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Help:embedded programming for 8051 using 8255

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logukalipal

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I connected 8255 with 8051 in address of 4000H.
also connected keypad [4*4] in port c of 8255.
We can use port c of 8255 into 2 parts using to set control word to MODE0
1) PC0 - PC3
2) PC4 - PC7

While programming(Embedded C) how can i accessing the 2 parts of Port c individually?
 

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