Mail Archives: geda-user/2015/09/21/08:09:28
On Wed, 9 Sep 2015, Edward Hennessy (ehennes AT sbcglobal DOT net) [via geda-user AT delorie DOT com] wrote:
> Would this proposed feature also work for connecting a single pin to
> multiple pads? For example, could three pin symbols for transistors work
> with devices that have four pads? It would be nice to support all the
> relationships:
>
> - one to one
> - one to many (3 pin symbol transistor with a 4 pad footprint)
> - many to one (pass thru pins)
> - many to many
>
> Pass thru pins could make the symbols for parts where the signal passes
> straight through easier to work with. For example, TVS diode pairs, feed
> thru capacitors, and transistors used in current mirrors.
The feature isn't about connected pins/pads on a footprint at all; it's
about grouping multiple nets (or pins) graphically into a single bus net
(or bus pin). Only bus pins may have multiple pinnumbers/pinlabels, and
they have to be connected to a bus of the matching width (e.g., if there
are three pinnumbers on the pin, only buses of width three may be
connected). This will have exactly the same effect as if there had been
three individual (net) pins which had been connected to the three nets.
(Sorry about the delayed answer; I'm only slowly catching up with the list
traffic.)
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