Am Donnerstag 19 März 2009 16.29:02 schrieb [email protected]: > Hello! > > I have done some symbols (microprocessors etc.) using the djboxsym > tool and I have put the signals as they are located on the real chip > (i.e. correct pin number order). > > I have now looked at some of your schematics and see that some of > you have grouped the signals more logical (i.e. PA0-7, VCC, GND > etc.) together. > > This seems very handy when drawing the schematics but I wonder if > there are any problems with this method? > > As I understand, as long as you define what chip type it is it will > be resolved and correctly translated once you generate the PCB. > > Best regards, > Peter
Hi The schematic just a abstraction of the physics of the board. So you can draw what you want as long as it is correct :). I generally make the symbols as less "physical" as possible to improve the readability of the schematics (and I hate the schematics with a large 150+ pin uC in the middle and a ton of discretes around it ;) ). You can even split up a large uC to smaller portions of it, pe. each port or each funtional block like ethernet or RAM-interface. The only thing you have to make shure is that the symbols splitted up have the same refdes. It is possible to attach a attribute to connect some general pins (like the power-pins) to a net (pe. GND or VCC). This methode is a bit harder to learn, but much simpler to read if you look at your schematics later or have large projects. -- mit freundlichen Grüssen Christian Riggenbach _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
