but a multiplexer only has one output port. what i need is something that has at least 8 output ports and multiple input ports.
you see if i use a multiplexer i still need to switch so many times just to cover all the pins of the ICs. what i want to do in my program is read the port of the MCU just ones, for example if P0 is = 0100 1001 do this " " ....if i use a multiplexer i need to read the I/O port of the MCU one at a time and at the same time controlling the selector pin of the multiplexer.