[SI-LIST] Re: IBIS Model for Freescale MC68302
- From: steve weir <weirsi@xxxxxxxxxx>
- To: dburns@xxxxxxxxxx
- Date: Mon, 10 Sep 2007 06:01:00 -0700
Doug, thanks for the plug. We like building models and do a very nice
job with that. But, Orin's got a point: this is a very slow clock
rate. Way back in ancient times Quad took out ads offering solutions
for people who dared tread into the feared land of ... 30MHz!
Regards,
Steve.
Doug Burns wrote:
> Mohit,
>
> The first thing to do is a paper timing analysis to determine your basic
> setup/hold margins. This analysis will give you
> an idea of how critical an accurate analysis is. If you have lots of margin,
> then using good "rules of thumb" for your
> design should be fine. In this scenario, you could even use idealize driver
> models of the proper impedance and slew-rate
> to show you what the signal quality may look like.
>
> If however, the margins look tight (due to large Tco and setup/hold windows
> or that you know your bus has multiple loads
> and is long), then simulation is a good idea. If you have spice models,
> SiSoft provides a Spice-to IBIS conversion
> service at very reasonable rates. If you can not get the spice models, Then
> Teraspeed consulting group has the
> capabilities to develop a good IBIS model from actual components.
>
> Best regards,
>
> Doug
>
>
> Douglas J. Burns
> Vice President, Consulting Services
> Signal Integrity Software, Inc.
> 6 Clock Tower Place
> Maynard, MA 01754
> 978-461-0449 x14
> dburns@xxxxxxxxxx
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
> Behalf Of mohit jain
> Sent: Sunday, September 09, 2007 3:12 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] IBIS Model for Freescale MC68302
>
> Hi All,
> I am doing the SI analysis of the design which has MC68302 processor TQFP144
> Package running at 12MHz.
> IBIS model of this processor is not available on the website, nor I could
> find all the parameters that are requied for the IBIS model in the datasheet.
>
>
> With other equivalent models I am not able to simulate properly, please
> suggest some equivalent IBIS modeI for the same.
>
> Thanks in advance.
>
> Mohit Jain
> Design Engineer
> R&D Services
> MindTree Consulting Pvt. Ltd.
>
>
>
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--
Steve Weir
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