Interesting and makes sense.  They should've used "interface" instead =20
of "header" then.  Will pay attention to my future chip selection for =20
this, though the header is not expensive.

Cheers,
-Neil.



Quoting alan.b.pearce@stfc.ac.uk:

>> I don't know this board off-hand, but "special debug header" to me,
>> should just be a header, which to me, should mostly be some
>> interconnection adapter.  Is there any special logic in these things
>> such that some devices cannot be debugged without it?  If so, this
>> would certainly affect my choice of chips in the future.
>>
>> Cheers,
>> -Neil.
>
> Yes, the 'special logic' is a special version of the chip with extra =20
> pins and the debug logic, which is brought out to those pins. The =20
> chip is on a PCB that has pins designed to plug into a DIL socket, =20
> and has an RJ11 connector on it for the debug port, so you don't =20
> lose any of the I/O pins while debugging.
>
> Microchip have been doing these for some time for the 12F and small =20
> 16F series, and there are even some 24F devices where one needs to =20
> do this for debugging.
>
> For some devices it makes sense to use a larger chip that has the =20
> debug capability to develop the code, then recompile it for the =20
> smaller chip, and if need be do 'crash & burn' type debugging for =20
> the last stage if absolutely necessary.
>
>
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>
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