System Overview
C8051F320/1 devices are fully integrated mixed-signal System-on-a-Chip MCUs. Highlighted features are listed below. Refer to Table 1.1 for specific product feature selection.

• High-speed pipelined 8051-compatible microcontroller core (up to 25 MIPS)
• In-system, full-speed, non-intrusive debug interface (on-chip)
• Universal Serial Bus (USB) Function Controller with eight flexible endpoint pipes, integrated trans ceiver, and 1k FIFO RAM
• Supply Voltage Regulator (5-to-3 V)
• True 10-bit 200 ksps 17-channel single-ended/differential ADC with analog multiplexer
• On-chip Voltage Reference and Temperature Sensor
• On-chip Voltage Comparators (2)
• Precision programmable 12 MHz internal oscillator and 4x clock multiplier
• 16 kB of on-chip Flash memory
• 2304 total bytes of on-chip RAM (256 + 1k + 1k USB FIFO)
• SMBus/I2C, Enhanced UART, and Enhanced SPI serial interfaces implemented in hardware
• Four general-purpose 16-bit timers
• Programmable Counter/Timer Array (PCA) with five capture/compare modules and Watchdog Timer function
• On-chip Power-On Reset, VDD Monitor, and Missing Clock Detector
• 25/21 Port I/O (5 V tolerant)