Byron A Jeff wrote:
> I have some "how is it really done" questions. Since I branched off
> into bootloader world quite a while ago, I have spent no significant
> amount of time working with ICSP/ICD style configurations. PGC and
> PGD must be used in these configurations. So what is the trend in
> terms of applications usage of these pins? Are they simply dedicated
> to the ICSP/ICD interface? If they are multiplexed then how does that
> interfere with ICSP or ICD?

Usually I take ICSP into account in a design, but not specifically ICD2
since I'll be using an ICE for anything serious.  Customers are almost
universally using ICSP during the production test process to put the latest
code on the PIC as part of the manufacturing process.  Most of the time ICSP
can be dealt with without too much trouble.  The hardest is when using 10Fs.
When the PIC only has 6 pins and 5 of them use used for programming, it
becomes a major design consideration.  The larger the PIC the easier it is
to just dedicate lines for ICSP, or find compatible uses to multiplex the
pins with.


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