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Features:
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 transceiver, 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/I2 C, 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 )