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What are the features used mode 2 in 8255?

  Shared By: Adalrico Fischer    Date: Sep 21    Category: Assembly Language    Views: 2185


The single 8-bit port in-group A is available.
1. The 8-bit port is bi-directional and additionally a 5-bit control port is available. 2. Three I/O lines are available at port C, viz PC2-PC0. 3. Inputs and outputs are both latched. 4. The 5-bit control port C (PC3=PC7) is used for generating/accepting handshake signals for the 8-bit data transfer on port A.


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