[SI-LIST] Re: Timing analysis
- From: "Carrier, Patrick" <Patrick_Carrier@xxxxxxxxxx>
- To: "Hermann Ruckerbauer" <hermann.ruckerbauer@xxxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Thu, 7 Jan 2010 10:15:10 -0700
You are correct, Hermann. HyperLynx has a built-in easy-to-use wizard
and batch-analysis engine for automatically analyzing SI and timing for
DDR/DDR2/DDR3 memory interfaces because, as you indicate, they can be
quite complicated.
For many other interfaces, timing analysis can be done more manually,
but of course requires a knowledge of the relationship between clock and
data.
One of the misconceptions I see quite often is just using propagation
delay numbers for the signal delay on the board. One of the most
important pieces of any board-level timing analysis is making sure you
actually simulate your interconnect, and get an actual signal "flight
time" based upon interconnect delay AND receiver loading effects, not to
mention other factors.
--Pat
Patrick Carrier
Technical Marketing Engineer
High Speed Design
Mentor Graphics Corporation
Patrick_Carrier@xxxxxxxxxx
ph. (512) 425-3015
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Hermann Ruckerbauer
Sent: Thursday, January 07, 2010 9:49 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Timing analysis
Hi,
My understanding is, that Pratapsimha is not asking for timing analysis
with e. g. Synapticad, but for a Timing budget calculation based on an
analog signal integrity simulation, correct ?
I thought Hpyerlynx would already provide some Timing verification
(Timing budget calculation) tool for different interfaces ?!?
We created our own in excel for Memory interfaces (DDR2/DDR3). But there
is really a lot of work in this template, as it takes automatically the
derating based on slew rate into account.
So I have to admit this was to much work to share it for free ...
regards
Hermann
EKH - EyeKnowHow
Hermann Ruckerbauer
www.EyeKnowHow.de
Hermann.Ruckerbauer@xxxxxxxxxxxxx
Veilchenstrasse 1
94554 Moos
Tel.: +49 (0)9938 / 902 083
Mobile: +49 (0)176 / 787 787 77
Fax: +49 (0)3212 / 121 9008
schrieb Zelno, John:
> Trying to do a timing analysis with a spreadsheet is quite
> complicated, as you need to look at numerous relationships between
> each of the signals in an interface. You'd be much better off using a
> timing analysis tool. We've used SynaptiCAD's tools
> (http://www.syncad.com - Timing Diagramer Pro, Waveformer Pro,
Datasheet Pro) with great success.
> You can also consider TimingDesigner (http://www.timingdesigner.com -
> formerly Chronology's tool, now with EMA Design Automation).
>
> -John Zelno
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx
> [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On Behalf Of pratap simha
> Sent: Thursday, January 07, 2010 5:58 AM
> To: si-list@xxxxxxxxxxxxx; pratapasimha@xxxxxxxxx
> Subject: [SI-LIST] Timing analysis
>
> Hello Experts,
> Can anyone please send me the standard excel spreadsheet template for
> timing analysis for different interfaces, i.e, for calculating Setup
> and hold time margins, using equations.
> I'm verifying timing margins for different interfaces , common clock,
> source synchronous (also double data rate), and Asynchronous schemes
> using Hyperlynx tool.
>
> Thanking you in advance,
> Pratapsimha
>
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>
> List technical documents are available at:
> http://www.si-list.net
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>
> List technical documents are available at:
> http://www.si-list.net
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
