Herbert Graf wrote:

> > Wouldn't that be used for programming the part?
> > Aren't JTAG interface kits pretty easy to build or inexpensive to
> > purchase?
>
> Hehe, never even though of that, I programmed it with a universal
> programmer, but you are right, it is just a jtag part and other colleagues
> have programmed it using simple parallel port connected jtag hardware. That
> also suggests that it has inbuilt in circuit programming support. TTYL

and Dan Wheeler wrote :

> Yep, the xc95xx series is dead easy to program through the jtag port.  Just
> build a parallel port jtag programmer (2 74HC125's and a few resistors).
> The free downloadable software works great.


As I wrote in another post, connect the CPLD JTAG pins to a couple of
pins of the PIC, and a JTAG download routine in the PIC firmware and add
a CPLD download function to the PC app. Then you could mount
a un-programmed CPLD to the PCB and just begin with a download
of the CPLD "bin-file" from the PC-app. Nice for future upgrades also !


Jan-Erik.

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