CHMOS PROGRAMMABLE PERIPHERAL INTERFACE he The Integral IN82C55AN is a high-performance, CHMOS version of the industry standard IN82C55AN general purpose programmable I/O device which is designed for use with all Intel and most other microprocessors.
It provides 24 I/O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of operation.
e U 4 t m o .
c TECHNICAL DATA IN82C55 w MODE 0, each group of 12 I/O pins may be programmed in sets of 4 and 8 to be inputs or w In outputs.
In MODE 1, each group may be programmed to have 8 lines of input or output.
3 of the remaining 4 pins are used for handshaking and interrupt control signals.
MODE 2 is a strobed bidir...

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