Catalogue - Low-Voltage/Low-Power MCUs - Silicon Laboratories

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C8051F920

Single/Dual Battery, 0.9-3.6 V, 32 kB, smaRTClock, 10-Bit ADC MCU

Supply Voltage: 0.9 to 3.6 V

- One-cell mode supports 0.9-1.8 V operation

- 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

- Typical sleep mode current < 0.1 uA; retains state and RAM-contents over full supply range; fast wakeup

- 2 built-in brown-out detectors cover sleep and active modes

10-Bit Analog to Digital Converter

- Up to 300 ksps

- Up to 23 external inputs

- External pin or internal VREF (no external capacitor required)

- Built-in temperature sensor

- External conversion start input option

- Autonomous Burst Mode with 16-bit automatic averaging accumulator

Two Comparators

- Programmable hysteresis and response time

- Configurable as interrupt or reset source

- Low current (< 0.5 uA)

- Up to 23 Capacitive Touch Sense inputs

Memory

- 4352 bytes internal data RAM (256 + 4K)

- 32 kB bytes Flash; In-system programmable in 1024-byte sectors; Full read/write/erase functionality over the entire supply range

- External memory interface (multiplexed address/data) On-Chip Debug

- On-chip debug circuitry facilitates full speed, non-intrusive insystem debug (no emulator required)

High-Speed 8051 uC 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

Digital Peripherals

- 24 port I/O; All 5 V tolerant with programmable drive strength

- Hardware enhanced UART, SPI and SMBus™ serial ports available concurrently

- Low power 32-bit smaRTClock (0.5 uA) operates down to 0.9V

- Four general purpose 16-bit counter/timers

- 16-bit programmable counter array (PCA) with six capture/compare modules and watchdog timer:

• 8, 9, 10, 11, or 16-bit PWM

• Rising/falling edge capture

• Frequency output

• Software timer

Clock Sources

- Precision internal oscillators: 24.5 MHz with ±2% accuracy supports 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 self-oscillate

- Can switch between clock sources on-the-fly; useful in power saving modes

Ultra-Small Package Options

- 32-pin QFN (5x5 mm)

- 32-pin LQFP (7x7 mm)

Temperature Range: -40 to +85 °C


		^:
Power On
Reset/PMU
	1 Wake
	Reset ^ 1

Port I/O Configuration

CIP-51 8051 Controller Core

P0.0/VREF

P0.1/AGND

P0.2/XTAL1

P0.3/XTAL2

P0.4/TX

P0.5/RX

P0.6/CNVSTR

P0.7/IREF0

P1.0/AD0

P1.1/AD1

P1.2/AD2

P1.3/AD3

P1.4/AD4

P1.5/AD5

P1.6/AD6

P1.7/AD7

P2.0/A8

P2.1/A9

P2.2/A10

P2.3/A11

P2.4/ALE

P2.5/RD

P2.6/WR

P2.7/C2D

Digital Peripherals

32k Byte ISP Flash Program Memory

UART

Port 0 Drivers

Timers 0,

1, 2, 3

256 Byte SRAM

Debug/ Programming Hardware

Priority Crossbar Decoder

4096 Byte XRAM

PCA/

WDT

-C2D Power Net

CRC Engine

I SMBus \t-f-

I SPI 0,1 \f-t-

VDD/DC+ GND/DC-

VREG

Port 1

Drivers

J Digital Power

Analog Power

SYSCLK

Crossbar Control

SFR

Bus

Precision 24.5 MHz Oscillator

Analog Peripherals

DC/DC Converter

Low Power 20 MHz Oscillator

6-bit IREF

REF0

Port 2

Drivers

Internal External VREF V VREF

External Oscillator Circuit

XTAL1 XTAL2

VDD VREF

10-bit

300ksps

ADC

Temp Sensor

XTAL3 I

XTAL4

smaRTClock Oscillator

GND

CP0, CP0A

System Clock Configuration

CP1, CP1A

Comparators

Low-Voltage/Low-Power

1.14.2008

Low-Voltage/Low-Power MCUs - Silicon Laboratories - #1

Codec, Amplifier, Infrared sensor, Oscillator, Microcontroller