87C528 datasheet(2/26 Pages) PHILIPS

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Philips Semiconductors

Product specification

87C524/87C528

80C51 8-bit microcontrollers

16K/32K, 512 OTP, I2C, watchdog timer

1999 Jul 23

853-1687 22041

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.

The 87C528 contains a 32k

× 8 EPROM and the 87C524 contains a

16k x 8 EPROM. Both devices have a 512

× 8 RAM, four 8-bit I/O

ports, two 16-bit timer/event counters (identical to the timers of the

80C51), a 16-bit timer (identical to the timer 2 of the 80C52), a

watchdog timer with a separate oscillator, a multi-source,

two-priority-level, nested interrupt structure, two serial interfaces

(UART and I2C-bus), and on-chip oscillator and timing circuits.

In addition, the 87C524/87C528 has two software selectable modes

of power reduction—idle mode and power-down mode. The idle

mode freezes the CPU while allowing the RAM, timers, serial port,

and interrupt system to continue functioning. The power-down mode

saves the RAM contents but freezes the oscillator, causing all other

chip functions to be inoperative.

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 V

CC = 5 V

ORDERING INFORMATION

EPROM

TEMPERATURE oC RANGE

AND PACKAGE

FREQ

(MHz)

Drawing

Number

P87C528EBP N

0 to +70, Plastic Dual In-line Package

SOT129-1

P87C528EBA A

0 to +70, Plastic Leaded Chip Carrier

SOT187-2

P87C528EBB B

0 to +70, Plastic Quad Flat Pack

SOT307-2

P87C528EFP N

–40 to +85, Plastic Dual In-line Package

SOT129-1

P87C528EFB B

–40 to +85, Plastic Quad Flat Pack

SOT307-2

P87C524EBA A

0 to +70, Plastic Leaded Chip Carrier

SOT187-2

P87C524EBB B

0 to +70, Plastic Quad Flat Pack

SOT307-2

NOTE:

1. For ROM & ROMless devices, see data sheet P8X524/528.

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