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At 09:54 PM 2/7/04 -0700, Bob Axtell wrote:
>I've never had a problem with flash PICs. However, remember that my
>method has a bypass cap located right at the device across PIC VCC/GND.
>I've always suspected that the cap is critical to proper operation.

feedback:
A while back I had added  pins (+/- vpp pgd pgc) to my homemade clone of a
copy of a reproduction of a facsimile of the jdm/ludipipo programmer.
I was hoping to use  a two foot cable connected to the pins for ICSP.
Wouldn't work at all. Stuck a header wired to a 12F675 in a dip
socket directly on the far end of the cable to isolate but it was still NG.
That same header-socket stuck directly on the programmer board's pins
did work. (I had figured capacitance or crosstalk as I had all wires in
a common shield-)

Bob's directives gave me a jog, I added the 0.1uf across the socket/PIC
Vss Vdd and can now program across the cable.

Will have to try a board with the schottky power isolation to see if I get
true ICSP...

Thanks Bob et al
Dave




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