DATE: 12/23/98
SUBJECT: 12/18/98 EIA IBIS Open Forum Minutes
VOTING MEMBERS AND 1998 PARTICIPANTS LIST:
AMP (Martin Freedman)
Applied Simulation Technology Norio Matsui, Raj Raghuram
Cadence Design (& UniCAD) C. Kumar, Don Telian, Patrick Riffault,
Craig Lewis, Greg Fitzgerald, Paul Galloway,
Patrick Dos Santos, Catherine Weiss,
Alain Tribaudot, Geoffrey Ellis,
Todd Westerhoff*, Ken Willis, Mike LaBonte*
Cisco Systems Syed Huq*, Sergio Camerlo, Irfan Elahi
Compaq Shariq Rahma, Jeff Chu, Bob Haller*,
(Digital Equipment Corp.) Doug Burns, Steve Coe
Cypress Bruce Wenniger
H.A.S. Electronics Haruny Said
Hewlett Packard (EEsof, etc.) Karl Kachigan, Henry Wu, Paul Gregory,
Brenda Arena, Hans Wiggers
High Design Technology Razvan Ene
HyperLynx Kellee Crisafulli, Matthew Flora*, Gene Garat,
Dave Kohlmeier
Incases Olaf Rethmeier*, Scott Jacobson,
Werner Rissiek
Intel Corporation Stephen Peters*, Arpad Muranyi*, Frank Kern,
(& formerly NCR) Will Hobbs, Prakash Radhakrishnan,
Mohammed Hawana, Martin Chang, Dave Moxley,
Tim Schreyer, Lyndell Asbenson
LSI Logic (Symbios Logic) Larry Barnes
Mentor Graphics (Zeelan, Bob Ross*, George Opsahl, Mark Noneman,
Interconnectix, etc.) Tom Dagostino, Karine Loudet, Jean Oudinot,
Manuel De Almeida, Stephane Rousseau,
Neven Orhanovic, Mohamed Mahmoud, Kevin Cohan
Mitsubishi Tam Cao
Motorola (Ron Werner)
National Semiconductor Cheng-Yang Kao, John Goldie, Ikchang Song,
Milt Schwartz
North East Systems Associates Edward Sayre, Kathy Breda, Michael Baxter,
(NESA) Jon Green, Jinhua Chen
NEC (Hiroshi Matsumoto)
Quantic EMC (Mike Ventham)
Texas Instruments Thomas Fisher, Harvey Stiegler,
Vincent Chang, Jean-Claude Perrin*,
Peter Forstner
Thomson-CSF Jean-Marc Claveau, Laurent Duzaic,
Saverio Lerose, Benoit Meyniel,
Jean Lefebvre
Viewlogic Jon Powell, Chris Rokusek*, Guy de Burgh,
Gary Mandel
VeriBest Ian Dodd, David Weins, Ian Gabbitas
VLSI Technology D.C. Sessions, Derwin Mattos
Zuken-Redac (John Berrie)
OTHER PARTICIPANTS IN 1998:
3Com Steve Miller
3Dfx Interactive Ken Wu
A.T.Sinker Tony Sinker
Actel Eric Tardif, Emmonvelle Gaudin
Aerospatiale Lionel Dreux, Claude Huet
Alcatel (Bell, Espace, etc.) John Fitzpatrick, W. Temmerman,
Laure Bessettes, Jean-Claude Pourtau,
Daniel Peron
ALS Design Yves Mouquet
Ansoft Eric Bogatin
Apple Fred Floresca, Danny Itani
Apteq Design Systems Dan FitzPatrick
Atmel Ali Baktashian
Avanti Nik Bannov
CERN Olivier Clere, Jean-Michel Sainson,
Rudi Zurbroken
Corning John Nieznanski
Crucial Technology Rathna Reddy
DIVA Corp Tieng Nguyen
Dynamic Research Corporation Mike Walsh
EIA Patti Rusher
EMC Fawn Engelmann, Fabrizio Zanella
ENST, Paris Jean-Jacques Charlot
European CAD Standardization Adam Morawiec
Intitiative (ECSI)
Fairchild Semiconductor Peter LaFlamme
Focus Technology John Salzillo, Gary Brophy, Mike Arieta,
Jim Skane
Hyundai Farhad Tabrizi
IBM Richard Steinle, Kevin Jackson, Greg Edlund,
Douglas Stout
InRange Elliot Lipin
Intracon Design Ltd. Derek Laidlaw
LG Semicon America Michael Spooer, Seung-Tae Lee
Micron Technology Terry Lee
Molex Gus Panella
Philips Semiconductor Todd Andersen
Rockwell Semiconductor Tim Gilbert
Scottish Electronics Robert Easson
Manufacturing Center (SEMC)
Seagate Vanessa Howard
Signal Integrity Software Barry Katz
SGS-Thomson Philippe Lefevre
Siemens Gerald Bannert, Bernhard Unger,
Christian Marot, Miguel Hernandez,
Gil Russell, Hartmud Terletzki
SSEI Tom Hawkins
Stratus Bruce Heilbrunn, Steve Mango, Lewis Steiner,
Karla Eignor, Rich Newell
Summit Computer Systems Bob Davis
Sun Microsystems Lam Dong, Kevin Ko, Tay Ansari, Ken Weiss,
Derek Tsai
Symmetry Andy Hughes
Tektronix Nassrin Ghahyasi, Tom Brinkoetter,
Brad Weber, John Rettig
Teradyne Michael Khusid
Time Domain Analysis Systems Dima Smolyansky*
Transmeta Bill Gervasi
TranSwitch Bill Todd
TRILOGIC Joe Socha
Ultratest International Chris O'Connor
Xilinx Susan Wu, Rob Eccles
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
January 15, 1999 (916) 356-9200 4-213768 9879517
Monday, February 1, 1998 IBIS Summit Meeting - No Teleconference
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
No change reported.
REVIEW OF MINUTES AND AR'S
No corrections. The ARs will be discussed during the meeting.
MISCELLANY/ANNOUNCEMENTS
None.
PRESS AND WEB PAGE UPDATES
Syed Huq reported several logo updates on the IBIS home page Poster link.
Syed also reported that he added the Accuracy Info link to the EIA IBIS Home
Page.
NEW MODELS AVAILABLE, LIBRARY UPDATE
Bob Ross reported that the American Microsystems, Inc IBIS models can now
be found at:
http://www amis.com/tgp/index2.html
The Cypress Link has been changed to:
http://www.cypress.com/design/support/models/index.html
Micron Technology is updating their site:
http://www.micron.com:80/mti/msp/models/index.html
Also, Micron Technology IBIS models can requested at:
http://www.micron.com/mti/msp/html/sim.html
Texas Instruments has changed the link for Clock Distribution models to:
http://www.ti.com/sc/docs/msp/cdc/ibis.htm
OPENS FOR NEW ISSUES
None.
INTERNATIONAL/EXTERNAL PROGRESS
- IEC 62014-1 (IBIS Version 2.1) - No report.
- pr EIAJ ED-5302 Standard for I/O Interface Model for Integrated Circuits
(IMIC) - Bob Ross reported that IMIC topics were discussed at the IBIS
Summit Meeting on December 7, 1998.
- IEC 93/67/NP IBIS and EMC Simulation - Bob Ross reports that although the
task group is operating at zero level, Jean-Claude Perrin reports that he
will present the document to IEC Central Office as an official document
during the TC77 (all EMC domains) meeting in Geneva. Jean-Claude reported
a meeting was held and the plan is to write a short file in an IBIS format
for a future buffer. This work is funded by Texas instruments and sponsored
by a French university. The work is expected to be completed by the end of
1999, but an initial, work in progress document is expected to be made
available for review in two to three months. Bob indicated that he would
put the work in the work in progress area.
- JC-16.2 Subcommittee: Modeling and Test - Bob Ross noted that the co-located
JEDEC JC-16.2 and IBIS Meeting will be discussed below.
- IEEE P1537 Electronic Data Format Project (Previously listed as the Standard
Component Data Sheet) - Stephen Peters had no further report.
IBIS (EAST) USERS GROUP MEETINGS
Bob Haller stated that no formal IBIS Users Group meetings have occurred.
However, the Connector Committee is meeting regularly and continuing its work.
Also the Accuracy Committee is continuing its work on the draft Accuracy
Specification document via regular teleconference meetings held on every other
Friday on dates that do not conflict with the IBIS Open Forum meeting dates.
The plan is to open up these meetings to everyone after DesignCon99. Bob
noted that the Accuracy Committee is interested in what is needed for formal
EIA approval. Bob Ross will talk to Bob Haller off line on some of the steps.
The immediate Committee goals are to finalize the trailer document format
before DesignCon99 and to focus on DesignCon99 preparation.
JEDEC/IBIS DECEMBER 7, 1998 SUMMIT MEETING (REVIEW)
Bob Ross commented that it was beneficial to meet several active JEDEC members
from semiconductor vendors who are interested in IBIS activities. Along with
several planned presentations, we had several good ad hoc presentations and
discussions.
Bob and Chris Rokusek did an ad hoc presentation at the JEDEC committee which
appears to have been well received.
Added note - the IBIS Summit documents, including several presentations, are
uploaded at
http://www.eda.org/pub/ibis/summits/dec98
DESIGNCON99 FEBRUARY 1, 1999 SUMMIT MEETING
Bob Ross summarized the activity to date that the IBIS Open Forum is an
Associate Sponsor of DesignCon99. As a result, DesignCon99 is providing
a meeting room, refreshments, and a booth at the exhibition. National
Semiconductor will be a co-sponsor and provide the buffet lunch. Milt
Schwartz will be handling the local logistics including signup, collecting and
copying the presentations that are submitted beforehand. The first call for
participation has been sent out.
Bob Haller noted that the Accuracy Committee will provide a small demo at the
booth. Hewlett-Packard has agreed to supply equipment for capturing
waveforms and for taking TDR measurements.
Bob noted that Jon Powell is the focal point for logistics. Based on
reflector email, Jon will accept company logos directly on velcro backed
8-1/2 by 11 inch placards.
DATE99 MARCH 9, 1999 SUMMIT MEETING
Bob Ross stated that the meeting time had been moved from Friday, March 12,
1999 to Tuesday, March 9, 1999 to avoid conflict with the trade show. At
the DATE98 show in Paris, the IBIS meeting was scheduled on Friday to avoid
such conflict. At this years show in Munich, the DATE99 trade show is from
Wednesday through Friday.
Bob noted and Olaf Rethmeier confirmed that INCASES will be a co-sponsor. Bob
will work offline with others concerning additional co-sponsorship. Bob also
expects to get initial information out in early January, 1999.
VERSION 3.2 PARSER DEVELOPMENT
Bob Ross indicated that he communicated the BIRD55 change regarding adding
a Vmeas subparameter to the [Model Spec] keyword to Atul Agarwal, and Atul
will make the ibischk3 change.
Matthew Flora had commented that some minor corrections were needed so that
that ibischk3 would compile with GNU and Microsoft compilers without warnings.
For example, some comparisons between unsigned integers and signed integers
ought to be fixed. Matthew stated that these minor changes were not yet sent
to Atul. Matthew wanted Atul to continue with higher priority functional
changes and the minor corrections to eliminate warnings could be made later.
Bob indicated that those changes could be included in the next revision of the
accepted parser.
Matthew indicated that he received good response to a note he sent to the
parser distribution list inviting those who were not on the
ibischk-bug@eda.org "reflector" to join. People on that list will be
receiving the latest bug reports, details, and questions on ibischk3
development.
Bob stated that he uploaded ver3_2e.ibs in the work in progress directory
with BIRD55 included. He expected to upload ver3_2f.ibs based on how BIRD56
and BIRD57 are resolved later in this meeting.
TEKTRONIX IPA 510 SOFTWARE DISTRIBUTION PROPOSAL
Bob Ross moved this discussion to the end of the meeting to allow time for
dealing with the scheduled technical issues.
COOKBOOK STATUS
(Not Discussed)
IBIS MODEL REVIEW COMMITTEE DISCUSSION
Matthew Flora reported that he distributed a Texas Instruments Version 2.1
level LVDS IBIS model with for review. The old AR remains.
AR - Matthew Flora to issue to the IBIS reflector a short write-up on the IBIS
Model Review Committee.
BIRD56 - RELAXATION OF THE [Series Pin Mapping] RESTRICTION
Bob Ross introduced BIRD56 for discussion and vote. Matthew Flora wanted an
example showing the expanded functionality. Arpad Muranyi promised an example
from a model which provided the original motivation for BIRD56. Bob also
indicated the he might provide an example using a Series element as a
differential termination.
AR - Arpad Muranyi provide an IBIS model example for BIRD56.
There was some discussion indicating that removing the original limitation
was motivated by practical considerations with real devices. The original
limitation was not based on any technical need, but on consistency with the
terminator models. Matthew suggested changing "reserved words" to "reserved
models" since the reserved word "NA" was not intended to be included in the
list. Matthew showed in Section 3 (General Syntax Rules and Guidelines), that
item 2) documents this distinction. Bob accepted this change (thereby
incrementing BIRD56 to BIRD56.1). A vote was taken.
BIRD56.1 was approved unanimously with one abstention.
AR - Bob Ross produce BIRD56.1 with the agreed upon editorial corrections.
BIRD57 - TIMED BUS HOLD EXTENSION
Arpad Muranyi introduced the recently submitted BIRD57 by indicating that a
current implementation of the bus hold submodel has the model turn off using
an internal timer or external trigger signal. The "Off_delay" parameter
provides the additional functionality to deal with this capability.
Bob Ross added that the bus hold functionality has been expanded in practice
to include a high-Z mode. Since transitions from an on state to/from a high-Z
state is not included in any current IBIS model time transitions for totem
pole topologies, an alternative way is suggested in practice. The Open_drain
(Open_sink) and Open_source configurations can each be viewed as transitioning
from an on state to a high-Z state. An Open_source and Open_sink submodels
can be used together to describe transitions from high-Z, both from a low and
high state. Arpad clarified that when the Off_delay is defined, it is for a
submodel with either just a [Pullup] table (for Open_source mode) or a
[Pulldown] table (for Open_sink mode).
Arpad stated that both V_trigger_r and V_trigger_f are required, So the
switching can occur either due to the signal at the input pad switching or
due to reaching the Off_delay time, which ever comes first. If the trigger
voltage is out of range, then it will not be used. Or if the Off_delay
is set to a very long value, the timed mode will be disabled.
Mike Lebonte asked for clarification regarding when the Off_delay begins.
Arpad clarified that it begins when the signal at the input pad crosses the
trigger threshold.
Matthew Flora had two editorial changes to remove a redundant "tab" statement
and to add a missing "the" word. Bob had an editorial change from using the
the verb "model" to the verb "simulate". These changes were accepted and
caused BIRD57 to be incremented to BIRD57.1.
Mike suggested that Off_delay be made more specific and refer to it being
referenced from a trigger voltage rather than an external clock. After
further discussion we decided on no change. Rather, if the functionality were
to be enhanced in the future to include a different delay mode, the new
subparameter would have a more detailed name.
Mike also asked for guidance on how the min and max column entries are
defined. Bob found that this was discussed in BIRD57. The general guidance
is to enter the values based on absolute min and max delays. The columns of
the Off_delay subparameter do not correlate with process corners or voltages
directly. There is a similar lack of correlation with C_comp. So Off_delay
and C_comp are unique subparameters under [Submodel] and [Model] because they
are entered based on magnitude rather than by association with [Voltage Range]
or voltage reference values like all of the other subparameters.
After this discussion, Bob called for a vote on BIRD57.1.
BIRD57.1 was approved unanimously with one abstention.
AR - Bob Ross produce BIRD57.1 with the agreed editorial corrections.
VERSION 3.2 RATIFICATION PREPARATION
Bob Ross indicated that all of the open BIRDs have been resolved. We should
plan for a ratification vote at the next meeting (scheduled on January 15,
1999). A number of activities will take place. BIRD56.1 and BIRD57.1 will be
uploaded. The unofficial work in progress document will be incremented to
ver3_2f.ibs to include the approved BIRD56.1 and BIRD57.1. The date used in
the examples will be changed from December 18, 1998 to January 15, 1999 since
Bob embeds the ratification date of each release into the IBIS document. A
cleaned up voting copy designated ver3_2.ibs along with ver3_2f.ibs will be
uploaded for review at
http://www.eda.org/pub/ibis/wip
Bob noted that he had started work on ver3_2.ibs before BIRD57 was issued.
Editorial corrections will be welcome. These corrections will be included in
the accepted version of the document.
AR - Bob Ross to upload ver3_2f.ibs and ver3_2.ibs to the work in progress
directory by December 24, 1998.
AR - Everyone to review these documents and provide corrections to Bob Ross or
the IBIS reflector.
In addition, Bob noted that some parser changes will be communicated to Atul
Agarwal as a result of BIRD56.1 and BIRD57.1 adoption. Bob hopes that the
updated parser will be available for voting at the next meeting. Also Chris
Rokusek indicated that he will be able to make executables of this version.
BUG31 - ERROR FOR [Pulldown] DECREASING CURRENT SHOULD BE WARNING
Bob Ross mentioned that the main intent of BUG31 is to convert some V/I table
Error messages into Warning messages. The error message was originally
introduced because the polarity rules regarding when currents and voltages
were positive and negative was confusing and a common source of error. This
was especially true when dealing with both CMOS/TTL and ECL technologies. A
newer architecture that was not anticipated allows, for example, the ground
clamp to be active only in the Input mode of an I/O buffer. The ground clamp
may be switched out for the output mode. One way to deal with this in Version
2.1 level IBIS models is to add a compensating current in the Pulldown and
Pullup tables in the ground clamping regions to compensate for the ground
clamp table that would still be in the model. This compensation would usually
cause the parser to produce an error - even though the summed I/V tables are
monotonic and in compliance with the overall polarity guidelines.
Bob indicated that the dynamic clamp submodel in static mode would be the
correct way to deal with this structure using IBIS Version 3.1.
The committee voted to fix the parser based on BUG31 and change the Error
message to a Warning.
AR - Bob Ross to communicate ibischk3 parser changes to Atul Agarwal.
TEKTRONIX IPA510 SOFTWARE PROPOSAL DISCUSSION
Syed Huq indicated that he will put some new information on the IBIS reflector
to update us on some additional options.
NEXT MEETING:
The next meeting will be on Friday, January 15, 1999 from 8:00 AM to 10:00 AM.
IBIS Version 3.2 Ratification Vote is planned. Ibischk3 parser acceptance
vote is also planned.
==============================================================================
NOTES
IBIS CHAIR: Bob Ross (503) 685-0732, Fax (503) 685-4897
bob_ross@mentorg.com
Modeling Engineer, Interconnectix BU of Mentor Graphics
8005 S.W. Boeckman Road, Wilsonville, OR 97070
VICE CHAIR: Stephen Peters (503) 264-4108, Fax: (503) 264-4515
sjpeters@ichips.intel.com
Senior Hardware Engineer, Intel Corporation
M/S JF1-56
2111 NE 25th Ave.
Hillsboro, Oregon 97124-5961
SECRETARY: Matthew Flora (425) 869-2320, Fax: (425) 881-1008
mbflora@hyperlynx.com
Senior Engineer, HyperLynx, Inc.
17641 NE 67th Court
Redmond, WA 98052
LIBRARIAN: Jon Powell (805) 988-8250, Fax: (805) 988-8259
jonp@qdt.com
Senior Scientist, Viewlogic Systems(formerly Quad Design)
1385 Del Norte Rd., Camarillo, CA 93010
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@eda.org
To join, change, or drop from either the IBIS Open Forum Reflector
(ibis@eda.org), the IBIS Users' Group Reflector (ibis-users@eda.org)
or both. State your request.
ibis-info@eda.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@eda.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@eda.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@eda.org
To report ibischk2 parser bugs. The Bug Report Form Resides on
eda.org in /pub/ibis/bugs/ibischk/bugform.txt along with reported bugs.
To report s2ibis, s2ibis2 and s2iplt bugs, use the Bug Report Forms
which reside under eda.org in /pub/ibis/bugs/s2ibis/bugs2i.txt,
/pub/ibis/bugs/s2ibis2/bugs2i2.txt, & /pub/ibis/bugs/s2iplt/bugsplt.txt
respectively.
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 eda.org for more information on previous
discussions and results. You can get on via FTP anonymous.
==============================================================================
Received on Wed Dec 23 15:41:24 1998
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