DATE: August 16, 1995
SUBJECT: 8/11/95 EIA IBIS Open Forum Meeting Minutes
VOTING MEMBERS:
AT&T Global Info Solutions Dave Moxley
Cadence Design Sandeep Khanna, C. Kumar*
Contec CAE, Ltd. Dileep Divekar*
HyperLynx Kellee Crisafulli
IBM Jay Diepenbrock
INCASES Werner Rissiek, Olaf Rethmeier*
Intel Corporation Stephen Peters*, Will Hobbs*, Arpad Muranyi*,
Derrick Duehren
Interconnectix, Inc. Bob Ross*
Meta-Software Les Spruiell, Mei Wong, You-Pang Wei,
John Sliney
Motorola Ron Werner
National Semiconductor Syed Huq*, Atul Agarwal, Cheng-Yang Kao
NEC Hiroshi Matsumoto
Quad Design Jon Powell*
Quantic Labs Mike Ventham
Texas Instruments Roger Cline*, Ben Andresen*
Thomson-CSF/SCTF Jean LeBrun
UniCAD Canada Ltd. Stephen Lum
VLSI Technology Dick Ulmer, Sung Oh
Zuken-Redac John Berrie
OTHER PARTICIPANTS:
ARPA Randy Harr
Anacad Steffen Rochel
Ansoft Henri Maramis
Atmel Corporation Dan Terry
Cadlab Ralf Bruning
Digital Equipment Corp. Barry Katz
EIA Patti Rusher
High Design Technology Michael Smith, Dr. Ing. Cosso
Hewlett Packard Tom Langdorf, Karl Kachigan, Henry Wu
Integrated Silicon Systems Eric Bracken
Intergraph Ian Dodd, David Wiens, Walter Katz
IntuSoft Charles Hymowitz
LSI Logic Corp. Satish Pratadneni
Mentor Graphics Ravender Goyal, Greg Doyle
Micron Technology Brian Johnson
MicroSim Arthur Wong
North Carolina State U. Steve Lipa, Michael Steer
OptEM Engineering, Inc. Benny Leveille, Ken Ehn
Pacific Numerix Paul K. U. Wang
Symmetry Martin Walker
Synopsys, Logic Modeling G. Bill Lattin
Univ. of Illinois, Urbana Raj Mittra*
Zeelan Technology George Opsahl, Hiro Moriyasu
(Independent) Bob Ward
In the list above, attendees at the meeting are indicated by *.
Upcoming Meetings: The bridge numbers for future IBIS teleconferences are as
follows:
Date Bridge Number Reservation # Passcode
8/25/95 (916) 356-9200 1-13824 8492193
9/15/95 (916) 356-9200 1-16347 127231
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, ANNOUNCEMENTS
Ben Andresen and Roger Cline joined as new Texas Representatives from an
I/O group in Dallas and are seeking addition representation from the
Design Automation group.
Dr. Raj Mittra joined later from the Univerity of Illinois to participate
in the package model discussion
MINUTES REPORT, MISC.
Minutes of 7/21/95 to correct repeated "command" under s2ibis 2.1.
OPENS FOR NEW ISSUES
The cmosttl issue (Egg 6) was put on the list.
PRESS UPDATES
A Japanese publication Nikkei Electronics (similar to EDN) has published
an extensive article on signal integrity including prominent mention of
IBIS in the July 31, 1995 issue, pp. 171-184. Will Hobbs supplied IBIS
information for the article and is having it translated into English.
NEW MODELS
Arpad Muranyi updated the entire Intel model library and has supplied
and has supplied some new models including some under "nda" to Michael
Steer.
EIA MEMBERSHIP AND TREASURER'S REPORT
IBM and VLSI have officially become members and have purchased the parser.
Tanner Research, Inc. has purchased the parser. A treasurer's report
was not available.
EIA BALLOT COMMENTS (VOTES)
To date, all ballots with comments are being addressed. There are no
known negative ballots. The known comments and responses were discussed.
The response to Interconnectix, Inc. editorial comments were approved.
The response to the University of Manchester editorial and technical
comments were approved.
AR - Will Hobbs submit the approved response letters to the commentors.
AR - Bob Ross roll the changes into a revised Version 2.1 Specification
including those of the EIA IBIS committee BIRD29.2 response. Send this
rolled up version with changes noted to reflector for discussion at the
August 25 IBIS Open Forum Meeting for final ratification discussion. Bob
also set up the Agenda to include this topic.
Response to Comments by Dileep Divekar of Contec submitted on the reflector
were considered satisfactory. These will not be submitted as formal letter
ballot comments.
Reminder, the Deadline for Comments to EIA-656 is August 22, 1995.
AR - Those who have not commented, submit your comment to EIA. A strong
showing of support is helpful.
LOGO PERMISSION LETTERS
Jon Powell needs permission letters from each company to use logos on
placards and foils. Not everyone has received the letter from EIA.
Jon has received permission letters and logos from National Semiconductor,
UniCad, and Quad Design, and has received logos only from Contec and
Zuken-Redac. Permission letters can be obtained from Patti Rusher at
prusher@eia.org and returned to her. Company logos should be sent to
Jon Powell - Email and address at the end.
ROSTER UPDATE
Based on responses, the roster has been updated. The roster is
maintained on vhdl.org and continuously updated as new information
arrives. Periodically a request will be made for everyone to review
their company's entry and provide update information.
AR - Bob Ross put the updated roster on vhdl.org [DONE] and send to the
reflector the roster.txt along with a request to review the changes
and submit updates and corrections. [DONE]
WEB UPDATE
Syed Huq reported that the IBIS Web page under EIA (www.eia.org/eng) is
expected to be operational August 18 (at the earliest). Search links to
"ibis" or to "EIA-656" are not in place yet. Syed will follow up on this.
The home page will have a hypertext link to /pub/ibis on vhdl.org to connect
to the top level of all posted information. Links will also be to
- All models at the /pub/ibis/models
- All Standards with links to ver1.0, ver1.1, ver2.0, ver2.1
- Roster Listing
The FAQ (Frequently Asked Questions) will be maintained on the Web
and will be entered as approved. Also, comments/problems/suggestions
selections will be provided.
Jon Powell suggested links to companies' IBIS pages. Names could be
entered now, and company logos entered later. This could be pursued
later.
FAQ VOTE
Except for Questions 6, 7, and 17, all were approved as written or per posted
modification.
The answer to Q1 was modified to read "IBIS (Input Output Buffer Information)
is a method of providing the Input/Output device characteristics through
V/I data without disclosing any circuit process information. It can be
thought of as a behavioral modeling specification suitable for transmission
line simulation of digital systems and applicable to most digital components."
The answer to Q2 was modified to read "... All model files must pass the
parser before a model can be released to vhdl.org. ..."
Other changes have been submitted to the reflector. Q6 regarding SSO
needs rewording. Q7 regarding -VCC to 2Vcc regarding data needed
for undershoot and overshoot needs to be resubmitted. Ben Andresen of
Texas Instruments raised the point that such a range is destructive to
forward biased diodes. Will Hobbs' Q17 regarding non-monotonic data was
incomplete. Jon Powell indicated that more information was required for
the model to be simulate properly in the non-monotonic regions.
AR - Jon Powell post a response to Q17 on the reflector - [Done].
Further discussion on Q6, Q7, and Q17 will occur on the reflector, and
these will be on the agenda for next meeting.
MODEL TRACKING
Syed Huq reported no progress in this area.
MODELS UNDER NDA
NDA style models including those from National should be listed in the
00readme file and also should exist by name with an extension such as .nda.
Information on whom to contact should be provided.
GOLDEN PARSER UPDATE
Arpad Muranyi has a "final" version of the parser, although it has a
reference to "Beta". There is also some residual files on the disk.
The disk is being sent to Will Hobbs for distribution. This should
be (hopefully) the final validation check before the executables are
generated and posted on vhdl.org.
AR - Arpad Muranyi check with Paul Munsey on extra files.
AR - Will Hobbs distribute new parser files to licensees [DONE]
S2IBIS 1.2
A correction/enhansement release has been posted on vhdl.org as S2IBIS12.*.
This version corrects for an incorrect extrapolation problem involving
the [Pullup] table. It also adds several parameters including one which
will allow separate "min" of slow-weak, "typ" or nominal, and "max" or
strong-fast Spice used for these columns.
S2IBIS 2.1
Michael Steer reported on the s2ibis version 2.0 progress through Email.
C. Kumar reported August 24 as the target date. The contents would be
posted on vhdl.org where anyone who wants to review it can get access
to it. This will be a beta version, but this process will avoid attempting
to distribute it privately.
COOKBOOK AND OVERVIEW UPDATE
Bob Ross indicated that Kellee Chrisafulli and Bob received the cleansed
document from Syed Huq of the National Semiconductor cookbook for developing
IBIS models based on measurements.
AR - Syed can send Bob a Framemaker formatted version for conversion to Word.
BIRD27 NEW KEYWORD FOR DIFFERENTIAL I/O
This will be deferred until after the EIA IBIS ballot is completed since
this is a Version 3.0 issue for the future.
AR - Bob Ross submit BIRD27.1 (after EIA IBIS ballot resolution)
BIRD28.1 PACKAGE MODEL EXTENSION / PHYSICAL EXTENSIONS
Steven Peters summarized the issue and indicated that actual length should be
included for each pin. It is up the the simulator companies to process
this information. Stephen still plans to submit a BIRD28.2 revision. Arpad
Muranyi has summitted on the reflector a summary of Raj Mittra's comments,
and Raj Mittra from the University of Illinois, Urbana joined the discussion.
He indicated that the Pads format seems to be favored, but it is not a
standard.
Raj indicated the preference for Spice style syntax by simulator vendors,
particularly for transmission lines. Jon Powell indicated that several
vendors can handle coupled transmission line segments directly. There is a
distinction between transmission lines that exist on well defined ground
planes versus package and bond wire routing.
Raj gave these fundamental sources for package models:
(1) Derivable from measurements (could be a bundle of pins within power/
ground groupings
(2) For EMI modeling tools a PEEC (partial equivalent electrical circuit)
is used as a good approximation using smaller quivalent lumped sections.
(3) S-parameter extraction.
Any model should relate to the above. These processes assume defining
beforehand the ground/power pins and terminating the other (in-between)
pins appropriately to extract the parameters.
This whole issue is subject to more technical discussion in which Raj is
invited to participate.
AR - Stephen Peters submit BIRD28.2 and also supply Raj Mittra directly
with any graphical information for review at rmittra@decwa.ece.uiuc.edu.
AR - Bob Ross add Dr. Mittra to reflector - [Done]
PIN PROGRAMMABLE BUFFER STRENGTHS
Arpad Muranyi submitted BIRD30 proposing a [Multiple Model] keyword.
Discussion will occur on the reflector. One quick comment was that if
the buffers have selections from different power rails (e.g., a 3.3V
buffer and a 5V buffer), there may be some interaction with the [Pin
Mapping] keyword which defines the connectivity of groupings of power
and gnd rails to various buffer models.
TTL DRIVERS
Egg 6 has been started from Jon Powell, but there was no time for discussion.
NEXT MEETING:
It is set on Friday, August 25 1995. Final Ratification of EIA IBIS
response to comments is expected.
==============================================================================
NOTES
IBIS CHAIR: Will Hobbs (503) 264-4369, Fax (503) 264-4210
will_hobbs@ccm.jf.intel.com
Modeling Manager, Intel Corp.
2111 NE 28th M/S JF1-57, Hillsboro, OR 97124 USA
VICE CHAIR: Jon Powell (805) 988-8250, Fax: (805) 988-8259
jonp@qdt.com
1385 Del Norte Rd., Camarillo, CA 93010
SECRETARY: Bob Ross (503) 603-2523, fax (503) 639-3469
bob@icx.com
10220 SW Nimbus Ave, K4, Portland, OR 97223
To become a voting member of the EIA IBIS Open Forum, send email to
ibis-info@vhdl.org for instructions.
If you want to join the e-mail reflector (ibis@vhdl.org), send e-mail to the
IBIS secretary at ibis-request@vhdl.org.
Check the pub/ibis directory on vhdl.org for more information on previous
discussions and results. You can get on via ftp anonymous, "guest" login from
telnet or dial-in (415-335-0110), or send an email request to the automatic
archive server, archive@vhdl.org.
"IBIS Spoken Here" placards are available from Jon Powell (jonp@qdt.com) for
use at trade shows.
==============================================================================
Received on Wed Aug 16 10:33:25 1995
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