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Message-ID: | <53206871.10800@buffalo.edu> |
Date: | Wed, 12 Mar 2014 10:00:17 -0400 |
From: | "Stephen R. Besch" <sbesch AT buffalo DOT edu> |
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To: | geda-user AT delorie DOT com |
Subject: | Re: [geda-user] Declare a pin as GND in symbol |
References: | <CALSZ9gpUxtTiN16u6SypxwCZWQZGOGeE77peF0YnKs7FrOkpBw AT mail DOT gmail DOT com> <5320667A DOT 6050402 AT buffalo DOT edu> |
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Reply-To: | geda-user AT delorie DOT com |
On 03/12/2014 09:51 AM, Stephen R. Besch wrote: > Rob, > > I've done this in the past and if I recall it's quite straightforward. > Put a suitable pad in the footprint and give it a pin number that > corresponds to the thermal pad under the chip. If the pad doesn't have > a pin number in the part specification, make one up. Then in the > symbol file add a net attribute and set it's value to GND:x where x is > the pin number of the thermal pad. Just make sure that the spelling of > GND matches exactly the spelling used everywhere else. If I recall, > capitalization matters. > > Steve Besch OOPS!! I forgot to mention that there cannot be a pin defined in the symbol file which has the same number at that used in the net=GND:x attribute. I'm not sure what will happen if there is, but I am sure that it is probably undefined. Steve Besch > > On 03/11/2014 05:48 PM, Rob Butts wrote: >> I couldn't find the answer in the symbol guide. >> >> I made a symbol for an 8-pin soic component that has a thermal pad under >> the chip that is recommended to connect to ground. I don't want to show >> the pin on the symbol but want to declare that hidden pin as a GND:1 net >> connection. >> >> I've seen it in symbols but can't find how to do it. >> > > -- fictio cedit veritati
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