I have a 16F676, with a couple of switches on the port 'A'. I had enabled the internal weak pullups, and they seemed to be working fine. Until now...
The circuit started behaving very unexpectedly, till I noticed that the internal pullups did not seem to be doing their job; it was as if the switches were all permanently pressed. I confirmed this by using a fresh device, which worked perfect.
Now, I wonder how safe is it to rely on the inernal pullups? Is this likely to happen again? To be fair, this is the first time I've had a pic go bad in this particular fashion.
Regards,
Anand
Bookmarks