P1.0/AD0 P1.1/AD1 P1.2/AD2 P1.3/AD3 P1.4/AD4 P1.5/AD5 Port DriversP2.0/A8 P2.1/A9 P2.2/A10 P2.3/A11 P2.4/ALE SPI 0,1 Analog Peripherals Comparators PowerNet VDD/DC+ GND/DC- XTAL1 SYSCLK System Clock Configuration External Oscillator Circuit Precision 24.5 MHz Oscillator Debug ProgrammingHardware Power Reset/PMUReset C2D C2CK/RST Wake 10-bit 300ksps ADC TempSensor External VREF Internal VREF VDD XTAL2 Low Power 20 MHz Oscillator 6-bit IREF VREF GND P1.6/AD6 P1.7/AD7 IREF0 CP0, CP0A P2.5/RD P2.6/WR P2.7/C2D CP1,CP1A smaRTClock Oscillator XTAL3 XTAL4 DC/DC Converter VBAT GND VREG Digital Power Analog Power CRC Engine C8051F920 Single/Dual Battery, 0.9-3.6 32kB, smaRTClock, 10-Bit ADC MCU Supply Voltage: 0.9 One-cellmode supports 0.9–1.8 Two-cellmode supports 1.8–3.6 Built-indc-dc converter 1.8–3.3 output(65 mW max) one-cellmode; can supply external devices Typicalsleep mode current retainsstate RAM-contents over full supply range; fast wakeup built-inbrown-out detectors cover sleep activemodes 10-Bit Analog DigitalConverter 300ksps 23external inputs Externalpin internalVREF externalcapacitor required) Built-intemperature sensor Externalconversion start input option AutonomousBurst Mode 16-bitautomatic averaging accumulatorTwo Comparators Programmablehysteresis responsetime resetsource Lowcurrent 23Capacitive Touch Sense inputs Memory 4352bytes internal data RAM (256 32kB bytes Flash; In-system programmable sectors;Full read/write/erase functionality over entiresupply range Externalmemory interface (multiplexed address/data) On-Chip Debug On-chipdebug circuitry facilitates full speed, non-intrusive systemdebug emulatorrequired) High-Speed 8051 Pipe-linedinstruction architecture; executes 70% systemclocks 25MIPS peak throughput 25MHz clock Expandedinterrupt handler Digital Peripherals 24port programmabledrive strength Hardwareenhanced UART, SPI SMBusserial ports available concurrently Lowpower 32-bit smaRTClock (0.5 uA) operates down Fourgeneral purpose 16-bit counter/timers 16-bitprogrammable counter array (PCA) sixcapture/com- pare modules watchdogtimer: 10,11, 16-bitPWM Rising/fallingedge capture Frequencyoutput Softwaretimer Clock Sources Precisioninternal oscillators: 24.5 MHz 2%accuracy sup- ports UART operation; spread-spectrum mode reducedEMI Lowpower internal oscillator: 20 MHz Externaloscillator: Crystal, RC, CMOSclock smaRTClockoscillator: 32.768 kHz crystal Canswitch between clock sources on-the-fly; useful powersaving modes Ultra-Small Package Options 32-pinQFN (5x5 mm) 32-pinLQFP (9x9 mm) Temperature Range: –40 Low-Voltage/Low-PowerCopyright SiliconLaboratories 11.11.2008 Silicon Laboratories SiliconLabs SiliconLaboratories Inc. Other products brandnamesmentioned herein registeredtrademarks respectiveholders C8051F920 Single/Dual Battery, 0.9-3.6 32kB, smaRTClock, 10-Bit ADC MCU Selected Electrical Specifications ParameterConditions Min Typ Max Units Supply Input Voltage two-cell mode one-cell mode DC-DC converter disabled 1.8 DC-DCconverter enabled 0.9 DC-DCBoost Converter Output Power off-chipcurrent 65mW Supply Current CPUActive VDD 24.5MHz (2% internal precision oscillator) mASupply Current (shutdown) Sleepmode; smaRTClock off nASleep mode; smaRTClock running ClockFrequency Range DC 25MHz Wakeup Time two-cell mode one-cellmode InternalOscillator Frequency Precision oscillator 24 24.5 25 MHz Low power oscillator 18 20 22 MHz ConverterResolution 10 bits Throughput Rate 300ksps Package Information: 32-Pin QFN BottomView 1718 20 23 24 22 21 19 SideView MMMIN TYP MAX 0.800.9 1.00 A1 0.00 0.02 0.05 A2 0.651.00 A3 0.180.25 0.30 D21.25 2.70 3.25 E21.25 2.70 3.25 0.300.40 0.50 PackageInformation: 32-Pin LQFP MM MIN TYP MAX MIN TYP MAX 9.00BSC A1 0.05 0.15E1 7.00 BSC A2 1.35 1.40 1.45 0.450.60 0.75 0.300.37 0.45 aaa 0.20 0.20bbb 0.20 9.00BSC ccc 0.10 D1 7.00 BSC ddd 0.20 0.80BSC C8051F9xxProduct Family Device Part PackageFlash Size RAM Size C8051F930-GQ 32-pin LQFP 64 kB kBC8051F930-GM 32-pin QFN 64 kB kBC8051F931-GM 24-pin QFN 64 kB kBC8051F920-GQ 32-pin LQFP 32 kB kBC8051F920-GM 32-pin QFN 32 kB kBC8051F921-GM 24-pin QFN 32 kB