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