Re: [IBIS] Mult-Lingual Model Support in IBIS

Hi Bob,

I think EDA tool may not know which die pad is connected to a certain pin,
so it seems impossible for EDA tool to construct such a connection
automatically.
However, if such connections are provided by model users in his circuit netlist
directly,
then EDA tools can construct the connection as the model users expect.
Is my understanding right ?

Thanks very much
Shulong

Bob Ross wrote:

> Hello Shulong:
>
> In IBIS Version 4.1, there is no direct method to connect the
> die pads to pins listed below. As you discovered, there is no
> reference through [Circuit Call]s for such a connection. So at
> this time the EDA tool would have to provide the connection outside
> of the IBIS syntax.
>
> However, solutions are being discussed and should lead to a
> proposal for IBIS Version 4.2. The proposals will probably involve
> some linkage syntax involving IBIS and the Interconnect Model Specification
> (ICM) for a more general package model.
>
> Regards,
> Bob
>
> slwu wrote:
>
> > Hi,
> >
> > I am still not very clear...so giving an exact example may be more
> > understood for me.
> > In the diagram on Page 112 of the IBIS 4.1 specification, there are several
> >
> > connections between die pads and pins that I can not understand how they
> > are constructed through [Circuit Call]s on Page 113~114
> > 1. "pad_11" <====> "11"
> > 2. "pad_2a"/"pad_2b" <====> "2"
> > 3. "pad_4" <===> "4a" /"4b"
> >
> > Thanks very much
> > slwu
> >
>
> --
> Bob Ross
> Teraspeed Consulting Group LLC Teraspeed Labs
> 121 North River Drive 13610 SW Harness Lane
> Narragansett, RI 02882 Beaverton, OR 97008
> 503-750-6481 503-430-1065
> http://www.teraspeed.com 503-246-8048 Direct
> bob@teraspeed.com
>
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Received on Wed Nov 10 18:05:38 2004