DATE: July 11, 1997 SUBJECT: 7/11/97 EIA IBIS Open Forum Minutes VOTING MEMBERS AND 1997 PARTICIPANTS LIST: AMP Jeff Walden Applied Simulation Technology Dileep Divekar*, Norio Matsui, Raj Raghuram Cadence Design & UniCAD C. Kumar, Don Telian, Cameron Seitz Cypress Bruce Wenniger Digital Equipment Corp. Jeff Chu* High Design Technology (Razvan Ene) HyperLynx Kellee Crisafulli, Steve Kaufer INCASES Olaf Rethmeier, Werner Rissiek Intel Corporation Stephen Peters*, Arpad Muranyi*, Henry Maramis, Will Hobbs Interconnectix Bob Ross* Mitsubushi Tam Cao, Hoang Nguyen Motorola [Ahmed Omer], Michael Desiderio*, Paul Bolden*, Tom Myers* National Semiconductor Syed Huq, Cheng-Yang Kao, Mike Bristol, Peter Laflamme, Kevin Smith NCR Dave Moxley, Richard Mellitz NEC (Hiroshi Matsumoto) Quad Design/Viewlogic Jon Powell, Chris Rokusek, Peivand Tehrani Quantic EMC (Mike Ventham) Texas Instruments Thomas Fisher Thomson-CSF/SCTF (Jean LeBrun) VeriBest Ian Dodd*, William Bell VLSI Technology Harish Patel, D.C. Sessions OTHER PARTICIPANTS IN 1997: 3M Fran Hart Actel Scott Schlachter Acuson & Free Model Foundation Richard Munden Alcatel John Fitzpatrick Ansoft Eric Bogatin Apteq Design Systems Dan FitzPatrick Compaq Weston Beal, Mark Leonard EIA Patti Rusher EMC Fabrizio Zanella Hewlett Packard, EEsof Karl Kachigan, Henry Wu Hewlett Packard, France Jean-Christophe Pautrat* Hitachi Saburo Hojo, Yasushi Ogawa IBM Brad Herrman Interface Technology Dan Waterloo Micron Technology Brian Johnson Molex Gus Panella North Carolina State U. (Michael Steer) S3, Inc. Porsh Shih, Sarathy Sribhashyam Symmetry Andy Hughes TRW Ray Steele Ultratest International Charles Im* Zeelan Technology George Opsahl 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 August 8, 1997 (916) 356-9200 3-125343 4891173 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 Michael Desiderio, Program Manager for the Advanced Interconnect Systems Lab at Motorola, indicated that Motorola is investigating how to provide IBIS models. He is filling in for Ahmed Omera who has left. Group managers Paul Bolden and Tom Myers also joined in. Jean-Christophe Pautrat from Hewlett Packard, France is working with Intel processors on desktop PC projects and is interested in IBIS models. MEMBERSHIP UPDATE AND TREASURER'S REPORT Bob Ross reported that Patti Rusher submitted the ledger as of 5/31/97 of $9,433 after deducting some meeting expenses. Two companies have been removed from the Members list because no payment has been received. REVIEW OF MINUTES AND AR'S No Corrections. Stephen Peters reported on the AR's. The major outstanding ones are for examples for the Cookbook and BIRDs. Please see the cookbook discussion below MISCELLANY/ANNOUNCEMENTS Bob Ross announced that he will be on vacation starting Saturday, June 12 and should be returning Monday, August 4, 1997. The system administration duties will be handled by Stephen Peters and Syed Huq. Syed Huq should be returning from vacation on Monday, July 15, 1997. Stephen Peters is expecting to take off for two weeks after Friday, July 17 and will be returning August 4, 1997. PRESS AND WEB PAGE UPDATES Bob Ross reported that as a result of a press release by Patti Rusher, "IBIS 3.0 Gets Nod From EIA" appeared in EE Times, June 30, 1997, p. 14. Bob also reported that in EE Times, June 16, 1997, pg., 72, and article Pacific Numerix Fields EMI-Simulation Analysis Tool mentions using IBIS or Spice models. An article "Interconnect Synthesis Methodology" in the July 1997 issue of Printed Circuit Design, pp. 17-21 mentions IBIS. NEW MODELS AVAILABLE, LIBRARY UPDATE Bob Ross notes that these Web sites have added models: Cypress Semiconductor has added an All Octal FCT model Library (68 Components) for a total of about 102 components. The IDT download site has about 44 components plus another 11 that can be obtained from the local FAE. Bob also notes that an IBIS diode terminator model from California Micro Devices exits at: http:://www.calmicor.com/prod/spice/spice.htm Bob also notes that one can request IBIS models for SRAMS (DRAMS under construction) at http://sec.samsung.com/Products/sram/model_request.html Jeff Chu asked how one submits IBIS models. Bob Ross responded that they are submitted to the Librarian, Jon Powell (address at the end) and are checked out using ibis_chk and actual simulation for syntax correctness and to give feedback regarding results. A submission authorization form is available on the ibis FTP site under /pub/ibis/models. Some models on company Web Sites may not have gone through such checking and may have syntax flaws. OPENS FOR NEW ISSUES Bob Ross - On adding GND, POWER and NC reserved words to [Model Selector] choices. DESIGN AUTOMATION CONFERENCE (DAC) 1997 EIA BOOTH REPORT Bob Ross indicated from the previous report that the Booth reported good traffic and reprints of Syed Huq's December 1996 Article in Electronic Design: "Ease System Simulation With IBIS Device Models" were distributed. The IBIS poster at the Booth looked very nice and listed the participating companies. DESIGN AUTOMATION CONFERENCE (DAC) 1997 EIA/IBIS SUMMIT MEETING REPORT Bob Ross, reported that 28 people attended the nearly all day session. There were several interesting presentations in the morning. New EIA/IBIS officers were elected, and IBIS Version 3.0 was ratified. INTERNATIONAL PROGRESS - 93/46/NP (IBIS Version 2.1) - No Report. Expect about a two year process. - 93/60/NP (IBIS Models and EMC Simulation) - No Report. - EIAJ III (I/O Interface Model for ICs - Based on the presentations at the IBIS Summit, we expect another release in September along with a Package Committee release. EDITING COMMITTEE Stephen Peters reported on editing IBIS Version 3.0 for clarity. It could use a table of contents and a keyword list showing when keywords were introduced. Bob Ross added other possible improvements - section or chapter headings, consistency of words per some of the improvements suggested by Ogawa-san (Vice Chair of the EIAJ subcommittee), a tree diagram, a syntax, etc. In addition, some of the Cookbook points could be added into the Specification for clarity. BIRD44 to be discussed later also raises some editorial clarification points regarding min/max and fast/slow/strong/weak interpretations. A suggested process is for Bob and Stephen and anyone else who is interested to make a first cut at such improvements and put them as a pending Version 3.1 draft in the Work In Progress (wip) directory. One issue is whether we continue to use the text format (with crude graphics) or go with Word, HTML, Post Script, or some other format which will allow better graphics and presentation. Bob and Stephen favored at this time keeping the reference standard in the text format for maximum portability. However, we will consider this issue when some we do some of the editorial changes. A second issue is whether we hire (or use an internal resource) a technical writer. Stephen and Bob feel that we first need to make the initial editorial pass and maintain the historical context first before any major restructuring is considered. This issue will also be considered after the initial editorial review. Bob also indicated that the parser development project also served as an editorial review because some unclear items were revealed. Version 1.1 followed Version 1.0 and Version 2.1 along with letter ballot review followed Version 2.0 with parser development motivated improvements. AR - Bob Ross generate and post a BNF for IBIS Version 3.0 (and IBIS Version 3.0 ratification AR). VERSION 3.1 PARSER Bob Ross reported that Paul Munsey, who developed the ibis_chk and ibischk2 parsers essentially no-bid on the ibischk3 parser because he is still finishing the RAIL parser and is carring on full-time job/family responsibilities. He may be available for some of the work, but suggested that we consider other sources. Bob stated that there are two alternatives: Some internal company resource that can be dedicated to this project, or hire another contractor. Stephen Peters suggested that we ask on the reflector if someone is interested in bidding on the project or if someone can recommend a contractor who might be interested. AR - Stephen Peters put a message for parser development interest/bidding on the IBIS reflector. COOKBOOK Stephen Peters reported that he has received some review comments. However, he has not received any of the promised examples. The AR's (Action Required) for these examples are listed below. Some additions were made to the version of the cookbook handed out at DAC regarding recommended test loads for waveforms. Stephen can provide private copies, but is not ready to put it on the FTP site yet. Stephen also reported that based on an internal review, a primer on behavioral modeling is recommended. He has a writer who will be doing some work in this introduction section. The IBIS keywords will be illustrated in this context. AR - The following people have volunteered to supply examples Steve Kaufer/Hyperlynx -- Example 1 Arpad Muranyi - Example 2 Stephen Peters - Example 3 AR - D.C Sessions. Supply a paragraph or two explaining the best way to modify a SPICE transistor model to get realistic power and ground clamp information AR - Bob Ross. Supply the text for the section "Diode Transient Time Data" AR - Syed Huq. Review and expand (if necessary) Section 3.3. on "Obtaining I/V and Switching Information via Lab Measurement". AR - Bob Ross submit an example of a Series MOSFET component. AR - Everyone who received a copy review the document and provide comments to Stephen Peters (address at the end). S2IBIS2 ISSUES (& NT) Ian Dodd reported that VeriBest had withdrawn their s2ibis based on Version 1.1 s2ibis since it had other errors. VeriBest now has NT/Windows 95 versions of s2ibis_ver1.3 (for Version 1.1 of IBIS) and s2ibis_ver2.1 (for Version 2.1 of IBIS) compiled. In order to make them work with NT and Windows, they needed to deal with file loading problems and code order dependency syntax issues that compiled differently in Windows environments than in UNIX environments. Ian's concern is that the code is untested (there are no regression tests for UNIX versions available). He would like to make the versions available AS IS for users to use and test. VeriBest would make fixes and corrections on a time available basis. Bob Ross felt this was a good plan and VeriBest should put there files on the VeriBest Web site. There will be four zip files for source and executables for each s2ibis version. They will be in the location that the official EIA/IBIS Web page already points to. AR - Ian Dodd put s2ibis_ver1.3 and s2ibis_ver2.1 for Windows on the VeriBest Web site. BIRD42.3 - MODELING CURRENT WAVEFORMS Bob Ross stated that BIRD42.2 had been considered for Version 3.0, but it was too controversial to be included. It deals with describing power and ground current waveforms to assist in power integrity (ground and power bounce) and SSO (simultaneous switched outputs) detail and also may produce improved switching algorithm detail. An AR is still pending regarding discussion on this issue between D.C. Sessions and C. Kumar. Bob had issued BIRD42.3 to change the keyword syntax. This could be considered as a Version 3.1 technical addition if it is approved. Discussion will be deferred until next meeting. AR - D.C. Sessions and Kumar get together and provide an example showing where the rising and falling waveform tables do not result in correct results. BIRD44 - INTERPRETATION OF MIN/MAX/WEAK/STRONG DATA Bob Ross reported that Andy Ingraham of Digital Equipment Corporation had submitted BIRD44 as an editorial improvement to clarify the actual usage of the min and max columns for data. Bob felt that while it contained good material, an alternative might be an explanation section at the beginning of the standard. There already is a large base of models and utilities (s2ibis) which use the existing min/max column headings and terms. BIRD44 will continue to remain open for further discussion. We may want to consider how to resolve it after we do the first pass on the editorial cleanup of IBIS Version 3.0. SWITCHING TERMINATORS Arpad Muranyi has no further work in this area to report. This also could be considered a Version 3.1 technical extension if a BIRD for this functionality is issued and approved. MODEL SELECTOR HANDING OF RESERVED WORDS Bob Ross introduced briefly that there had been a question regarding whether GND, POWER, and NC could be included as [Model Selector] choices. Arpad questioned the need. Bob stated that the Terminator models could be used for similar functions, especially NC. This will be considered further as part of the editorial review to propose clarification of this issue. (A BIRD may need to be issued.) FINAL ITEMS Because of holidays and people being on vacation, the next teleconferencing meeting was scheduled on Friday, August 8, 1997. NEXT MEETING: The next meeting is on Friday, August 8, 1997, 8:00 A.M. to 9:55 A.M. ============================================================================== NOTES IBIS CHAIR: Bob Ross (503) 603-2523, Fax (503) 639-3469 bob@icx.com Modeling Engineer, Interconnectix 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 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, Quad Design/Viewlogic 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@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. Job posting information is not permitted. 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. Job posting information is not permitted. 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. "IBIS Spoken Here" placards are available from Jon Powell (jonp@qdt.com) for use at trade shows. ==============================================================================