System Overview
C8051F336/7/8/9 devices are fully integrated mixed-signal System-on-a-Chip MCUs. Highlighted features are listed below. Refer to Table 2.1 for specific product feature selection and part ordering numbers.

• High-speed pipelined 8051-compatible microcontroller core (up to 25 MIPS)
• In-system, full-speed, non-intrusive debug interface (on-chip)
• True 10-bit 200 ksps 20-channel single-ended/differential ADC with analog multiplexer
• 10-bit Current Output DAC
• Precision programmable 24.5 MHz internal oscillator
• Low-power, low-frequency oscillator
• 16 kB of on-chip Flash memory—512 bytes are reserved
• 768 bytes of on-chip RAM
• SMBus/I2C, Enhanced UART, and Enhanced SPI serial interfaces implemented in hardware
• Four general-purpose 16-bit timers
• Programmable Counter/Timer Array (PCA) with three capture/compare modules and Watchdog Timer function
• On-chip Power-On Reset, VDD Monitor, and Temperature Sensor
• On-chip Voltage Comparator
• 21 or 17 Port I/O (5 V tolerant)
• Low-power suspend mode with fast wake-up time