MC146823 - Motorola Semiconductor

MC146823 CMOS Parallel Interface

® MOTOROLA MC146823 Advance Information CMOS PARALLEL INTERFACE CMOS IHIGH-DENSITY HIGH-PERFORMANCE SILICON-GATE) PARALLEL INTERFACE The MC146823 CMOS parallel interface (CPI) provides a universal means of interfacing external signals with the MC146805E2 CMOS microprocessor and other multiplexed bus microprocessors. The unique MOTEL circuit on-chip allow.

Features

include:
• 24 Individually Programmed 1/0 Pins
• MOTEL Circuit for Bus Compatibility with Many Microprocessors
• Multiplexed Bus Compatibility with: MC146805E2, MC6801, MC6803, and Competitive Microprocessors
• Data Direction Registers for Ports A, B, and C
• Four Port CliO Pins May Be Used as Control Lines for: Four Interrupt Inputs Input Byte Latch Output Pulse Handshake Activity
• 15 Registers Addressed as Memory Locations
• Handshake Control Logic for Input and Output Peripheral Operation
• Interrupt Output Pin
• Reset Input to Clear Interrupts and Initialize Internal Registers
• 3.0 Volt.