
Controller/
Driver
8
8-Bit Data Bus
8
19
COM0-COM7
SEG0-SEG18
Figure 14-1. LCD Function Diagram
LCD CONTROLLER/DRIVER S3C9484/C9488/F9488
14-2
LCD CIRCUIT DIAGRAM
COM0
COM7
f
LCD
SEGn
SEG4
SEG3
SEG2
SEG1
SEG0
NOTE:
f
LCD
= f
W
/2
4
, f
W
/2
5
, f
W
/2
6
, f
W
/2
7
8MUX 18
12H.7
12H.6
12H.5
12H.4
12H.3
12H.2
12H.1
12H.0
nH.7
nH.6
nH.5
nH.4
nH.3
nH.2
nH.1
nH.0
00H.7
00H.6
00H.5
00H.4
00H.3
00H.2
00H.1
00H.0
Segment
Driver
MUX n
MUX 0
SEG18
SEG17
SEG16
SEG15
SEG14
LCD
Voltage
Control
COM
Control
Timing
Controller
LCDCON
LCDVOL
8
8
8
8
Figure 14-2. LCD Circuit Diagram
S3C9484/C9488/F9488 LCD CONTROLLER/DRIVER
14-3
LCD RAM ADDRESS AREA
RAM addresses 00H-12H of page 1 are used as LCD data memory. When the bit value of a display segment is "1",
the LCD display is turned on; when the bit value is "0", the display is turned off.
Display RAM data are sent out through segment pins SEG0-SEG18 using a direct memory access (DMA) method
that is synchronized with the fLCD signal. If these RAM addresses not used for LCD display, you can be allocated to
general-purpose use.
SEG0
BIT7
BIT7
BIT6
BIT6
BIT1
BIT1
BIT0
BIT000H
01H SEG1
SEG17
BIT7
BIT7
BIT6
BIT6
BIT1
BIT1
BIT0
BIT011H
12H SEG18
COM0COM1COM6COM7
Figure 14-3. LCD Display Data RAM Organization
NOTE
In MDS(such as SK-1000), before changing PAGE(PAGE0 à PAGE1), you must disable global
interrupt(DI) and during accessing PAGE1, you don’t have to use “CALL” instruction.
LCD CONTROLLER/DRIVER S3C9484/C9488/F9488
14-4
LCD CONTROL REGISTER (LCDCON), D0H
The LCD control register LCDCON is mapped to RAM addresses D0H. LCDCON controls these LCD functions:
—LCD module enable/disable control (LCDCON.7)
—LCD Duty and Bias selection (LCDCON.5- LCDCON.4)
—LCD dot on/off control bit (LCDCON.3- LCDCON.2)
—LCD clock frequency selection (LCDCON.1- LCDCON.0)
The LCD clock signal determines the frequency of COM signal scanning of each segment output. This is also
referred to as the 'frame frequency’ Since LCD clock is generated by dividing the watch timer clock (fw), the watch
timer must be enabled when the LCD display is turned on. RESET clears the LCDCON register values to logic zero.
This produces the following LCD control settings:
—LCD clock frequency is the watch timer clock (fw)/27 = 256 Hz
The LCD display can continue to operate during idle and stop modes if a subsystem clock is used as the watch
timer source.
LCD Converter Control Register (LCDCON)
D0H, R/W, Reset: 00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
LCD module enable/disable bit:
0 = LCD module disable
1 = LCD module enable
LCD Duty and Bias
selection bits:
00 = 1/8 duty, 1/4 bias
01 = 1/4 duty, 1/3 bias
1x = static
LCD mode selection bits:
00 = Dot off signal
01 = Dot on signal
1x = Normal display
LCD Clock selection bits:
00 = (fw) / 27
01 = (fw) / 26
10 = (fw) / 25
11 = (fw) / 24
Not used
Figure 14-4. LCD Control Register (LCDCON)
S3C9484/C9488/F9488 LCD CONTROLLER/DRIVER
14-5
LCD VOLTAGE CONTROL REGISTER (LCDVOL)
The LCD Voltage control register LCDVOL is mapped to RAM addresses D1H.
LCDVOL is used to control the LCD contrast up to 16 step contrast level.
—LCD contrast control enable/disable bit (LCDVOL.7)
—LCD contrast segment output selection bits (LCDVOL.0 -LCDVOL.3)
LCD Voltage Control Register (LCDVOL)
D1H, R/W, Reset: 0FH
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Segment/Port output selection bits:
0000 = 1/16 step (The dimmest level)
0001 = 2/16 step
0010 = 3/16 step
0011 = 4/16 step
- - - - -
1110 = 15/16 step
1111 = 16/16 step
LCD contrast Control
enable/disable bit:
0 = Disable LCD
contrast control
1 = Enable LCD
contrast control
Not used
Figure 14-5. LCD Drive Voltage Control Register (LCDVOL)
LCD CONTROLLER/DRIVER S3C9484/C9488/F9488
14-6
NOTE:
When LCDVOL.7 is logic one, you can control LCD contrast by writing data
to LCDVOL.3-.0
Figure 14-6. Internal Voltage Dividing Resistor Connection (1/4 Bias, Display On)
S3C9484/C9488/F9488 LCD CONTROLLER/DRIVER
14-7
NOTE:
When LCDVOL.7 is logic one, you can control LCD contrast by writing data
to LCDVOL.3-.0
Figure 14-7. Internal Voltage Dividing Resistor Connection (1/3 Bias, Display On)
LCD CONTROLLER/DRIVER S3C9484/C9488/F9488
14-8
LCD DRIVE VOLTAGE
The LCD display is turned on only when the voltage difference between the common and segment signals is greater
than VLCD. The LCD display is turned off when the difference between the common and segment signal voltages is
less than VLCD. The turn-on voltage, + VLCD or - VLCD, is generated only when both signals are the selected signals
of the bias. Table 14-1 shows LCD drive voltages level for static mode, 1/3 bias, 1/4 bias.
Table 14-1. LCD Drive Bias Voltages Level Values
LCD Power Supply Static Mode 1/3 Bias 1/4 Bias
VLC4 VLCD –VLCD
VLC3 –VLCD 3/4 VLCD
VLC2 –2/3 VLCD 2/4 VLCD
VLC1 –1/3 VLCD 1/4 VLCD
VSS 0 V 0 V 0 V
NOTE: The LCD panel display may be deteriorated if a DC voltage is applied that lies between the common and segment
signal voltage. Therefore, always drive the LCD panel with AC voltage.
S3C9484/C9488/F9488 LCD CONTROLLER/DRIVER
14-9
LCD SEG/COM SIGNALS
The 19 LCD segment signal pins are connected to corresponding display RAM locations at 00H-12H. Bits 0-7 of the
display RAM are synchronized with the common signal output pins COM0, . . . . , and COM7.
When the bit value of a display RAM location is "1", a select signal is sent to the corresponding segment pin. When
the display bit is "0", a 'no-select' signal is sent to the corresponding segment pin. Each bias has select and no-
select signals.
LCD
Clock
Select Non-Select
COM V
LC4
V
ss
SEG
COM-SEG
V
LC4
V
ss
V
LC4
V
ss
-V
LC4
1 Frame
Figure 14-8. Select/No-Select Bias Signals in Static Display Mode
LCD
Clock
Select Non-Select
1 Frame
V
LC3
V
SS
V
LC2
V
LC1
V
LC3
V
SS
V
LC2
V
LC1
COM
SEG
COM-SEG
V
LC3
V
SS
V
LC2
V
LC1
-V
LC1
-V
LC2
-V
LC3
Figure 14-9. Select/No-Select Bias Signals in 1/4 Duty, 1/3 Bias Display Mode
LCD CONTROLLER/DRIVER S3C9484/C9488/F9488
14-10
LCD
Clock
Select Non-Select
1 Frame
V
LC3
V
SS
V
LC2
V
LC1
V
LC3
V
SS
V
LC2
V
LC1
COM
SEG
COM-SEG
V
LC3
V
SS
V
LC2
V
LC1
-V
LC1
-V
LC2
-V
LC3
V
LC4
V
LC4
V
LC4
-V
LC4
Figure 14-10. Select/No-Select Bias Signals in 1/8 Duty, 1/4 Bias Display Mode
S3C9484/C9488/F9488 LCD CONTROLLER/DRIVER
14-11
V
LC4
V
SS
V
LC1
COM0
COM1
COM3
SEG0
COM0
-SEG0
COM0
-SEG1
COM1
-SEG1
COM2
FR
SEG1
COM1
-SEG0
SEG0.7 x C7
SEG0.1 x C1 SEG0.4 x C4
COM0
COM7
Data Register page 1,
Address 00H
LD 00H, #5Dh SEG0
0 1 32 4 5 76
1 Frame
0 1 32 4 5 76
V
LC3
V
LC2
V
LC4
V
SS
V
LC1
V
LC3
V
LC2
V
LC4
V
SS
V
LC1
V
LC3
V
LC2
-V
LC1
-V
LC2
-V
LC3
-V
LC4
COM7
SEG0.2 x C2
SEG0.6 x C6
SEG0.3 x C3
SEG0.5 x C5
SEG0.0 x C0
.0 .1 .2 .3 .4 .5 .6 .7
COM1
COM3
COM2
COM4
COM6
COM5
SEG1
.0 .1 .2 .3 .4 .5 .6 .7
Data Register page1,
Address 01H
LD 01H, #2Eh
1 0 1 1 0 1 01
0 1 1 0 1 0 01
V
LC4
V
SS
V
LC1
V
LC3
V
LC2
V
LC4
V
SS
V
LC1
V
LC3
V
LC2
V
LC4
V
SS
V
LC1
V
LC3
V
LC2
V
LC4
V
SS
V
LC1
V
LC3
V
LC2
-V
LC1
-V
LC2
-V
LC3
-V
LC4
V
LC4
V
SS
V
LC1
V
LC3
V
LC2
-V
LC1
-V
LC2
-V
LC3
-V
LC4
V
LC4
V
SS
V
LC1
V
LC3
V
LC2
-V
LC1
-V
LC2
-V
LC3
-V
LC4
Figure 14-11. LCD Signal and Wave Forms Example in 1/8 Duty, 1/4 Bias Display Mode
LCD CONTROLLER/DRIVER S3C9484/C9488/F9488
14-12
1 Frame
V
SS
V
LC1
COM0
COM1
COM3
SEG0
COM0
-SEG0
COM0
-SEG1
COM1
-SEG1
COM2
FR
SEG1
COM1
-SEG0
SEG1.3 x C3
SEG0.0 x C0 SEG0.2 x C2
COM0
Data Register page 1,
Address 00H
LD 00H, #0Eh SEG0
0 1 32
V
LC3
V
LC2
V
SS
V
LC1
V
LC3
V
LC2
-V
LC1
-V
LC2
-V
LC3
SEG1.1 x C1
SEG0.3 x C3
SEG0.1 x C1
SEG1.2 x C2
SEG1.0 x C0
.0 .1 .2 .3 .4 .5 .6 .7
COM1
COM3
COM2
SEG2
.0 .1 .2 .3 .4 .5 .6 .7
Data Register page 1,
Address 02H
LD 02H, #03h
0 1 32
V
SS
V
LC1
V
LC3
V
LC2
V
SS
V
LC1
V
LC3
V
LC2
V
SS
V
LC1
V
LC3
V
LC2
V
SS
V
LC1
V
LC3
V
LC2
V
SS
V
LC1
V
LC3
V
LC2
-V
LC1
-V
LC2
-V
LC3
V
SS
V
LC1
V
LC3
V
LC2
-V
LC1
-V
LC2
-V
LC3
V
SS
V
LC1
V
LC3
V
LC2
-V
LC1
-V
LC2
-V
LC3
.0 .1 .2 .3 .4 .5 .6 .7
0 1 1 x x x x1
1 1 0 x x x x0
1 1 0 x x x x0
0 1 1 x x x x0
SEG1
.0 .1 .2 .3 .4 .5 .6 .7
SEG3
Data Register page 1,
Address 01H
LD 01H, #03h
Data Register page12,
Address 03H
LD 03H, #06h
Figure 14-12. LCD Signals and Wave Forms Example in 1/4 Duty, 1/3 Bias Display Mode
S3C9484/C9488/F9488 LCD CONTROLLER/DRIVER
14-13
+ PROGRAMMING TIP – Using The LCD Display
.INCLUDE "C:\SKSTUDIO\INCLUDE\REG\S3C9488.REG"
LCD_DATA0_P1 .EQU 00H
.ORG 003CH
DB 0FFH
DB 0FFH
DB 01100000B
DB 00000011B ;Smart Option setting
.ORG 100H
RESET:
DI
LD WDTCON,#10101010B
LD BTCON,#0001011B
LD CLKCON,#00011000B
LD SP,#0C0H
LD SYM,#00H
LD OSCCON,#00000000B
LD LCDCON,#10001000B ;1/8 duty,1/4 bias,fw/128
LD LCDVOL,#10001111B ;lcd contrast enable,16/16 step
LD P0CONH,#0FFH ;COM4-COM7
LD P0CONL,#11101010B
LD P1CONH,#0FFH ;COM0-COM3
LD P1PUR,#00H
LD P2CONH,#0FFH ;SEG7-SEG10
LD P2CONL,#0FFH ;SEG3-SEG6
LD P3CONH,#10101011B ;SEG18
LD P3CONL,#11111111B ;SEG15-SEG17
LD P4CONH,#00111111B ;SEG12-SEG14
LD P4CONL,#0FFH ;SEG0-SEG2,SEG11
LD WTCON,#02H ;Watch Timer enable
;================================================================================
LCD CONTROLLER/DRIVER S3C9484/C9488/F9488
14-14
MAIN
LD SYM,#01H ;SELECT PAGE1
LD R0,#LCD_DATA0_P1 ;LOAD LCD DISPLAY DATA RAM0
LD R2,#0
LD R3,#0
LOOP LDC R1,#LCD_DATA[RR2]
LD @R0,R1
INC R0
INC R3
CP R3,#13H
JP C,LOOP
LD SYM,#00H ;SELECT PAGE0
JP $
LCD_DATA .DB 00H,48H,34H,0D0H,22H,11H,89H,0E2H,35H,0FFH
.DB 77H,33H,67H,99H,46H,0F1H,4H,88H,54H
;================================================================================
.END
S3C9484/C9488/F9488 A/D CONVERTER
15-1
15 10-BIT ANALOG-TO-DIGITAL CONVERTER
OVERVIEW
The 10-bit A/D converter (ADC) module uses successive approximation logic to convert analog levels entering at one
of the nine input channels to equivalent 10-bit digital values. The analog input level must lie between the AVREF and
VSS values. The A/D converter has the following components:
—Analog comparator with successive approximation logic
—D/A converter logic (resistor string type)
—ADC control register (ADCON)
— Nine multiplexed analog data input pins (AD0 – AD8) , alternately digital data I/O port
—10-bit A/D conversion data output register (ADDATAH/L)
—AVREF pins, AVSS is internally connected to VSS
FUNCTION DESCRIPTION
To initiate an analog-to-digital conversion procedure, at the first you must set port control register(P0CONH/
P0CONL/P1CONL) for AD analog input. And you write the channel selection data in the A/D converter control
register ADCON.4-.6 to select one of the eight analog input pins (AD0-8) and set the conversion start bit, ADCON.0.
The read-write ADCON register is located at address FCH. The unused pin can be used for normal I/O.
During a normal conversion, ADC logic initially set the successive approximation register to 200H (the approximate
half-way point of an 10-bit register). This register is then updated automatically during each conversion step. The
successive approximation block performs 10-bit conversions for one input channel at a time. You can dynamically
select different channels by manipulating the channel selection bit value (ADCON.7 - 4) in the ADCON register. To
start the A/D conversion, you should set the enable bit, ADCON.0. When a conversion is completed, the end-of-
conversion (EOC) bit is automatically set to 1 and the result is dumped into the ADDATAH/L register where it can be
read. The A/D converter then enters an idle state. Remember to read the contents of ADDATAH/L before another
conversion starts. Otherwise, the previous result will be overwritten by the next conversion result.
NOTE
Because the A/D converter does not use sample-and-hold circuitry, it is very important that fluctuation in
the analog level at the AD0-AD8 input pins during a conversion procedure be kept to an absolute minimum.
Any change in the input level, perhaps due to noise, will invalidate the result. If the chip enters to STOP or
IDLE mode in conversion process, there will be a leakage current path in A/D block. You must use
STOP or IDLE mode after ADC operation is finished.
A/D CONVERTER S3C9484/C9488/F9488
15-2
CONVERSION TIMING
The A/D conversion process requires 4 steps (4 clock edges) to convert each bit and 10 clocks to set-up A/D
conversion. Therefore, total of 50 clocks are required to complete an 10-bit conversion: When Fxx/8 is selected for
conversion clock with an 8 MHz fxx clock frequency, one clock cycle is 1 us. Each bit conversion requires 4 clocks,
the conversion rate is calculated as follows:
4 clocks/bit × 10 bits + set-up time = 50 clocks, 50 clock × 1us = 50 us at 1 MHz
A/D CONVERTER CONTROL REGISTER (ADCON)
The A/D converter control register, ADCON, is located at address FCH. It has three functions:
—Analog input pin selection (bits 4, 5, 6, and 7)
—A/D conversion End-of-conversion (EOC) status (bit 3)
—A/D conversion speed selection (bits 1,2)
—A/D operation start (bit 0)
After a reset, the start bit is turned off. You can select only one analog input channel at a time. Other analog input
pins (ADC0–ADC8) can be selected dynamically by manipulating the ADCON.4–6 bits. And the pins not used for
analog input can be used for normal I/O function.
A/D Converter Control Register (ADCON)
FCH, R/W
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
A/D input pin selection bits:
0000 = ADC0
0001 = ADC1
0010 = ADC2
0011 = ADC3
0100 = ADC4
0101 = ADC5
0110 = ADC6
0111 = ADC7
1000 = ADC8
Other values = Connected with GND internally
A/D conversion start bit:
0 = Disable operation
1 = Start operation (Auto-clear)
Clock source selection bits:
00 = fxx/16 (fosc = 8MHz)
01 = fxx/ 8 (fosc = 8MHz)
10 = fxx/ 4 (fosc = 8MHz)
11 = fxx (fosc = 4MHz)
End-of-conversion(ECO) status bit:
0 = A/D conversion is in progress
1 = A/D conversion complete
Maximum ADC clock input = 4MHz
Figure 15-1. A/D Converter Control Register (ADCON)
S3C9484/C9488/F9488 A/D CONVERTER
15-3
Conversion Data Register High Byte (ADDATAH)
FAH, Ready only
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Conversion Data Register Low Byte (ADDATAL)
FBH, Ready only
LSBMSB xxxxxx.1 .0
Figure 15-2. A/D Converter Data Register (ADDATAH/L)
INTERNAL REFERENCE VOLTAGE LEVELS
In the ADC function block, the analog input voltage level is compared to the reference voltage. The analog input level
must remain within the range VSS to AVREF (usually, AVREF = VDD).
Different reference voltage levels are generated internally along the resistor tree during the analog conversion process
for each conversion step. The reference voltage level for the first conversion bit is always 1/2 AVREF.
A/D CONVERTER S3C9484/C9488/F9488
15-4
BLOCK DIAGRAM
- A/D Converter Control Register
ADCON (FCH)
ADCON.7-.4
M
U
L
T
I
P
L
E
X
E
R
Control
Circuit
+
-
D/A Converter V
DD
V
SS
Successive
Approximation
Circuit
Analog
Comparator
Clock
Selector
ADCON.0 (ADC Start)
ADCON.2-.1
Conversion Result
ADDATAH
(FAH) ADDATAL
(FBH)
To data bus
ADCON.3
(EOC Flag)
ADC0/P1.3
ADC1/P1.2
ADC2/P1.1
ADC7/P0.4
ADC8/P0.3
Figure 15-3. A/D Converter Functional Block Diagram
S3C9484/C9488/F9488 A/D CONVERTER
15-5
INTERNAL A/D CONVERSION PROCEDURE
1. Analog input must remain between the voltage range of VSS and AVREF.
2. Configure P0.3–P0.7 and P1.0–P1.3 for analog input before A/D conversions. To do this, you have to load the
appropriate value to the P0CONH, P0CONL and P1CONL (for ADC0–ADC8) registers.
3. Before the conversion operation starts, you must first select one of the eight input pins (ADC0–ADC8) by writing
the appropriate value to the ADCON register.
4. When conversion has been completed, (50 clocks have elapsed), the EOC, ADCON.3 flag is set to "1", so that
a check can be made to verify that the conversion was successful.
5. The converted digital value is loaded to the output register, ADDATAH (8-bit) and ADDATAL (2-bit), then the ADC
module enters an idle state.
6. The digital conversion result can now be read from the ADDATAH and ADDATAL register.
V
DD
103
Reference
Voltage
Input
S3C9484/C9488/
F9488
AV
SS
AV
REF
ADC0-ADC8
V
DD
C
101C
Analog
Input Pin
10pF
NOTE:
The symbol 'R' signifies an offset resistor with a value of from 50 to 100.
If this resistor is omitted, the absolute accuracy will be maximum of 3 LSBs.
Figure 15-4 Recommended A/D Converter Circuit for Highest Absolute Accuracy
A/D CONVERTER S3C9484/C9488/F9488
15-6
NOTES
S3C9484/C9488/F9488 WATCHDOG TIMER
16-1
16 WATCHDOG TIMER
OVERVIEW
WHATCHDOG TIMER
You can use the watchdog timer :
—Watchdog timer provides an automatic reset mechanism with counter clock source of internal RC ring oscillation
or basic timer overflow signal.
—Watchdog timer can run in unintentional STOP/IDLE mode with internal RC ring oscillator. This prevents MCU
from remaining in the abnormal STOP/IDLE mode.
The functional components of the watchdog timer block are:
—Internal RC oscillation or basic timer overflow signal.
—Smart Option 3FH.1 selects counter clock source, 16bit watchdog timer overflow condition (bit15 OVF with
internal ring oscillator or bit3 OVF with basic timer overflow). Also, on STOP and IDLE mode with internal RC
ring oscillator, watchdog timer counter is not cleared by smart option.
—Watchdog timer control register, WDTCON (E5H, read/write)
—16bit Watchdog Timer Counter
WATCHDOG TIMER CONTROL REGISTER (WDTCON)
Watchdog Timer Control Register (WDTCON)
E5H, R/W, Reset: 00H
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Watchdog timer enable bits:
1010B = Disable watchdog function
Other value = Enable watchdogfunction
Watchdog timer counter clear bits:
1010B = Clear watchdog timer counter
Other value = don't care
Figure 16-1. Watchdog Timer Control Register (WDTCON)
WATCHDOG TIMER S3C9484/C9488/F9488
16-2
WATCHDOG TIMER FUNCTION DESCRIPTION
Watchdog Timer Function
You can program the watchdog timer overflow signal (WDTOVF) to generate a reset by setting WDTCON.7-.4 to any
value other than "1010B". (The "1010B" value disables the watchdog function.) A reset clears WDTCON to "00H",
automatically enabling the watchdog timer function.
The MCU is reset whenever a watchdog timer counter overflow occurs, During normal operation, the application
program must prevent from the overflow, To do this, the WDTCNT value must be cleared (by writing a “1010¡± to
WDTCON.0-.3) at regular intervals.
If a malfunction occurs due to noise or some other error conditions, the watchdog counter clear operation will not be
executed by chip malfunction. So, before long, a watchdog timer overflow reset will occur. After this reset, chip will
carry out normal operation again. In other words, during the normal operation, the watchdog timer overflow (bit 3
overflow or bit 15 overflow of the 16-bit watchdog timer counter, WDTCNT) does not occur by a 16bit Watchdog timer
counter clear operation.
Watchdog Timer Counter Clock Sources Selection
You can select counter clock source between basic timer overflow signal and internal RC ring oscillator.
If you use basic timer overflow clock source, WDT overflow will occur at the time when counter bit 3 is set. If you use
internal RC ring oscillator clock source, WDT overflow will occur at the time when counter bit 15 is set.
Watchdog Timer in STOP/IDLE mode
1. If the basic timer overflow signal is selected for the WDT counter clock source, WDT will be disabled
automatically by hardware. So system reset can not occur by WDT. WDT counter is cleared automatically in
STOP/IDLE mode. In this case, current consumption is very small.
2. If internal RC ring oscillator is selected for the WDT counter clock source, WDT can be enabled in unintentional
STOP/IDLE mode. So system reset can occur by WDT. WDT counter is not cleared in STOP/IDLE mode. So,
when abnormal STOP or IDLE mode occurs by noise, MCU can be returned to normal operation by WDT
overflow reset. But, at this case, STOP/IDLE mode current consumption becomes larger. If noise problem (like
chip entering to unintentional STOP/IDLE mode) is more important, you had better use internal RC ring
oscillator.
Before running system, you must select Smart Option (3FH.1) for WDT counter source.
If you select internal RC oscillator, normally, you must set Watchdog Timer to be disable before entering to STOP
mode. Because, If WDT is not disabled, reset operation will occur by WDT counter overflow.
If you want to use WDT in STOP/IDLE mode for noise problem, current may drain too much by internal RC
oscillation. So, if noise issue is not important, you had better select basic timer overflow signal for WDT counter
clock source.
Watchdog Timer Counter Overflow Time for Reset
1. If the basic timer overflow signal is selected for the WDT counter clock source and main clock, Fxx, is 8MHz,
Basic Timer Clock Fxx/128 Fxx/1024 Fxx/4096
Time for WDT overflow 32.76msec 262msec 1.05sec
2. If internal RC ring oscillator is selected for the WDT counter clock source,
Timer for WDT overflow = (1/3.47)µ sec X 216 = 18.89msec
S3C9484/C9488/F9488 WATCHDOG TIMER
16-3
RC
3.47MHz
Ring OSC
Bit 3
OVF
RESET
RESET
WDTCON
.7-.4 16bit Watchdog Timer
Up-Counter
M
U
X
Smart
Option
3FH.1
M
U
X
Basic Timer
OVF
WDTCON
.7-.4
Bit 15
OVF
WDTCON
.3 -.0 MUX
MUX
Smart
Option
3FH.1
IDLE
STOP
Figure 16-2. Watchdog Timer Block Diagram
WATCHDOG TIMER S3C9484/C9488/F9488
16-4
NOTES
S3C9484/C9488/F9488 VOLTAGE LEVEL DETECTOR
17-1
17 VOLTAGE LEVEL DETECTOR
OVERVIEW
The S3C9484/C9488/F9488 micro-controller has a built-in VLD(Voltage Level Detector) circuit which allows detection
of power voltage drop through software. Turning the VLD operation on and off can be controlled by software. Because
the IC consumes a large amount of current during VLD operation. It is recommended that the VLD operation should
be kept OFF unless it is necessary. Also the VLD criteria voltage can be set by the software. The criteria voltage can
be set by matching to one of the 3 kinds of voltage 2.4V, 2.7V, 3.3V or 3.9V (VDD reference voltage).
The VLD block works only when VLDCON.0 is set. If VDD level is lower than the reference voltage selected with
VLDCON.5-.1, VLDCON.6 will be set. If VDD level is higher, VLDCON.6 will be cleared. Please do not operate the
VLD block for minimize power current consumption.
Reference voltage selection bit
10110 = 2.4 V
10011 = 2.7 V
01110 = 3.3 V
01011 = 3.9 V
VLD operation enable bit
0 = Operation off
1 = Operation on
Voltage level set bit (read only)
0 = VDD is higher than reference voltage
1 = VDD is lower than reference voltage
Voltage Level Detector Control Register (VLDCON)
D8H, R/W,Bit6 read-only, Reset value:2CH
LSBMSB .7 .6 .5 .4 .3 .2 .1 .0
Not used
Figure 17-1. VLD Control Register (VLDCON)
VOLTAGE LEVEL DETECTOR S3C9484/C9488/F9488
17-2
Voltage
Level
Detector VLD out
VDD Pin
Voltage
Level
Setting
VLDCON.6
VLDCON.0
VLDCON.5~
VLDCON.1
VLD run
Set the level
Figure 17-2. Block Diagram for Voltage Level Detect
S3C9484/C9488/F9488 VOLTAGE LEVEL DETECTOR
17-3
VOLTAGE LEVEL DETECTOR CONTROL REGISTER (VLDCON)
The bit 0 of VLDCON controls to run or disable the operation of Voltage level detector. Basically this VVLD is set as
2.4 V by system reset and it can be changed in 4 kinds voltages by selecting Voltage Level Detector Control
register(VLDCON). When you write 5 bit data value to VLDCON, an established resistor string is selected and the
VVLD is fixed in accordance with this resistor. Table 17-1 shows specific VVLD of 3 levels.
+
-
VREF BGR
VREF
VIN
VDD
Comparator
VDD
Voltage Level Detector Control Register (VLDCON)
D8H, R/W,Bit6 read-only, Reset value:2CH
LSB.7 .6 .5 .4 .3 .2 .1 .0
Figure 17-2. Voltage Level Detect Circuit and Control Register
Table 17-1. VLDCON Value and Detection Level
VLDCON .5-.1 VVLD
10110 2.4 V
10011 2.7 V
01110 3.3 V
01011 3.9 V
NOTE: VLDCON reset value is 2CH .
VOLTAGE LEVEL DETECTOR S3C9484/C9488/F9488
17-4
VOLTAGE(VDD) LEVEL DETECTION SEQUENCE - VLD USAGE
STEP 0: Don’t make VLD on in normal conditions for small current consumption.
STEP 1: For initializing analog comparator, write #3Fh to VLDCON. (Comparator initialization, VLD enable)
STEP 2: Write value to reference voltage setting bits in VLDCON. (Voltage setting, VLD enable)
STEP 3: Wait 10~20usec for comparator operation time. (Wait compare time)
STEP 4: Check result by loading voltage level set bit in VLDCON. (Check result)
STEP 5: For another measurement, repeat above steps.
PROGRAMING TIP
LD VLDCON,#3FH ;Comparator initialization,VLD enable (STEP 1)
LD VLDCON,#00011101B ;3.3V detection voltage setting, VLD enable (STEP 2)
NOP
NOP
NOP
•; Wait 10~20usec (STEP 3)
•
•
LD R0, VLDCON ;Load VLDCON to R0 (STEP 4)
TM R0, #01000000B ; Check bit6 of R0. If bit6 is “H”, VDD is lower than 3.3V.
JP NZ, LOW_VDD ; If not zero(bit 6 is “H”), jump to “LOW_VDD” routine.
Table 17-2. Characteristics of Voltage Level Detect Circuit (TA = 25 °C)
Parameter Symbol Conditions Min Typ Max Unit
Operating Voltage VDDVLD 1.5 –5.5 V
Detection Voltage VVLD VLDCON.5–.1 = 10110b 2.0 2.4 2.8
VLDCON.5–.1 = 10011b 2.3 2.7 3.1
VLDCON.5–.1 = 01110b 2.9 3.3 3.7
VLDCON.5–.1 = 01011b 3.5 3.9 4.3
Current consumption IVLD VLD on VDD = 5.5 V – 65 100 uA
VDD = 3.0 V 45 80
S3C9484/C9488/F9488 VOLTAGE LEVEL DETECTOR
17-5
S3C9484/C9488/F9488 LOW VOLTAGE RESET
18-1
18 LOW VOLTAGE RESET
OVERVIEW
The S3C9484/C9488/F9488 can be reset in four ways:
—by external power-on-reset
—by the external reset input pin pulled low
—by the digital watchdog timing out
—by the Low Voltage reset circuit (LVR)
During an external power-on reset, the voltage VDD is High level and the RESETB pin is forced Low level. The
RESETB signal is input through a Schmitt trigger circuit where it is then synchronized with the CPU clock. This
brings the S3C9484/C9488/F9488 into a known operating status. To ensure correct start-up, the user should take
that reset signal is not released before the VDD level is sufficient to allow MCU operation at the chosen frequency.
The RESETB pin must be held to Low level for a minimum time interval after the power supply comes within
tolerance in order to allow time for internal CPU clock oscillation to stabilize. The minimum required oscillation
stabilization time for a reset is approximately 8.19 ms (≅216/fosc, fosc= 8MHz).
When a reset occurs during normal operation (with both VDD and RESETB at High level), the signal at the RESETB
pin is forced Low and the reset operation starts. All system and peripheral control registers are then set to their
default hardware reset values (see Table 8-1).
The MCU provides a watchdog timer function in order to ensure graceful recovery from software malfunction. If
watchdog timer is not refreshed before an end-of-counter condition (overflow) is reached, the internal reset will be
activated.
The S3C9484/C9488/F9488 has a built-in low voltage reset circuit that allows detection of power voltage drop of
external VDD input level to prevent a MCU from malfunctioning in an unstable MCU power level. This voltage detector
works for the reset operation of MCU. This Low Voltage reset includes an analog comparator and Vref circuit. The
value of a detection voltage is set internally by hardware. The on-chip Low Voltage Reset, features static reset when
supply voltage is below a reference voltage value (you did select at smart option 3FH). Thanks to this feature,
external reset circuit can be removed while keeping the application safety. As long as the supply voltage is below the
reference value, there is an internal and static RESET. The MCU can start only when the supply voltage rises over
the reference voltage.
When you calculate power consumption, please remember that a static current of LVR circuit should be added a
CPU operating current in any operating modes such as Stop, Idle, and normal RUN mode.
LOW VOLTAGE RESET S3C9484/C9488/F9488
18-2
+
-
V
REF
BGR
V
DD
V
REF
V
IN
V
DD
N.F
Internal System
RESETB
When the VDD level
is lower than 2.7V
Comparator
NOTES:
1. The target of voltage detection level is that you did select at smart option 3EH.
2. BGR is Band Gap voltage Reference
Longger than 1us
N.F
RESET
Watchdog RESET
Longger than 1us
Smart Option 3EH.7
Smart Option 3EH.7
Smart Option 3FH.0
Figure 18-1. Low Voltage Reset Circuit
NOTE
To program the duration of the oscillation stabilization interval, you make the appropriate settings to the
basic timer control register, BTCON, before entering Stop mode. Also, if you do not want to use the
watchdog function (which causes a system reset if a watchdog timer counter overflow occurs), you can
disable it by writing '1010B' to the upper nibble of WDTCON.
S3C9484/C9488/F9488 ELECTRICAL DATA
19-1
19 ELECTRICAL DATA
OVERVIEW
In this chapter, S3C9484/C9488/F9488 electrical characteristics are presented in tables and graphs.
The information is arranged in the following order:
—Absolute maximum ratings
—Input/output capacitance
—D.C. electrical characteristics
—A.C. electrical characteristics
—Oscillation characteristics
—Oscillation stabilization time
—Data retention supply voltage in stop mode
—A/D converter electrical characteristics
ELECTRICAL DATA S3C9484/C9488/F9488
19-2
Table 19-1. Absolute Maximum Ratings
(TA= 25 °C)
Parameter Symbol Conditions Rating Unit
Supply voltage VDD – 0.3 to +6.5 V
Input voltage VI– 0.3 to VDD + 0.3
Output voltage VO– 0.3 to VDD + 0.3
Output current high IOH One I/O pin active – 18 mA
All I/O pins active – 60
Output current low IOL One I/O pin active +30
Total pin current for port +100
Operating temperature TA– 25 to + 85 °C
Storage temperature TSTG – 65 to + 150
Table 19-2. D.C. Electrical Characteristics
(TA = -25 °C to + 85 °C, VDD = 2.2 V to 5.5 V)
Parameter Symbol Conditions Min Typ Max Unit
Operating voltage VDD fCPU = 8 MHz 2.7 –5.5 V
fCPU = 4 MHz 2.2 5.5
Input high voltage VIH1 All input pins except VIH2 0.8 VDD VDD
VIH2 XIN, XTIN VDD-0.5
Input low voltage VIL1 All input pins except VIL2 –0.2 VDD
VIL2 XIN, XTIN 0.5
S3C9484/C9488/F9488 ELECTRICAL DATA
19-3
Table 19-2. D.C. Electrical Characteristics (Continued)
(TA = -25 °C to + 85 °C, VDD = 2.2 V to 5.5 V)
Parameter Symbol Conditions Min Typ Max Unit
Output high voltage VOH1 VDD = 2.4 V; IOH = -4 mA
P1.0-P1.1 and P3.4-P3.6 VDD - 0.7 VDD - 0.3 –V
VOH2 VDD = 5 V; IOH = -4 mA
Port 2 VDD - 1.0 – –
VOH3 VDD = 5 V; IOH = -1 mA
Normal output pins VDD - 1.0 – –
Output low voltage VOL1 VDD = 2.4 V; IOL = 12 mA
P1.0-P1.1 and P3.4-P3.6 0.3 0.5
VOL2 VDD = 5 V; IOL = 15 mA
Port 2 0.4 2.0
VOL3 VDD = 5 V; IOL = 4 mA
Normal output pins –0.4 2.0
Input high leakage current ILIH1 VIN = VDD
All input pins except ILIH2
– – 3 µA
ILIH2 VIN = VDD, XIN, XTIN 20
Input low leakage current ILIL1 VIN = 0 V
All input pins except ILIL2
– – -3
ILIL2 VIN = 0 V, XIN, XTIN -20
Output high leakage
current ILOH VOUT = VDD
All I/O pins and Output pins – – 3
Output low leakage
current ILOL VOUT = 0 V
All I/O pins and Output pins – – -3
Oscillator feed back
resistors ROSC1 VDD = 5.0 V, TA = 25 °C
XIN = VDD, XOUT = 0 V 800 1000 1200 kΩ
Pull-up resistor RL1 VIN = 0 V; VDD = 5 V ±10 %
Port 0,1,2,3,4 TA = 25°C25 50 100
COM output
voltage deviation VDC VDD = VLC4 = 5 V
(VLC4-COMi)
IO = ± 15 p-
µ
A (i = 0-7)
–± 45 ± 90 mV
SEG output
voltage deviation VDS VDD = VLC4 = 5 V
(VLC4-SEGi)
IO = ± 15 p-
µ
A (i = 0-18)
–± 45 ± 90
ELECTRICAL DATA S3C9484/C9488/F9488
19-4
Table 19-2. D.C. Electrical Characteristics (Concluded)
(TA = -25 °C to + 85 °C, VDD = 2.2V to 5.5 V)
Parameter Symbo
lConditions Min Typ Max Unit
LCD Voltage Dividing
Resister RLCD _40 75 100 kΩ
VLC3 OUTPUT VOLTAGE VLC3 VDD=1.8V to 5.5V, 1/4 bias
LCD clock=0Hz, VLC4=VDD
0.75VDD-0.2 0.75VDD 0.75VDD+0.2 V
VLC2 OUTPUT VOLTAGE VLC2 0.5VDD-0.2 0.5VDD 0.5VDD+0.2 V
VLC1 OUTPUT VOLTAGE VLC1 0.25VDD-0.2 0.25VDD 0.25VDD+0.2 V
Supply current (1) IDD1 (2) VDD = 5 V ± 10 %
8 MHz crystal oscillator – 12 25 mA
4 MHz crystal oscillator 4 10
VDD = 3 V ± 10 %
8 MHz crystal oscillator 3 8
4 MHz crystal oscillator 1 5
IDD2 Idle mode: VDD = 5 V ± 10 %
8 MHz crystal oscillator 3 10
4 MHz crystal oscillator 1.5 4
Idle mode: VDD = 3 V± 10 %
8 MHz crystal oscillator 1.2 3
4 MHz crystal oscillator 1.0 2.0
IDD3 Sub operating: main-osc stop
VDD = 3 V ± 10 %
32768 Hz crystal oscillator
40 80 µA
IDD4 Sub idle mode: main osc stop
VDD = 3 V ± 10 %
32768 Hz crystal oscillator
7 14
IDD5 Main stop mode : sub-osc stop
VDD = 5 V ± 10 %, TA = 25 °C1 3
VDD = 3 V ± 10 %, TA = 25 °C0.5 2
NOTES:
1. Supply current does not include current drawn through internal pull-up resistors or external output current loads.
2. IDD1 and IDD2 include a power consumption of subsystem oscillator.
3. IDD3 and IDD4 are the current when the main system clock oscillation stop and the subsystem clock is used.
And they does not include the LCD and Voltage booster and voltage level detector current.
4. IDD5 is the current when the main and subsystem clock oscillation stop.
5. Voltage booster’s operating voltage rage is 2.0V to 5.5V.
6. If you use LVR module, supply current increase. (refer to Table 19-12)
S3C9484/C9488/F9488 ELECTRICAL DATA
19-5
Table 19-3. A.C. Electrical Characteristics
(TA = -25 °C to +85 °C, VDD = 2.2 V to 5.5 V)
Parameter Symbol Conditions Min Typ Max Unit
Interrupt input
high, low width
(P3.3–P3.6)
tINTH,
tINTL
P3.3–P3.6, VDD = 5 V 200 – – ns
RESET input low
width tRSL VDD = 5 V 1.5 – – µS
NOTE: User must keep more large value then min value.
t
INTL
0.8 V
DD
0.2 V
DD
t
INTH
0.2 V
DD
Figure 19-1. Input Timing for External Interrupts (P3.3–P3.6)
RESET
t
RSL
0.2 V
DD
Figure 19-2. Input Timing for RESET
ELECTRICAL DATA S3C9484/C9488/F9488
19-6
Table 19-4. Input/Output Capacitance
(TA = -25 °C to +85 °C, VDD = 0 V )
Parameter Symbol Conditions Min Typ Max Unit
Input
capacitance CIN f = 1 MHz; unmeasured pins
are returned to VSS
– – 10 pF
Output
capacitance COUT
I/O capacitance CIO
Table 19-5. Data Retention Supply Voltage in Stop Mode
(TA = -25 °C to + 85 °C)
Parameter Symbol Conditions Min Typ Max Unit
Data retention
supply voltage VDDDR 2 – 5.5 V
Data retention
supply current IDDDR VDDDR = 2 V ––3µA
Execution of
STOP Instrction
RESET
Occurs
~
~
V
DDDR
~
~
Stop Mode
Oscillation
Stabilization
Time Normal
Operating Mode
Data Retention Mode
t
WAIT
RESET
V
DD
NOTE:
t
WAIT
is the same as 4096 x 16 x 1/f
OSC
0.2 V
DD
Figure 19-3. Stop Mode Release Timing Initiated by RESET
S3C9484/C9488/F9488 ELECTRICAL DATA
19-7
Execution of
STOP Instruction
~
~
V
DDDR
~
~
Stop Mode Idle Mode
Data Retention Mode
t
WAIT
V
DD
Interrupt
Normal
Operating Mode
Oscillation
Stabilization Time
0.2 V
DD
NOTE:
t
WAIT
is the same as 4096 x 16 x BT clock
Figure 19-4. Stop Mode(main) Release Timing Initiated by Interrupts
Execution of
STOP Instruction
~
~
V
DDDR
~
~
Stop Mode Idle Mode
Data Retention Mode
t
WAIT
V
DD
Interrupt
Normal
Operating Mode
Oscillation
Stabilization Time
0.2 V
DD
NOTE:
t
WAIT
= 128 x 16 x (1/32768) = 62.5 ms
Figure 19-5. Stop Mode(sub) Release Timing Initiated by Interrupts
ELECTRICAL DATA S3C9484/C9488/F9488
19-8
Table 19-6. A/D Converter Electrical Characteristics
(TA = - 25 °C to +85 °C, VDD = 2.2 V to 5.5 V, VSS = 0 V)
Parameter Symbol Conditions Min Typ Max Unit
Resolution – 10 – bit
Total accuracy VDD = 5.12 V – – ±3LSB
Integral Linearity Error ILE AVREF = 5.12V – – ±3
Differential Linearity Error DLE AVSS = 0 V
CPU clock = 8 MHz – – ±1
Offset Error of Top EOT –±1±3
Offset Error of Bottom EOB –±1±3
Conversion time (1) TCON 10-bit resolution
50 x fxx/4, fxx = 8MHz 20 – – µS
Analog input voltage VIAN –AVSS –AVREF V
Analog input impedance RAN – 2 1000 – MΩ
Analog reference voltage AVREF –2.5 –VDD V
Analog ground AVSS –VSS –VSS +0.3
Analog input current IADIN AVREF = VDD = 5V – – 10 µA
Analog block current (2) IADC AVREF = VDD = 5V –13mA
AVREF = VDD = 3V 0.5 1.5
AVREF = VDD = 5V
When Power Down mode 100 500 nA
NOTES:
1. 'Conversion time' is the time required from the moment a conversion operation starts until it ends.
2. IADC is an operating current during A/D conversion.
S3C9484/C9488/F9488 ELECTRICAL DATA
19-9
V
DD
103
Reference
Voltage
Input
S3C9484/C9488/
F9488
AV
SS
AV
REF
ADC0-ADC8
V
DD
C
101C
Analog
Input Pin
10pF
NOTE:
The symbol 'R' signifies an offset resistor with a value of from 50 to 100.
If this resistor is omitted, the absolute accuracy will be maximum of 3 LSBs.
Figure 19-6. Recommended A/D Converter Circuit for Highest Absolute Accuracy
ELECTRICAL DATA S3C9484/C9488/F9488
19-10
Table 19-7. Main Oscillator Frequency (fOSC1)
(TA = -25 °C to +85 °C, VDD = 2.2 V to 5.5 V)
Oscillator Clock Circuit Test Condition Min Typ Max Unit
Crystal
X
IN
C1 C2
X
OUT
(1) Crystal oscillation Frequency
(2) Crystal = 8MHz
C1 = 20 pF, C2 = 20 pF
1–8MHz
Ceramic
X
IN
C1 C2
X
OUT
Ceramic oscillation frequency 1–8
External clock
X
IN
X
OUT
XIN input frequency 1–8
RC
X
IN
X
OUT
R
r = 35 KΩ, VDD = 5 V 2
NOTES:
1. We recommend crystal of TDK Korea as the most suitable oscillator of Samsung Microcontroller. If you want to know
detailed information of Crystal Oscillator Frequency with cap, please visit the web site(www.tdkkorea.co.kr).
2. The value of Crystal(10MHz) and Cap(20pF) is based on TDK Korea parts.
Table 19-8. Main Oscillator Clock Stabilization Time (tST1)
(TA = -25 °C to +85 °C, VDD = 2.2V to 5.5 V)
Oscillator Test Condition Min Typ Max Unit
Crystal VDD = 4.5 V to 5.5 V – – 10 ms
VDD = 2.2 V to 4.5 V 30
Ceramic Stabilization occurs when VDD is equal to the minimum
oscillator voltage range. ––4
External clock XIN input high and low level width (tXH, tXL)50 – – ns
NOTE: Oscillation stabilization time (tST1) is the time required for the CPU clock to return to its normal oscillation
frequency after a power-on occurs, or when Stop mode is ended by a RESET signal.
S3C9484/C9488/F9488 ELECTRICAL DATA
19-11
X
IN
t
XH
t
XL
1/f
OSC1
V
DD
- 0.5 V
0.4 V
Figure 19-7. Clock Timing Measurement at XIN
Table 19-9. Sub Oscillator Frequency (fOSC2)
(TA = -25 °C + 85 °C, VDD = 2.2 V to 5.5 V)
Oscillator Clock Circuit Test Condition Min Typ Max Unit
Crystal
C1 C2
XT
IN
XT
OUT
C1 = 33 pF, C2 = 33 pF 32 32.768 35 kHz
Table 19-10. Sub Oscillator(crystal) Stabilization Time (tST2)
(TA = 25 °C, VDD = 2.2 V to 5.5 V))
Test Condition Min Typ Max Unit
VDD = 4.5 V to 5.5 V – 250 500 ms
VDD = 2.2 V to 4.5 V – – 10 s
NOTE: Oscillation stabilization time (tST2) is the time required for the CPU return to its normal operation when Stop mode
is released by interrupts.
Table 19-11. LCD Contrast Controller Characteristics
( TA = – 25 °C to + 85 °C, VDD = 4.5 V to 5.5 V)
Parameter Symbol Conditions Min Typ Max Unit
Resolution – – – – 4 Bits
Linearity RLIN – – – ± 1.0 LSB
Max Output Voltage
(LCDVOL=#8FH) VLPP VLC4=VDD=5V 4.9 –VLC1 V
ELECTRICAL DATA S3C9484/C9488/F9488
19-12
S3C9484/C9488/F9488 ELECTRICAL DATA
19-13
Table 19-12. LVR (Low Voltage Reset) Circuit Characteristics
(TA = 25 °C)
Parameter Symbol Test Condition Min Typ Max Unit
LVR Voltage high VLVRH 2.8
3.5
4.1
V
LVR Voltage low VLVRL 2.4
3.1
3.7
2.6
3.3
3.9
2.8
3.5
4.1
Power supply voltage rising
time TR10 µS
Power supply voltage off time TOFF 0.5 S
LVR circuit consumption IDDPR VDD = 5V +/- 10% 65 100 µA
current VDD = 3V 45 80
NOTES:
1. 216/fx ( = 8.19ms at fx = 8 MHz)
2. Current consumed when Low Voltage reset circuit is provided internally.
V
DD
t
R
t
OFF
t
DDH
t
DDL
Figure 19-8. LVR (Low Voltage Reset) Timing
ELECTRICAL DATA S3C9484/C9488/F9488
19-14
10 MHz
4MHZ
1 MHz
567
Supply Voltage (V)
Minimum instruction clock = 1/4 x oscillator frequency
5.5
8 MHZ
2.7
A
B
4321
fCPU
2.2
Figure 19-9. Operating Voltage Range
S3C9484/C9488/F9488 ELECTRICAL DATA
19-15
NOTES
S3C9484/C9488/F9488 MECHANICAL DATA
20-1
20 MECHANICAL DATA
OVERVIEW
The S3C9484/C9488/F9488 microcontroller is currently available in 32-SDIP, 32-SOP, 42-SDIP, 44-QFP package.
NOTE:
Dimensions are in millimeters.
27.88 MAX
27.48
±
0.20
(1.37)
32-SDIP-400
9.10 ± 0.20
#32
#1
0.45
±
0.10
1.00
±
0.10
3.80 ± 0.20
5.08 MAX
1.778
0.51 MIN
3.30 ± 0.30
#17
#16
0-15
0.25 + 0.10
- 0.05
10.16
Figure 20-1. 32-SDIP-400 Package Dimensions
MECHANICAL DATA S3C9484/C9488/F9488
20-2
32-SOP-450A
20.30 MAX
19.90
±
0.20
#17
#16
0-8
0.25
+ 0.10
- 0.05
11.43
8.34 ± 0.20
0.90 ± 0.20
0.05 MIN 2.00 ± 0.10
2.20 MAX
0.10 MAX
1.27
NOTE:
Dimensions are in millimeters.
12.00 ± 0.30
#32
#1
(0.43) 0.40
±
0.10
Figure 20-2. 32-SOP-450A Package Dimensions
S3C9484/C9488/F9488 MECHANICAL DATA
20-3
NOTE:
Dimensions are in millimeters.
39.50 MAX
39.10
±
0.20
0.50
±
0
.10
1.78
(1.77)
0.51 MIN
3.30 ± 0.30
3.50 ± 0.20
5.08 MAX
42-SDIP-600
0-15
1.00
±
0.10
0.25 + 0.10
- 0.05
15.24
14.00 ± 0.20
#42 #22
#21#1
Figure 20-3. 42-SDIP-600 Package Dimensions
MECHANICAL DATA S3C9484/C9488/F9488
20-4
44-QFP-1010B
#44
NOTE
: Dimensions are in millimeters.
10.00
±
0.20
13.20
±
0.30
10.00 ± 0.20
13.20 ± 0.30
#1 0.35
+ 0.10
- 0.05
0.80
0.10 MAX
0.80 ± 0.20
0.05 MIN
2.05
±
0.10
2.30 MAX
0.15
+ 0.10
- 0.05
0-8
0.15 MAX (1.00)
Figure 20-4. 44-QFP-1010 Package Dimensions
S3C9484/C9488/F9488 MTP
21-1
21 MTP
OVERVIEW
The S3F9488 single-chip CMOS microcontroller is the MTP (Multi Time Programmable) version of the
S3C9484/C9488 microcontroller. It has an on-chip Half Flash ROM instead of masked ROM. The Half Flash ROM is
accessed by serial data format. The Half Flash ROM can be rewritten up to 100 times.
The S3F9488 is fully compatible with the S3C9484/C9488, in function, in D.C. electrical characteristics, and in pin
configuration. Because of its simple programming requirements, the S3F9488 is ideal for use as an evaluation chip
for the S3C9484/C9488.
MTP S3C9484/C9488/F9488
21-2
P2.3/SEG6
P2.2/SEG5
P2.1/SEG4
P2.0/SEG3
P4.2/SEG2
P4.1/SEG1
P4.0/SEG0
P1.7/COM0
P1.6/COM1
P1.5/COM2
P1.4/COM3
SEG7/P2.4
SEG8/P2.5
SEG9/P2.6
SEG10/P2.7
SEG11/P4.3
SEG12/P4.4
SEG13/P4.5
SEG14/P4.6
SEG15/P3.0
SEG16/RXD/P3.1
SEG17/TXD/P3.2
S3F9488
(Top View)
(44-QFP)
34
35
36
37
38
39
40
41
42
43
44
33
32
31
30
29
28
27
26
25
24
23
P1.3/ADC0/
P1.2/ADC1
P1.1/ADC2/BUZ
P1.0/ADC3/TBPWM
P0.7/COM4/ADC4
P0.6/COM5/ADC5
P0.5/COM6/ADC6
AVREF
P0.4/COM7/ADC7
P0.3/ADC8
P0.2/RESETB
22
21
20
19
18
17
16
15
14
13
12
SEG18/INT0/P3.3
TAOUT/INT1/P3.4
SDAT/TACK/INT2/P3.5
SCLK/TACAP/INT3/P3.6
VDD
XOUT
TEST/VPP
XTIN/P0.0
XTOUT/P0.1
1
2
3
4
5
6
7
8
9
10
11
VSS
XIN
Figure 21-1. Pin Assignment Diagram (44-Pin Package)
S3C9484/C9488/F9488 MTP
21-3
SEG12/P4.4
SEG13/P4.5
SEG14/P4.6
SEG15/P3.0
SEG16/RXD/P3.1
SEG17/TXD/P3.2
SEG18/INT0/P3.3
TAOUT/INT1/P3.4
SDAT/TACK/INT2/P3.5
SCLK/TACAP/INT3/P3.6
VDD
VSS
XOUT
XIN
VPP/TEST
XTIN/P0.0
XTOUT/P0.1
RESETB/P0.2
AVREF
COM6/ADC6/P0.5
COM5/ADC5/P0.6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
P4.3/SEG11
P2.7/SEG10
P2.6/SEG9
P2.5/SEG8
P2.4/SEG7
P2.3/SEG6
P2.2/SEG5
P2.1/SEG4
P2.0/SEG3
P4.2/SEG2
P4.1/SEG1
P4.0/SEG0
P1.7/COM0
P1.6/COM1
P1.5/COM2
P1.4/COM3
P1.3/ADC0
P1.2/ADC1
P1.1/ADC2/BUZ
P1.0/ADC3/TBPWM
P0.7/ADC4/COM4
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
S3F9488
(Top View)
42-SDIP
Figure 21-2. Pin Assignment Diagram (42-Pin Package)
VSS
XI N
XOUT
VPP/TEST
XTIN/P0.0
XTOUT/P0.1
RESETB/P0.2
AVREF
ADC3/TBPWM/P1.0
BUZ/ADC2/P1.1
ADC1/P1.2
ADC0/P1.3
COM3/P1.4
COM2/P1.5
COM1/P1.6
COM0/P1.7
S3F9488
(Top View)
32-SOP
32-SDIP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VDD
P3.6/INT3/TACAP/SCLK
P3.5/INT2/TACK/SDAT
P3.4/INT1/TAOUT
P3.3/INT0/SEG18
P3.2/TXD/SEG17
P3.1/RXD/SEG16
P3.0/SEG15
P2.7/SEG10
P2.6/SEG9
P2.5/SEG8
P2.4/SEG7
P2.3/SEG6
P2.2/SEG5
P2.1/SEG4
P2.0/SEG3
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
Figure 21-3. Pin Assignment Diagram (32-Pin Package)
MTP S3C9484/C9488/F9488
21-4
Table 21-1. Descriptions of Pins Used to Read/Write the Flash ROM
Main Chip During Programming
Pin Name Pin Name Pin No. I/O Function
P3.5 SDAT 3 (44-pin)
9 (42-pin)
30 (32-pin)
I/O Serial data pin (output when reading, Input
when writing) Input and push-pull output port
can be assigned
P3.6 SCLK 4 (44-pin)
10 (42-pin)
31 (32-pin)
ISerial clock pin (input only pin)
TEST VPP 9 (44-pin)
15 (42-pin)
4 (32-pin)
IPower supply pin for flash ROM cell writing
(indicates that MTP enters into the writing
mode). When 12.5 V is applied, MTP is in
writing mode and when 5 V is applied,
MTP is in reading mode. (Option)
P0.2 RESETB 12 (44-pin)
18 (42-pin)
7 (32-pin)
I
VDD/VSS VDD/VSS 5/6 (44-pin)
11/12 (42-pin)
32/1 (32-pin)
ILogic power supply pin.
Table 21-2. Comparison of S3F9488 and S3C9484/C9488 Features
Characteristic S3F9488 S3C9484/C9488
Program Memory 8 Kbyte Flash ROM 4K/8K byte mask ROM
Operating Voltage (VDD)2.2(2.7) V to 5.5 V 2.2(2.7) V to 5.5 V
MTP Programming Mode VDD = 5 V, VPP = 12.5 V
Pin Configuration 44QFP / 42SDIP / 32SDIP/ 32SOP
EPROM Programmability User Program multi time Programmed at the factory
S3C9484/C9488/F9488 DEVELOPMENT TOOLS
22-1
22 DEVELOPMENT TOOLS
OVERVIEW
Samsung provides a powerful and easy-to-use development support system on a turnkey basis. The development
support system is composed of a host system, debugging tools, and supporting software. For a host system, any
standard computer that employs Win95/98/2000/XP as its operating system can be used. A sophisticated
debugging tool is provided both in hardware and software: the powerful in-circuit emulator, SMDS2+ or SK-1000, for
the S3C7-, S3C9-, and S3C8- microcontroller families. SMDS2+ is a newly improved version of SMDS2, and SK-
1000 is supported by a third party tool vendor. Samsung also offers supporting software that includes, debugger, an
assembler, and a program for setting options.
SHINE
Samsung Host Interface for In-Circuit Emulator, SHINE, is a multi-window based debugger for SMDS2+. SHINE
provides pull-down and pop-up menus, mouse support, function/hot keys, and context-sensitive hyper-linked help. It
has an advanced, multiple-windowed user interface that emphasizes ease of use. Each window can be easily sized,
moved, scrolled, highlighted, added, or removed.
SASM
The SASM takes a source file containing assembly language statements and translates them into a corresponding
source code, an object code and comments. The SASM supports macros and conditional assembly. It runs on the
MS-DOS operating system. As it produces the re-locatable object codes only, the user should link object files.
Object files can be linked with other object files and loaded into memory. SASM requires a source file and an
auxiliary register file (device_name.reg) with device specific information.
SAMA ASSEMBLER
The Samsung Arrangeable Microcontroller (SAM) Assembler, SAMA, is a universal assembler, and generating an
object code in the standard hexadecimal format. Assembled program codes include the object code used for ROM
data and required In-circuit emulators program control data. To assemble programs, SAMA requires a source file and
an auxiliary definition (device_name.def) file with device specific information.
HEX2ROM
HEX2ROM file generates a ROM code from a HEX file which is produced by the assembler. A ROM code is needed
to fabricate a microcontroller which has a mask ROM. When generating a ROM code (.OBJ file) by HEX2ROM, the
value "FF" is automatically filled into the unused ROM area, up to the maximum ROM size of the target device.
DEVELOPMENT TOOLS S3C9484/C9488/F9488
22-2
TARGET BOARDS
Target boards are available for all the S3C9-series microcontrollers. All the required target system cables and
adapters are included with the device-specific target board. TB9484/88 is a specific target board for the
S3C9484/C9488/F9488 development
Bus
Emulator (SMDS2+ or SK-1000)
RS-232C
POD
Probe
Adapter
EPROM Writer Unit
RAM Break/Display Unit
Trace/Timer Unit
SAM9 Base Unit
Power Supply Unit
IBM-PC AT or Compatible
TB9484/88
Target
Board
EVA
Chip
Target
Application
System
Figure 22-1. SMDS+ or SK-1000 Product Configuration
S3C9484/C9488/F9488 DEVELOPMENT TOOLS
22-3
TB9484/9488 TARGET BOARD
The TB9484/9488 target board is used for the S3C9484/C9488/F9488 microcontrollers. It is supported by the
SK-1000/SMDS2+ development systems.
TB9484/88
SMxxxx
GND VCC
To User_V
CC
OFF ON
SMDS2 SMDS2+
J101
1
49
2
50
25
RESET
IDLE STOP
X-tal
(32KHz)
1
CN1
P0.0 P0.0
USE PORT
+
+
50-Pin Connector
144-QFP
S3E9480
EVA Chip
100-Pin Connector
U2
74HC11
4DIP SW
REV.X
200x. xx. xx
(REV0)REV1
(3EH.7)3FH.2
(3EH.0)3FH.1
(3EH.1)3FH.0
(3EH.2)3FH.7
Figure 22-2. TB9484/88 Target Board Configuration
DEVELOPMENT TOOLS S3C9484/C9488/F9488
22-4
Table 22-1. Power Selection Settings for TB9484/88
"To User_Vcc" Settings Operating Mode Comments
To user_Vcc
off on
Target
System
SK-1000/SMDS2+
TB9484/88 V
CC
V
SS
V
CC
External
The SK-1000/SMDS2+ main
board supplies VCC to the
target board (evaluation chip)
and the target system.
on
To user_Vcc
off
Target
System
SK-1000/SMDS2+
TB9484/88 V
CC
V
SS
V
CC
External
The SK-1000/SMDS2+ main
board supplies VCC only to the
target board (evaluation chip).
The target system must have
its own power supply.
NOTE:The following symbol in the "To User_Vcc" Setting column indicates the electrical short (off) configuration:
SMDS2+ Selection (SAM8)
In order to write data into program memory that is available in SMDS2+, the target board should be selected to be for
SMDS2+ through a switch as follows. Otherwise, the program memory writing function is not available.
Table 22-2. The SMDS2+ Tool Selection Setting
"SW1" Setting Operating Mode
SMDS SMDS2+
Target
System
SMDS2+
R/W*R/W*
S3C9484/C9488/F9488 DEVELOPMENT TOOLS
22-5
ON
OFF
3FH.2 3FH.1 3FH.0 3EH.7
ON Low
OFF High
NOTES:
1. There is no ROM in the EVAchip. So smart option is not
determined by software but DIP switch.
2. Target board revision number is printed on the target
board (Refer to the Figure 22-2.)
: Target board revision 1
3FH.7 3FH.0 3FH.1 3FH.2 : Target board revision 0
Figure 22-4. DIP Switch for Smart Option
SWITCH ON OFF
3FH.2 XTin / XTout enable Normal I/O pin enable
3FH.1 Internal RC oscillator Basic Timer overflow used
3FH.0 Normal I/O pin enable RESET Pin enable
3EH.7 LVR disable LVR enable
DEVELOPMENT TOOLS S3C9484/C9488/F9488
22-6
SEG18/INT0/P3.3
TACK/INT2/P3.5
VDD
N.C.
TEST
XTOUT/P0.1
ADC8/P0.3
AVREF
COM5/ADC5/P0.6
TBPWM/ADC3/P1.0
ADC1/P1.2
COM3/P1.4
COM1/P1.6
SEG0/P4.0
SEG2/P4.2
SEG4/P2.1
SEG6/P2.3
SEG8/P2.5
SEG10/P2.7
SEG12/P4.4
SEG14/P4.6
SEG16/RXD/P3.1
N.C.
N.C.
N.C.
S3C9228
(42-SDIP)
P3.4/INT1/TAOUT
P3.6/INT3/TACAP
VSS
N.C.
P0.0/XTIN
P0.2/RESETB
P0.4/ADC7/COM7
P0.5/ADC6/COM6
P0.7/ADC4/COM4
P1.1/ADC2/BUZ
P1.3/ADC0
P1.5/COM2
P1.7/COM0
P4.1/SEG1
P2.0/SEG3
P2.2/SEG5
P2.4/SEG7
P2.6/SEG9
P4.3/SEG11
P4.5/SEG13
P3.0/SEG15
P3.2/TXD/SEG17
N.C.
N.C.
N.C.
50-PIN DIP
SOCKET
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
J101
Figure 22-4. 44-Pin Connector for TB9484/88
Target Board Target System
Target Cable for Connector
Part Name: AS20D
Order Code: SM6304
J101
1 2
49 50
1 2
49 50
50-Pin Connector
50-Pin Connector
Figure 22-5. S3C9484/C9488/F9488 Probe Adapter for 44-pin Connector Package
