DATE: June 2, 1997
SUBJECT: 5/30/97 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
Cypress Bruce Wenniger
Digital Equipment Corp. Jeff Chu
Hewlett Packard, EEsof Karl Kachigan, Henry Wu
High Design Technology (Razvan Ene)
HyperLynx Kellee Crisafulli
INCASES Olaf Rethmeier*
Intel Corporation Stephen Peters*, Arpad Muranyi, Henry Maramis
Interconnectix Bob Ross*
Mitsubushi Tam Cao
Motorola Ahmed Omer
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
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
Zuken-Redac (John Berrie)
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
EIA Patti Rusher*
EMC Fabrizio Zanella
Micron Technology Brian Johnson
Molex Gus Panella
North Carolina State U. (Michael Steer)
S3, Inc. Porsh Shih, Sarathy Sribhashyam
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
6/12/97 IBIS SUMMIT at Anaheim, CA - No Telephone Bridge
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
No new participants.
MEMBERSHIP UPDATE AND TREASURER'S REPORT
Patti Rusher will provide a full report by next meeting. Several companies
will be billed again. UniCAD is now moved to the Cadence line as a result
of a recent merger with CCT.
REVIEW OF MINUTES AND AR'S
No corrections.
MISCELLANY/ANNOUNCEMENTS
None.
PRESS AND WEB PAGE UPDATES
Bob Ross reported that Dr. Howard Johnson gave liberal references to IBIS
in his Straight Talk for Serious Digital Designers column "Planning
for Signal Integrity" in Electronic Design, May 12, 1997, pp. 135-136.
Bob also reported an article "AMP Offers EDA Software" in Electronic
Engineering Times, May 19, 1997, pp. 56-57 which mentions an IBIS-to AmpSpice
converter.
NEW MODELS AVAILABLE, LIBRARY UPDATE
Bob Ross reported that Integrated Device Technology IBIS models are now
downloadable at:
http://www.idt.com/cross_pl/models.
Under DOWNLOADABLE MODELS, hit search, and select Model Type "IBIS".
AR - Jon Powell add this link to the EIA/IBIS Web site Model list.
OPENS FOR NEW ISSUES
Bob Ross - BIRD43
Bob Ross - BIRD31.3 and BIRD32 close-out
DESIGN AUTOMATION CONFERENCE (DAC) 1997 IBIS MEETING PLANNING
Syed Huq reported on the planned agenda for the EIA/IBIS Summit meeting on
Thursday, June 12, 1997 in Anaheim, California at the Marriott Hotel. This
will be next door to the Convention Center. The agenda will be posted after
the meeting, pending resolution of some BIRDs.
Patti Rusher has reserved Suite 312, and this will also be noted in the lobby
as an EIA/IBIS meeting. She plans for 25 people with a continental breakfast
starting at 8:30 A.M. Lunch will also be provided. An overhead projector,
screen, podium, and flip chart will be available. Syed requested that Patti
bring blank foils and color markers for overheads.
Syed requests that presenters bring 25 copies of their presentations to the
meeting to distribute. This will save on logistics to copy the presentations.
Bob Ross mentioned that there is no teleconferencing for this meeting since
the expense is very high.
AR - Syed Huq send out the Meeting Agenda [Done].
INTERNATIONAL PROGRESS
Patti Rusher reported on a USTAG group meeting which voted to approve a new
work item proposal "IBIS Models and EMC Simulation" from France. This
is for IEC TC93, and the proposal is referenced as 93/60/NP. Bob Ross
is listed as the US contact and will be copied on all activity. Bob stated
that US EDA vendors are interested in the proposal, so the Committee may
want to become actively be involved.
Patti stated that IBIS Version 2.1 is a separate approved new work item
proposal 93/46/NP.
Bob reported that Japanese EIAJ activity will be one of the IBIS Summit
presentations. This should give us an update on the I/O Interface Model for
Integrated Circuits proposal.
IBISCHK2+ REPORT
Bob Ross reported that Chris Rokusek has fixed a problem where some [Rising
Waveform] and [Falling Waveform] tables were not fully tested for correct
starting and ending values for Open_* Models. Bob has put an updated version
of ibischk2+ on vhdl.org under /pub/ibis/ibschk2+ for downloading. Bob
recommends this version as the utility to use for checking because it helps
detect situations where the time window may not have been long enough for
waveform table generation.
IBIS COOKBOOK PROGRESS
Stephen Peters has set some time to work on the Cookbook for IBIS Version 2.1.
It will also reference a few IBIS Version 3.0 features. Stephen will have
copies available at the IBIS Summit meeting for review. This copy is public
and it has expanded and updated sections. It also has answered many of the
IBIS reflector questions. Stephen has not included the preferred vendor test
loads, nor has he included a section on measurement techniques.
S2IBIS2 ISSUES AND NT
Bob Ross has posted an interim fix for a s2ibis2 resolution problem. The fix
has columns printed with four decimal digits. Bob also noted continued
IBIS reflector questions, and there may be some other bugs lurking in regions
that have not been exercised thoroughly, such as ECL model processing.
BIRD41.6 - MODELING SERIES SWITCHABLE DEVICES
Bob Ross reported that he sent out a PSpice netlist to test the approach to
model series switches. BIRD41.6 has gone through successive modifications
to and now includes a change so the [Model Selector] keyword also applies to
Series and Series_switch models.
(Dave Moxley indicated before the meeting started that he uses series switches
for 5 V to 3.3 V interface applications. He currently needs to use discrete
series elements as an approximation.)
Stephen Peters asked if BIRD41.6 includes the series resistor element, and
Bob reported that it did in a manner that should be compatible with BIRD36.3.
Bob has found a few editorial mistakes and plans to issue a correction
BIRD41.7. John Fitzpatrick commented at the end of the meeting that he
agreed with the work in BIRD41.6.
AR - Bob Ross issue BIRD41.7 with corrections [Done].
BIRD42.1 - MODELING CURRENT WAVEFORMS
Kumar agreed with the implementation that the [GND Current] and [POWER
Current] tables be positioned under the [Rising Waveform] and [Falling
Waveforml tables. Bob Ross also has also added to the [Rising Waveform]
Waveform] sections some suggested practices concerning what subparameters
should not be used, if possible, to produce the best models for simulation.
He also changed the examples so that they represented better fixture loads.
The Waveform tables are derived from the same Spice model used for generating
the [GND Current] and [Power Current] tables. Stephen Peters commented
that the new Waveform tables contain some non-monotonic points at the
beginning and wondered if this would be a problem with simulators. Bob
and Kumar responded that this would not be a problem for some simulators,
but if it is, the simulators can filter the data. IBIS should capture the
actual data.
Kumar commented that the C_comp de-embedding mathematics can contribute to
numerical problems - getting the C_comp current from the derivative of voltage
across C_comp. A note should be put in to warn about this.
Stephen Peters asked if BIRD42.1 is intended for a more accurate model
or for SSO bounce problems, and Kumar responded that it is for both. The
current distribution information is needed for more accurate representation
in large ASICs with, say 1000, pins, and is also information for SSO. The
current tables can help in interpolation and fitting the response to the
existing loads.
AR - Bob Ross issue BIRD41.2 with a C_comp note [Done].
BIRD43 - COMPONENT TEST POINT SUBPARAMETERS
Bob Ross introduced BIRD43 which adds two subparameters to [Component] in
a manner similar to Polarity and Enable for [Model]. The Si_location and
Timing_location subparameters give the location of the SI or Timing test
points. The choices are Die or Pin. The default (without subparameters)
is the Pin. Some ASICs, however, give specifications at the Die.
BIRD31.3 - MATED MODELS
In preparation for Version 3.0 ratification, Bob Ross wanted to close out some
dormant BIRDs. BIRD31.3 was issued May, 1996. Any new mated model proposal
should be made relative to IBIS Version 3.0. Since it would likely be
proposed as a separate file, work on it can proceed in an independent manner
from IBIS Version 3.0.
BIRD31.3 was rejected unanimously.
BIRD32 - ADDITIONAL ENHANCEMENT TO THE PACKAGE MODEL (.pkg FILE)
Bob Ross proposed that BIRD32 issued January, 1996 also be closed out, and
C. Kumar agreed. A new proposal could be generated relative to IBIS Version
3.0 to advance the package syntax for coupled sections.
BIRD32 was rejected unanimously.
CONNECTOR MODELING
Bob Ross suggested that this discussion be dropped until new proposals are
presented.
MODELING EARLY CLAMPS IN IBIS
Stephen Peters reported that a proposal will be issued, when needed.
VERSION 3.0 RATIFICATION
In preparation for the EIA/IBIS Summit, Bob Ross plans an updated Work in
Progress pending Version 3.0 of IBIS stored on vhdl.org under /pub/ibis/wip.
This version will include the changes in pending BIRDs 41.7, 42.2 and 43.
Bob will also plan a cleaned up pending IBIS Version 3.0 that does not
contain the internal references to the BIRDs. Bob will also make some minor
editorial changes the document. One change, for example, would be to simply
the BIRD30.2 [Model Selector] to use more readable model names.
Because of the anticipated size of these documents, Bob does not plan to
mail them out on the IBIS reflector. They will be available from a browser
or by FTP. However, Bob will mail a copy to anyone who requests one. Also,
IBIS members who cannot attend the EIA/IBIS Summit may submit votes on the
pending BIRDs and on ratification of EIA/IBIS Version 3.0 by mail to Bob Ross
(address below).
AR - Bob Ross put in the IBIS wip directory the final updated pending IBIS
Version 3.0 which shows the BIRD changes, and of a cleaned up Version of
pending IBIS Version 3.0 without the references to BIRDs [Done].
NEXT MEETING:
The next meeting is a Face-to-face IBIS Summit Meeting on Thursday, June 12,
1997, 8:30 A.M. to 5:00 P.M. at the Design Automation Conference in Anaheim,
California. BIRDs 41.7 and 42.3 and 43 will be up for a vote along with IBIS
Version 3.0 ratification. No telephone bridge will be available for this
meeting.
==============================================================================
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
LIBRARIAN: Jon Powell (805) 988-8250, Fax: (805) 988-8259
jonp@qdt.com
Transmission-Line Products Manager, Quad Design/Viewlogic
1385 Del Norte Rd., Camarillo, CA 93010
SECRETARY: Vacant
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 Jun 2 08:44:59 1997
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