Re: gEDA-user: Element Libraries for Xilinx chips

[ldoolitt@xxxxxxxxxxxxxxx]

Mark -

On Tue, Jul 04, 2006 at 06:36:13PM -0700, Mark Allyn wrote:
> Does anyone have a set of Newlib type element libraries for
> the Xylinx chips?
> 
> I am looking specifically for their VQFP style package 44 pin
> flat pack chip and their TQ144 style package.

I recommend one of

D. Harmon's footgen
   http://dlharmon.com/geda/footgen.html
Disadvantage: although it has the Xilinx BGAs entered,
you need to add your packages to its database.  That's
pretty easy, though.

or my old QFP menu, part of stock pcb.
I just tried it, it "just worked".  Amazing it didn't
get broken with all the other changes lately.
It couldn't find its library, although lib/qfp.dat is
part of the pcb source tree.  Copy that file to your
home directory, and you should see a library entry titled
  TQFP-144 Xilinx XCV50
Disadvantage: not newlib, and you'll have to double-check
the footprints.  AFAIK none of the entries there have
been proven in a board design.

That latter problem applies (more or less) to _every_
footprint in PCB, until someone comes up with a database of
footprints that includes revision histories, and various
stages of sign-off, concluding with "volume production of
machine-stuffed boards, with low field failure rates after
five years".

    - Larry
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