DATE: April 2, 1996
SUBJECT: 3/29/96 EIA IBIS Open Forum Minutes
VOTING MEMBERS AND 1996 PARTICIPANTS LIST:
AMP Hank Herrmann*
Cadence Design C. Kumar*
Contec CAE, Ltd. Dileep Divekar, Norio Matsui
Cypress Bruce Wenniger
Hewlett Packard, EEsof Karl Kachigan, Henry Wu
HyperLynx Kellee Crisafulli
INCASES Olaf Rethmeier
Intel Corporation Stephen Peters*, Will Hobbs*, Arpad Muranyi*,
John Keifer, Aaron Tang, Duane Quiet,
Donald Telian, Jim Kruchowski
Interconnectix, Inc. Bob Ross*
Meta-Software (Les Spruiell)
Mitsubushi Tam Cao
Motorola Ahmed Omer*
National Semiconductor Syed Huq*, Donald Snyder, Chune-Sin Yeh
NCR (formerly ATT-GIS) Dave Moxley*, Richard Mellitz
NEC (Hiroshi Matsumoto),
Quad Design Jon Powell, Chris Rokusek*
Quantic Labs (Mike Ventham)
Tanner Research, Inc. (Scott Wedge)
Texas Instruments Roger Cline, Ben Andresen, Sri Jandhyala,
Tareq Shahwan, Dan Phipps
Thomson-CSF/SCTF (Jean LeBrun)
UniCAD Canada Ltd. Celso Faia*
VLSI Technology Dick Ulmer, Sung Oh, Swami Gangadharan,
Daniel Kim, Tom Dockery
Zuken-Redac (John Berrie)
OTHER PARTICIPANTS IN 1996:
Alcatel John Fitzpatrick
Altera Vadim von Brzeski
Apteq Design System Dan FitzPatrick
Compaq Mark Leonard
Digital Equipment Corp. Jeff Chu*
EIA Patti Rusher*
IC Works Eric Chen
Micron Technology Brian Johnson
MicroSim Ralph Perez
North Carolina State U. (Michael Steer)
Oki Semiconductor Tom Chao
Rockwell Collins Thomas Thurman*
S3, Inc. Sarathy Sribhashyam, Phap Duong
Seimans Nixdorf Arnaud Lacariere
Tektronix, Inc. Brock Hannibal
TRW & Free Model Foundation Robert Harrison
Veribest/Integraph Ian Dodd*, David Wiens
Zeelan Technology George Opsahl
In the list above, attendees at the meeting are indicated by *. Principle
members or other active members who have not attended are in parentheses.
Upcoming Meetings: The bridge numbers for future IBIS teleconferences are as
follows:
Date Bridge Number Reservation # Passcode
4/19/96 (916) 356-9200 2-66106 5576848
5/10/96 (916) 356-9200 2-66109 4323275
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
Ahmed Omer of Motorola in Austin, Texas joined primarily as "customer" of
IBIS models. He is in a technology group within a semiconductor division
and is involved in interconnect software issues as related to packages and
boards. He is also interested in more Motorola internal visibility and
involvement with IBIS.
Tom Thurman from Rockwell Collins Avionics and Communications Division joined
us at 9:00 AM. He introduced himself as the author of the ISO STEP AP210
(Electrical System Modeling) standard and a participant in the board layout/
standardization field for many years. He then presented an overview on
Express. This discussion is captured in the technical section below.
EIA MEMBERSHIP AND TREASURER'S REPORT
Patti Rusher reported that Cypress Semiconductor is now a full EIA/IBIS
Member. IBM (Austin) has decided not to renew the EIA membership.
Patti reaffirmed that AMP is a full IBIS member. Jeff Chu of Digital
Equipment and Ian Dodd of Veribest both indicated that they need the
membership information for joining.
No treasurer's report was given.
MINUTES REPORT, MISC.
Bob Ross reported that all AR's have been done, including inviting Tom
Thurman for later discussions.
MISCELLANY/ANNOUNCEMENTS
Patti Rusher reported that EDIF 3 9 9 is undergoing formal letter ballot
review prior to adoption as EDIF 4 0 0. She also mentioned that she was
pleased to see the IBIS Spoken Here signs at the PCB Design Conference.
PRESS AND WEB PAGE UPDATES
In EDN, March 14, 1996, pg. 22 and EDN, March 28, 1996, pg. 87. both have
new EDA tools introduction articles with abundant references to IBIS.
AR - Patti Rusher on behalf of EIA write EDN that contrary to the March 28,
1996 article, IBIS has been formally ratified as an ANSI and EIA standard.
NEW MODELS
Bob Ross reports that VLSI has submitted a directory Michael Steer, although
it has not been posted on vhdl.org yet. As reported last time, the models
will still be available by sending a request to
ibismodel@tempe.vlsi.com
OPENS FOR NEW ISSUES
Proposal for Encouraging more Semiconductor Model development from Syed Huq.
EIA/IBIS 1996 MEMBERSHIP
Bob Ross has sent reminders to members for paying fees. All have responded
including some stating that fees have been paid.
AR - Bob Ross continue working with Patti Rusher to monitor the payment
for official EIA/IBIS Committee Membership.
DAC STANDARDS BOOTH
Patti Rusher stated that six committees will participate the DAC standards
booth including EDIF and IBIS. The IBIS Committee cost will be $2500.
There will be a back lit logo for EIA/IBIS. Because of uniformity in
the booth the Velcro backed Company Logo board may have to be revised.
She will work with Jon Powell concerning details. She can work with the
logos in .gif format. Literature can be made available at the booth.
Patti requested a poster briefly describing IBIS with about 10 bullet
items.
AR - Bob Ross work with Will Hobbs to prepare the list and give to Patti
by Friday, April 5.
Will Hobbs stated that "I Speak IBIS" badges will be provided by Jon Powell
for DAC. One suggestion was "I Like IBIS" which brought memories of an
old presidential campaign.
ANSI/EIA-656 PUBLICATION
Published version of the EIA/IBIS-656 have been mailed to members. The
standard will also available through Global Engineering Documents.
EIA WEB UPDATE
Syed Huq reported that the EIA/IBIS home page has been updated with logo
additions/changes including some new home page links with NCR (from AT&T),
INCASES, Cadence, and Texas Instruments. Information from VLSI has not
been received yet.
Again Syed thanks EIA for their support.
GOLDEN PARSER UPDATE
Arpad Muranyi stated that Paul Munsey will drop off the updated IBISCHK2
parser disks which have 4 corrections documented under /pub/ibis/bugs
on vhdl.org. Paul Munsey is to send the bill to EIA which we assume
will be nominal. While the changes involved corrections and one very
minor enhancement, ample review time has passed that we feel appropriate
to provide reasonable compensation for such updates which involve
enhancements since expenses are involved even for minor changes. This
will be Version 2.1.11.
AR - Bob Ross provide Will Hobbs a list of Version 2 Parser owners to
check his list. - [Done]
Will Hobbs will distribute the Parser.
Jon Powell will need to create new executables, and Bob Ross will then
put them on vhdl.org.
SPICE TO IBIS VERSION 1.3
Bob Ross indicates that Steve Lipa has prepared a correction s2ibis
Version 1.3 to be put on vhdl.org. Either Michael Steer will post it,
or Bob Ross will post it if Michael is unavailable.
The correction fixes a double counting problem in the [Pullup] table
clamping region.
SPICE TO IBIS VERSION 2.1
Bob Ross reported that the author at North Carolina State University Alan
Glaser is studying for Ph.D. qualification exams and will be available for
work after that in say a month.
While problems have been reported directly, a list needs to be generated
for visibility of what problems exist.
Bob indicated that some "crashes" have been sent directly. Also there
are some enhancements required consistent with the s2ibis version 1.3
coded that would differentiate an input voltage signal values and
input threshold values. Currently [Vinl] and [Vinh] commands set both
in s2ibis Beta Version 2.091, and this is wrong.
AR - Bob Ross will prepare a list as soon as possible of s2ibis version
2.091 bugs.
PLAN TO ENCOURAGE SEMICONDUCTOR MODELS
Syed proposed a Most Models for the Year Reward to encourage publicly
available IBIS Models to be given at DAC. Questions concerned whether
those under NDA and those available through e-mail to the corporations
that are free could be included. The award would be given at DAC
where the participants would be available for presentation of the
award. An awards committee might opt at this time anyone who is putting
models on vhdl.org or in a publicly accessible Web site.
Arpad Muranyi was concerned that small glue logic models might inflate
the numbers versus larger pin count processor models. Bob Ross
suggested that perhaps the focus of the award would be to the company
rather than the individual to encourage and acknowledge company commitment.
AR - Bob Ross put this as an agenda item for the April, 1996 meeting,
and also plan that the award should be resolved by the May, 1996 meeting.
Patti Rusher can help prepare the rewards.
PRIORITIES FOR 1996
Will Hobbs reported the priorities that were established by a committee
within Intel that relate to IBIS changes. They consist of
Diode Kickback
Feedback
Sequential Drivers
Voltage and Temperature parameterization
Cookbook Update, particularly on DC versus AC impedance
Improved Packaging
Package Parasitics
IBIS Models production (Intel has many IBIS model as a result of making
it a procurement requirement)
Ground Bounce/SSO/Scaling of Drivers/Multiple Outputs related Issues
Will indicated that this list initiated by the Platform Architecture Lab
closely resembled the IBIS committee priorities.
TUTORIAL
Patti Rusher stated that EDIF World was planning a tutorial in Monterey,
California later this year and wondered if IBIS would also be interested
in presenting a tutorial.
EXPRESS
Tom Thurman, from a Rockwell Collins Division in Cedar Rapids, Iowa has been
involved with standards activities including information and data modeling.
One piece of this work is Express. The Express format has been adopted
internationally and nationally by EIA, EDIF and CFI. It is a more precise
representation than English. Tom's feedback on fast tracking the IBIS
proposal is that it should have an Express representation for better, more
thorough review.
The goals of the Express representation are 1) to make the language easy to
understand, and 2) to design a language that can be interpreted and processed
by a computer. There exists a graphical form called Express-G which helps
newcomers become familiar with a new specification more easily. It is easy
to create a lexical form from a graphical form and visa-versa.
Once the Express representation is in place, it is easy to expand the scope
of the specification and to show its interaction with other specifications.
This helps attain the goal of cohesive standards.
Express has the concept of base types (reals, integers, logicals), but is not
concerned with specific computer implementations such as 32 bits, 64 bits,
etc. It is similar to object orientated languages. In EDIF, there is a
separate section for syntax guidance. The Express entity is similar to a
C++ class, e.g., each having analogous attributes.
Express-G shows relationships with boxes and lines. It provides a conceptual
data model. It is a static data modeling language. Process and evens are not
currently included. The relationships are object to object. Express lends
itself to modular decomposition.
In response to questions by Stephen Peters, Will Hobbs, Ian Dodd, C. Kumar,
and others, Tom described Express as not a BNF or syntax description, but one
that describes relationships. It was initially aimed at describing industrial
data. He estimates 400-500 users in industry and academia including being
taught at Clemson and UCLA. It has been adopted as the representation of
EDIF 4 0 0. Express is still suitable for the non-syntactical aspects of
IBIS and would not undermine the widespread acceptance of the current IBIS
syntax. It provides the structure of the model and the rules and behavior
of the data. Some constraints could also be included. The golden parser
itself could be described using Express. Express provides an unambiguous
description and also provides a method of communicating with parallel
standards.
Since Express is used as a representation in EDIF 4 0 0, Patti Rusher was
asked to provide a simple illustrative example.
AR - Patti Rusher post a simple example of Express representation.
Tom concluded that Express can be used to describe physical files and that
IBIS did not appear to require a large data model.
BIRD33 (EGG8) - PHYSICAL PACKAGE DISCUSSION
Stephen Peters recounted the separate committee meetings. The members consist
of Stephen, C. Kumar, Ian Dodd, David Wiens, Jon Powell, Kellee Crisafulli,
Olaf Rethmeier, and Werner Rissiek. The 19 March meeting established the
goals that the proposal be human readable, easily parseable, handle SIMMs,
resistors and capacitors, and polygons. They converged on the conclusion
that the specification should be an existing standard, if possible, and
may be a subset. The proposed EDIF 4 0 0 appears to be a good candidate.
They are looking into CAD vendors to see who is supporting EDIF 4 0 0. The
physical specification would be most useful for SIMMs and MCMs.
The electrical side has similar goals. They considered Kumar's Spice-like
description, an extension to BIRD28.3 which considers named matrices and
eliminates [Number of Sections], and another description presented by
Jon Powell based on Quad Design's experiences. The electrical specification
would be most useful for PGAs. The next meeting is scheduled on April 4,
1996.
Hank Herrmann wants to join the subcommittee.
BIRD31.1 - MATED MODELS
Bob Ross discussed the key points of BIRD31.1. The mated model (a generic
term covering connectors, cables and sockets having two terminals) is blended
into the package model with BIRD28.3 extensions and will track any changes
resulting from future package proposals. It differs in that it introduces
optional Cpad_1 and Cpad_2 default capacitor subparameters since most
connector model information does not assume a pad capacitance. It will
have two columns of pin numbers instead of one in the package model to allow
different naming conventions on each side and to allow simple cable crossover.
Finally, it is always in a separate .mmf and would not be in a .ibs file
since it would be difficult to track having the same model in several .ibs
files.
BIRD34.1 (EGG9) - HANDLING STORED CHARGE
Not covered.
EGG10 - PARSER ADDITIONS FOR NUMERICAL CHECKING
Not covered.
NEXT MEETING:
The next telephone meeting is set for Friday, April 19, 1996.
==============================================================================
NOTES
IBIS CHAIR: Will Hobbs (503) 264-4369, Fax (503) 264-4210
will_hobbs@ccm.jf.intel.com
Server Chipset System Validation 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
Transmission-Line Products Manager, Quad Design
1385 Del Norte Rd., Camarillo, CA 93010
SECRETARY: Bob Ross (503) 603-2523, fax (503) 639-3469
bob@icx.com
Modeling Engineer, Interconnectix, Inc.
10220 SW Nimbus Ave, K4, Portland, OR 97223
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.
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.
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:
http://www.eia.org/eig/ibis/ibis.htm
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 e-mail 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 Tue Apr 2 16:18:07 1996
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