Re: [SI-LIST] : response to semiconductor I/O edge rates

jonp@pacbell.net
Fri, 16 Jul 1999 12:54:41 -0700

Around here we have the problem that we usually can't GET the lastest IBIS models from the IC vendors because they are "Proprietary". Even when we do get to look at them we seldom can share this knowledge with our customers. And I
thought that the purpose of IBIS was so we could share and not worry about secrets.

Chan, Michael wrote:

> The interesting outcome on the low priority of assigning people to work
> on the latest version of IBIS from the EDA firms is that the system
> engineers will
> always be the first to receive the latest version of IBIS models from the
> IC vendors while at the same time cannot work on any EDA tool at all !!!!!!
>
> MC
>
> -----Original Message-----
> From: Roy Leventhal [mailto:Roy_Leventhal@mw.3com.com]
> Sent: Friday, July 16, 1999 12:20 PM
> To: si-list@silab.eng.sun.com
> Subject: Re: [SI-LIST] : response to semiconductor I/O edge rates
>
> To All, or No One In Particular:
>
> Which came first: The chicken, the egg, or the ruptured duck?
>
> We're sitting here with a programmable part that I can only deal with in a
> horse-and-buggy fashion
> (funny how that "buggy" word keeps turning up in talking about EDA) on a
> current hot project.
>
> Wouldn't even have found out much about the lack of implementation of
> programmable devices in IBIS
> if I hadn't been working on another issue: A supplier (different one folks)
> who
> doesn't seem to understand
> the [ Pin ] keyword and the necessity to tell the simulator, by pin number,
> which I/O cell characteristic to use.
>
> Say, D.C. how long have the conventions for the [ Pin ] keyword been
> published?
>
> Damm! N'other burr under my saddle!
>
> Roy
>
> "D. C. Sessions" <dc.sessions@vlsi.com> on 07/16/99 11:13:11 AM
>
> Please respond to si-list@silab.eng.sun.com
>
> Sent by: "D. C. Sessions" <dc.sessions@vlsi.com>
>
> To: si-list@silab.eng.sun.com
> cc: (Roy Leventhal/MW/US/3Com)
> Subject: Re: [SI-LIST] : response to semiconductor I/O edge rates
>
> Roy Leventhal wrote:
> >
> > Good points about etch length and edge rates.
> >
> > Somewhere else in the discussions the issue of programmable drive was also
> > brought up. We are using progarmmable drive strength and a fixed series
> source
> > terminator (selected by daughter card loading) in at least one instance.
> >
> > Does anyone know a signal integrity simulator that is up to snuff on IBIS
> 3.2
> > especially with regard to the conventions on programmable devices and has
> > automated the handling of such parts?
>
> The EDA members of the IBIS committee report that their managements have
> assigned IBIS 3.x support a low priority due to lack of customer demand.
>
> --
> D. C. Sessions
> dc.sessions@vlsi.com
>
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