• 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

• 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 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

• 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

• 2304 bytes internal RAM (1k + 256 + 1k USB FIFO)
• 16 kB Flash; In-system programmable in 512-byte sectors

• 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

• 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

• 32-pin LQFP (C8051F320)
• 28-pin QFN (C8051F321)

Data Sheet