How is 8255 programmable peripheral interface configured, Electrical Engineering

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How is 8255 (Programmable Peripheral Interface) configured if its control registercomprises 9B h. 

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1026_How is 8255 Programmable Peripheral Interface configured.png

9BH => 1001 1011 =>

   b6b5=00-> Mode0

   b4=0-> Port A as input.

   b3=1-> Port C as input (PC7-PC4)

   b2=0-> Mode 0

   b1=1-> Port B as input

   b0=1-> Port C as input (PC3-PC0).


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