> According to Figure 5-5 of DS40300B the F628 does.

Dunno about that version, but on the current 16F628 datasheet (DS40300C)
fig 5-5 clearly lacks the diode that is present for the other pins.

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products

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