Microprocessor and Computer Architecture, Notes

What will be the bit format of command byte A in 82C55A PPI for these arrangement, (i) Mode 0, Port A as input, port B and port C as output. (ii) Mode 1, port A as output, port B as input.

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Last updated on June 13th, 2020 at 08:31 pm

(i) Required Bit Format of command byte A: 




          So the bit format will be 10010000.


          (ii) Required Bit Format of command byte A: 


So the bit format will be 1010×11×.