Hello. I am new here so if I make a mistake in any way I apologize.
I have a project that I need help with.
I am trying to make a countdown timer that countdown 60min to 0sec using microcontroller AT89S8253.
A buzzer will sound at 0 sec.
My problem is that I do not know how to write in assembly language.
So I need help mostly in that.
p.s if you can throw in some circuit diagram, I am so grateful to you!!!