On Dec 31, 2006, at 5:06 AM, Gerhard Fiedler wrote:

> can't you use 5V programming in a 3V circuit? Like making
> the rest of the circuit 5V tolerant or creating some kind
> of separation between the micro and the rest...

Hmm.  Suppose the rest of the circuit is NOT 5V tolerant, but
you DO manage to isolate the PIC power, and the programming
pins are dedicated to the programming function (NOT also
connected to non-5V parts.)  Do any of the other PIC pins
become outputs with 5V present at any time during programming?
(that is, if your circuit is NOT 5V tolerant, how much isolation
do you really need to do?)

BillW

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