Kyrre Aalerud wrote :

> According to the datasheet, there is no internal pull-up 
> available at all in the 12F675.

According to *my* copy of the data sheet, there are.
For all pins but GP3/MCLR.

> But this is supposed to be irrelevant as I want to program 
> the chip NOT to have or use MCLR as reset at all.
> What i wonder is if the device could interpret static buildup 
> on the pin as VPP and halt operation.

Just as with *any* input pin on *any* CMOS device (PIC or
whatever), it should *not* be left floating.

> > > If I disable MCLR, do I still need to use a pullup on this 
> > > pin to make sure my circuit starts reliably?

If you disable (external) MCLR, that pin has nothing to do
with POR any longer.

Jan-Erik.



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