Intel 8255 programmable peripheral interface.
Here we are going to talk about Intel 8255 programmable peripheral interface (PPI). It is a multiport peripheral device, Its main function is to interfacing external microcomputer. And it has three 8-bit ports and that is (i) Port A (ii) Port B (iii) Port C. The port ‘C’ has been further divide into 2 parts, … Read more