DATE: 5/19/98
SUBJECT: 5/15/98 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
Cypress (Bruce Wenniger)
Digital Equipment Corp. Jeff Chu, Greg Edlund*, Bob Haller
Hewlett Packard (EEsof, etc.) Karl Kachigan, Henry Wu, Paul Gregory
High Design Technology Razvan Ene
HyperLynx Kellee Crisafulli, Matthew Flora*
Incases Olaf Rethmeier, Scott Jacobson,
Werner Rissiek
Intel Corporation Stephen Peters*, Arpad Muranyi*, Frank Kern,
Will Hobbs, Prakash Radhakrishnan,
Mohammed Hawana*
Columbia, SC (formerly NCR) Dave Moxley*
Mentor Graphics (Zeelan, Bob Ross*, George Opsahl, Mark Noneman,
Interconnectix, etc.) Tom Dagostino, Karine Loudet, Jean Oudinot,
Manuel De Almeida, Stephane Rousseau,
Nevin Orhanovic
Mitsubishi Hoang Nguyen, Tam Cao
Motorola (Ron Werner)
National Semiconductor Syed Huq, Cheng-Yang Kao, John Goldie,
Ikchang Song
North East Systems Associates Edward Sayre, Kathy Breda
(NESA)
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
Zuken-Redac (John Berrie)
OTHER PARTICIPANTS IN 1998:
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
Avanti Nik Bannov
CERN Olivier Clere, Jean-Michel Sainson,
Rudi Zurbroken
Compaq Shariq Rahma
Crucial Technology Rathna Reddy
EIA Patti Rusher*
EMC Fawn Engelmann
ENST, Paris Jean-Jacques Charlot
European CAD Standardization Adam Morawiec
Intitiative (ECSI)
Fairchild Semiconductor Peter LaFlamme
H.A.S Electronics Haruny Said
Intracon Design Ltd. Derek Laidlaw
Philips Semiconductor Todd Andersen*
Scottish Electronics Robert Easson
Manufacturing Center (SEMC)
Seagate Vanessa Howard
SGS-Thomson Philippe Lefevre
Siemens Gerald Bannert, Bernhard Unger,
Christian Marot, Miguel Hernandez,
Gil Russell
Symmetry Andy Hughes
Tektronix Nassrin Ghahyasi
Ultratest International Chris O'Connor
Xilinx Susan Wu
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
June 5, 1998 (916) 356-9200 4-167410 9468535
June 18, 1998 IBIS Summit Meeting - No Phone 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
Mohammed Hawana heads the XTG modeling group from Intel and is involved in
distributing I/O Buffer Models.
MEMBERSHIP UPDATE AND TREASURER'S REPORT
Patti Rusher sent Bob Ross a financial report. Bob stated that there are
23 IBIS members. He is tracking down the payment status for one membership
and for four parser invoices, and Patti is checking with the EIA accounting
department regarding whether payment has been made.
REVIEW OF MINUTES AND AR'S
Bob noted that some minor editorial corrections were made on the April 24,
minutes. The ARs will be discussed during the meeting.
MISCELLANY/ANNOUNCEMENTS
Syed Huq is out until Wednesday, May 27, 1998 to be home for his second
baby.
PRESS AND WEB PAGE UPDATES
Greg Edlund stated that the May 1998 issue of Printed Circuit Design contains
his article "IBIS Model Accuracy" on pages 40-42.
Bob Ross mentioned a brief writeup on the Cadence free modeler in the
April 23, 1998 issue of EDN, pg. 14.
NEW MODELS AVAILABLE, LIBRARY UPDATE
Jon Powell updated the official EIA IBIS home page Model links with many
updates found by Matthew Flora and Bob Ross. Some of these are noted below:
Atmel URL is changed to:
http://www.atmel.com/atmel/products/prod180.htm
Enhanced Memory Systems (owned by Ramptron International Corporation) has a
model request form which includes IBIS Models:
http://www.edram.com/modelfrm.html
Fairchild Semiconductor no longer has CGS models, and the GTL URL has
changed:
http://www.fairchildsemi.com/models/ibis/gtl/index.html
Hewlett-Packard has added an IBIS model for the Gigabyte products:
http://hpcc920.external.hp.com/HP-COMP/gigabit/ibis.html
IBM has added some Power-PC IBIS models at
http://www.chips.ibm.com/products/ppc/documents/datasheets/products.html
IC Works is has IBIS models at:
Integrated Device Technology URL has changed to:
http://www.idt.com/models/Welcome.html
International Microelectronics, Inc. FTP site is relocated to:
ftp://ftp13.ba.best.com/pub/imiweb8/ibis
Mosel Vitelic has DRAM model for 16M and 64M devices at
http://www.moselvitelic.com/sec2/Dynamic.html
Motorola has added several links for IBIS models for Fast SRAM products.
Select Asynchronous Fast SRAMs, Burst RAMs, Integrated Cache Solutions, and
Tag RAMs under:
http://www.mot.com/SPS/FastSRAM/productupdate
The Samsung links have been changing. For a while they were supplying DRAM
models, and the SRAM link had a listing of models and a request form at the
bottom. However, it now appears that the top level link is needed. You
select Products and the "Service" paths to get to the IBIS models. The
SRAM IBIS model listing and request form are available. A DRAM path is not
activated. The Graphics RAM IBIS models listed, but the IBIS links are
not working. The top level link is:
Texas Intruments has some PC100 sites for ALVC and CDC models:
http://www.ti.com/sc/docs/asl/pc100.htm
http://www.ti.com/sc/docs/msp/cdc/pc100.htm
OPENS FOR NEW ISSUES
Patti Rusher and Bob Ross on the EDA Booth and IBIS Meeting at the Design
Automation Conference.
INTERNATIONAL/EXTERNAL PROGRESS
- IEC 62014-1 (IBIS Version 2.1) - Patti Rusher indicated that a meeting
was held where a number of IEC numbers were changed. However, the IBIS
number is still the same. Patti is still waiting for IEC 60214-1 to
be formally ratified - possibly at the IEC meeting in September, 1998.
- pr EIAJ ED-5302 Standard for I/O Interface Model for Integrated Circuit
(IMIC) - Bob Ross got a message from Fukuda-san regarding the web page
below:
http://tsc.eiaj.or.jp
The "Outline of I/O Interface Project Group" link is new, and Version 1.1
dated March 31, 1998 is in a .pfd format. Bob noted that a few pages could
not be printed because of some font problems. The comment deadline is
June 10, 1998
- IEC 93/67/NP IBIS and EMC Simulation - Jean-Claude Perrin reported that
another meeting will be held in May, 1998. Jean-Claude sent Bob Ross the
Power Point presentation given at the February 27, 1998 Experts meeting
in Paris, and Bob has uploaded it to eda.org under the /pub/ibis/wip
directory.
- JC-16B - Patti Rusher stated that she is reserving more hotel space at an
adjacent hotel for the co-located JEDEC and IBIS Summit meeting to be held
in San Diego in December, 1998. Patti indicated that while the scope of
the JEDEC committee includes software, the committee itself is not really
doing any work in this area. Bob Ross indicated interest in the flexible
impedance driver work that D.C. Sessions mentioned in some recent signal
integrity reflector discussions.
IBIS EAST USERS GROUP ACTIVITIES
Greg Edlund reported that the Model and Validation subcommittee will be
meeting on Thursday, May 21, 1998 at Digital. He will get a telephone number
for interested people to call in. The regular Users group meeting is moved
to Thursday, May 28, 1998 and will be held at Stratus Computer.
Greg contacted Kathy Breda, and the plan is to consider an IBIS course at
or near the IBIS Summit location to be held in October, 1998. The class is
not planned to be tied in with the PCB Conference East.
IBIS LOGO CHANGE
No vote was held. Rather, the committee decided to use the current logo
that is on the EIA IBIS Home page. Some minor changes were suggested at the
April 24, 1998 meeting regarding the IBIS name size, etc., but no alternative
designs have been created. Patti Rusher mentioned that the logo will be
refined and will be of a higher quality in preparation for the Design
Automation Conference (DAC) EDA booth graphics displays . Bob indicated that
changes could be made after DAC, but the logo already looks very good.
At the April 24, 1998 meeting, the question was raised, but not addressed,
on whether the IBIS Users group could use the new IBIS logo. Bob supported
the IBIS Users Group using the IBIS logo, if they wish, since the work the
Users Group is doing is in close cooperation with the IBIS Open Forum.
EDITING COMMITTEE
Bob Ross uploaded an UNOFFICIAL IBIS ver3_1c.ibs document with the BIRD47
change and other minor changes on eda.org under /pub/ibis/wip.
The BNF AR remains.
AR - Bob Ross generate and post a BNF for IBIS Version 3.0 (an IBIS Version
3.0 ratification AR).
BIRD44 - INTERPRETATION OF MIN/MAX/WEAK/STRONG DATA
Bob Ross indicated no progress.
AR - Andy Ingraham to issue BIRD44.1 with the changes and extensions noted
in the March 13, 1998 IBIS Open Forum meeting minutes.
IBISCHK2+ (VER 2.1.15) PROGRESS
Matthew Flora indicated that he received a set of changes from Chris Rokusek
to make the parser work equally well in UNIX and DOS environments. Bob
Ross indicated that there are currently six BUGs fixed in the ibischk3 and
ebdchk3 preliminary code, and these fixes should be planned for the
Version 2.1.16 release.
BUG28 - ENDPOINT MISSED DUE TO FLOATING POINT PRECISION
Bob Ross explained that Chris Rokusek discovered and provided a correction
to a floating point precision problem when the load line intersection point
falls exactly on a I/V segment endpoint. Chris' solution involves setting
a tolerance limit for floating point compares.
Bob classified this as Moderate, Medium, Open, and intends that this fix be
rolled into ibischk2+ Version 2.1.16.
VERSION 3.1 PARSER DEVELOPMENT
Bob Ross stated that he did a review of the ibischk3 and ebdchk3 Version
3.0.1 and sent the comments to Atul Agarwal. Overall, the parsers are in
very good shape and are very useful in their preliminary forms. Bob
mentioned that there were a few error messages that were confusing or
missing. Also he might want to change the warning messages for negative
times under [Model Spec] to error messages. The test files for the
Electrical Board Description are functioning. However, more test files
and more investigation would be valuable. He encourages anyone interested
in the .ebd syntax to look at that part of the parser.
Chris Rokusek provide Bob the executables for the Version 3.0.1 release,
and Bob uploaded them to eda.org under /pub/ibis/ibischk3 in a compressed
form per the AR. These are preliminary code, but should be useful for
review and for doing IBIS Version 3.0 extensions.
COOKBOOK
Stephen Peters reports that there no is progress on the Cookbook project.
IBIS MODEL REVIEW COMMITTEE DISCUSSION
Matthew Flora indicated no activity other than one model that he did not
forward since it did not pass the ibischk2+ test. Matthew suggested that
information about the IBIS Model Review committee and process be sent out
again. Bob suggested that Matthew prepare a short writeup indicating that
models for review should be sent to Matthew. They will be distributed to
to five other EDA tool vendors for review. Comments and suggestions will be
given back privately to the model developer. The purpose is to help the
model developer provide better models and information that the EDA tools
need to process IBIS models. Matthew indicated that the reference to the
Model Review committee in Greg Edlund's article mentioned above may have left
the false impression that only Hyperlynx will be reviewing the models.
For general information, the contact person is:
Matthew Flora, HyperLynx mbflora@hyperlynx.com
AR - Matthew Flora issue to the IBIS reflector a short writeup on the IBIS
IBIS Model Review committee.
DESIGN AUTOMATION CONFERENCE (DAC) IBIS SUMMIT MEETING AND EDA BOOTH
Patti Rusher had asked whether the IBIS committee wanted to have handouts
for the EDA booth at DAC. After some discussion, the only handout will be
a one page writeup on IBIS giving some general information and some sources
for more information. Much information including magazine information and
IBIS links are already on line. Bob Ross asked Stephen Peters to prepare
a one-page handout.
AR - Stephen Peters prepare a one page IBIS information sheet to be handed
out at the EDA booth at DAC.
Bob indicated that the agenda is open for the San Francisco IBIS Summit
meeting at DAC on June 18, 1998. Election of officers will be held. Bob
expects some technical discussions and presentations to relate to the BIRDs
that are being considered. However, other presentations will be welcome.
Bob will send out information on the DAC IBIS Summit meeting including a
request for presentations.
BIRD42.3 - MODELING CURRENT WAVEFORMS
Bob Ross stated that there was some signal integrity and IBIS reflector
discussion on crowbar currents that are related to this issue. Bob is
planning that BIRD42.3 be discussed at the next (June 8, 1998) IBIS meeting.
BIRD48.1 - ADD MODEL
BIRD49.1 - ADD MODEL DYNAMIC CLAMPS
BIRD50 - ADD MODEL BUS HOLD
Bob Ross had sent out BIRD48.1 and BIRD49.1 and introduced the revisions.
Bob mentioned that he and Arpad Muranyi also had discussed the extensions the
previous day.
One revision in BIRD48.1 was add additional references in the [Model]
keyword for the Dynamic_clamp and Bus_hold subparameters of Model_type.
Also, the Add_model_mode subparameter was added to the [Model] keyword sub-
parameter list. It is to be used when the model is used as an added model.
The Add_model_mode arguments are Output and Non-Output. When the top-level
model is an I/O or 3-state model, the Add_model_mode is used to restrict
the operation of the added model, if needed, to just Output mode or Input
or 3-state mode. For example, the dynamic clamp functionality may exist only
for the Input mode of an I/O buffer. Arpad suggested changing the names of
the arguments to Driving and Non-driving, and Bob agreed.
There was discussion concerning whether the Add_model_mode subparameter
should be in the added model or in the top-level model which calls the added
model. One advantage of moving it to the top level is that the modes of
operation for the added model will clearly tie in with the Model_type of
the top-level model.
Stephen Peters questioned whether the [Driver Schedule] keyword is impacted
by the Add Model structures, and Bob indicated that the Add Model details
are separate.
Bob also noted that the V_trig_r and V_trig_f syntax would be corrected to
V_trigger_r and V_trigger_f, consistent with BIRD49.1 and BIRD50 usage.
Some other text corrections will be made for notation and clarity per
discussions at the meeting and with Arpad.
BIRD49.1 extended the dynamic clamp functionality to include a non-triggered
method of invoking it. In practice, dynamic clamps can also be invoked by
a separate clock. The method proposed in BIRD49.1 involves using a negative
time value as the first entry of the [GND Pulse Table] or [POWER Pulse
Table] keyword. The corresponding V_trigger_f or V_trigger_r entries would
be omitted or ignored. There was some discussion and concern on using
negative numbers, and this will be investigated. Arpad had provided a
several technical and editorial comments off line. Stephen Peters will also
provide some editorial comments off line to be considered.
BIRD50 remains unchanged regarding the bus hold functionality and was not
reissued. However, the title is incorrect, so BIRD50.1 will be issued to
at least change the title. Bob noted that the functionality can be used
beyond just modeling bus hold.
AR - Bob Ross issue BIRD48.2, BIRD49.2 and BIRD50.1 to capture the changes
in this discussion and in the off line discussions.
Bob Ross is planning to call for a vote BIRD48.2, BIRD49.2, and BIRD50.1
at the June 5, 1998 meeting. Stephen commented that he would like more
participation by EDA vendors on this discussion. Bob agreed to discuss
this with some of the EDA vendors.
BIRD46.1 - RELAXATION OF SOME IBIS FILE NAME RESTRICTIONS
Since BIRD46.1 has not been issued, Bob Ross deferred the discussion.
AR - Matthew Flora issue BIRD46.1 to include references to the .pkg file
and .ebd file and to change the limitation from 64 total characters to
a <filename> limit of 20 characters and delete the references to allowing
the period "." character.
BIRD51 - 3-STATE ECL
Bob Ross introduced BIRD51. Even though BIRD51 extends over several pages,
it changes only a few lines to add 3-state-ECL to the list of Model_type
subparameters under [Model] and under Ramp in Notes on Data Derivation
section.
As indicated before, several ECL devices with a true high-Z mode. BIRD51
will be scheduled for a vote at the next meeting.
NEXT MEETING:
The next teleconference meeting is on Friday, June 5, 1998, 8:00 A.M. to
9:55 A.M. BIRD48.2, BIRD49.2, BIRD50.1, BIRD51, will be scheduled for a
vote. BIRD46.1, if issued, is scheduled for a vote. BIRD42.3 is scheduled
for technical discussion.
==============================================================================
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: 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
SECRETARY: 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
LIBRARIAN: Jon Powell (805) 988-8250, Fax: (805) 988-8259
jonp@qdt.com
Senior Scientist, Viewlogic (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 May 20 09:06:25 1998
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