ADC input and CMCON0 register

[HighTechPower]

Hi. I'm designing a board with PIC12F683. The datasheet is attached herewith. I'm little bit confused about CMCON0 register. For comparator yes I have to set some values in 3 LSBs but what about if I use these pins as ADC input. Do I still have to declare the COMCON0 register for that GPIO as analog channel or digital channel i.e. if I declare GPIO as analog in COMCON0 then it will be directly connected to comparator which I don't want to use. The confusion arises due to the reason that ADC is also analog channel but I'm declaring it as digital in the said register.

 

[KlausST]

Hi,

Unless otherwise noted in the accirding sections:
* use the ADC configuration register for ADC things only
* use the Comparator configuration register for comparator things only

In doubt read through code examples and/or application notes given by the chip manufacturer.

Klaus

 

[betwixt]

I think the ANSEL register is all you have to set. Internally the signal can go to both the ADC and comparators simultaneously.

Brian.