Text item: Text_1
Date: June 20, 1994
From: Will Hobbs (503) 696-4369, fax (503) 696-4210
Will_Hobbs@ccm2.jf.intel.com
XTG Modeling Manager, Intel Corp., Chairperson, IBIS Open Forum
Intel Corporation
5200 NE Elam Young Pkwy, Hillsboro, Oregon 97124 USA
and
Derrick Duehren (503) 696-4299, fax (503) 696-4904
Derrick_Duehren@ccm.jf.intel.com
Intel Program Manager
Subject: Minutes from IBIS Open Forum Ratification Meeting 6/9/94
To:
Anacad Steffen Rochel*
Ansoft Henri Maramis
Atmel Corporation Dan Terry
Cadence Design Sandeep Khanna*, C. Kumar*
Cadlab Ralf Bruning*
Contec Maah Sango
Digital Equipment Corp. Barry Katz*
High Design Technology Michael Smith, Dr. Ing. Cosso*
HyperLynx Kellee Crisafulli*
IBM Jay Diepenbrock, Joseph Flanigan*
IBM-Motorola alliance Lynn Warriner, Hoa Quoc, John Burnett
Integrated Silicon Systems Eric Bracken*
Integrity Engineering Greg Doyle
Intel Corporation Stephen Peters*, Don Telian, Will Hobbs*
Arpad Muranyi*, Derrick Duehren*,
John Keifer, Robin Rosenbaum
Interconnectix, Inc. Bob Ross*, Rick Maiero*
Intergraph Ian Dodd, David Wiens
IntuSoft Charles Hymowitz
Mentor Graphics Ravender Goyal
Meta-Software Mei Wong, You-Pang Wei, John Sliney*
NEC Hiroshi Matsumoto
MicroSim Arthur Wong
National Semiconductor Syed Huq
North Carolina State U. Steve Lipa
OptEM Engineering, Inc. Benny Leveille*, Ken Ehn*
Quad Design Jon Powell*
Quantic Labs Mike Ventham
Racal-Redac John Berrie
Siemens Nixdorf Werner Rissiek, Olaf Rethmeier,
Torsten Maeser*
Symmetry Martin Walker*
Synopsys, Logic Modeling G. Randy Harr*
Texas Instruments Bob Ward*
Thomson-CSF/SCTF Jean Lebrun
UniCAD Canada Ltd. Stephen Lum
Zeelan Technology George Opsahl, Hiro Moriyasu*
CC:
Intel Corporation Randy Wilhelm, Jerry Budelman,
Intel IBIS team
In the list above, attendees at the meeting are indicated by *
Upcoming Meetings: The room and bridge numbers for future IBIS teleconferences
are listed below:
Date Bridge Number Reservation #
6/24/94 (916) 356-9999 328519
All meetings are 8:00 AM to 10:00 AM PDT (15:00 to 17:00 UTC). 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.
If you know of someone new who wants to join the e-mail reflector
(ibis@vhdl.org) send e-mail to ibis-request@vhdl.org.
NOTE: "AR" = Action Required.
------------------------------------------------------------------------
6/9/94 Summit Proposed Meeting Agenda
-------------------------------------
Opening Remarks
Agenda Review
Review Voting Process
Short Intro/Overview Discussion of Rev 2.0
Ratification
Levels of Support
Lunch
Golden Parser Discussion
Future Open Forum , Affiliation, Standards, and Funding/Membership
Increasing Participation Discussion/Getting Vendors to Provide Models
IBIS Cookbook
Future Technical Direction (Rev 3.0)
Timing Information within IBIS
IBIS into Pinnacles/SGML (Randy Harr)
Press Release
Opens
1. Opening Remarks
Will Hobbs presented opening remarks, including a brief overview of IBIS and the
forum.
Will announced that Paul Munsey has reviewed the proposed 2.0 spec. He found "a
couple of minor things" per a voice-mail message.
Eric Bracken of Performance Signal Integrity announced that PSI had been bought
by Integrated Silicon Systems.
2. Agenda Review
Increasing Participation Discussion/Getting Vendors to Provide Models
IBIS Cookbook
Press Release
Syed: Should technical questions be posted to the reflector? Yes.
3. Review Voting Process
Agreed on previously agreed process (reference meeting minutes...)
4. Short Intro/Overview Discussion of Rev 2.0
5. Rev 2.0 Ratification
The Rev 2_0.X2 draft spec. that was published to the IBIS reflector on or about
June 1, 1994 was unanimously ratified with changes noted. The approved and
updated Rev 2.0 spec. has been posted to the /ibis directory of vhdl.org as
VER2_0.TXT. Stephen Peter's change notes are in the same directory
(VER2_0RN.TXT).
No changes other than syntactical changes required by the Golden Parser and
possibly levels-of-support changes will be made for Rev 2.1.
One key clarification occurred in the ramp rate spec. Several people had
interpreted the ramp rate, which is of the form [3.2V]/[2.1nS], as a reducible
fraction, defining only a slope. In fact, the number represents three pieces of
information: the slope, the voltage spanning the middle 60% (80% - 20%) of the
difference between the steady state DC high and low output voltage levels, and
the time it takes to traverse that particular 60% of the range.
6. Levels of Support
Levels of support were discussed at length, with the idea that 2.0 had enough
new functionality that it might be too much for new EDA vendors to take on,
acting as a deterrent to them supporting IBIS at all. We found this to be an
issue with strongly held opinions both ways, so we chose to table the discussion
for the IBIS reflector and future phone conferences.
7. Golden Parser Discussion
The forum agreed that the IBIS spec. is no longer assumed to be parsable.
We are contracting the original "Golden Parser" engineer, Paul Munsey, to write
a new golden parser for 2.0, and fully expect some minor changes to the spec. to
occur during this process. Our goal is for this work to be completed by some
time in August, at which time we will issue a new press release and the EDA
vendors will release new simulators with 2.0 functionality.
Jon Powell presented the following list of suggested coding-standard changes to
the Golden Parser. These changes will make the parser easier to use and port.
1. struct IBIS*IBIS_CHK(inf)
file *inf;
2. structure to be dynamically allocated.
3. All data except comments are to be retained in structure.
4. main code to be built around IBIS_CHK call.
5. structure to be freeable.
6. main.c \
+ | not meant to imply actual names
other.c /
Intent:
.C file structure designed to be placed into other programs
7. ANSI C standards
8. Jon Powell to supply Vec_test model.
9. No globals
10. IBIS_Free() to be defined
11. DOS flag for case insensitive argument read
12. Numbers to be "double" and count all units --> 9ns --> 9e-9 as in
the IBIS spec.
Paul Munsey to take this input and the text at the end of the Rev 2_0.X2 draft.
[Sent to Paul 6/20/94]
Check for voltage range, issue a warning if it does not meet the spec.
8. Future Open Forum Structure, Affiliation, Standards, and
Funding/Membership
We discussed the future form of the IBIS Open Forum organization, and agreed to
continue this discussion in coming meetings, with the standards organization
information factored in.
Randy Harr discussed the pros and cons of IEEE and EIA (Electronic Industry
Association) groups. The committee decided to pursue EIA affiliation as a first
choice.
AR Randy H: Try to get EIA (Electronic Industry Association) rep to participate
in upcoming meeting.
The idea on the table is to seek affiliation after Rev 2.1.
9. Increasing Participation/Getting Vendors to Provide Models
We discussed ways to increase participation and model availability for IBIS. TI
indicated they were on the verge of officially embracing IBIS, and National
Semiconductor said they were just waiting on 2.0.
AR Kellee: Contact Xilinx to see if they will publish models created by
HyperLynx
Five keys to increased model availability and participation were identified:
A. Publish the cookbook as it is now
Syed H: It is difficult to create models from measurement. Is there any
cookbook information? Arpad offered some suggestions.
The Cookbook is underway, and will be released soon. Syed Huq of NSC indicated
he would add his experiences to the cookbook later this summer, so this will
likely be a gradually improving how-to guide.
AR Stephen/Arpad, add Arpad's measurement tips to the cookbook.
B. Publish press releases
We decided to wait for 2.1 for our press release.
C. Publish IBIS articles
Several magazine article ideas were discussed, and Derrick will pursue getting
the overview article he adapted from our IBIS Overview document published, and
Bob Ward of TI indicated he would write a technical article on IBIS.
AR Derrick: Complete the overview article and get it published. Add
Spice-to-IBIS conversion utility and a 2.0 discussion/compatibility.
UPDATE: EDN has accepted the article for publication sometime this year.
AR Jon : See if a note can be posted to vhdl.org saying something to the effect
of "PPC IBIS models are available under non-disclosure agreement".
D. Affiliate with a standards organization
We discussed standards organization affiliation. Randy Harr of LMG gave us an
overview of EIA, EIA-J, IEEE and other standards bodies, and basically said that
IEEE is expensive to join, proceeds very slowly, and that EIA and IEEE offer
basically the same standards legitimacy world-wide. Randy agreed to invite
someone from EIA to our next Open Forum meeting to discuss their organization
with us.
E. Spice-to-IBIS translation program tested and in use
Steve Lipa of North Carolina State University is still working on the Spice to
IBIS converter. He was at the Birds of a Feather session, and gave us a
progress update-- not done, but making good headway.
F. Possibly sponsor one-day IBIS-creation training seminar.
G. Publish IBIS notices on vhdl.org that advertise the existence of IBIS
models from vendors, including non-public models.
10. IBIS Cookbook
Previously discussed.
11. Future Technical Direction (Rev 3.0)
A checksum keyword is needed in the next rev to help identify any alterations to
an "official" IBIS file.
12. Timing information within IBIS
13. IBIS into Pinnacles/SGML (Randy Harr)
Randy told of his experiences turning the DIE spec. into SGML format. It was
wholly rejected by the die-spec. committee. Bottom-line, it does not provide
sufficient advantages. See pub/die/workshop3 on vhdl.org.
14. Opens
Randy Harr described work being done by the die-spec. committee. Data-sheet
level data is level zero (optional). See pub/die/workshop4 directory on
vhdl.org.
========================================================================
Notes from IBIS Birds of a Feather DAC Session 6/8/94:
Attendees:
Aspect Development Kenneth Belanger
Cadence Design C. Kumar
Digital Equipment Corp. Barry Katz
HyperLynx Kellee Crisafulli
Intel Corporation Stephen Peters, Will Hobbs
Arpad Muranyi, Derrick Duehren,
Interconnectix, Inc. Bob Ross, Rick Maiero
Intergraph Walter Katz, Rob Kelley
Integrated Silicon Systems Eric Bracken
Meta-Software Bill Guthrei, Les Spruiell
National Semiconductor Syed Huq
Nikkei Electronics Bus Pub. Ikutaro Kojima
North Carolina State U. Paul Fraazer
Synopsys, Logic Modeling G. Randy Harr
Texas Instruments Bob Ward
Vantage Analysis Systems Francoise Martinolle
Zeelan Technology Hiro Moriyasu
------------------------------------------------------------------------
Will Hobbs began the meeting with a historical and technical overview of IBIS.
The open discussion focused on model availability and possible affiliation with
a standards organization. A number of ideas were offered to increase the
profile and "legitimacy" of IBIS, which were again discussed at the Thursday
session.
Ideas logged:
o We need to contact the DAC program committee and propose a Signal
Integrity/IBIS tutorial at next year's DAC
o A tutorial-type article in ASIC and EDA magazine is needed. Bob Ward
volunteered to work on this article.
o Randy Harr shared the levels of support used by the Die Information
Exchange standard:
Level 0 = Data book info.
Level 1 = Includes sim test and IBIS Ver 1.1 data
Level 2 = Includes very specific data such as lot-specific data
o Private (non-public) IBIS models exist. We agreed that to increase
exposure for these models, vendors wanting to sell their IBIS models
can post announcement-type ads on vhdl.org. Send your text file to
Derrick_Duehren@ccm.jf.intel.com. Derrick will create a subdirectory
for your company in the /models directory and post your file.
For example, a company (such as Zeelan Tech.) might post a listing
of IBIS models for sale, with appropriate contact information.
Received on Mon Jun 20 14:45:49 1994
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