> > You could be right - I don't believe the manuals (that I use)
> > specifically mention needing a pullup
>
> That would be inappropriate because for some uses of RA4
> you wouldn't want a pullup

What would be an example of that ?

If the major use of RA4 is as a general purpose I/O (which I'm
guessing it is) I think the manual should make at least some
mention of a pullup, and the value range of it. Datasheets for
other ICs with o-c or o-d pins do so

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