John Nall wrote:
> Olin Lathrop wrote:
>>> You can use the PIC_CTRL program to see if the EasyProg can drive
>> the lines
>> properly.
>>
>>  pic_ctrl -vdd 5  [etc]
>
> Well, I have about decided, after doing the tests you suggested and
> reading the stuff on ICSP with the EasyProg that there is just a basic
> incompatibility between the demo board  and  the EasyProg.
> Specifically, I  think that it is because the demo board requires its
> own power supply, and of course the EasyProg won't go along with that,

There is no need for that to be a basic incompatibility.  I don't see how
the demo board "requires it's own power supply" when being programmed.  Why
does anything need to be on except the PIC?  How much Vdd current does it
draw when the power supply is off?  You never said what the results of your
PIC_CTRL tests were, so I can't really say much more.

> Just running the 5 lines from the RJ12 cable to the appropriate pins
> on the 3013 would work without anything further needed, wouldn't it?

Most likely not, especially if using the standard Microchip ICD2 cable.  If
this is a stand along ZIF socket, put the 100pF caps on PGC and PGD right
where they enter the board, and 100 ohms in series with PGD from there to
the PIC pin.  Then put a 100nF or 1uF ceramic bypass cap on Vdd to ground as
close as possible to the PIC.


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