Re: gEDA-user: Symbols and pin numbers

[Werner Hoch <werner.ho@xxxxxx>]

Hi Stephen,

On Monday 27 November 2006 23:02, Stephen Williams wrote:
> The problem is that my part (TI sn74avca406l) comes from the vendor
> in two different packages, with slightly different pinout and
> footprint. (One package adds a few reserved pins.) Do I just choose
> a pinout and do the binding between pin and ball in the footprint,
> or is this a choice that matters?

Just create one symbol for each footprint.
If you choose a (graphical) pin layout for the symbol that is identical 
for the different footprints, you can easily exchange the symbol if you 
need the other footprint.

Take a look at the AT90S8515* symbols in the micro lib. Three different 
footprints with three different pinnumbers. But all symbols have the 
pins on the same position.

> The creation guide also suggests including the footprint= attribute
> to choose the footprint, but that may be obsolete advice given the
> arguments past that I've seen on this list.

Well, we're all talking about a better symbol system. But unfortunatly 
nobody wrote it yet ;-).

Regards
Werner


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