X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient: geda-user AT delorie DOT com
Message-ID: <5320667A.6050402@buffalo.edu>
Date: Wed, 12 Mar 2014 09:51:54 -0400
From: "Stephen R. Besch" <sbesch AT buffalo DOT edu>
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: <CALSZ9gpUxtTiN16u6SypxwCZWQZGOGeE77peF0YnKs7FrOkpBw AT mail DOT gmail DOT com>
In-Reply-To: <CALSZ9gpUxtTiN16u6SypxwCZWQZGOGeE77peF0YnKs7FrOkpBw@mail.gmail.com>
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

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

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