USB Function Controller

- USB specification 2.0 compliant

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

- Integrated clock recovery; no external oscillator required for full speed or low speed

- Supports six flexible endpoints

- 256-byte USB buffer memory

- Integrated transceiver; no external resistors required

On-Chip Debug

- C8051F34A can be used as code development platform; Complete development kit available

- On-chip debug circuitry facilitates full speed, nonintrusive in-system debug

- Provides breakpoints, single stepping, inspect/modify memory and registers

Memory

- 1280 bytes internal data RAM (256 + 1024)

- 16 kB byte-programmable EPROM code memory

- EPROM can be programmed from firmware running on the device

Supply Voltage: 1.8 to 5.25 V

- On-chip LDO for internal core supply

- Built-in supply voltage monitor

Temperature Range: –40 to +85 °C

High-Speed 8051 µC Core

- Pipelined instruction architecture; executes 70 of instructions in 1 or 2 system clocks

- Up to 48 MIPS throughput with 48 MHz clock

- Expanded interrupt handler

Digital Peripherals

- Up to 16 port I/O with high sink current capability

- Hardware enhanced SPI™, SMBus™, and two enhanced UART serial ports

- Four general purpose 16-bit counter/timers

- 16-bit programmable counter array (PCA) with five capture/compare modules and enhanced PWM functionality

Clock Sources

- Two internal oscillators:

• 48 MHz: ±0.25 accuracy with clock recovery enabled. Supports all USB and UART modes

• 80/40/20/10 kHz low frequency, low power

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

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

Package Options

- 4x4 mm QFN24

- 5x5 mm QFN28