> > I can see what the OP is saying, with the diode in place, MCLR
> > is essentialy free to float when the capacitor voltage is low
> > and the diode is reverse biased.
> > There should really be a pull down on MCLR.
> 
> Yes !  That's exactly what I meant !

Ah!  I see (said the blind man ;-)).

AFAICT, the problems associated with the Schottky/cap pair
in that circuit make it undesirable.  The other ugly fact is that
if one were to ground that MCLR pin, one would be left with a
capacitor charged to 5V grounded through that Schottky-
maybe not such a good thing.

I'm going to stick with the pullup only.

Mike H.

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