hello i am doing one project can 8255 interface without using 8051 IC.....is it possible to that ....just by using the ic 8255 we can interface with led and without programs
hello i am doing one project can 8255 interface without using 8051 IC.....is it possible to that ....just by using the ic 8255 we can interface with led and without programs
The answer is NO
To activate a pin as output you have to send a series of commands to the status register via D0-D7 using also control pins such as CS, WR, RD etc.
How are you going to do that without a microcontroller or huge circuitry with switches, gates and timers????
Hi;
I agree with IanP, and you do not have to stick with the 8051, you can use a PIC for example, just does not make much sense because they already contain I/O ports and almost all PIC has an "On Change Interrupt" feature like the 8255.