DATE: March 12, 1996
SUBJECT: 3/8/96 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
Hewlett Packard, EEsof Karl Kachigan, Henry Wu
HyperLynx Kellee Crisafulli*
IBM (Jay Diepenbrock)
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 (Ron Werner)
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
Cypress Bruce Wenniger
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*
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
3/29/96 (916) 356-9200 1-55737 1119667
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
Tom Chao of Oki Semiconductor introduced himself and indicated that Oki
will be making IBIS models for their ASICs.
EIA MEMBERSHIP AND TREASURER'S REPORT
Hank Herrmann reported that AMP is now a full IBIS member.
No treasurer's report was available.
MINUTES REPORT, MISC.
Jim Kruchowski first name correction in m012969.txt and m021696.txt minutes.
MISCELLANY/ANNOUNCEMENTS
A simple IBIS default home page now exists on
which is intended to be accessed by the top level vhdl.org. It consists
of some background information and a link to the IBIS directories, the
official EIA/IBIS home page, and the RAIL directories.
Bob Ross would like electronic copies of the Face to Face meeting slides
sent to him for putting on vhdl.org.
PRESS AND WEB PAGE UPDATES
In EDN, March 1, 1996, pg. 50, winibis by Hyperlynx is mentioned.
In EE Times, February 26, 1996. pg. 88, IBIS is mentioned in a Quad Design
introduction writeup.
NEW MODELS
Sung Oh reports that VLSI now has dozens of IBIS models available. To get
a list, e-mail
ibismodel@tempe.vlsi.com
Syed Huq suggested that Sung also provide a list of available models on
vhdl.org. He can contact Michael Steer to have it set up.
OPENS FOR NEW ISSUES
None
EIA/IBIS 1996 MEMBERSHIP
AR - Bob Ross find from Patti Rusher who now are official EIA/IBIS members
for 1996. Dave Moxley of NCR and Dileep Divekar of Contec Microelectronics
still report not receiving the revised invoice or FAX.
DAC STANDARDS BOOTH
Jon Powell proposed all official member companies generate their own logo
art on 8.5 inch by 11 inch paper with Velcro backing to stick on a poster
wall. All members can put this in an array around a central IBIS logo
and add any message such as "see us at booth 435". Jon says that you
can just print the artwork using a color printer and take it to a print
shop and have them mount the artwork on a poster board with Velcro backing.
Alternatively, Jon can make the posters from the existing supplied logos.
He can still do so for those who request it. However, the preference is
for each company to make their own posters.
AR - Everyone making posters for DAC please send them to Jon Powell prior to
DAC.
Bob Ross suggested that non-EIA/IBIS members who are producing IBIS models
would also be permitted to have a poster displayed.
Will Hobbs suggested "I Speak IBIS" badges. Jon Powell will look into this.
This seemed like a very good idea and Jon thinks it will be easy to do.
ANSI/EIA-656 INTERNATIONAL RATIFICATION
Patti Rusher has received a response request regarding pending IBIS
International ratification. The request was to put IBIS into an Express-G
format. This appears to be a defacto requirement for EDA standards, such
as EDIF 4 0 0. The Express format produces graphical relationships and
produces a self consistent document from which a parser can easily be
developed.
It is still not known what the total impact is. We appear to have three
options:
Push of International Standardization based on its defacto acceptance and
broad support without an Express representation.
Attempt to do an Express representation through any number of resources
including interested members, university project, and ARPA funding of a
contractor.
Withdraw the request for international standardization.
We are still trying to understand the impact and scope, since the committee
representatives are not familiar with Express.
AR - Bob Ross invite the commentors to the next IBIS meeting for their
direct knowledge and input on the issue.
AR - Bob Ross and Will Hobbs will post the comments related to Express-G
on the reflector so we can get other opinions.
ANSI/EIA-656 PUBLICATION
No further status was available. The standard is planned to be available
through Global Engineering Documents.
IBIS ROSTER UPDATE
Bob Ross reported that the 1996 roster is on vhdl.org. It contains all of
the official member companies plus the other companies that have responded.
Others who have not responded have been removed. The roster will continue
to be updated as new responses come in. The old roster is archived.
EIA WEB UPDATE
Syed Huq reported that the EIA/IBIS home page counters are now working on
all pages. He has also added revision numbers to all pages. He has
been receiving logo updates and new logos from Cadence, Incases, TI, NCR,
Mentor Graphics. VLSI logo has not been received by Jon Powell, and Sung
Oh will look into this. Currently Mentor is not a member company so their
logo would not be permitted. Once the updates are made (including) some
new home page links, Syed will announce the Home page. Syed thanks EIA
for their support.
Syed would also like to put a model tools section to reference s2ibis
and s2iplt, winibis, the cookbook and the parsers. The committee endorsed
this expansion.
GOLDEN PARSER UPDATE
Bob Ross formally submitted the three bugs through the newly established
parser reporting system before we issue a parser correction. A bug
directory exists, and a BUG form is available there. These old bugs
consist of multiple disclaimers, missing legal suffixes in package
model matrix data, and failure to detect a minor subparameter syntax
error under [Model]. The first and third error does not exist in the
original ibis_chk utility. In addition, we would like to see the
parser version number printed so people know which parser is being used
(e.g., Version 2.1.10)
Unfortunately, there is no formal validation suite. However, the fixes
should be minor and are important for Specification compliance. Additions
to the parser as proposed in EGG10 (later) will not be included.
AR - Bob Ross contact Paul Munsey about the time/cost of the fixes.
SPICE TO IBIS VERSION 1.2, 2.1
AR - Bob Ross will seek further information regarding the status of the
project.
Several bugs have been submitted from various sources, but they are not on
a formal list. Also Bob reported a VERSION 1.2 bug regarding handling
of the Pullup Table in the Clamping region - a double counting of the
clamping current.
It was suggested that the bug tracking system be expanded to include
s2ibis bugs. Subdirectories for each utility can be established. The
general e-mail address for submittal can be changed to ibis-bug@vhdl.org.
PRIORITIES FOR 1996
Will Hobbs deferred further discussion of priorities for 1996. Instead,
he presented the list of priorities from the last meeting.
The tabulated list is shown:
validation (post 4 or 5 reality checks and add to parser)
extended package models (electrical and physical)
diodes
connectors
staggered turn-on buffers
feedback
scaling
better handling of SSO
clarification of worst case and best case corners
specification parameters (hysteresis, overshoot, etc.)
cookbook (may contain validation and corners)
new overview
more models ...
BIRD33 (EGG8) - PHYSICAL PACKAGE DISCUSSION
Olaf Rethmeier indicated that computer problems have been fixed and the
SULTAN proposal was available for downloading. Bob Ross also put copies
on vhdl.org under /pub/ibis/sultan. His version did not print, however.
(The problem was discovered later to the size A4 statement in line
750 which can be deleted.)
The major discussion centered around Kellee Crisafulli's proposal and also
on the fact that there are several other existing proposals. Kellee's
proposal is expected to be simpler than SULTAN, EDIF, etc., and is intended
to be user easier to use. C. Kumar suggested that an IBIS subset of EDIF
could meet the needs - if it were possible to generate. Ian Dodd had a
question on whether EDIF required a royalty payment. Further discussion
concerned the completeness of Kellee's proposal since it does not include
arbitrary shaped or meshed planes. Stephen Peters questioned what were
the limitations.
AR - Kellee Crisafulli contact Patti Rusher concerning royalties on EDIF
and also on the availability of EDIF 4 0 0 itself.
[Done - not required, and Patti will make it available.]
Will Hobbs proposed a subgroup to get the physical package discussion off
center. Such a group was formed and consists of Stephen Peters, C. Kumar,
Olaf Rethmeier, Jon Powell, Ian Dodd, and Kellee Crisafulli. The first
meeting will be Friday, March 15, 1996, and Stephen will set up the
conference call. After some discussion, the groups focus will be to address
the physical representation first. Some eventual choices may be to propose
BIRD33, to propose an existing representation such as SULTAN or EDIF, or to
propose a subset of an existing representation. It will report back at the
next meeting. The group can also address the electrical description problem,
but it's priority is to deal with the physical description issue first.
BIRD31 - CONNECTOR MODELS
No report. Bob Ross plans to issue BIRD31.1
BIRD32 PACKAGE MODEL ENHANCEMENT
No update from Stephen Peters. C. Kumar is still interested in a Spice-
like description. However, Jon Powell proposed a proven Quad Design
structure also be considered. His concern continues to be properly
describing the inductive coupling polarity of package models. This
discussion can be carried by the Physical package subcommittee.
BIRD34 (EGG9) - HANDLING STORED CHARGE
Bob Ross described BIRD34 as an extension of the old EGG9 proposal. It
also includes the assumed formulas and a TT extraction method description
which produces the effective value. The method is intended to mimic a
real signal. The description was very unclear to Stephen Peters, so
it needs to be redone and clarified. Jon Powell has experimental support
for modeling TT as long as the series resistance is not too large. He has
used C vs. V tables to produce good correlation.
EGG10 - PARSER ADDITIONS FOR NUMERICAL CHECKING
In the brief time remaining, this topic was introduced. Bob Ross indicated
that the first proposal concerning monotonicity checks was not clear since
there are both Warning and Error checks already in ibischk2 as a result of
extensive past discussions. It is not clear whether the request was for
some new capability. Bob also indicated that Stephen Peter's addition
to give warning of such parameters as C_comp, C_pkg, etc., should be based
on actual values, not the existence of suffixes, since numerical values
can be extracted (such as with the monotonocity tests).
NEXT MEETING:
The next telephone meeting is set for Friday, March 29, 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
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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 Mar 12 17:20:54 1996
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