MC146823 Datasheet (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 allows direct interfacing to most industry CMOS microprocessors, as well as many NMOS MPUs.

I The MC146823 CPI includes three bidirectional 8-bit

MC146823 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