You need:

MCLR, RB6, RB7 and a ground reference as a minimum for ISCP (16F877 - other
chips your milage may vary)

Bob Ammerman
RAm Systems
(contract development of high performance, high function, low-level
software)



----- Original Message -----
From: Clark, John <JohnC@ININ.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Thursday, October 19, 2000 3:17 PM
Subject: Programming and Customizing the PIC Microcontroller


> Myke, I have been referencing your book "Programming and Customizing the
PIC
> Microcontroller" for the past year, and have found it to be a valuable
> reference.  I have a question regarding the "PIC execution hints" section,
> page 295.  You suggest:
>
>         "When developing an application, put in the hardware required to
> allow in-circuit
>         programming of the device.  This can give you a significant board
> manufacturing
>         cost reduction."
>
> Sage advice to say the least.  Casually researching this topic, I have
found
> suggestions to clip a connector to all pins of the in-circuit PIC to be
> programmed.  This will not be a practical or reliable option in my
opinion.
> Likewise, I would rather not include a header connected to every pin of
the
> device.  My goal is to expose the fewest extra pins of the device as
> possible, and many pins are already brought out to headers anyway in my
> design.  My question is where would I learn more about the absolute
minimum
> pins needed for in-circuit programming?  Would you be able to point me in
> any direction?
>
> I have also cc'd the PICList to gain advice from other engineers as well.
>
> Thanks.
>
>
> John Clark
> Indianapolis, IN
>
> --
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>
>
>

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