Bob Blick wrote:
> I have one thing to add. RA4 is open collector when used as an
> output. I
> am sure one could debate about what is acceptable. But I usually tie
> it
> to ground if I'm not using it and don't want to waste a resistor on
> it.

Setting it as a output and driving it low works for this pin too if unused.
That way the single output transistor will be on and the pin won't float.
This is really no different than a totem pole output because the missing
high side driver would be off anyway.


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