Subject: RE: [IBIS-Users] Multiple Supply voltages in IBIS
From: Matthew Flora (mflora@innoveda.com)
Date: Tue Jul 09 2002 - 13:20:39 PDT
Dear Stacy Gore,
As I understand it, the [Model Selector] was meant to be used on components
with configurable pins. For example, a processor with selectable bus speeds
or an FPGA that allow a choice of buffers to be used with a pin.
Best regards,
Matthew Flora
> -----Original Message-----
> From: Stacy L Gore [mailto:Stacy_L_Gore@raytheon.com]
> Sent: Tuesday, July 09, 2002 12:20 PM
> To: Lynne Green
> Cc: ibis-users@server.eda.org; owner-ibis-users@server.eda.org;
> skalidas@idt.com
> Subject: RE: [IBIS-Users] Multiple Supply voltages in IBIS
>
>
>
> On a related subject---
> Does anyone know what the future intent of the [Model
> Selector] section?
> I was hoping that the tool vendors had some plans to utilize
> this with some
> external trigger to use different I/O models within the same
> IBIS model
> based on circuit configuration (like supply voltage).
> I am really not sure what the section was ever intended to be
> used for.
>
> Stacy Gore
> Raytheon
>
>
>
>
>
>
>
> "Lynne Green"
>
>
> <lgreen@cadence.com> To:
> "Senthilkumar.Kalidoss" <skalidas@idt.com>,
> <ibis-users@server.eda.org>
> Sent by: cc:
>
>
> owner-ibis-users@ser Subject:
> RE: [IBIS-Users] Multiple Supply voltages in IBIS
>
> ver.eda.org
>
>
>
>
>
>
>
>
> 07/09/2002 01:15 PM
>
>
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> Hello, Senthil,
>
> It is necessary to make two different models. The two models will
> have different values for some of the voltage keywords.
>
> The related keywords are [Voltage Range], [Pullup Reference],
> [Pulldown Reference], [POWER Clamp Reference], and
> [GND Clamp Reference].
>
> Best regards,
> Lynne
>
> Dr. Lynne Green
> Senior Member of Consulting Staff
> Cadence Design Systems, Inc.
>
> "All the world's an analog stage, whereon digital plays bit parts."
>
>
> -----Original Message-----
> From: Senthilkumar.Kalidoss [mailto:skalidas@idt.com]
> Sent: Tuesday, July 09, 2002 10:21 AM
> To: ibis-users@eda.org
> Subject: [IBIS-Users] Multiple Supply voltages in IBIS
>
>
> I have IOs working with two different supply voltages. I
> could specify
> only one sweep voltage in one xxxx.s2i file.
> I use s2ibis2.1 to generate IBIS model. Can you please
> suggest me whether
> it is possible to create only one IBIS model and how?. Or
> is it better to
> create two models for two different voltages?
> Thank you,
> -------
> Senthil
> Integrated Device Technology. Inc
>
>
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