Hi Richard, On Sun, Feb 16, 2003 at 06:51:26AM +1300, Richard Barrington wrote: > Hi, > > I'm a new gEDA user, and have just made an additional micro-controller > component as per the docs, but the components on-line mostly see to > provide power pins rather than using power nets. Explicitly defining > them as pins makes more sense to me, particularly when you have multiple > power inputs (Vss, Vssa), but the docs suggest doing it the other way. > So it prompts me ask which is correct / preferred? > > Richard.
I'm new to gEDA too and a wondering about the same thing (did not post the question yet though). The doc on this topic (net= attribute mini-HOWTO, http://www.geda.seul.org/docs/20021103/netattrib/netattrib.txt) advises to use net= attributes for the power pins, without visible power pins on the symbols. It also signals the fact that most symbols in the current library await addition of the net= attribute (and I guess removal of the visible power pins). But I wonder how to go about this for e.g. a DC-DC converter that I am planning to use, which is providing power for the rest of the circuit. And how to go about auto-power-down circuitry, where one part of the circuit is shutting down or re-powering another part. This requires defining net= attributes for each part of the circuit that shares its power supply. With regard to readability of a circuit, I guess it's a trade-off between having to match net= signal names, or having possibly many power wires running around. Experienced gEDA users out there: please comment. Thanks, Jan Stap
