> Chaps, can someone tell me if the LVP / RB5 pin on a
> PIC18F452 needs to be tied low?

The problem is your word 'needs'. I don't know whether it is realy
needed, like I don't know whether that 100 nF cap near the PIC is
needed, or whether you realy need those caps at the crystal. But I sure
know that I'd rather keep them all in place and not risk problems.

> If I do tie RB5 low, then I lose a pushbutton, since I have a
> bank of 4
> switches on RB4,5,6,7 which use the internal weak pull-ups, with the
> switches pulling low through 1k when pressed.

Use a pull-down that is weaker than the internal weak pull-ups. Or use
Wisp628 which has a dedicated LVP pull-down line :)

Wouter van Ooijen

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