P87C453EBAA datasheet(2/26 Pages) PHILIPS

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Philips Semiconductors

Preliminary specification

83C453/87C453

80C51 8-bit microcontroller family

8K/256 OTP/ROM, expanded I/O

1998 Apr 23

DESCRIPTION

The Philips 8XC453 is an I/O expanded single-chip microcontroller

fabricated with Philips high-density CMOS technology. Philips

epitaxial substrate minimizes latch-up sensitivity.

The 8XC453 is a functional extension of the 87C51 microcontroller

with three additional I/O ports and four I/O control lines. The 8XC453

is available in 68-pin LCC packages. Four control lines associated

with port 6 facilitate high-speed asynchronous I/O functions.

The 87C453 includes an 8k

× 8 EPROM, a 256 × 8 RAM, 56 I/O

lines, two 16-bit timer/counters, a seven source, two priority level,

nested interrupt structure, a serial I/O port for either a full duplex

UART, I/O expansion, or multi-processor communications, and

on-chip oscillator and clock circuits.

The 87C453 has two software selectable modes of reduced activity

for further power reduction; idle mode and power-down mode. Idle

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

and interrupt system to continue functioning. Power-down mode

freezes the oscillator, causing all other chip functions to be

inoperative while maintaining the RAM contents.

FEATURES

• 80C51 based architecture

• Seven 8-bit I/O ports

• Port 6 features:

– Eight data pins

– Four control pins

– Direct MPU bus interface

– ISA Bus Interface

– Parallel printer interface

– IBF and OBF interrupts

– A flag latch on host write

• On the microcontroller:

– 8k

× 8 EPROM

Quick pulse programming algorithm

Two-level program security system

– 256

× 8 RAM

– Two 16-bit counter/timers

– Two external interrupts

• External memory addressing capability

– 64k ROM and 64k RAM

• Low power consumption:

– Normal operation: less than 24mA at 5V, 16MHz

– Idle mode

– Power-down mode

• Reduced EMI

• Full-duplex enhanced UART

– Framing error detection

– Automatic address recognition

ORDERING INFORMATION

EPROM1

ROM

TEMPERATURE

°C AND PACKAGE

FREQ.

(MHz)

PKG. DWG

P87C453EBAA

OTP

P83C453EBAA

68–Pin Plastic Leaded Chip Carrier, 0 to +70

3.5 to 16

SOT188-3

NOTE:

1. OTP = One-Time Programmable EPROM.

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