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.

FEATURES

? 80C51 based architecture

? Seven 8-bit I/O ports

? Port 6 features:

– Eight data pins

– Four control pins

– Direct MPU bus interface

– Parallel printer interface

? On the microcontroller:

– 4k × 8 ROM (83C451)

4k × 8 EPROM (87C451)

ROMless version (80C451)

– 128 × 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, 12MHz

– Idle mode

– Power-down mode