Thanks Peter. This is what I expected. It's unfortunate the library I have
is inherited from another designer via a PCAD import. I do not like the
hidden pins issues either. I usually display them.
It would be prudent for Protel to include a override, allowing unconnected
pins to remain hidden. By default, hidden connectivity could be left
enabled. It certainly would reduce the seen snow on schematics. Practically,
this could be achieved in the pcb library editor with a No Connect option in
the otherwise "No Net" option box.
Fabe
Fabian Hartery
Guigne International Limited
Paradise, Newfoundland
-----Original Message-----
From: Peter Bennett [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 14, 2001 5:08 PM
To: Protel EDA Forum
Subject: Re: [PEDA] Strange behavior on unconnected pins
Fabian Hartery wrote:
>
> Hi Everyone,
>
> I have some real strange behavior going on with the dreaded hidden pins.
> These are being assigned sub-nets and are showing global netlist behavior
> where none exists. That means, a floating terminal of part 1, pin 2, is
> shown associated with pin 2 of part 2. I would have suspected that a parts
> definitions are held in a 'local' definition and not a global one. I can't
> see an applicable rule affecting this, unless there is a rub in the
> protocol of creating a netlist.
>
Hidden pins will be assigned to a net containing all hidden pins of the
same name in any component. This is one of the hazards of using hidden
pins.
Hidden pins are intended to be used for power and ground, which you
normally would want connected on all components. DO NOT use hidden pins
to represent unused or "no connect" pins, or Protel will connect them
all together.
--
Peter Bennett
TRIUMF
4004 Wesbrook Mall, Vancouver, BC, Canada
GPS and NMEA info and programs:
http://vancouver-webpages.com/peter/index.html
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