One can configure 8255 in different modes by sending appropriate control word to the control word register. Bidirectional Input Output mode or Mode 2 is used only for Group A port pins of 8255. In this mode Port A is used as bidirectional Input Output port. When a bidirectional peripheral is connected to the 8255 then this mode is used. In this video Mode 2 of 8255 is explained with timing diagram and proper explanation.
19 сен 2024
