Block Diagram 8255. Draw the block diagram of an 8255 ppi chip and describe its different programming modes. Hence we divide port c into 2 parts having 4 bits.
It consists of data bus buffer control logic and group a and group b controls. Data is transmitted or received by the buffer on execution of input or output instruction by the cpu. The port a port b and port c.
It is a bidirectional tri state data bus.
8255 block diagram ei omectionm data 60s e. Pin diagram of 8255 ppi programmable peripheral interface in this article we are going to study the pin diagram of the 8255 ppi programmable peripheral interface. I data bus buffer. The 8255 is a general purpose programmable io device.