> If you need to do ICSP only, without debugging, maybe just put a jumper t=
o
> disconnect battery for programming?

I was thinking of doing this in a thingie that must be used by students.=20
Trust them to do it wrong, and I don't like the idea of leaking (or=20
exploding) batteries.

The circuit show by Sergio has one problem: it won't work for PICs that=20
need a power cycle to get into programming mode :(

> Alternatively, can you use PIC that can be
> programmed at low Vpp?  Pickit 3 supports Vpp down to 1.8V.

The problem (with the PICs I considered) is Vdd, not Vpp, especially the=20
Vdd required for a chip erase.

--=20

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
C++ on uC blog: http://www.voti.nl/erblog

--=20
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