I made a board which uses PIC18F452 to control the working of18 pieces 7 segment LEDs . By multiplexing method, almost all pins in controller are used. All LEDs are functioned correctly except the one that using RA4 pins.
That pin was already configurared as output as were done on others, however, there is no voltage output on this when I measure it.
I tried to put another IC, same phenomenon persists.
Could anybody help to advise what's problme or what mistakes I made?
Thanks
That pin was already configurared as output as were done on others, however, there is no voltage output on this when I measure it.
I tried to put another IC, same phenomenon persists.
Could anybody help to advise what's problme or what mistakes I made?
Thanks