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83C451 Datasheet 80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless/ expanded I/O

Manufacturer: NXP Semiconductors

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General Description

The Philips 8XC451 is an I/O expanded single-chip microcontroller fabricated with Philips high-density CMOS technology.

Philips epitaxial substrate minimizes latch-up sensitivity.

The 8XC451 (includes the 80C451, 87C451 and 83C451) is a functional extension of the 87C51 microcontroller with three additional I/O ports and four I/O control lines for a total of 68 pins.

Overview

INTEGRATED CIRCUITS 80C451/83C451/87C451 80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless, expanded I/O Product specification Supersedes data of 1998 Jan 19 IC20 Data Handbook 1998 May 01 Philips Semiconductors.

Key Features

  • except the on-board 4k × 8 ROM. The 87C451 has 4k of EPROM on-chip as program memory and is otherwise identical to the 83C451. The 8XC451 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. PIN.

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