Olin Lathrop wrote:

> I just want to make it clear to everyone that this is the
> pinout of the jack on the ICD2 or any compatible programmer.
> When using the standard Microchip ICD2 cable, the target board
> needs to be a mirror image of this.  In other words, pin 1 is
> Vpp, pin 2 Vdd, pin 3 GND, etc.


Ken Pergola wrote:

> Yes, Microchip supplies the ICD 2 with a 'cross-over' modular cable.
> If one deviates from this [...] pinning and uses a 'straight-through'
> modular cable, then their target pinout will not match

The cross-over modular cable is is, by far, the most common style.
It follows telephone industry practice.  Since Microchip chose to
use a 6-position modular jack (i.e. RJ11/RJ12 style) on the ICD2,
they should expect people will use "normal" cables.

The cable used in most RJ11/RJ12 telephone cables has a flat jacket,
frequently called silver satin.  Look closely and you'll see that it
usually has a raised ridge on one side.  When the cable is installed
in a crimp-on modular plug, the raised ridge is installed facing the
same way on both ends -- thus, each cable has a built-in crossover
(end A pin 1 goes to end B pin 8, A pin 2 goes to B pin 7, etc).

Making a straight-through cable requires flipping the cable over
on one end.  It's easy to do ... but it's _very_ rarely done.

						Lee Jones

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