Text item: Text_1
Date: February 2, 1994
From: Derrick Duehren (503) 696-4299, fax (503) 696-4904
dduehren@ichips.intel.com
Intel Program Manager
(Will Hobb's IBIS Assistant)
Intel Corporation
5200 NE Elam Young Pkwy, Hillsboro, Oregon 97124 USA
and
Will Hobbs (503) 696-4369, fax (503) 696-4210
Intel Modeling Manager
Subject: Minutes from IBIS Open Forum 1/28/94
To:
Anacad Petra Osterman
AnSoft Henri Maramis
Atmel Corporation Dan Terry
Cadence Design Sandeep Khanna, Chris Reed,
Pawel Chadzynski, Kumar*
Contec Maah Sango*, Dermott Lynch,
Clark Cochran, Mike Venthon*
Digital Equipment Corp. Berry Catz*
High Design Technology Michael Smith
HyperLynx Steve Kaufer, Kellee Crisafulli*
IBM Jay Diepenbrock
IBM-Motorola alliance Lynn Warner*, Soa Quoc*
Integrity Engineering Greg Doyle, Wayne Olhoft
Intel Corporation Stephen Peters*, Don Telian, Will Hobbs*
Arpad Muranyi*, Derrick Duehren*
Interconnectix, Inc. Bob Ross*
Intergraph Ian Dodd*, David Wiens*
IntuSoft Charles Hymowitz
Logic Modeling Corp. Randy Harr
Mentor Graphics Greg Seltzer, Ravender Goyal
Meta-Software Mei Wong
MicroSim Arthur Wong*, Jerry Brown, Graham Bell
National Semiconductor Syed Huq*
North Carolina State U. Paul Franzon, Michael Steer, Steve Lipa
Performance Signal Integrity Vivek Raghawan, Eric Bracken*
Quad Design Jon Powell
Quantic Labs Mike Ventham, Zhen Mu
Siemens Nixdorf Werner Rissiek, Olaf Rethmeier*
Texas Instruments Bob Ward*
Thomson-CSF/SCTF Jean Lebrun
Zeelan Technology Hiro Moriyasu*, George Opsahl*,
Samie Samaan, Tay Wu
CC:
Intel Corporation Randy Wilhelm, Jerry Budelman,
Intel IBIS team
In the list above, attendees at the 1/28/94 meeting are indicated by *
Upcoming Meetings: Date: Bridge: Res:
2/18/94 (415) 904-8800 661436
3/11/94 (415) 904-8944 661901
4/1/94 (415) 904-8944 661905
All meetings are 8:00 AM to 10:00 AM PST. 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, as always, ask for the IBIS Open Forum
and give the bridge operator the reservation number.
Please note: If you know of someone new who wants to join the e-mail
reflector (ibis@vhdl.org), or have updates to your e-mail address, send
e-mail to ibis-request@vhdl.org.
------------------------------------------------------------------------
Meeting Agenda
--------------
In keeping with the wishes of various participants, Will arranges the
order to keep technical discussions later.
8:15 Check-in
8:20 Introductions of new IBIS members/participants Hobbs
8:25 1/7 minutes review Duehren
Opens for new issues All
Treasurers Report Hobbs
8:35 Press updates Hobbs/All
Progress toward enlisting new IC vendors All
IBIS 2.0 Hobbs
Forms of EDA support of IBIS Duehren
IBIS Cookbook Hobbs
Dues? For what? Hobbs
8:50 BIRD 6, Differential Pin Spec. Ross
BIRD 7, Open Specification Completion Ross
Egg 1, mutual pin coupling Bracken
Spice to IBIS Converter Lipa
9:15 Canright paper Ward
Formal BNF notation Reed, Harr
BIRD 2, VIH, VIL Thresholds for Inputs Powell
9:30 3D Modeling (U of NC) Bracken, et. al.
High freq. $ EMI Goyal, et. al.
9:45 Phased turn-on/off of multiple devices Powell
Foils of IBIS Summit Hobbs
9:55 Wrap-up, Next Meeting Plans Hobbs
Minutes
-------
1. New members, 11/12 Minutes review, Open time for new issues:
There were no new members to announce and no corrections were made to
last month's minutes.
2. Opens for new issues
Derrick will post all the BIRDs to the forum this week. He has cleaned
up formatting inconsistencies and problems (such as converting tabs
to spaces). The files are named with p (new/pending), a (approved), or
d (dead) prefixes (such as abird3_0.txt, for approved BIRD 3.0).
Arpad Muranyi: We need agreement on when to clamp the low state of the
pull-down curve of tri-stateable components.
AR Arpad M.: Post your ideas to reflector.
In regard to monotonic current tracing, one axis must be monotonic. It
is not specified well and needs a BIRD. Discussion to be continued on
the reflector.
AR Kellee C.: Please be the owner for this BIRD.
Intel has Pentium(TM) processor chip set IBIS models on vhdl.org. No
other company directories exist.
3. Press updates
HyperLynx press release in Test & Measurement World, Jan. '94.
4. Progress toward enlisting new IC vendors
NEC and another IC vendor have shown IBIS interest.
5. Treasurers Report
Contractor work on the parser has been paid. We now have a $2,195.21
balance.
6. IBIS 2.0
Clarification of last meeting's decision. Will suggests a full-day
meeting to ratify 2.0, perhaps during the DAC (design automation
conference) conference (June 6- 10? in San Diego).
7. Forms of EDA support of IBIS
Derrick has compiled a database of all forum members.
AR Derrick D.: Send out existing database with instructions for
participants to fill out/correct their information.
2/2/94 Update: Done. Numerous responses already received.
8. IBIS Cookbook
Intel is producing an internal cookbook that describes how to generate
IBIS models from simulated and actual data. It needs to be more robust.
Intel will make non-proprietary parts available to the forum.
Lynn Warner expressed need for basic instructions now. He was directed
to the Overview book and Steven Peters volunteered to help.
9. Dues? For what?
Will asked the forum to consider what dues (if collected) would be used
for. The following ideas were voiced:
o Cookbook contractor
o DAC booth
o IBIS checker program (parser) maintenance
10. BIRD 6, Differential Pin Spec.
Bob Ross summarized BIRD 6. IBIS needs to support differential devices.
Bob Ward asked for clarification on definition of the differential
devices; signal/signal differential around a common reference. Lively
discussion ensued with Kumar, Syed H., Steven P., and Kellee C. Bob Ross
would like to have this referenced to the data book.
Kumar asked how you do the V/I differentially? Answer: No, two single-
ended V/I measurements. You would model each pin individually.
Syed: NSC is interested in developing such models, the reference is not
necessarily around zero.
HyperLynx: We need some type of skew specification. Bob: min, typ or max
or just max? Kellee: all three allowed, typ is required. If not
specified, = 0? Is that min or typ? How about low-to-high skew versus
high-to-low? Min will always be zero.
AR Bob Ross: Revise Bird 6 to address skew and post for discussion.
11. BIRD 7, Open Specification Completion
Bob Ross, summarized and gave the background of the BIRD. Bob wants to
expand the BIRD (spread its wings).
The fundamental question is: should we explicitly specify all the model
types, even though the data may make it implicit (no pull-up vi=> open
pull-up, e.g.,). There is human readability value. Bob favors the
latter, and expanding to include ECL and pull-up resistors, etc.
For IBIS version 2, new model types will be required to be specified,
whereas in 1.1, open side is inferable and will remain so.
Kellee: The recommendation we have in version 1.1 for derivation of ramp
rates only really works well for CMOS. It needs revision.
Kumar proposed terminal mapping. Need to ensure backward compatibility.
AR Bob Ross to update the BIRD to 7.1 and post for discussion.
Terminator issue are to be left to another BIRD.
12. Egg 1, mutual pin coupling
Eric B. summarized the Egg.
Sparse matrix versus banded matrix. DEC feels mutuals are very
important. IBM has requirement for this capability in a full diagonal
matrix (banded or sparse will not be sufficient)or else IBIS won't work
for IBM. Mutuals account for 90% of the capacitance of the package,
particularly with ball grid array. Capacitive and inductive parameters
are only ones required. NSC and TI also feel this is important, too.
Bob Ward also emphasized that the power and ground pins need to be
included, too. On a 200 pin package, that would be a 200x200 matrix,
40,000 entries!
Lynn of IBM: Recommended breaking it into several triangular matrices,
one for capacitance, one for inductances, etc.
An include file looks like a win here, so we can change packages. Kellee
points out we have side issues with include files: file naming
conventions, directory conventions. And if we have a part that comes in
multiple packages, could the IBIS file have all the pointers for each of
the package types?
Lynn: Are we focusing too much on file size and not enough on
functionality?
AR Eric: Generate Egg 1.1 for more discussion.
13. Spice to IBIS Converter
A Ph.D. student has a grant to write a first-level converter. We need to
discuss this issue on reflector. Lingering question: what flavor of
PUBLIC Spice model as source?
14. Canright paper
No discussion, out of time.
15. Formal BNF notation
No discussion, out of time.
16. BIRD 2, VIH, VIL Thresholds for Inputs
No discussion, out of time.
17. 3D Modeling (U of NC)
No discussion, out of time.
18. High freq. $ EMI
No discussion, out of time.
19. Phased turn-on/off of multiple devices
No discussion, out of time.
20. Foils of IBIS Summit
5 copies of the IBIS foils of the November summit are available from
Derrick Duehren (address information above).
21. Wrap-up, Next Meeting Plans
We decided to start the meeting at 8:00 in the future so we'll have a
full two hours.
Received on Wed Feb 2 22:58:14 1994
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