I thought for a long time or not
CodePudding user response:
In general, the decoder accept A7.. A2 address as input, its Y0 Y1 two output will be selected to an address range, the topic has been said in the address is 80 h, 8255 is 80 h - 83 - h, the same, 84 h - 87 - h will visit ADC0809,As for the program to you according to the topic request, use appropriate language to completed,,,