> I'm thinking out-of-circuit programming, where if Vdd is 
> supplied by the 
> programmer, it should be simple to cut off/block.

Wisp628 is specifically designed as an in-circuit programmer.

But if you want ex-circuit programming with a Wisp628, just add the
dongle circuit, and supply power using separate 78L05 's for the progger
and the target.

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
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