DATE: 4/7/98
SUBJECT: 4/3/98 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
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
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
April 24, 1998 (916) 356-9200 5-32911 6784438
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 does not have the report, but she does not know of any new
members.
REVIEW OF MINUTES AND AR'S
The AR's will be discussed at the meeting. No corrections were noted on
the previous two sets of meeting Minutes.
MISCELLANY/ANNOUNCEMENTS
Bob Ross indicated that he still plans the Majordomo conversion when he has
time.
Bob stated that Syed Huq has requested roster updates. Arpad Muranyi asked
if they can still be given, and Bob said that they can be provided at any
time.
PRESS AND WEB PAGE UPDATES
Bob Ross noted that the article "Free Board Tools Spun for Web" in the
Electronic Engineering Times, March 30, 1998, pg. 92 discusses the free
IBIS model development utility from Cadence.
Bob also reported that two side-bar articles in Electronic Engineering Times,
"Crosstalk-analysis Tools Roll at PCB Confab" and "Designers Clamor for
Better IBIS Models" are on pages 73 and 74 in the March 23, 1998 issue both
mention IBIS.
Finally, Bob reported that Arpad Muranyi is teaching a session on "Signal
Integrity in High-Speed CMOS Circuits" and is including IBIS Model discussion
in a tutorial short course: Circuit Simulation and Signal Integrity in
Micro electronic Circuits and Systems from the University of Arizona in
Scottsdale, Arizona, May 4-6, 1998.
NEW MODELS AVAILABLE, LIBRARY UPDATE
Bob Ross noted that Cadence has announced its free s2ibis development utility
and viewer and it is downloadable the location below (click on free
software):
http://www.cadence.com/software/pcb_info.html
It is a very large .zip file. The utility is configured with a windows
interface to run on Solaris OS machines.
Bob noted that TI clock driver IBIS models now exist at:
http://www.ti.com/sc/docs/msp/cdc/app_supp.htm
Bob reported that the Motorola URL mentioned by Matthew Flora at the last
meeting has entries for several technologies. Currently IBIS models exist
for the LCX technology. Matthew had submitted the link later as:
http://mot2.indirect.com/models/bin/logic_ic.html
The IBIS models that should be stored in Word Format (.doc) which then can
be converted to a text format as a .ibs file. If you try to store the files
directly as text files, they will appear to be corrupted with binary
characters.
Bob noted that Jon Powell restored the had IBIS models page link from the
IBIS home page which had inadvertently been deleted by the web page provider.
OPENS FOR NEW ISSUES
Syed Huq on compressing the ibischk executables
(Discussed in the ibischk2.115 discussion)
Bob Ross on the Design Automation Conference Summit meeting.
(Not directly discussed)
INTERNATIONAL/EXTERNAL PROGRESS
- IEC 62014-1 (IBIS Version 2.1) - Patti Rusher still has not heard on the
status. It may not be resolved until the next IEC meeting in September.
- EIAJ III (I/O Interface Model for ICs) - Raj Raghuram reported that he
has a preliminary copy of the Version 1.1 English translation. Bob Ross
reported that Hideki Fukuda still expects to create a web site soon which
will contain this document and other information for downloading.
- IEC 93/67/NP IBIS and EMC Simulation - Jean-Claude Perrin, Chair of the
task force gave this report. Jean-Claude first noted that the official
minutes of the February 27, 1998 meeting had pages 2 and 3 interchanged.
A meeting was held on March 30, 1998. Its purpose was to refine the
proposal to be submitted to the next IEC meeting in September, 1998. The
proposal still contains an internal equivalent model square pulse generator
representing a clock along with some internal coupling impedances to the
pins/power supplies of the device. The plan is to follow the IBIS model
conventions but be formatted in a separate file such with a .emc extension.
However, the extensions would be compatible with the corresponding .ibs
Component in the IBIS file. Jean-Claude briefly covered additional details
such as capacitance on supplies, through currents, and variable coupling
impedances.
Jean-Claude asked whether the IBIS format supports the short circuit current
between power rails that may exist when output devices change state. Bob
Ross reported that the IBIS format only supports this as a consequence of
whatever algorithm is employed during transition. BIRD42.3, still under
consideration, actually can be used to format such currents. So EMC
extensions could also be a consideration for supporting BIRD42.3 within
the .ibs or possibly the .emc format.
Jean-Claude indicated that the task force is preparing a revision for
submission and will be sending a copy to Bob. Bob questioned whether
this copy could be submitted to the IBIS reflector for general review and
comments, and Jean-Claude affirmed that this was permitted. (Note: so
Bob will plan to make the document available for review whenever it is
received - either by email or by uploading it in an area where interested
people can download it for review. Jean-Claude will welcome comments.)
- JC-16B - Bob Ross started the discussion by indicating that a joint IBIS
Summit meeting in December, 1998 with the JEDEC JC-16B sub-committee had
been proposed at the March 13, 1998 IBIS Open Forum. This meeting would be
held in place of the DesignCon IBIS Summit meeting planned for January,
1999. Bob indicated that he supported holding a joint meeting. However,
Bob also felt the DesignCon IBIS Summit Meeting was valuable and should
not be dropped. D.C. Sessions commented that he would have liked to see
more "chalk-board" issue resolution at the IBIS Summit meeting rather than
just presentations. Bob responded that this has occurred in the past. The
format of the IBIS Summit meetings are not fixed. Some past IBIS Summit
meetings have been held with topics devoted to issues and have also
involved some small sub-group meetings beforehand to develop and present
some agreed upon proposals.
Bob questioned D.C. on what he had in mind for the joint meeting - its
purpose and how it would be structured. For example, do the IBIS folks
participate in the JC-16B meeting, and the JC-16B folks participate in the
IBIS Summit as observers? D.C. mentioned that what he had in mind was to
co-locate a meeting where it was convenient for some cross-fertilization
particularly between the device developer members of the JC-16B committee
and the EDA tool developer members of the IBIS Open Forum. Bob and others
felt that this was a good reason to hold such a meeting. Bob also stated
that the meeting did not have to be structured on just presentations. The
IBIS Summit Meeting might focus on a few application topics of mutual
interest. One such topic might be IBIS models for SSTL (Series Stub
Terminated Logic) - a topic originating from JC-16B. (Other topics could
included IBIS models for other technologies considered by JC-16B.)
Bob asked for the dates, and Patti Rusher indicated that she has already
booked hotel and conference space in San Diego for the December 7-9, 1998
time frame for JEDEC. The JC-16B meeting typically covers one-half day
and a JC-42 meeting on Memories also typically covers one-half day and
is attended by many JC-16B members. These occur typically on Tuesday, so
the plan is to add a room reservation for the an IBIS Summit Meeting the
following day. Patti indicated that She will reserve Wednesday, December
9, 1998. (Note after the meeting - the dates were not clear, but the
intent is to hold the IBIS Summit meeting the day after the JC-16B and
JC-42 meetings.)
Bob asked who was going to pay for this. Patti indicated that this could
come out of the EIA IBIS funds. Bob also indicated that others might want
to serve as sponsor or co-sponsor hosts. In particular, Viewlogic might
be interested since the meeting is being held nearby. Chris Rokusek will
check if Viewlogic is interested.
IBIS LOGO CHANGE
Bob Ross introduced the topic by noting that the EIA (Electronic Industries
Association) has now changed its historical lightning-bold circular logo
to a new rectangular logo, and EIA now stands for Electronic Industries
Alliance. Patti Rusher indicated that this change was due to an expanded
scope of EIA incorporating more organizations under the EIA umbrella. As
indicated from the revised Web page - still under revision, EIA now consists
of the following organizations:
Consumer Electronics Manufactures Association (CEMA),
Electronic Components, Assemblies Equipment & Supplies Association (ECA),
Telecommunications Industry Association (TIA),
Electronic Information Group (EIG) - where Patti is a director and under
which the IBIS Open Forum and other organizations are positioned,
Government Electronics & Information Technology Association (GEIA),
JEDEC Solid State Products Technology Division, and
Electronic Industries Foundation (EIF).
Since the old EIA logo is embedded within the IBIS Spoken Here!! logo (or
placard), the IBIS logo is now retired. Patti wants to work with a graphics
artist to develop quickly a new IBIS logo in time for the Design Automation
Conference.
Bob and others indicated that they liked the original logo with the scarlet
IBIS birds, the IBIS Spoken Here!! and the EIA logo within. However the
square logo does not fit as well. So the committee is open to considering
changes. A general discussion occurred. Bob questioned whether the EIA
logo included a black outline, and Patti indicated no. Patti indicated that
a few other organization are also revising their logos.
Stephen Peters expressed interest in reviewing logo designs. So Bob formed
a committee consisting of the IBIS officers (Stephen Peters as the main
contact, and Syed Huq, Jon Powell, and Bob) to review logo ideas.) Patti
would go ahead and get ideas from the graphics artist. Bob also stated that
anyone else interested is welcome to join or submit logo ideas. Bob noted
that he will also ask people who are using the old logo to start phasing them
out.
IBIS EAST USERS GROUP ACTIVITIES
Bob reported that Greg Edlund issued the minutes on the ibis-users reflector
for the Accuracy sub-group meeting held on March 26, 1998. The next Accuracy
sub-group meeting is scheduled on Thursday, April 30, 2998.
Bob also expects the minutes of the March 19, 1998 IBIS (East) Users Group to
be issued soon.
EDITING COMMITTEE
Bob Ross indicated that he upload an UNOFFICIAL IBIS ver3_1b.ibs document on
eda.org under /pub/ibis/wip. It contained only minor editorial revisions
and the correction to [End Board Description] nomenclature.
Later under the BIRD48 discussion, Chris Rokusek thought it would be helpful
to have a tree diagram to show the context of the IBIS keywords and
subparameters. Bob indicated that one already existed under the wip
directory. This had been originally contributed by Atsushi Ogawa of NEC
Corporation, who is serving as Vice-Chair of the EIAJ III sub-group. Bob
had recently updated the tree diagram to put [Model Selector] at the top
level along with [Component] and [Model] within a file in response to a
comment from Atul Agarwal, who is implementing the ibischk3 parser. So,
tree3_0a.txt is now current.
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 2.115) PROGRESS
Syed Huq indicated that he had problems downloading the ibischk2+ executables
using Netscape since Netscape would try to execute rather than save the
executables. (This is not a problem using the anonymous FTP access.) Syed
proposed that the executables be compressed. D.C. Sessions provided two
Netscape workarounds: (1) click Shift, and left key on mouse before doing
the save, and (2) change the Options - General Preference - Helpers to take
out any .exe helper application.
Bob Ross and others indicated that regardless of these solutions, it probably
was more efficient to put just compressed files that were intended for
downloading - .Z or .gz for Unix, and .zip for DOS Windows applications.
This would not be difficult for the existing ibischk2+ executables. So Bob
will plan to do this.
As separate item, Bob asked Matthew Flora and Chris Rokusek to continue
maintaining the ibischk2+ source code. In particular, keep putting in
the changes associated with the approved BUGs that are being discovered
and resolved in the ibischk3 project that relate to ibischk2_. Matthew and
Chris agreed to continue doing this in preparation for a future ibischk2+
Version 2.1.16 release.
BUG26 - Parser Crashes when Calling [Package Model]
Bob Ross reported that Atul Agarwal had issued BUG26 against ibischk2+ while
developing ibischk3, and Atul also provide the simple fix.
Bob classified this as Severe, High, Open, and intends that this fix be
rolled into ibischk2.1.16.
BUG25 - Keyword as First Word in [Notes] Causes Error
Bob Ross introduced BUG25 which was submitted by Arpad Muranyi. A discussion
followed as to whether this was really an error that could be fixed by
documenting a limitation, or whether the ibischk2+ (and ibischk3) parser
needed to be changed. Arpad Muranyi suggested a work around of putting
quotes around keywords that appear as the first word in a line under the
[Notes] keyword. Bob indicated that the problem applies to any keyword
such as [Copyright] which accepts multiple lines of text information. D.C.
Sessions favored documenting this as a BUG and considering a fix. While
BUG25 could be fixed, Bob noted that the error detection itself was a source
of ambiguity since a keyword not properly aligned to column 1 after the
[Notes] text would then be "correctly" included within the notes text. Only
after subsequent keyword checking would an error of a missing required
keyword be detected.
Bob classified BUG25 as ANNOYING, LOW, OPEN, and will investigate with Atul
Agarwal on a low priority basis a possible fix. However, the alternative
is still open - provide a documented limitation on using bracketed keywords
as the first word in text block lines.
VERSION 3.1 PARSER DEVELOPMENT
Atul Agarwal delivered Beta Versions 3.0.1 of the ibischk3 and ebdchk3
parsers and Matthew Flora distributed on March 30, 1998 the source code to
the twelve companies supporting the development. Some additional test cases
and test case results along with Windows DOS executables are included.
Stephen Peters will investigate if any .ebd test cases exist.
Everyone is welcome to try the parsers and to report back on any problems.
Bob Ross also needs to check on the status of the invoices that have been
issued.
COOKBOOK
Stephen Peters reports that there is progress on the Cookbook project. As
previously reported, individuals from the IBIS East Users group are writing
the testing and validation section.
IBIS MODEL REVIEW COMMITTEE DISCUSSION
Bob Ross asked Matthew Flora whether anyone has approached him regarding
reviewing IBIS models. Matthew indicated no. The model review committee
has been published in previous minutes. Bob will now just list Matthews
address as the contact for IBIS models review:
Matthew Flora, HyperLynx mbflora@hyperlynx.com
D.C. Sessions is still waiting for Bob to provide an FTP site to upload
VLSI IBIS models for review. Per VLSI policy, individuals who are want to
review VLSI IBIS models must contact D.C. directly with a letterhead letter
stating the request.
S2IBIS2
Matthew Flora reported that he had a question concerning the recently
released s2ibis2 for NT. Matthew was given the source code to test
the NT implementation. Bob Ross suggested Matthew work directly with
SiQual concerning how it can be released. One issue is that the examples
exist in a different file and are not included.
S2IBIS2 BUG1
Bob Ross reported that BUG1 was issued by Bernhard Unger dealing with the
problem that the HSPICE examples do not work. Bob indicated that this was
a known problem and was actually the subject of IBIS reflector discussions
a while ago. Suggestions regarding HSPICE convergence and adding some
parasitic resistance to the clamping structures were provided.
Bob classified BUG1 as ANNOYING, LOW, OPEN. The s2iibs2 Version 1.1 seems
to work with real IBIS models. However, anyone who is interested in
providing replacement HSPICE examples is welcome to contribute them. The
committee itself is too involved in other activities to develop new examples
at this time.
BIRD47 - REMOVE PIN NAME AS A SUBPARAMETER OF THE [Pin List] KEYWORD.
Bob Ross introduced BIRD47 by stating that it removed the technical
inconsistency associated with the pin_name subparameter defined under the
[Pin List] keyword in the Electrical Board Description section. BIRD47
removes the pin_name subparameter and also moves the signal_name subparameter
to the keyword line in a manner consistent with other pin-related keywords.
The sense of the committee at the March 13, 1998 meeting was to approve
BIRD47. The ebdchk3 parser should already use the BIRD47 syntax. Bob called
for a vote.
BIRD47 was approved unanimously with one abstention based on lack of
knowledge.
BIRD42.3 - MODELING CURRENT WAVEFORMS
Bob Ross indicated that we need to move on BIRD42.3. The original BIRD42
was introduced prior to the IBIS Version 3.0 ratification meeting in June,
1997. There were issues associated with BIRD42 and IBIS Version 3.0 was
issued with the understanding that BIRD42 could be considered further and
included in IBIS Version 3.1. While there has been little activity on
BIRD42.3, it was discussed during both the DesignCon IBIS Summit on
January 26, 1998 and the European IBIS Summit on February 26, 1998. Also,
as previously mentioned, BIRD42.3 may relate to some EMC concerns. BIRD42.3
will be scheduled for a discussion at a later meeting.
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.
BIRD48 - ADD MODEL
Bob Ross presented the background concerning BIRD48, BIRD49, and BIRD50. At
the IBIS Version 3.0 ratification meeting in June, 1997, the committee left
the door open for adding to IBIS Version 3.1 a dynamic clamp feature. BIRD45
and BIRD45.1 proposed dynamic clamps. In response to a comment, we wanted to
investigate further whether the [Driver Schedule] keyword could be used for
some added functionality.
On March 11, 1998, Bob met with Arpad Muranyi and Chris Reid to do this
investigation based on the intended functionality. After looking at some
of the aspects, the group moved toward a different, more general approach.
This approach allows future extensions and also allows reusing some of the
existing IBIS keywords in a parent-child relationship that is consistent
actual EDA tool implementation methodologies. Bob then took the action item
of producing the BIRDs that were needed for this functionality.
Based on some subsequent considerations, Bob just introduced BIRD48 for [Add
Model] to allow calling other [Model]s only if they are of specific
Model_types. The two Model_types are Dynamic_clamp and Bus_hold described
in BIRD49 and BIRD50, respectively. Furthermore, Bob opted to introduce the
[Add Model Spec] keyword to describe subparameters associated with these
added models. Normally the subparameters information is based on internal
knowledge that is not available in the data sheets. So Bob rejected using
the existing [Model Spec] keyword for this purpose. Under [Add Model Spec],
subparameters V_trigger_r and V_trigger_f describing the rising and falling
edge trigger voltages are introduced. The format allows for independent
typo-min-max column entries.
Bob indicated that the preparation of BIRD48, BIRD49, and BIRD50 evolved
while being written. He did introduce these BIRDs on Thursday, April
2, 1998, but expected to do more work on them. The notation is completely
open at this time. Also, there is still some unresolved functionality that
needs to be considered.
BIRD49 - ADD MODEL DYNAMIC CLAMPS
Bob Ross introduced BIRD49 to replace BIRD45.1. Along with the [Add Model]
call, Dynamic_clamp Model_type, the [Add Model Spec] trigger voltages,
BIRD49 introduces the [POWER Pulse Table] and [GND Pulse Table] to describe
the dynamic clamp shifting as a function of time. Unlike the BIRD45.1
approach, BIRD49 reuses the [GND Clamp] and [POWER Clamp] keywords. BIRD49
covers the same functionality as BIRD45.1 plus uses the typ-min-max
trigger voltages that had been discussed as an improvement to BIRD45.1.
A complete example is provided.
BIRD50 - ADD MODEL BUS HOLD
Bob Ross introduced BIRD50. It introduced only the Model_type Bus_hold.
Output keywords for [Pullup], [Pulldown], [Ramp], and even the [Rising
Waveform] and [Falling Waveform] tables could be used. While positioned
as contributing to bus hold modeling, the real reason was to deal with
some new latching mechanism architectures that are now being implemented.
An example is provided showing the Bus hold implementation.
Chris Rokusek commented that the [Add Model Spec] could be moved to the
same location as the [Add Model] keyword since it is associated with
information at the parent model level. Bob responded that this might be a
good idea, but it would then require independent trigger voltages for each
application. The trigger voltages were really a function of the added
model features.
BIRD45.1 - DYNAMIC CLAMPS
Because BIRD48 and BIRD49 are intended to replace BIRD45.1, Bob Ross will
schedule a formal vote on the rejection of BIRD45.1 at the next meeting.
TECHNICAL ISSUES ON THE IBIS REFLECTOR
In the few minutes that remained, Bob Ross indicated that there has been good
reflector discussion, both on the Signal Integrity reflector and the IBIS
reflectors. Bob also has three new issues he quickly summarized:
(1) We may need to add the 3-state_ECL Model_type. There exists several
such devices, and Bob cited the National Semiconductor 100316, a
low power quad differential line driver with cut-off, as one ECL
3-state example.
(2) We may need to consider extending the [Rising Waveform] and [Falling
Waveform] fixture loads to include a differential resistor. Some
technologies appear to require the physical or Spice differential
connection for proper extraction of IBIS information.
(3) Based on an e-mail from Jean-Christophe Pautrat (Hewlett Packard,
France) on the IBIS reflector, we may need to consider extending the
timing test load information and Vmeas into the typ-min-max format
under the [Model Spec] keyword. For example, the APG max timings are
specified with Cref = 10 pF and min timings are specified with Cref =
0 pf. Bob felt that we currently could use only one of the Cref values,
and extract a delta time value to modify the times for the other Cref
setting. However, all data values would need to be adjusted - a
potentially tedious process.
NEXT MEETING:
The next teleconference meeting is on Friday, April 24, 1998, 8:00 A.M. to
9:55 A.M. BIRD45.1 and BIRD46.1 are scheduled for votes.
==============================================================================
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.
"IBIS Spoken Here" placards are available from Jon Powell (jonp@qdt.com) for
use at trade shows.
==============================================================================
Received on Tue Apr 7 12:15:40 1998
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