(Amended 2/17/99 to move Philips Semiconductor to a 1998 Voting Member) 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, [Greg Edlund] 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, [Hoang Nguyen] Motorola (Ron Werner) National Semiconductor Cheng-Yang Kao, John Goldie, Ikchang Song, Milt Schwartz, [Syed Huq] North East Systems Associates Edward Sayre, Kathy Breda, Michael Baxter, (NESA) Jon Green, Jinhua Chen NEC (Hiroshi Matsumoto) Philips Semiconductor Todd Andersen 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 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: http://www.eia.org Check the pub/ibis directory on eda.org for more information on previous discussions and results. You can get on via FTP anonymous. ==============================================================================