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DESCRIPTION

The 87C528 single-chip 8-bit microcontroller is manufactured in an advanced CMOS process and is a derivative of the 80C51 microcontroller family. The 87C528 has the same instruction set as the 80C51. Three versions of the derivative exist:

? 83C528—32k bytes ROM

? 83C524—16k bytes ROM

? 80C528—ROMless version of the 83C528

? 87C528—32k bytes EPROM

? 83C524—16k bytes EPROM

This device provides architectural enhancements that make it applicable in a variety of applications in consumer, telecom and general control systems, especially in those systems which need large ROM and RAM capacity on-chip.

FEATURES

? 80C51 instruction set

– 512 × 8 RAM

– Memory addressing capability 64k ROM and 64k RAM

– Three 16-bit counter/timers

– On-chip watchdog timer with oscillator

– Full duplex UART

– I2C serial interface

? Power control modes:

– Idle mode

– Power-down mode

– Warm start from power-down

? CMOS and TTL compatible

? Extended temperature ranges

? EPROM code protection

? OTP package available

? 16 MHz speed at VCC = 5 V