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80C451 80C51 8-bit microcontroller

80C451 Description

INTEGRATED CIRCUITS 80C451/83C451/87C451 80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless, expanded I/O Product specification Supersedes dat.
The Philips 8XC451 is an I/O expanded single-chip microcontroller fabricated with Philips high-density CMOS technology.

80C451 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

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80C51 8-bit microcontroller NXP
NXP 80C451-like datasheet