DATE: 9/15/03 SUBJECT: September 12, 2003 EIA IBIS Open Forum Meeting Minutes VOTING MEMBERS AND 2003 PARTICIPANTS LIST: Ansoft Corporation (Eric Bracken) Apple Computer Kim Helliwell Applied Simulation Technology Fred Balistreri Cadence Design Lynne Green*, Lance Wang Cisco Systems Syed Huq, Michael LaBonte, Val Mandruson, Hung Pham, Todd Westerhoff Fairchild Semiconductor (Graham Connolly) Hitachi ULSI Systems Kazuyoshi Shoji Intel Corporation Stephen Peters*, Michael Mirmak*, Arpad Muranyi*, Eric Magnusson LSI Logic Frank Gasparik Matsushita (Panasonic) Atsuji Ito Mentor Graphics [Bob Ross], Ian Dodd, Guy de Burgh*, John Angulo*, Mike Donnelly, Weston Beal Micron Technology Randy Wolff* Molex Incorporated Gus Panella Motorola (Rick Kingen) National Semiconductor [Milt Schwartz], [Tim Coyle] NEC Electric Corporation (Itsuki Yamada) Philips Semiconductor (D.C. Sessions), Stephanie Goedecke Siemens (& Automotive) AG Eckhard Lenski*, Michael Kindij, Burkhard Muller, Katja Koller, Andre Goerisch, Manfred Maurer, Bernard Unger, Amir Motamedi, Hartmut Ibowski, Gerald Bannert Signal Integrity Software Bob Haller, Barry Katz, Doug Burns Sigrity [Raj Raghuram] Synopsys Warren Wong, Edmund Cheng Texas Instruments Thomas Fisher Teraspeed Scott McMorrow, Tom Dagostino, Kevin Simpson, Bob Ross* Time Domain Analysis Systems Dima Smolyansky, Steve Corey Zuken (& Incases) Michael Schaeder, Ralf Bruening OTHER PARTICIPANTS IN 2003: Agilent Technologies Herbert Lage Brocade Frank Yuan, Yongrue Yu Conexant Gary Felker EADS CCR Alix de la Villeguerin EFM Ekkehard Miersch EMC Corporation Brian Arsenault, John Fernandez, Simba Julian Fraunhofer IZM Ege Engin Fujitsu Tadashi Arai GEIA (Chris Denham) Huawei Technologies (Jiang Xiang Zhong) Independent Kelly Green, Luca Giacotto Infineon Tech AG Christian Sporrer Marvell Semiconductor Itzik Peleg NetLogic Microsystems Eric Hsu North East Systems Associates Edward Sayre North Carolina State Univ. Ambrish Varma* Plexus Joseph Socha Politechnico de Torino Igor Stievano Qlogic Larry Barnes Sintecs BV Hans Klos, Bob te Nijenhuis SiQual (Rob Hinz) Sun Microsystems Tim Coyle Via Technologies (Weber Chuang) 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 October 3, 2003 1-916-356-2663 2 643-9661 All meetings are 8:00 AM to 9:55 AM Pacific Time. Meeting agendas are typically distributed seven days before each Open Forum. Minutes are typically distributed within seven days of the corresponding meeting. When calling into the meeting, provide the reservation number and passcode at the automated prompts. If asked by an operator, please request to join the IBIS Open Forum hosted by Michael Mirmak. NOTE: "AR" = Action Required. -------------------------------- MINUTES ----------------------------------- INTRODUCTIONS AND MEETING QUORUM No new participants. CALL FOR PATENTS Michael Mirmak called for any patents or pending patents related to the IBIS Version 4.0, 4.1 or ICM specifications. No patents were declared. MEMBERSHIP UPDATE AND TREASURER'S REPORT Michael Mirmak reported that membership remains at 25 organizations, with a twenty-sixth member in processing. One invoice for membership is still in processing. REVIEW OF MINUTES AND AR'S The August 22, 2003 meeting minutes were approved without objection. MISCELLANY/ANNOUNCEMENTS No new announcements. PRESS AND WEB PAGE UPDATES Bob Ross noted that Syed Huq has updated several links to presentations on the eigroup.org IBIS web site. NEW MODELS AVAILABLE, LIBRARY UPDATE No new models received. OPENS FOR NEW ISSUES No new issues. INTERNATIONAL/EXTERNAL PROGRESS - IEC 62014-3 (ICEM) Integrated Circuit Electromagnetic Model Proposal (formerly, IEC 93/67/NP IBIS and EMC Simulation) No update. - JEDEC Activity Report Lynne Green reported that she has been invited to present a one-day short course on IBIS and IBIS modeling during the JEDEX spring meeting. The URL for the JEDEC organization is http://www.jedec.org/. The JEDEX 2004 conference does not yet have its own URL. PCB EAST SUMMIT DISCUSSION Lynne Green has distributed the second call for papers to the PCB East IBIS Summit. Currently, three presentations are planned: the Chair's Report, a presentation from Sun's Timothy Coyle on their modeling efforts and a web page proposal, and an IBIS Quality Committee report from Robert Haller. Lynne Green may also present. Open Forum members are encouraged to contribute materials on any IBIS technical or administrative issue. Bob Ross suggested that, if more presentations are not forthcoming, the event may be reduced to one-half day. Michael Mirmak and Lynne Green also held a meeting with Kathy Breda of NESA to finalize all summit details. A room for about fifteen people is available at NESA's offices. Arrangements for an LCD projector, teleconference phone, light refreshments, and photocopying have been completed. NESA made several suggestions for potential luncheon arrangements, but sponsorship is still needed (see below). Michael also reported that a teleconference bridge and telephone number have been arranged for the summit, with details to be announced in the summit agenda. DESIGNCON 2004 SUMMIT DISCUSSION Michael Mirmak reported that a new agreement for IBIS Summit support has been received from the IEC. Discussions are planned in the immediate future regarding whether some of the complementary items may be traded for refreshments for the Summit participants. In addition, sponsors are needed for lunches at both PCB East and DesignCon 2004. Open Forum members and participants are encouraged to inquire at their organizations regarding co-sponsorship of the summit. Sponsors will be prominently mentioned in Summit presentations, announcements, and the minutes. IBIS VERSION 4.0 PARSER FUNDING AND STATUS Michael Mirmak reported that payment from one parser sponsor has still not yet been received by the GEIA. He will continue pursuing this. A beta version of IBISCHK4 is available for download: http://www.vhdl.org/pub/ibis/ibischk4_beta IBIS QUALITY COMMITTEE Lynne Green reported that meetings continue every two weeks, though the most recent meeting was cancelled. The next meeting is scheduled for September 23, 2003. IBIS MODEL REVIEW COMMITTEE Lynne Green reported that two new models, from Motorola and Maxim, have been received by the committee and have been distributed for review. S2IBIS3 Ambrish Varma and Bob Ross reported that work continues on S2IBIS3 development, especially on series elements. A new version is to be released within the next few weeks. S2IBIS3 beta executables can be downloaded from: http://www.ece.ncsu.edu/erl/ibis/s2ibis3/s2ibis3.htm Feedback on the current beta version is appreciated and encouraged. NEW ADMINISTRATIVE ISSUES No new issues. DRIVER SCHEDULE CLARIFICATION Arpad Muranyi introduced several new issues regarding the treatment of subparameters in scheduled models. Using the "Polarity" subparameter as an example, Arpad noted that the triggering polarity to be assumed by tools using models with [Driver Schedule] is unclear. John Angulo and Bob Ross both noted that the intent behind the specification was that top-level model subparameters should be observed, while subparameters in the scheduled models were to be ignored. In addition, the Polarity subparameter was to be completely ignored when used with [Driver Schedule]. Some mention of ignored and observed [Driver Schedule] keywords are mentioned in the IBIS specifications, but the list does not extend to all subparameters. Arpad took the AR to write a clarification BIRD to address the issue, so that the treatment of both keywords and subparameters is unambiguous. Additionally, Arpad observed that, in cases where only rising edge delays are described for [Driver Schedule] models, the timing sequence is unclear regarding falling edges. In "totem-pole" designs, for example, must the rising edge delay complete before any falling edge turns off the pullup? Whether the timing sequence or the actual input edges control the output is not obvious from the specification. Arpad will write a description of the issue for discussion on the IBIS reflector. Bob Ross suggested that any resolution to this issue in a BIRD not prevent adoption of IBIS 4.1 in a timely manner. Michael Mirmak mentioned that, in a fashion similar to the W3 Consortium's HTML 4.0 specification, the Open Forum may wish to consider using the term "deprecated" to describe keywords that are only mentioned for historical reasons in the IBIS specification. Finally, Arpad noted that the specifications do not clearly describe whether multiple [Submodel] calls may be made from a single [Model]. Bob Ross suggests that this is allowable, so long as the various [Submodel]s are of different type. An additional clarification BIRD may be required to address this issue. IBIS ICM SPECIFICATION REVIEW Michael Mirmak announced the final "reading" of the ICM specification and reviewed the changes proposed for the next revision. These are: - allow multiple unused model names under the [ICM Model List] keyword for use in multiple ICM model descriptions (from David Lieby, Acuson) - permit mixing RLGC and S-parameter data within a single model description (from Scott McMorrow, Teraspeed) - support for frequency dependent RLGC matrices (from Scott McMorrow, Teraspeed and Arpad Muranyi, Intel Corp.) - add explicit links between IBIS and ICM to one or both specifications (from Michael Mirmak, Intel Corp.) None of these represent a barrier to adoption of the current draft and may be resolved in the next ICM revision without great difficulty. No other comments or suggestions have been received or were offered during the meeting. Bob Ross and Michael both suggested that references to ICM within IBIS not be added to the IBIS specification until after version 4.1 is complete. Tools may use models under both specifications separately without cross-referencing the specifications. In addition, further issues may be revealed as the parser and actual product models are developed. Some concerns were raised regarding whether the Agilent Touchstone(TM) document written by the Open Forum required an approval vote. The Open Forum members agreed that, until further information was received from Agilent regarding the draft 1.2 document, no further action should be taken on approving the Agilent Touchstone(TM) document. A vote was called for approval of the ICM 1.0 draft. The document was approved by unanimous vote of the Open Forum members. Bob Ross noted that a final copy will be prepared that makes no changes to the content but which resolves some remaining formatting issues, adds a copyright statement, and includes the approval date. By acclamation, the final document will be called "icm_ver1_0.xxx" where "xxx" may be "txt", "pdf", or "doc" as appropriate to the distribution format. Michael accepted the AR to develop a BIRD process for ICM to address specification changes. He also will work with Bob Ross on an update to the IBIS web site to store ICM-related materials. CLARIFICATION BIRD DISCUSSION Michael Mirmak announced that a draft BIRD83 text is being written to resolve the series element issues mentioned in earlier Open Forum meetings. This text will be made available in time for review during the October 3 Open Forum meeting. Arpad Muranyi noted that, to address differential buffer behaviors, the [Series MOSFET] keyword may need to be expanded. At present, negative Vds values are not allowed, as the behavior of the device being described is assumed symmetrical around Vds=0. Based on work detailed at a recent IBIS Summit, Arpad suggests that negative values could be allowed in future IBIS models, so long as symmetry is assumed for models which use no negative values. Bob Ross reminded the Open Forum members of the assumptions behind the non-negative value treatment and also strongly suggested that any BIRD changing the treatment of [Series MOSFET]s not prevent approval of IBIS 4.1. IBIS VERSION 4.1 DISCUSSION John Angulo updated the Open Forum on his work in developing an expansion of the [Ramp] keyword, for use with the 4.1 multilingual extensions. At present, John favors keeping the [Ramp] keyword as a requirement, both of [Model] and [External Model]. This treatment is consistent with current IBIS usage and does not unduly burden [External Model]. Lynne Green suggested that the load resistance and termination voltage assumptions may need to be changed for use with [External Model], as differential buffers may not be appropriately represented by simulation into single-ended terminations. Arpad Muranyi mentioned that current-mode drivers may not observe [Ramp] requirements as they may not show voltage output variation under appropriate loading. John suggested that using a dV value of zero is technically legitimate and may allow [Ramp] to be used for timestep estimation in such cases. John will provide draft BIRD language for review on the IBIS Reflector. A draft version of IBIS version 4.1 is available on the web. Both an ASCII text and an Adobe PDF version are available at: http://www.vhdl.org/pub/ibis/wip/ IBISCHK4 & BUG TRACKING STATUS Due to time constraints, discussion was deferred until the next meeting. The beta version of IBISCHK4 is available at: http://www.vhdl.org/pub/ibis/ibischk4_beta BUG80 - [Model Selector] and [Diff Pin] Ordering Due to time constraints, discussion was deferred until the next meeting. NEXT MEETING: The next teleconference has been scheduled for October 3 from 8:00 AM to 10:00 AM Pacific Daylight Time. ============================================================================ NOTES IBIS CHAIR: Michael Mirmak (916) 356-4261, Fax: (916) 377-1046 michael.mirmak@intel.com Senior Analog Engineer, Intel Corporation M/S FM6-45 1900 Prairie City Rd. Folsom, CA 95630 VICE CHAIR: Lynne Green (425) 788-0412, Fax (425) 451-1871 lgreen@cadence.com Senior Modeling Engineer, Cadence Design Systems 320 120th Ave NE, Suite B-103, Bellevue, WA 98005-3016 SECRETARY: Randy Wolff (208) 363-1764, Fax: (208) 368-3475 rrwolff@micron.com Simulation Engineer, Micron Technology, Inc. 8000 S. Federal Way Mail Stop: 1-711 Boise, ID 83707-0006 LIBRARIAN: Roy Leventhal (847) 590-9398 roy.leventhal@ieee.org Consultant, Leventhal Design and Communications 1924 North Burke Drive Arlington Heights, Illinois 60004 WEBMASTER: Syed Huq (408) 525-3399, Fax: (408) 526-5504 shuq@cisco.com Manager, Hardware Engineering, Cisco Systems 170 West Tasman Drive San Jose, CA 95134-1706 POSTMASTER: John Angulo (425) 497-5077, Fax: (425) 881-1008 John_angulo@mentor.com Development Engineer, Mentor Graphics 14715 N.E. 95th Street, Suite 200 Redmond, WA 98052 This meeting was conducted in accordance with the EIA Legal Guides and EIA Manual of Organization and Procedure. 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