Low-Voltage/Low-Power Copyright © 2009 by Silicon Laboratories 10.1.2009
Port 0
Drivers
Digital Peripherals
UART
Timers 0,
1, 2, 3
PCA/
WDT
SMBus
Priority
Crossbar
Decoder
P0.0/VREF
P0.1/AGND
P0.2/XTAL1/RTCOUT
P0.3/XTAL2/WAKEOUT
P0.4/TX
P0.5/RX
P0.6/CNVSTR
P0.7/IREF0
Crossbar Control
Port I/O Configuration
CIP-51 8051
Controller Co re
16k Byte ISP Flash
Program Memory
256 Byte SRAM
SFR
Bus
512 Byte XRAM
Port 1
Drivers
P1.0/SCK1
P1.1/MISO1
P1.2/MOSI1
P1.3/NSS1
P1.4
P1.5
Port 2
Drivers
SPI 0,1
Analog Perip herals
Comparators
+
-
Power Net
VDD/DC+
GND/DC-
XTAL1
SYSCLK
System Clo ck
Configuration
External
Oscillator
Circuit
Precision
24.5 MHz
Oscillator
Debug /
Programming
Hardware
Power On
Reset/PMU
Reset
C2D
C2CK/RST
Wake
12-bit
ADC
A
M
U
X
Temp
Sensor
External
VREF
Internal
VREF VDD
XTAL2
Low Power
20 MHz
Oscillator
6-bit
IREF
VREF
GND
P1.6
IREF0
CP0, CP0A
P2.7/C2D
+
-
CP1, CP1A
smaRTClock
Oscillator
XTAL3
XTAL4
DC/DC
Converter
VBAT
GND
VREG Digital
Power
Analog
Power
CRC
Engine
DCEN
C8051F912
Ultra-Low Power, High-Performance MCU
Ultra-Low Power
-160 µA/MHz active current from 1.8–3.6 V @ 25 MHz
-10 nA sleep current with data retention; BOD disabled
-50 nA sleep current with data retention; BOD enabled
-
300 nA sleep cu rren t with s m a RTClock (internal oscillator)
-600 nA sleep current with smaRTClock (external crystal)
-2 µs wake up from sleep
-1.5 µs analog settling time
Supply Voltage: 0.9 to 3.6 V
-One-cell mode supports 0.9–3.6 V operation; bypass feature
automatically shuts off the dc-dc converter when not needed
-Two-cell mode supports 1.8–3.6 V operation
-Built-in dc-dc converter with 1.8 –3.3 V output (65 mW max) for
use in one-cell mode; can supply external devices
12-Bit Analog to Digital Converter
-Up to 75 ksps 12-bit mode or 300 ksps 10-bit mode
-Up to 15 external inputs
-External pin or internal VREF (no external capacitor required)
-On-chip PGA allows measuring voltages up to twice the
reference voltage
-Autonomous Burst Mode with 16-bit automatic averaging
accumulator
-Built-in temperature sensor
Two Comparators
-Programmable hysteresis and response time
-Configurable as interrupt or reset source
-Low current (400 nA typical)
-Up to 15 Capacitive Touch Sense inputs
Internal 6-Bit Current Reference
-Up to ±500 µA; source and sink capability
-Enhanced resolution via PWM interpolation
Development Kit: C8051F912DK
High-Speed 8051 µC Core
-Pipe-lined instruction architecture; executes 70% of instructions
in 1 or 2 system clocks
-25 MIPS peak throughput with 25 MHz clock
-Expanded interrupt handler
Memory
-768 bytes internal data RAM (256 + 512)
-16 kB Flash; In-system programmable; Full read/write/erase
functionality over the entire supply range
Digital Peripherals
-16 port I/O; All 5 V tolerant with programmable drive strength
-Hardware enhanced UART, 2 SPI and SMBus™ serial ports
available concurrently
-Low power 32-bit smaRTClock operates down to 0.9 V
-Four general purpose 16-bit counter/timers
-16-bit programmable counter array (PCA) with six capture/com-
pare modules and watchdog timer
Clock Sources
-Precision internal oscillators: 24.5 MHz with ±2% accuracy sup-
ports UART operation; spread-spectrum mode for reduced EMI
-Low power internal oscillator: 20 MHz
-External oscillator: Crystal, RC, C, CMOS clock
-smaRTClock oscillator: 32.768 kHz crystal or 16.4 kHz LFO
-Can switch between clock sources on-the-fly; useful in power
saving modes
On-Chip Debug
-On-chip debug circuitry facilitates full speed, non-intrusive in-
system debug (no emulator required)
-Provides 4 breakpoints, single stepping
Package Options
-24-pin QFN (4x4 mm), RoHS compliant
-24-pin QSOP (easy to hand solder), RoHS compliant
Temperature Range: –40 to +85 °C
Low-Voltage/Low-Power Copyright © 2009 by Silicon Laboratories 10.1.2009
Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.
Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders
C8051F912
Ultra-Low Power, High-Performance MCU
Selected Electrical Specifications
(At 25 C°) Parameter Conditions Min Typ Max Units
Supply Input Voltage
two-cell mode
one-cell mode DC-DC converter disabled 1.8 — 3.6 V
DC-DC converter enabled 0.9 — 3.6 V
Supply Current with CPU Active VDD = 1.8–3.6 V
Clock = 24.5 MHz
(±2% internal precision oscillator) —160—µA/MHz
Supply Current (shutdown)
(VBAT = 1.8 V)
Sleep mode; BOD off — .010 — µA
Sleep mode; BOD on — .050 — µA
Sleep mode; smaRTClock running — .300 — µA
Clock Frequency Range DC — 25 MHz
Wakeup Time two-cell mode — 2 — µs
one-cell mode — 10 — µs
Analog Settling Time — 1.5 — µs
Internal Oscillator
Frequency Precision oscillator 24 24.5 25 MHz
Low power oscillator 182022MHz
A/D Converter
Resolution 12/10 bits
Throughput Rate — — 75/300 ksps
Product Family
Package Information: 24-Pin QFN
MM
Min Typ Max
A
A1
b
D
D2
e
E
E2
L
L1
aaa
bbb
ccc
ddd
0.70 0.75 0.80
0.00 0.02 0.05
0.18 0.25 0.30
4.00 BSC
2.50 2.60 2.70
0.50 BSC
4.00 BSC
2.50 2.60 2.70
0.35 0.40 0.45
— — 0.15
— — 0.10
— — 0.10
— — 0.05
— — 0.10
Part
Number Package Package
Size ( mm) A DC
Flash
(kB) RAM
(bytes)
RT C sl eep
(nA) BOD
Disableable
C8051F912-GM 24p QFN 4x 4 12-bit 16 768 300 Yes
C8051F912-GU 24p QS OP 9x 6 12-bit 16 768 300 Y es
C8051F911-GM 24p QFN 4x 4 10-bit 16 768 600 No
C8051F911-GU 24p QS OP 9x 6 10-bit 16 768 600 No
C8051F902-GM 24p QFN 4x 4 12-bit 8 768 300 Yes
C8051F902-GU 24p QS OP 9x 6 12-bit 8 768 300 Yes
C8051F901-GM 24p QFN 4x 4 10-bit 8 768 600 No
C8051F901-GU 24p QS OP 9x 6 10-bit 8 768 600 No
