DATE: July 23, 1996
SUBJECT: 7/19/96 EIA IBIS Open Forum Minutes
VOTING MEMBERS AND 1996 PARTICIPANTS LIST:
AMP Hank Herrmann*, Tim Minnick*, Russ Moser
Cadence Design C. Kumar
Contec CAE, Ltd. Dileep Divekar*, Norio Matsui, Antonis Orphanou
Cypress Bruce Wenniger
Hewlett Packard, EEsof Karl Kachigan, Henry Wu
HyperLynx Kellee Crisafulli
INCASES Olaf Rethmeier, Ralf Bruening
Intel Corporation Stephen Peters*, Will Hobbs, Arpad Muranyi*,
John Keifer, Aaron Tang, Duane Quiet,
[Donald Telian], Jim Kruchowski
Interconnectix, Inc. Bob Ross*, Chris Reid
Meta-Software (Sanjay Gangal)
Mitsubushi Tam Cao, Hoang Nguyen
Motorola Ahmed Omer*
National Semiconductor Syed Huq*, Donald Snyder, Chune-Sin Yeh,
Bill Aronson
NCR (formerly ATT-GIS) Dave Moxley*, Richard Mellitz
NEC (Hiroshi Matsumoto),
Quad Design Jon Powell*, Chris Rokusek
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, D.C. Sessions*,
Hrish Patel*
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
Molex Gus Panella
North Carolina State U. (Michael Steer)
Oki Semiconductor Tom Chao
Philips Semiconductor Mike Magdaluyo
Rockwell Collins Thomas Thurman
S3, Inc. Sarathy Sribhashyam, Phap Duong
Seimans Nixdorf Arnaud Lacariere
Symmetry Andy Hughes
Tektronix, Inc. Brock Hannibal
TRW & Free Model Foundation Robert Harrison
Veribest Ian Dodd, David Wiens
VTC, Inc. Bob Ward
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.
Participants who have joined another organization are in square brackets.
Upcoming Meetings: The bridge numbers for future IBIS teleconferences are as
follows:
Date Bridge Number Reservation # Passcode
8/16/96 (916) 356-9200 2-88344 6838524
9/6/96 (916) 356-9200 2-88345 4511183
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
Hrish Patel joined for the first time from VLSI Technology to become familiar
with IBIS, since he will be working on IBIS models.
EIA MEMBERSHIP AND TREASURER'S REPORT
Patti Rusher's June 30, 1996 report shows $10,468. Several thousand dollars
of DAC meeting and other item expenses are expected to show up in the July
31, 1996 report. Invoices are still being tracked for DEC and Veribest
memberships.
MINUTES REPORT, MISC.
No change. All AR's have been dealt with.
MISCELLANY/ANNOUNCEMENTS
Jon Powell has agreed to handle the system administrative aspect of the
IBIS vhdl.org account (Membership additions, deletions, response to
problems, questions, and posting material) while Bob Ross is on vacation
August 1 through August 13.
PRESS AND WEB PAGE UPDATES
Syed Huq plans to add links in the EIA/IBIS home page to public IBIS model
databases that Jon Powell provided. Jon has checked this out and they
appear good. (Patti Rusher reports over 2500 hits on the EIA/IBIS home
page.)
AR - Syed Huq activate links to Jon Powell's page from EIA/IBIS Home page.
Jon Powell has requested that anyone who knows of additional IBIS models
available on Web sites to forward information to him.
(Late news - Brian Johnson of Micron Technology reports that Micron models
are available on http://www.micron.com/cgi-bin/model. A one-time registration
is required; no password or username is needed.)
NEW MODELS
The new 200 MHz PentiumPro model files have been put in the Intel directory,
replacing the previous models.
Jon Powell reports receiving a pending Intel directory update from Michael
Steer. Jon will work with Arpad on current contents. Anyone else who
has updated information should work with Jon.
OPENS FOR NEW ISSUES
Stephen Peters - Prague Conference Report
Bob Ross - Secretary Position
Bob Ross - Specification Enhancements Discussion
IEC EXPRESS FUNDING PROGRESS
Patti Rusher reports further progress in helping fund an IBIS Express model
needed for IEC progress. DARPA funding should go to US organizations.
EIA itself cannot accept funding, but an auxiliary corporation "EIA Server
Corporation" may be able to accept and distribute money. Patti needs to
gather all of the standards funding requests including items from DIE into
one comprehensive proposal. She plans to draft a proposal next week for legal
review.
EE TIMES ARTICLE
EE Times has requested through Patti Rusher an IBIS article for the Sept. 2
issue signal-integrity special report. Bob Ross, Jon Powell and Syed Huq
are working on the article. The article will be basic, but will provide more
emphasis on IBIS model sources and utilities than in other overview articles.
SECRETARY
Bob Ross followed up on the need for the IBIS Secretary position to be
filled. Stephen Peters suggested that the duties by split up. Bob stated
that the primary need is still to produce the minutes. Several people
already help out taking notes. Bob will handle this aspect of the Secretary
position until someone else volunteers.
PRAGUE CONFERENCE
Stephen Peters and Will Hobbs attended a European CAD Standards Conference
from July 6 - 12, 1996. They presented "Applying Standards to Increase
Model Availability - Two Case Studies, IBIS and OMF". They took the model
supplier point of view. HDL, AVHDL, Vital and OMF generated the most
interest.
They also had a opportunity to discuss Express funding with Hilary Kahn.
The cost estimates remain the same.
EDIF REVIEW
Bob Ross reports he is working with Alan Williams of the University of
Manchester concerning reporting passive R, L, C element values to simulators,
per the IBIS Committee technical comment.
BIRD34.1 - STORED CHARGE EFFECT
Bob Ross summarized the primary assumptions that the proposed transit time
format is similar to the Spice TT diode parameter and that the clamping
diodes produce the major effect in the clamping regions. D.C. Sessions
stated that many clamping diodes are MOS, not bipolar. He is investigating
the significance of this difference. So the voltage dependent capacitor
may be appropriate to support all technologies. Further discussion is
expected on BIRD34.1.
AR - Anyone with information on stored charge effects in MOS devices provide
it to D.C. Sessions.
BIRD35.1 - MULTI-STAGED OUTPUTS
Bob Ross summarized the [Rising Sequence] and [Falling Sequence] tables.
Jon Powell reviewed the revised syntax and suggests further simplification
based on calling stages by Model name. This avoids introducing the numbered
table extensions in Bob's proposal. One concern is to truly isolate those
subparameters which apply for the combined model, versus those that apply
to the individual stage. The "master driver" could still be used to
capture all models and parameters and sequencing in one area to avoid
scattering the information throughout a .ibs file.
Stephen Peters suggested a composite [Rising Waveform] and [Falling Waveform]
be provided. Jon stated, that if this were done, it would be for checking
only since it contains less information than the detail needed by individual
stages.
AR - Bob Ross work with Jon Powell concerning syntax changes and produce
BIRD35.2.
BIRD36 - ELECTRICAL BOARD DESCRIPTION
Since Stephen Peters had just returned, discussion on this was deferred.
Bob Ross commented that he had talked with and agreed with Hank Herrmann
on most of the points that Hank had raised. One point of disagreement
regarded putting an actual (large) size limit on the number of external
pins.
BIRD37 - ENHANCEMENT OT THE PACKAGE MODEL SPECIFICATION
Bob Ross asked whether it was ready for vote. Jon Powell suggested that
votes on BIRDs be announced in the agenda since there are a number of
technical issues to review.
Bob wanted to check that new FORK term did not use the "/" terminator,
reserved only for the "Len .... /" syntax. Hank Herrmann suggested the NC
addition. However, same functionality is provided using "Len = 0 /" null
element. Bob suggested that BIRD37 include the approved BIRD28.3 example
and add the FORK subparameter to fully illustrate the syntax extension.
AR - Stephen Peters provide an upgraded BIRD37.1 which addresses these
concerns for vote at the next meeting.
BIRD38 (EGG11) - ABSOLUTE MAXIMUM VOLTAGE
Jon Fitzpatrick was not present, so discussion was deferred. Bob Ross
felt that this is a very complex specification BIRD needing further discussion.
The extensions would definitely be optional.
EGG10 - PARSER ADDITIONS FOR NUMERICAL CHECKING
Bob Ross acknowledged getting the statistical data from Chris Rokusek concerning
IBIS parameters on models stored on vhdl.org. Chris now needs to examine
this and provide proposed values for the parser tests 1-5.
AR - Chris Rokusek propose tests and test limit values.
Stephen Peters asked whether these tests would be for Version 3.0. Bob
indicated that this has not been decided. They could also be an upgrade
to ibischk2. Some comparison tests should be very easy. Others such as
those that test compatibility of V/T table voltages with V/I tables could
require computational work.
SERIES RESISTOR
Arpad Muranyi discussed further the series element ideas. It could be a
controlled 3-terminal device with a set of tables, similar to transistor
device characterizations. One of the major needs is for "Quick Switch" (e.g.,
CBT technology from Texas Instruments) devices which can connect or disconnect
paths. The MOS on path may be 1 to 10 ohms, but there may be additional
analog characteristics. Current electrical simulators do not include digital
control logic, so Jon Powell felt the focus should be more on 2-terminal
series elements with, perhaps, a 3.3 V and 5 V mode. Series elements can
include diodes, resistors, EMI filters, etc. So, some form of I/V tables may
still be needed. The devices could also be modeled with an off and an on
state. Currently there is no IBIS support in this area. The only EDA vendor
support uses their own syntax. While the Electrical Board Extensions could be
used, a direct, simpler method is more appropriate.
AR - Arpad Muranyi provide a proposal in order to continue this as an agenda
item.
SPECIFICATION PARAMETER ENHANCEMENTS
Bob Ross indicated that BIRD38 dealt with Specification data similar to
Vinh and Vinl and not electrical characterization data. There have been
a number of requests for specification parameters, and such extensions
are on the priority list for Version 3.0. Bob asked for ideas.
Ahmed Omer stated that an input delta-time limit is needed for the input
thresholds to assure maximum energy limits are not exceeded.
AR - Ahmed Omer make a proposal for dealing with these energy limit.
Bob added hystersis thresholds, CMOS style input thresholds that are a
percentage of Vcc, and overshoot (high and low) limits are possible
additions.
On both the input and output sides, the reference points for signal
integrity and timing measurements can be at the DIE or at the PAD for
different applications. Also, timing references may be at the PAD, but
signal integrity references may be at the DIE for standard devices, but
at the PAD for ASICs.
Jon Powell suggested that a committee similar to the package committee
be formed off-line to collect the parameters. Bob Ross plans to initiate
a proposal.
NEXT MEETING:
The next meeting is on Friday, August 16, 1996, 8:00 A.M. to 9:55 A.M., four
weeks from now because of some conflicting commitments. BIRD37.1 is
scheduled for vote.
==============================================================================
NOTES
IBIS CHAIR: Bob Ross (503) 603-2523, Fax (503) 639-3469
bob@icx.com
Modeling Engineer, Interconnectix, Inc.
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
LIBRARIAN: 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: Vacant
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==============================================================================
Received on Tue Jul 23 08:42:52 1996
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