The Microchip "ICSP" guide has a sample driver board schematic, but �I have
not tried it so can't comment on how well it works. I have used a Needham
Emp20 �with a handmade adapter and that worked fine. Am now using the
Promate II with the "ICSP" adapter which cost an extra $300 in addition to
the cost of the programmer. This setup is working very well and I have only
4.7k isolation resistors.

@
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06/17/99 09:05 AM MST
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Subject: In circuit programming


Hi Folks,

I am new to the list, and relatively new to PICS. �I poked thru the
archives looking for this answer, but didn't find it. (It may be there,
though: that's a big archive)

I tried what someone else had tried: i wired the picstart into my
circuit to program the pic 12c672. �For me, in circuit means the chip is
in the final application, with no dips, etc to isolate it. I generally
have 10k loads on the pins.

Is there a modification you can make to the picstart (a buffer, etc)
that will allow it to program in circuit? �Is there another relatively
inexpensive programmer that will do this? �The microchip pro-mate costs
$1000, which i will spend if we go into production with this circuit,
but for prototyping, it's a little high.

Thanks for any help,
eric

Eric Hufstedler
Kilovac Division of CIIT
Research & Development
805-684-4575 x152
erich@kilovac.com