PIC16F84 PORT_A4 output problem

[Guest]

I don't know why the followings are not work.


while (1) {
output_low(PIN_A4);
delay_ms(100);
output_high(PIN_A4);
delay_ms(100);
}

Please help me to solve the pic16f84 port A4 output problem.

I tried the same thing with Port A3, I had no problem.


- Regards

[dyeatman]

Look at the DATASHEET and the difference between A4 and A0-A3. A4 requires a pullup.

[Guest]

Thanks, now working

pic16f84 port A4 - an open drain output