DATE: July 23, 1996 SUBJECT: 7/19/96 EIA IBIS Open Forum Minutes VOTING MEMBERS AND 1996 PARTICIPANTS LIST: AMP Hank Herrmann*, Tim Minnick*, Russ Moser 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 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 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 8/16/96 (916) 356-9200 2-88344 6838524 9/6/96 (916) 356-9200 2-88345 4511183 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 Hrish Patel joined for the first time from VLSI Technology to become familiar with IBIS, since he will be working on IBIS models. EIA MEMBERSHIP AND TREASURER'S REPORT Patti Rusher's June 30, 1996 report shows $10,468. Several thousand dollars of DAC meeting and other item expenses are expected to show up in the July 31, 1996 report. Invoices are still being tracked for DEC and Veribest memberships. (After the meeting: Veribest has paid and is now a Voting Member.) MINUTES REPORT, MISC. No change. All AR's have been dealt with. MISCELLANY/ANNOUNCEMENTS Jon Powell has agreed to handle the system administrative aspect of the IBIS vhdl.org account (Membership additions, deletions, response to problems, questions, and posting material) while Bob Ross is on vacation August 1 through August 13. PRESS AND WEB PAGE UPDATES Syed Huq plans to add links in the EIA/IBIS home page to public IBIS model databases that Jon Powell provided. Jon has checked this out and they appear good. (Patti Rusher reports over 2500 hits on the EIA/IBIS home page.) AR - Syed Huq activate links to Jon Powell's page from EIA/IBIS Home page. Jon Powell has requested that anyone who knows of additional IBIS models available on Web sites to forward information to him. (Late news - Brian Johnson of Micron Technology reports that Micron models are available on http://www.micron.com/cgi-bin/model. A one-time registration is required; no password or username is needed.) NEW MODELS The new 200 MHz PentiumPro model files have been put in the Intel directory, replacing the previous models. Jon Powell reports receiving a pending Intel directory update from Michael Steer. Jon will work with Arpad on current contents. Anyone else who has updated information should work with Jon. OPENS FOR NEW ISSUES Stephen Peters - Prague Conference Report Bob Ross - Secretary Position Bob Ross - Specification Enhancements Discussion IEC EXPRESS FUNDING PROGRESS Patti Rusher reports further progress in helping fund an IBIS Express model needed for IEC progress. DARPA funding should go to US organizations. EIA itself cannot accept funding, but an auxiliary corporation "Electronic Industries Service Corporation" may be able to accept and distribute money. Patti needs to gather all of the standards funding requests including items from DIE into one comprehensive proposal. She plans to draft a proposal in the next two weeks for legal review. EE TIMES ARTICLE EE Times has requested through Patti Rusher an IBIS article for the Sept. 2 issue signal-integrity special report. Bob Ross, Jon Powell and Syed Huq are working on the article. The article will be basic, but will provide more emphasis on IBIS model sources and utilities than in other overview articles. SECRETARY Bob Ross followed up on the need for the IBIS Secretary position to be filled. Stephen Peters suggested that the duties by split up. Bob stated that the primary need is still to produce the minutes. Several people already help out taking notes. Bob will handle this aspect of the Secretary position until someone else volunteers. PRAGUE CONFERENCE Stephen Peters and Will Hobbs attended a European CAD Standards Conference from July 6 - 12, 1996. They presented "Applying Standards to Increase Model Availability - Two Case Studies, IBIS and OMF". They took the model supplier point of view. HDL, AVHDL, Vital and OMF generated the most interest. They also had a opportunity to discuss Express funding with Hilary Kahn. The cost estimates remain the same. EDIF REVIEW Bob Ross reports he is working with Alan Williams of the University of Manchester concerning reporting passive R, L, C element values to simulators, per the IBIS Committee technical comment. BIRD34.1 - STORED CHARGE EFFECT Bob Ross summarized the primary assumptions that the proposed transit time format is similar to the Spice TT diode parameter and that the clamping diodes produce the major effect in the clamping regions. D.C. Sessions stated that many clamping diodes are MOS, not bipolar. He is investigating the significance of this difference. So the voltage dependent capacitor may be appropriate to support all technologies. Further discussion is expected on BIRD34.1. AR - Anyone with information on stored charge effects in MOS devices provide it to D.C. Sessions. BIRD35.1 - MULTI-STAGED OUTPUTS Bob Ross summarized the [Rising Sequence] and [Falling Sequence] tables. Jon Powell reviewed the revised syntax and suggests further simplification based on calling stages by Model name. This avoids introducing the numbered table extensions in Bob's proposal. One concern is to truly isolate those subparameters which apply for the combined model, versus those that apply to the individual stage. The "master driver" could still be used to capture all models and parameters and sequencing in one area to avoid scattering the information throughout a .ibs file. Stephen Peters suggested a composite [Rising Waveform] and [Falling Waveform] be provided. Jon stated, that if this were done, it would be for checking only since it contains less information than the detail needed by individual stages. AR - Bob Ross work with Jon Powell concerning syntax changes and produce BIRD35.2. BIRD36 - ELECTRICAL BOARD DESCRIPTION Since Stephen Peters had just returned, discussion on this was deferred. Bob Ross commented that he had talked with and agreed with Hank Herrmann on most of the points that Hank had raised. One point of disagreement regarded putting an actual (large) size limit on the number of external pins. BIRD37 - ENHANCEMENT OT THE PACKAGE MODEL SPECIFICATION Bob Ross asked whether it was ready for vote. Jon Powell suggested that votes on BIRDs be announced in the agenda since there are a number of technical issues to review. Bob wanted to check that new FORK term did not use the "/" terminator, reserved only for the "Len .... /" syntax. Hank Herrmann suggested the NC addition. However, same functionality is provided using "Len = 0 /" null element. Bob suggested that BIRD37 include the approved BIRD28.3 example and add the FORK subparameter to fully illustrate the syntax extension. AR - Stephen Peters provide an upgraded BIRD37.1 which addresses these concerns for vote at the next meeting. BIRD38 (EGG11) - ABSOLUTE MAXIMUM VOLTAGE Jon Fitzpatrick was not present, so discussion was deferred. Bob Ross felt that this is a very complex specification BIRD needing further discussion. The extensions would definitely be optional. EGG10 - PARSER ADDITIONS FOR NUMERICAL CHECKING Bob Ross acknowledged getting the statistical data from Chris Rokusek concerning IBIS parameters on models stored on vhdl.org. Chris now needs to examine this and provide proposed values for the parser tests 1-5. AR - Chris Rokusek propose tests and test limit values. Stephen Peters asked whether these tests would be for Version 3.0. Bob indicated that this has not been decided. They could also be an upgrade to ibischk2. Some comparison tests should be very easy. Others such as those that test compatibility of V/T table voltages with V/I tables could require computational work. SERIES RESISTOR Arpad Muranyi discussed further the series element ideas. It could be a controlled 3-terminal device with a set of tables, similar to transistor device characterizations. One of the major needs is for "Quick Switch" (e.g., CBT technology from Texas Instruments) devices which can connect or disconnect paths. The MOS on path may be 1 to 10 ohms, but there may be additional analog characteristics. Current electrical simulators do not include digital control logic, so Jon Powell felt the focus should be more on 2-terminal series elements with, perhaps, a 3.3 V and 5 V mode. Series elements can include diodes, resistors, EMI filters, etc. So, some form of I/V tables may still be needed. The devices could also be modeled with an off and an on state. Currently there is no IBIS support in this area. The only EDA vendor support uses their own syntax. While the Electrical Board Extensions could be used, a direct, simpler method is more appropriate. AR - Arpad Muranyi provide a proposal in order to continue this as an agenda item. SPECIFICATION PARAMETER ENHANCEMENTS Bob Ross indicated that BIRD38 dealt with Specification data similar to Vinh and Vinl and not electrical characterization data. There have been a number of requests for specification parameters, and such extensions are on the priority list for Version 3.0. Bob asked for ideas. Ahmed Omer stated that an input delta-time limit is needed for the input thresholds to assure maximum energy limits are not exceeded. AR - Ahmed Omer make a proposal for dealing with these energy limit. Bob added hystersis thresholds, CMOS style input thresholds that are a percentage of Vcc, and overshoot (high and low) limits are possible additions. On both the input and output sides, the reference points for signal integrity and timing measurements can be at the DIE or at the PAD for different applications. Also, timing references may be at the PAD, but signal integrity references may be at the DIE for standard devices, but at the PAD for ASICs. Jon Powell suggested that a committee similar to the package committee be formed off-line to collect the parameters. Bob Ross plans to initiate a proposal. NEXT MEETING: The next meeting is on Friday, August 16, 1996, 8:00 A.M. to 9:55 A.M., four weeks from now because of some conflicting commitments. BIRD37.1 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. ==============================================================================