gEDA-dev: GAF wish list addition - complex boards having multiple logic families

[Carlos Nieves Ónega]

El dom, 03-09-2006 a las 15:33 -0400, DJ Delorie escribió:
> Would it be sufficient to save "level=5t" (5 volts TTL) or "3.3c" (3.3
> volts CMOS) ?

What about HC, HCT, ECL, LVC and all the logic families out there?
I can also have some HC with 3V supply, or even 2V7...

> And also consider the issue that a "3.3c" but 5v tolerant (3.3v5t?)
> input can be connected to either "3.3c" or "5t" or "5c" outputs.
> 
> I suppose we could tag pins with Voh, VihMin, VihMax, etc.

Are you talking about heavy symbols? ;-)
or maybe filling the data from a database?
The user won't add those attributes to every part he is using by hand!

As soon as we have some way to add the required attributes, I'm sure we
can have a DRC check for them.