> I don't understand how the wisp628 is able to program a 12F675 ....

Officially it isn't, at least not without the addition of the extra
('dongle') circuit. In practice the Vdd-before-Vpp sequence will work,
unless the /MCLR pin is configured as input.

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
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docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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