DATE: July 11, 1997
SUBJECT: 7/11/97 EIA IBIS Open Forum Minutes
VOTING MEMBERS AND 1997 PARTICIPANTS LIST:
AMP Jeff Walden
Applied Simulation Technology Dileep Divekar*, Norio Matsui, Raj Raghuram
Cadence Design & UniCAD C. Kumar, Don Telian, Cameron Seitz
Cypress Bruce Wenniger
Digital Equipment Corp. Jeff Chu*
High Design Technology (Razvan Ene)
HyperLynx Kellee Crisafulli, Steve Kaufer
INCASES Olaf Rethmeier, Werner Rissiek
Intel Corporation Stephen Peters*, Arpad Muranyi*, Henry Maramis,
Will Hobbs
Interconnectix Bob Ross*
Mitsubushi Tam Cao, Hoang Nguyen
Motorola [Ahmed Omer], Michael Desiderio*, Paul Bolden*,
Tom Myers*
National Semiconductor Syed Huq, Cheng-Yang Kao, Mike Bristol,
Peter Laflamme, Kevin Smith
NCR Dave Moxley, Richard Mellitz
NEC (Hiroshi Matsumoto)
Quad Design/Viewlogic Jon Powell, Chris Rokusek, Peivand Tehrani
Quantic EMC (Mike Ventham)
Texas Instruments Thomas Fisher
Thomson-CSF/SCTF (Jean LeBrun)
VeriBest Ian Dodd*, William Bell
VLSI Technology Harish Patel, D.C. Sessions
OTHER PARTICIPANTS IN 1997:
3M Fran Hart
Actel Scott Schlachter
Acuson & Free Model Foundation Richard Munden
Alcatel John Fitzpatrick
Ansoft Eric Bogatin
Apteq Design Systems Dan FitzPatrick
Compaq Weston Beal, Mark Leonard
EIA Patti Rusher
EMC Fabrizio Zanella
Hewlett Packard, EEsof Karl Kachigan, Henry Wu
Hewlett Packard, France Jean-Christophe Pautrat*
Hitachi Saburo Hojo, Yasushi Ogawa
IBM Brad Herrman
Interface Technology Dan Waterloo
Micron Technology Brian Johnson
Molex Gus Panella
North Carolina State U. (Michael Steer)
S3, Inc. Porsh Shih, Sarathy Sribhashyam
Symmetry Andy Hughes
TRW Ray Steele
Ultratest International Charles Im*
Zeelan Technology George Opsahl
In the list above, attendees at the meeting are indicated by *. Principal
members or other active members who have not attended are in parentheses.
Participants who no longer are in the organization are in square brackets.
Upcoming Meetings: The bridge numbers for future IBIS teleconferences are as
follows:
Date Bridge Number Reservation # Passcode
August 8, 1997 (916) 356-9200 3-125343 4891173
All meetings are 8:00 AM to 9:55 AM Pacific Time. We try to have agendas out
7 days before each open forum and meeting minutes out within 7 days after.
When you call into the meeting, ask for the IBIS Open Forum hosted by Will
Hobbs and give the reservation number and passcode.
NOTE: "AR" = Action Required.
-------------------------------- MINUTES -------------------------------------
INTRODUCTIONS AND MEETING QUORUM
Michael Desiderio, Program Manager for the Advanced Interconnect Systems
Lab at Motorola, indicated that Motorola is investigating how to provide
IBIS models. He is filling in for Ahmed Omera who has left. Group managers
Paul Bolden and Tom Myers also joined in.
Jean-Christophe Pautrat from Hewlett Packard, France is working with Intel
processors on desktop PC projects and is interested in IBIS models.
MEMBERSHIP UPDATE AND TREASURER'S REPORT
Bob Ross reported that Patti Rusher submitted the ledger as of 5/31/97 of
$9,433 after deducting some meeting expenses.
Two companies have been removed from the Members list because no payment has
been received.
REVIEW OF MINUTES AND AR'S
No Corrections.
Stephen Peters reported on the AR's. The major outstanding ones are for
examples for the Cookbook and BIRDs. Please see the cookbook discussion
below
MISCELLANY/ANNOUNCEMENTS
Bob Ross announced that he will be on vacation starting Saturday, June 12
and should be returning Monday, August 4, 1997. The system administration
duties will be handled by Stephen Peters and Syed Huq.
Syed Huq should be returning from vacation on Monday, July 15, 1997.
Stephen Peters is expecting to take off for two weeks after Friday, July 17
and will be returning August 4, 1997.
PRESS AND WEB PAGE UPDATES
Bob Ross reported that as a result of a press release by Patti Rusher, "IBIS
3.0 Gets Nod From EIA" appeared in EE Times, June 30, 1997, p. 14.
Bob also reported that in EE Times, June 16, 1997, pg., 72, and article
Pacific Numerix Fields EMI-Simulation Analysis Tool mentions using IBIS
or Spice models.
An article "Interconnect Synthesis Methodology" in the July 1997 issue of
Printed Circuit Design, pp. 17-21 mentions IBIS.
NEW MODELS AVAILABLE, LIBRARY UPDATE
Bob Ross notes that these Web sites have added models:
Cypress Semiconductor has added an All Octal FCT model Library (68
Components) for a total of about 102 components.
The IDT download site has about 44 components plus another 11 that can
be obtained from the local FAE.
Bob also notes that an IBIS diode terminator model from California Micro
Devices exits at:
http:://www.calmicor.com/prod/spice/spice.htm
Bob also notes that one can request IBIS models for SRAMS (DRAMS under
construction) at
http://sec.samsung.com/Products/sram/model_request.html
Jeff Chu asked how one submits IBIS models. Bob Ross responded that they are
submitted to the Librarian, Jon Powell (address at the end) and are
checked out using ibis_chk and actual simulation for syntax correctness
and to give feedback regarding results. A submission authorization form
is available on the ibis FTP site under /pub/ibis/models. Some models on
company Web Sites may not have gone through such checking and may have
syntax flaws.
OPENS FOR NEW ISSUES
Bob Ross - On adding GND, POWER and NC reserved words to [Model Selector]
choices.
DESIGN AUTOMATION CONFERENCE (DAC) 1997 EIA BOOTH REPORT
Bob Ross indicated from the previous report that the Booth reported good
traffic and reprints of Syed Huq's December 1996 Article in Electronic Design:
"Ease System Simulation With IBIS Device Models" were distributed. The IBIS
poster at the Booth looked very nice and listed the participating companies.
DESIGN AUTOMATION CONFERENCE (DAC) 1997 EIA/IBIS SUMMIT MEETING REPORT
Bob Ross, reported that 28 people attended the nearly all day session. There
were several interesting presentations in the morning. New EIA/IBIS officers
were elected, and IBIS Version 3.0 was ratified.
INTERNATIONAL PROGRESS
- 93/46/NP (IBIS Version 2.1) - No Report. Expect about a two year process.
- 93/60/NP (IBIS Models and EMC Simulation) - No Report.
- EIAJ III (I/O Interface Model for ICs - Based on the presentations at the
IBIS Summit, we expect another release in September along with a Package
Committee release.
EDITING COMMITTEE
Stephen Peters reported on editing IBIS Version 3.0 for clarity. It could
use a table of contents and a keyword list showing when keywords were
introduced. Bob Ross added other possible improvements - section or chapter
headings, consistency of words per some of the improvements suggested by
Ogawa-san (Vice Chair of the EIAJ subcommittee), a tree diagram, a syntax,
etc. In addition, some of the Cookbook points could be added into the
Specification for clarity. BIRD44 to be discussed later also raises some
editorial clarification points regarding min/max and fast/slow/strong/weak
interpretations.
A suggested process is for Bob and Stephen and anyone else who is interested
to make a first cut at such improvements and put them as a pending Version 3.1
draft in the Work In Progress (wip) directory.
One issue is whether we continue to use the text format (with crude graphics)
or go with Word, HTML, Post Script, or some other format which will allow
better graphics and presentation. Bob and Stephen favored at this time
keeping the reference standard in the text format for maximum portability.
However, we will consider this issue when some we do some of the editorial
changes.
A second issue is whether we hire (or use an internal resource) a technical
writer. Stephen and Bob feel that we first need to make the initial editorial
pass and maintain the historical context first before any major restructuring
is considered. This issue will also be considered after the initial editorial
review.
Bob also indicated that the parser development project also served as an
editorial review because some unclear items were revealed. Version 1.1
followed Version 1.0 and Version 2.1 along with letter ballot review
followed Version 2.0 with parser development motivated improvements.
AR - Bob Ross generate and post a BNF for IBIS Version 3.0 (and IBIS Version
3.0 ratification AR).
VERSION 3.1 PARSER
Bob Ross reported that Paul Munsey, who developed the ibis_chk and ibischk2
parsers essentially no-bid on the ibischk3 parser because he is still
finishing the RAIL parser and is carring on full-time job/family
responsibilities. He may be available for some of the work, but suggested
that we consider other sources.
Bob stated that there are two alternatives: Some internal company resource
that can be dedicated to this project, or hire another contractor.
Stephen Peters suggested that we ask on the reflector if someone is interested
in bidding on the project or if someone can recommend a contractor who might
be interested.
AR - Stephen Peters put a message for parser development interest/bidding on
the IBIS reflector.
COOKBOOK
Stephen Peters reported that he has received some review comments. However,
he has not received any of the promised examples. The AR's (Action
Required) for these examples are listed below. Some additions were
made to the version of the cookbook handed out at DAC regarding
recommended test loads for waveforms. Stephen can provide private copies,
but is not ready to put it on the FTP site yet.
Stephen also reported that based on an internal review, a primer on behavioral
modeling is recommended. He has a writer who will be doing some work in
this introduction section. The IBIS keywords will be illustrated in this
context.
AR - The following people have volunteered to supply examples
Steve Kaufer/Hyperlynx -- Example 1
Arpad Muranyi - Example 2
Stephen Peters - Example 3
AR - D.C Sessions. Supply a paragraph or two explaining the best way to
modify a SPICE transistor model to get realistic power and ground clamp
information
AR - Bob Ross. Supply the text for the section "Diode Transient Time Data"
AR - Syed Huq. Review and expand (if necessary) Section 3.3. on "Obtaining
I/V and Switching Information via Lab Measurement".
AR - Bob Ross submit an example of a Series MOSFET component.
AR - Everyone who received a copy review the document and provide comments
to Stephen Peters (address at the end).
S2IBIS2 ISSUES (& NT)
Ian Dodd reported that VeriBest had withdrawn their s2ibis based on
Version 1.1 s2ibis since it had other errors. VeriBest now has NT/Windows
95 versions of
s2ibis_ver1.3 (for Version 1.1 of IBIS) and s2ibis_ver2.1 (for Version 2.1 of
IBIS) compiled. In order to make them work with NT and Windows, they needed
to deal with file loading problems and code order dependency syntax issues
that compiled differently in Windows environments than in UNIX environments.
Ian's concern is that the code is untested (there are no regression tests
for UNIX versions available). He would like to make the versions available
AS IS for users to use and test. VeriBest would make fixes and corrections
on a time available basis.
Bob Ross felt this was a good plan and VeriBest should put there files on
the VeriBest Web site. There will be four zip files for source and executables
for each s2ibis version. They will be in the location that the official
EIA/IBIS Web page already points to.
AR - Ian Dodd put s2ibis_ver1.3 and s2ibis_ver2.1 for Windows on the VeriBest
Web site.
BIRD42.3 - MODELING CURRENT WAVEFORMS
Bob Ross stated that BIRD42.2 had been considered for Version 3.0, but it was
too controversial to be included. It deals with describing power and ground
current waveforms to assist in power integrity (ground and power bounce) and
SSO (simultaneous switched outputs) detail and also may produce improved
switching algorithm detail. An AR is still pending regarding discussion
on this issue between D.C. Sessions and C. Kumar.
Bob had issued BIRD42.3 to change the keyword syntax. This could be considered
as a Version 3.1 technical addition if it is approved.
Discussion will be deferred until next meeting.
AR - D.C. Sessions and Kumar get together and provide an example showing
where the rising and falling waveform tables do not result in correct
results.
BIRD44 - INTERPRETATION OF MIN/MAX/WEAK/STRONG DATA
Bob Ross reported that Andy Ingraham of Digital Equipment Corporation had
submitted BIRD44 as an editorial improvement to clarify the actual usage
of the min and max columns for data. Bob felt that while it contained good
material, an alternative might be an explanation section at the beginning
of the standard. There already is a large base of models and utilities
(s2ibis) which use the existing min/max column headings and terms.
BIRD44 will continue to remain open for further discussion. We may want to
consider how to resolve it after we do the first pass on the editorial cleanup
of IBIS Version 3.0.
SWITCHING TERMINATORS
Arpad Muranyi has no further work in this area to report. This also could be
considered a Version 3.1 technical extension if a BIRD for this functionality
is issued and approved.
MODEL SELECTOR HANDING OF RESERVED WORDS
Bob Ross introduced briefly that there had been a question regarding whether
GND, POWER, and NC could be included as [Model Selector] choices. Arpad
questioned the need. Bob stated that the Terminator models could be used
for similar functions, especially NC. This will be considered further as
part of the editorial review to propose clarification of this issue. (A
BIRD may need to be issued.)
FINAL ITEMS
Because of holidays and people being on vacation, the next teleconferencing
meeting was scheduled on Friday, August 8, 1997.
NEXT MEETING:
The next meeting is on Friday, August 8, 1997, 8:00 A.M. to 9:55 A.M.
==============================================================================
NOTES
IBIS CHAIR: Bob Ross (503) 603-2523, Fax (503) 639-3469
bob@icx.com
Modeling Engineer, Interconnectix
10220 SW Nimbus Ave, K4, Portland, OR 97223
VICE CHAIR: Syed Huq (408) 721-4874, Fax: (408) 721-4785
huq@rockie.nsc.com
Staff Applications Engineer, National Semiconductor, M/S A-2595
2900 Semiconductor Drive, Santa Clara, CA 95052
SECRETARY: Stephen Peters (503) 264-4108, Fax: (503) 264-4515
sjpeters@ichips.intel.com
Senior Hardware Engineer, Intel Corporation
M/S JF1-56
2111 NE 25th Ave.
Hillsboro, Oregon 97124-5961
LIBRARIAN: Jon Powell (805) 988-8250, Fax: (805) 988-8259
jonp@qdt.com
Senior Scientist, Quad Design/Viewlogic
1385 Del Norte Rd., Camarillo, CA 93010
This meeting was conducted in accordance with the EIA Legal Guides and EIA
Manual of Organization and Procedure.
The following e-mail addresses are used:
ibis-request@vhdl.org
To join, change, or drop from either the IBIS Open Forum Reflector
(ibis@vhdl.org), the IBIS Users' Group Reflector (ibis-users@vhdl.org)
or both. State your request.
ibis-info@vhdl.org
To obtain general information about IBIS, to ask specific questions
for individual response, and to inquire about joining the EIA-IBIS
Open Forum as a full Member.
ibis@vhdl.org
To send a message to the general IBIS Open Forum Reflector. This
is used mostly for IBIS Standardization business and future IBIS
technical enhancements. Job posting information is not permitted.
ibis-users@vhdl.org
To send a message to the IBIS Users' Group Reflector. This is
used mostly for IBIS clarification, current modeling issues, and
general user concerns. Job posting information is not permitted.
ibischk-bug@vhdl.org
To report ibischk2 parser bugs. The Bug Report Form Resides on
vhdl.org in /pub/ibis/bugs/bugform.txt along with reported bugs.
Information on IBIS technical contents, IBIS participants, and actual
IBIS models are available on the IBIS Home page found by selecting the
Electronic Information Group under:
Check the pub/ibis directory on vhdl.org for more information on previous
discussions and results. You can get on via FTP anonymous.
"IBIS Spoken Here" placards are available from Jon Powell (jonp@qdt.com) for
use at trade shows.
==============================================================================
Received on Mon Jul 14 08:39:55 1997
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