Hello Unregistered ,
Originally Posted by Macgman2000 yes as input. And internal oscillator, I suspect. In which case, vpp-before-vdd is the only option that can resurrect the chip.
OK I got it to work. Had to use pin#4 on the USB programmer header, not external power. It supplies switched vdd to the mcu. I assumed that it takes into account the unique programming cadence for the 12F. I assumed correct, thanks all! Nick
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