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® 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 ports or 241/0 pins. Each 1/0 line may be separately established as an input or an output under program control via data direction registers associated with each port. Using the bit change and test instructions of the MC146805E2, each individual 1/0 pin can be separately accessed.
MC146823 Datasheet
