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Analog Peripherals

- 10-Bit ADC

? Up to 200 ksps

? Up to 17 or 13 external single-ended or differential

inputs

? VREF from external pin, internal reference, or VDD

? Built-in temperature sensor

? External conversion start input

- Two Comparators

- Internal Voltage Reference

- POR/Brown-Out Detector

USB Function Controller

- USB specification 2.0 compliant

- Full speed (12 Mbps) or low speed (1.5 Mbps)

operation

- Integrated clock recovery; no external crystal

required for full speed or low speed

- Supports eight flexible endpoints

- 1 kB USB buffer memory

- Integrated transceiver; no external resistors required

On-Chip Debug

- On-chip debug circuitry facilitates full speed,

non-intrusive in-system debug (no emulator required)

- Provides breakpoints, single stepping,

inspect/modify memory and registers

- Superior performance to emulation systems using

ICE-chips, target pods, and sockets

Voltage Regulator Input: 4.0 to 5.25 V

High Speed 8051 μC Core

- Pipelined instruction architecture; executes 70 of

instructions in 1 or 2 system clocks

- Up to 25 MIPS throughput with 25 MHz clock

- Expanded interrupt handler

Memory

- 2304 bytes internal RAM (1k + 256 + 1k USB FIFO)

- 16 kB Flash; In-system programmable in 512-byte

sectors

Digital Peripherals

- 25/21 Port I/O; All 5 V tolerant with high sink current

- Hardware enhanced SPI?, enhanced UART, and

SMBus? serial ports

- Four general purpose 16-bit counter/timers

- 16-bit programmable counter array (PCA) with five

capture/compare modules

- Real time clock mode using external clock source

and PCA or timer

Clock Sources

- Internal Oscillator: 0.25 accuracy with clock

recovery enabled. Supports all USB and UART

modes

- External oscillator: Crystal, RC, C, or Clock

(1 or 2 pin modes)

- Can switch between clock sources on-the-fly;

useful in power saving strategies

RoHS Compliant Packages

- 32-pin LQFP (C8051F320)

- 28-pin QFN (C8051F321)

Temperature Range: –40 to +85 °C