PORTC Weak Pull-ups on PIC16F1503

[Darrel Taylor]

The person that said he got PORTC pull-ups to work on a 16F1503, has a total of 1 post on that forum.
Completely unreliable source.

The register, and the pull-ups do not exist in hardware.
No amount of messing with the code will change that fact.

Attempting to write to that address will result in errors from the assembler.
You can use the FSR's to indirectly write to address 020E ... but no pull-ups will activate on PORTC, because they're not there.
And when you read it back it returns all 0's.
I have actually done that with a 16F1503.

I am not sure who to believe.

I'm Crushed!

[Aussie Barry]

Hi Darrel,

Thanks for the prompt reply and detailed explanation.
Please do not feel crushed. My comments were from complete despair and were not directed at you. I should have known better than to question your reply but I read that someone had managed to achieve what I wanted to do and I saw a glimmer of hope on the horizon.

Time for a re-think on how to achieve my desired result. Thankfully, I do like a good challenge

Cheers
Barry
VK2XBP

[Aussie Barry]

Perhaps I should look at using PIC16F1823 instead of the PIC16F1503?

Darrel, are you aware of any issues with WPUC on the PIC16F1823?

Cheers
Barry
VK2XBP

[Darrel Taylor]

On the 16F1823 ... the weak pull-ups on PORTC work fine.