GENERAL DESCRIPTION

The ICSI IC80C51 and IC80C31 are high-performance microcontroller fabricated using high-density CMOS technology. The CMOS IC80C51/31 is functionally compatible with the industry standard 80C51/31 microcontrollers.

FEATURES

• 80C51 based architecture

• 4K x 8 ROM (IC80C51 only)

• 128 x 8 RAM

• Two 16-bit Timer/Counters

• Full duplex serial channel

• Boolean processor

• Four 8-bit I/O ports, 32 I/O lines

• Memory addressing capability

– 64K ROM and 64K RAM

• Program memory lock

– Encrypted verify (32 bytes)

– Lock bits (2)

• Power save modes:

– Idle and power-down

• Six interrupt sources

• Most instructions execute in 0.3 µs

• CMOS and TTL compatible

• Maximum speed: 40 MHz @ Vcc = 5V

• Packages available:

– 40-pin DIP

– 44-pin PLCC

– 44-pin PQFP