RE: [IBIS-Users] Which IBIS version to use???

Tim,
 
The list of features that any simulator supports is generally not driven
by the state of the spec, nor politics, but almost entirely economical.
If a simulator vendor finds from customer input or market research (or a
wild guess) that they can sell more licenses by including a certain
feature and the work to implement it gives a good return on invested
time, then it will happen. That's why nearly every simulator supports
some features of IBIS 3.2, but not some other feature. If you are buying
100 licenses of my favorite SI simulator and demand support for [TTgnd]
before you will buy, then it will probably be implemented in the next
release. Simple as that.
 
Regards,
Weston
 

________________________________

From: Nash, Tim J (FL51) [mailto:Tim.J.Nash@honeywell.com] 
Sent: Tuesday, July 12, 2005 2:36 PM
To: Beal, Weston; ibis-users@eda.org
Subject: RE: [IBIS-Users] Which IBIS version to use???


Weston,
 
I've noticed what you are talking about.  If you look in any
documentation for ICX or Hyperlinx (I'm not sure about SpectraQuest), I
don't think that global support for any particular version of IBIS is
explicitly stated anywhere.  I'm not sure why this is.  Is it because
the standard is in such a state of flux (i.e. growth of keywords) or is
the reason more political in nature?  I know I'm speculating as to what
the reason may be, but it makes it difficult to plan any sort of
analysis, when your not clearly sure of what a tool does and doesn't
support without reading the manual cover-to-cover.  If tools said they
support version 3.2, then you could rest assured that it supported
EVERYTHING in 3.2, not just KEY FEATURES of 3.2. 
 
Thanks,
Tim

________________________________

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of Beal, Weston
Sent: Tuesday, July 12, 2005 5:06 PM
To: ibis-users@eda.org
Subject: RE: [IBIS-Users] Which IBIS version to use???


Tim,
 
Since IBIS 2.1 I've not seen any simulator that support and utilizes all
keywords and parameters of any version of the IBIS spec. You need to
evaluate what aspects of the IBIS spec apply to your I/O pins and use
those appropriate keywords. Then you specify the IBIS version of the
file to be the lowest number that includes the features you've used.
Throughout this process you should read the latest version of the
specification since it will be the clearest and most complete
description of the various features.
 
Even though ICX might not explicitly state that it supports IBIS 4.1, it
does support the [external model], [external circuit], [node
declaration], and [circuit call] keywords quite well. Check the ICX
modeling guide for slight differences from the official IBIS syntax.
 
Regards,
Weston
 

________________________________

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of Nash, Tim J (FL51)
Sent: Tuesday, July 12, 2005 12:27 PM
To: ibis-users@eda.org
Subject: [IBIS-Users] Which IBIS version to use???



There seems to be some confusion among my peers as to which IBIS version
we should be working to.  The latest ANSI version appears to be 3.2, but
there are specifications available up to 4.1.  The parser available in
latest released versions of Hyperlinx and ICX is still v3.2, so I'm not
sure that Hyperlinx or ICX would even recognize v4.1 keywords.  Is there
an "official" committee recommendation of what version should be
utilized in new designs - the latest available, or the latest ANSI
approved version?

Thanks in advance, 
Tim 



__________________________________ 
Timothy J. Nash, P.E. 
Honeywell, Inc. 
Defense & Space Electronic Systems 
13350 U.S. Hwy 19 N 
M/S 825-1 
Clearwater, FL  33764-7290 
Office : 727-539-2437 
Fax     : 727-539-2183 
Email  :  tim.j.nash@honeywell.com 


|------------------------------------------------------------------
|For help or to subscribe/unsubscribe, email majordomo@eda.org
|with just the appropriate command message(s) in the body:
|
|  help
|  subscribe   ibis       <optional e-mail address, if different>
|  subscribe   ibis-users <optional e-mail address, if different>
|  unsubscribe ibis       <optional e-mail address, if different>
|  unsubscribe ibis-users <optional e-mail address, if different>
|
|or email a written request to ibis-request@eda.org.
|
|IBIS reflector archives exist under:
|
|  http://www.eda.org/pub/ibis/email_archive/  Recent
|  http://www.eda.org/pub/ibis/users_archive/  Recent
|  http://www.eda.org/pub/ibis/email/          E-mail since 1993