X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com Message-ID: <53206871.10800@buffalo.edu> Date: Wed, 12 Mar 2014 10:00:17 -0400 From: "Stephen R. Besch" User-Agent: Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: geda-user AT delorie DOT com Subject: Re: [geda-user] Declare a pin as GND in symbol References: <5320667A DOT 6050402 AT buffalo DOT edu> In-Reply-To: <5320667A.6050402@buffalo.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-PM-EL-Spam-Prob: X: 10% 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