Explain modes of PPI 8255 with timing diagram.

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written 5.6 years ago by

8255 PPI supports three modes for data transfer:

Mode 0 (Simple Bi-directional I/O)

Port A and Port B used as two simple 8-bit I/O Ports. Port C is used as 2 simple 4-bit I/O Ports. Each port can be programmed as input or output individually. Ports do not have handshake …

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