I am using the kit EVB9S12NE64UM , and I wonna to use port A & port B as a gereral I/O ports , when I tried to test these ports by led , I found that they always give one on all pins , even when I send zeros to them why?????
the second question is what is the actual voltage magnitude appeared on the port when it gives logic 1 ( 5 Volt or 3.3 Volt ) , and how can I change ????
plz , help , I wonna to use these two ports separtly to control a graphic LCD