Hi. I'm having some questions on PIC16F877 IC. I really hope somebody can help me out with this coz it's confusing after study thru datasheet.
1. Is it true that setting Vref on RA3 & RA2 (pin4&5) would help to stabilize the IC? If so, how do I set it? is it just configure it as input port ( TRISA=0x0C).
2. my programmer is showing error "configuration programming error" while I was flashing my program lately. I changed PC, 7407 IC, transistor on programmer kit, check the voltage regulator on the kit, all seems alright. I suspect the parallel port cable would have caused this problem, but is it possible? coz I tried using other programming kit and it did sometimes give this probs but the bottom line is, most of the time it works.
1. Is it true that setting Vref on RA3 & RA2 (pin4&5) would help to stabilize the IC? If so, how do I set it? is it just configure it as input port ( TRISA=0x0C).
2. my programmer is showing error "configuration programming error" while I was flashing my program lately. I changed PC, 7407 IC, transistor on programmer kit, check the voltage regulator on the kit, all seems alright. I suspect the parallel port cable would have caused this problem, but is it possible? coz I tried using other programming kit and it did sometimes give this probs but the bottom line is, most of the time it works.