83C451 Overview
Key Specifications
Operating Voltage: 5 V
Max Voltage (typical range): 5.5 V
Min Voltage (typical range): 4.5 V
Max Frequency: 12 MHz
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.
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
