Purpose of control word written to control register in 8255, Electrical Engineering

What is the purpose of control word written to control register in 8255?

The control words written to control register state an I/O function for every I.O port. The bit D7 of the control word verifies either the I/O function of the BSR function.

 

Posted Date: 6/4/2013 1:39:18 AM | Location : United States







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