DATE: September 10, 1996 SUBJECT: 9/6/96 EIA IBIS Open Forum Minutes VOTING MEMBERS AND 1996 PARTICIPANTS LIST: AMP Hank Herrmann*, Tim Minnick, Russ Moser, Ray Ziesse* Cadence Design C. Kumar* Contec CAE, Ltd. Dileep Divekar*, Norio Matsui, Antonis Orphanou Cypress Bruce Wenniger Hewlett Packard, EEsof Karl Kachigan, Henry Wu HyperLynx Kellee Crisafulli INCASES Olaf Rethmeier*, Ralf Bruening Intel Corporation Stephen Peters*, Will Hobbs, Arpad Muranyi*, John Keifer, Aaron Tang, Duane Quiet, [Donald Telian], Jim Kruchowski Interconnectix, Inc. Bob Ross*, Chris Reid Meta-Software (Sanjay Gangal) Mitsubushi Tam Cao, Hoang Nguyen Motorola Ahmed Omer* National Semiconductor Syed Huq*, Donald Snyder, Chune-Sin Yeh, Bill Aronson NCR (formerly ATT-GIS) Dave Moxley, Richard Mellitz NEC (Hiroshi Matsumoto), Quad Design Jon Powell*, Chris Rokusek* Quantic Laboratories (Mike Ventham) Texas Instruments Roger Cline, Ben Andresen, Sri Jandhyala, Tareq Shahwan, Dan Phipps Thomson-CSF/SCTF (Jean LeBrun) UniCAD Canada Ltd. Celso Faia Veribest Ian Dodd, David Wiens VLSI Technology Dick Ulmer, Sung Oh*, Swami Gangadharan, Daniel Kim, Tom Dockery, D.C. Sessions*, Hrish Patel* Zuken-Redac (John Berrie) OTHER PARTICIPANTS IN 1996: Alcatel John Fitzpatrick* Altera Vadim von Brzeski Apteq Design System Dan FitzPatrick Compaq Mark Leonard Digital Equipment Corp. Jeff Chu* EIA Patti Rusher IC Works Eric Chen Mentor Graphics Kim Owen* Micron Technology Brian Johnson MicroSim Ralph Perez Molex Gus Panella* North Carolina State U. (Michael Steer) Oki Semiconductor Tom Chao Philips Semiconductor Mike Magdaluyo Rockwell Collins Thomas Thurman S3, Inc. Sarathy Sribhashyam, Phap Duong Seimans Nixdorf Arnaud Lacariere Symmetry Andy Hughes Tektronix, Inc. Brock Hannibal TRW & Free Model Foundation Robert Harrison VTC, Inc. Bob Ward Zeelan Technology George Opsahl In the list above, attendees at the meeting are indicated by *. Principle members or other active members who have not attended are in parentheses. Participants who have joined another organization are in square brackets. Upcoming Meetings: The bridge numbers for future IBIS teleconferences are as follows: Date Bridge Number Reservation # Passcode 9/27/96 (916) 356-9200 3-54604 9558683 10/18/96 (916) 356-9200 3-54605 8249548 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 Ray Ziesse of AMP joined to get familiar with the committee. Eventually he will be taking over representation from Hank Herrmann. Kim Owen of Mentor Graphics is involved with model support and his main concern is model availability. EIA MEMBERSHIP AND TREASURER'S REPORT Bob Ross reported that Veribest joined per minutes correction below, and Quantic Laboratories is listed again as a member since the payment issue has been resolved. Bob received the July report which shows $9,285 after DAC expenses. The June report was $10,468. The August report is not yet available. MINUTES REPORT, MISC. No corrections were reported, but the following two corrections have been made to the July 19, 1996 minutes per e-mail communication: Ian Dodd reported that Veribest was changed to full voting member status because payment had been received. Patti Rusher corrected "EIA Server Corp" to "Electronic Industries Service Corporation" and stated she said she expected a draft proposal in two weeks instead of next week regarding DARPA funding. All AR's have been completed with the exception that Bob Ross has not issued BIRD35.2. MISCELLANY/ANNOUNCEMENTS None. PRESS UPDATES Syed Huq reported "SPICE and IBIS Modeling Kits The Basis for Signal Integrity Analysis" by Roland H.G. Cuny in the EMC: Silicon to Systems Symposium Record by the IEEE EMC Society, 1996. In Electronic Engineering Times, September 2, 1996, four articles mention IBIS: (1) "Part 3: Physical Design EDA TOOLS", Richard Goering, pg. 41. (2) "Workstation Board Pushes SI Envelope", Alex Pappas and Phil Treen, pg. 46. (3) "Signal-integrity Tools Deliver for MP Servers", Richard Mellitz and David Moxley, pg. 48. (4) "IBIS Standard Provides I/O Buffer Models", Bob Ross, Syed Huq, and Jon Powell, pg. 52. WEB PAGE UPDATES Jon Powell reported adding links from the official EIA/IBIS Home page to publicly available IBIS models. He requests people to report new sites and any out of date or better links. Jon updates the page weekly. (Not reported - the EIA site also links to the contacts.txt document which also gets updated regularly.) Bob Ross reported that Quality Semiconductor has IBIS Models on http://www.qualitysemi.com/devices.htm The Micron link was changed to the site reported at the last meeting, and the Model Request Form link appears inactive. Syed Huq looked into URL promotion on www.submit-it or www.postmaster of the EIA/IBIS website. Both locations support various search engines, but require a fee. Jon suggested to try Alta Vista or Yahoo which he thinks does not require a fee. The sense of the Committee is not to pay for registration. NEW MODELS Bob Ross reported that Motorola has some Fast SRAM models available via e-mail and Motorola also plans to put them on a Web page. OPENS FOR NEW ISSUES Hank Herrmann - AMP patent Bob Ross - EDIF 4 0 0 Bob Ross - Design SuperCon97 AMP PATENT Hank Herrmann alerted the EIA/IBIS Committee regarding a patent held by AMP: AMP holds a patent that relates to the current IBIS work on coupled multi-line connector models (BIRD36: Electrical Board Description). It covers the process of using a coupled multi-line connector model with a simulator in order to optimize the wiring configuration of the interconnection. Hank advises anyone interested to obtain a copy and review it. The patent specifics are as follows: Patent # 5,081,602 Title: Computer Simulator for Electrical Connectors Inventor: Douglas W. Glover Assignee: AMP Incorporated Hank adds that AMP Incorporated has not yet decided on their position regarding this patent. A position statement is owed to the IBIS Open Forum. If there are any questions regarding this patent, they should be directed to: Mr. Bruce Wolstoncroft The Whitaker Corporation Phone: (302) 633-2745 EIA/JAPAN - IBIS WORKING GROUP Jon Powell reported that EIAJ appears to be attempting to form a group for a new standard. They want one that includes SSO and coupled packaging effects. IEC EXPRESS FUNDING PROGRESS No report. IBIS Version 2.1 has been forwarded to IEC. EE TIMES ARTICLE As Bob Ross noted, above the Electrical Engineering Times article on IBIS has been published. The IBIS committee officers served as the co-authors on on behalf of the committee, but Bob wishes to thank C. Kumar, Stephen Peters and Patti Rusher for providing review and feedback. AR - Bob Ross seek permission (if necessary) and post to submitted draft text of the EE Times article on vhdl.org. EDIF 4 0 0 Bob Ross reported that Alan Williams of the University of Manchester provided the syntax for inclusion of IBIS models and for reporting passive R, L, C element values to simulators, per the official IBIS Committee technical comment. Bob concurred with the proposed syntax, and Alan Williams has forwarded EDIF 4 0 0 to EIA. DESIGN SUPERCON97 Bob Ross asked whether we should plan for a face-to-face meeting with Design SuperCon97 in San Jose at the end of January. Last year, it worked well to have the meeting on Monday prior to Design SuperCon96. The consensus was yes. Syed Huq indicated that National Semiconductor would be glad to host the meeting again. Other companies can also volunteer to host the meeting. Bob indicated that the IBIS Committee could probably assist in the funding. S2IBIS2 Per ibis-users reflector discussion, Syed Huq noted that s2ibis version 2.091 had a different syntax than s2ibis version 1.3, and he had some questions. He received a several public and private responses. Syed proposed compiling a list of workarounds. He feels more complete documentation is needed. Meanwhile, he is still relying on s2ibis Version 1.3 BIRD37.1 - ENHANCEMENT OT THE PACKAGE MODEL SPECIFICATION Bob Ross moved the BIRD37.1 discussion next since it was being considered for vote. Bob and Stephen Peters reaffirmed that it was a technical extension to the already approved BIRD28.3 to add Begin Fork and End Fork syntax for "stubs" in packages. Jon Powell cautioned that while he did not object to BIRD37.1, we should understand the technical limitations of this extension with respect to coupling. C. Kumar also felt that the single line extension was useful, but felt that the coupling mechanism did not support SSO effects because the matrices were not constructed to take this into consideration. Furthermore, the format may not support processing for SSO. Bob and others did not fully understand nor agree with the technical nature of this objection since detailed technical discussion is difficult during conference telephone meetings. Kumar also advocated a simpler and less ambitious goal consistent with "first order" modeling including limiting the number of stages. Hank Herrmann indicated that properly extracted global matrices can be processed, and algorithms exist to reduce them for single line processing. Hank also indicated that as a result of symmetrical matrix assumptions, analysis information was available for coupling. Technical discussions continued. Since we traditionally have accepted technical BIRDs by unanimous vote, we decided not to vote on BIRD37.1. Bob stated that there have been no publicly reported models that have coupled matrices (per IBIS Version 2.1), nor coupled matrix sections (per BIRD28.3). The committee recommended that BIRD37.2 be produced to remove reference to coupled matrix sections (while still containing the single coupled matrix for Version 2.1 compatibility). The single line extensions were viewed as important. Bob noted that the approval of such a modification to BIRD37.2 would supersede the matrix section extensions approved in BIRD28.3. AR - Stephen Peters provide BIRD37.2 which removes the matrix section portions of BIRD37.1 while still maintaining compatibility with Version 2.1. BIRD36 - ELECTRICAL BOARD DESCRIPTION Because of the relationship with BIRD37.1, Bob Ross moved the discussion of BIRD36 next. Stephen Peters questioned whether we were still bound by the matrix coupling mechanisms described in BIRD36 (which are identical to BIRD37.1). Without detailed discussions, the coupling mechanisms could be revisited. Gus Panella suggested that nodal syntax be considered. Bob indicated that this was a valid suggestion, but cut the discussion off since the topic has been extensively discussed, and it would consume valuable time to re-open the discussion here. Bob indicated that BIRD36 could also be applied to complicated, single packages, filling in for the functionality dropped in the future BIRD37.2. Bob also noted that the Committee really has three choices with respect to the coupling issue: (1) come to a consensus with respect to a coupled matrix extension, (2) do nothing with respect to coupling and let the simulator companies deal with coupling using their own, unique approaches, i.e., chose not to extend the Standard in this direction at this time, and (3) provide an alternative proposal which reaches consensus. Hank Herrmann inquired whether comments since June had been included. Stephen Peters noted that there was no general objection to the comments. Bob noted that since BIRD36.1 has not been issued, the comments have not formally been included. BIRD34.1 - STORED CHARGE EFFECT Bob Ross reaffirmed that the proposed TT mechanism was intended only to provide a first order method to mimic a known stored charge effect. An alternative is to provide a capacitance versus voltage table so that the format is in place for future effects as technology evolves. Bob felt this is too detailed for the intended application, would be too cumbersome to populate thereby rendering it as a virtually useless extension, and would be inconsistent with some simplifying assumptions already embedded within the IBIS model architecture regarding where a the series resistance is modeled. Dileep Divekar added that such a table would could be in error because of the conservation of charge issues related to how algorithms would be forced to process this information. Dileep noted that the proposed TT parameter allowed ways to process this information while preserving conservation of charge. D.C. Sessions inquired whether the TT parameter was intended just for the entire dynamic voltage range. Bob intended it to be used just for the clamping regions. Because BIRD34.1 has been out for quite a while with no formal objections nor counter proposals, we plan to vote on it at the next meeting. BIRD35.1 - MULTI-STAGED OUTPUTS Bob Ross just received Jon Powell's sample syntax and intends to produce BIRD35.2 to be consistent with the IBIS syntax and conventions and supportive of Jon's application. This may not be done by next meeting. AR - Bob Ross produce BIRD35.2. BIRD38 - ABSOLUTE MAXIMUM VOLTAGE AND EGG12 - SPECIFICATION ADDITIONS As time ran out Bob Ross followed up on Jon Powell's previous suggestion to set up a committee to handle all specification enhancement issues off-line. Members consist of John Fitzpatrick, Ahmed Omer, Jon Powell, and Bob. Anyone else can join. A telephone conference meeting was scheduled on Tuesday, September 24, 1996 at 8 A.M.. AR - Bob Ross set up telephone conference meeting and notify committee members of details. [Done] Date Bridge Number Reservation # Passcode 9/24/96 (916) 356-9200 3-54603 8565793 EGG10 - PARSER ADDITIONS FOR NUMERICAL CHECKING No discussion. NEXT MEETING: The next meeting is on Friday, September 27, 1996, 8:00 A.M. to 9:55 A.M. BIRD34.1 is scheduled for vote. ============================================================================== NOTES IBIS CHAIR: Bob Ross (503) 603-2523, Fax (503) 639-3469 bob@icx.com Modeling Engineer, Interconnectix, Inc. 10220 SW Nimbus Ave, K4, Portland, OR 97223 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 LIBRARIAN: Jon Powell (805) 988-8250, Fax: (805) 988-8259 jonp@qdt.com Transmission-Line Products Manager, Quad Design 1385 Del Norte Rd., Camarillo, CA 93010 SECRETARY: Vacant 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@vhdl.org To join, change, or drop from either the IBIS Open Forum Reflector (ibis@vhdl.org), the IBIS Users' Group Reflector (ibis-users@vhdl.org) or both. State your request. ibis-info@vhdl.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@vhdl.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. ibis-users@vhdl.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. ibischk-bug@vhdl.org To report ibischk2 parser bugs. The Bug Report Form Resides on vhdl.org in /pub/ibis/bugs/bugform.txt along with reported bugs. 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 vhdl.org for more information on previous discussions and results. You can get on via ftp anonymous, "guest" login from telnet or dial-in (415-335-0110), or send an e-mail request to the automatic archive server, archive@vhdl.org. "IBIS Spoken Here" placards are available from Jon Powell (jonp@qdt.com) for use at trade shows. ==============================================================================