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.

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