DATE: August 16, 1995 SUBJECT: 8/11/95 EIA IBIS Open Forum Meeting Minutes VOTING MEMBERS: AT&T Global Info Solutions Dave Moxley* Cadence Design Sandeep Khanna, C. Kumar* Contec CAE, Ltd. Dileep Divekar* HyperLynx Kellee Crisafulli IBM Jay Diepenbrock INCASES Werner Rissiek, Olaf Rethmeier* Intel Corporation Stephen Peters*, Will Hobbs*, Arpad Muranyi*, Derrick Duehren Interconnectix, Inc. Bob Ross* Meta-Software Les Spruiell, Mei Wong, You-Pang Wei, John Sliney Motorola Ron Werner National Semiconductor Syed Huq*, Atul Agarwal, Cheng-Yang Kao NEC Hiroshi Matsumoto Quad Design Jon Powell* Quantic Labs Mike Ventham Texas Instruments Roger Cline*, Ben Andresen* Thomson-CSF/SCTF Jean LeBrun UniCAD Canada Ltd. Stephen Lum VLSI Technology Dick Ulmer, Sung Oh Zuken-Redac John Berrie OTHER PARTICIPANTS: ARPA Randy Harr Anacad Steffen Rochel Ansoft Henri Maramis Atmel Corporation Dan Terry Cadlab Ralf Bruning Digital Equipment Corp. Barry Katz EIA Patti Rusher High Design Technology Michael Smith, Dr. Ing. Cosso Hewlett Packard Tom Langdorf, Karl Kachigan, Henry Wu Integrated Silicon Systems Eric Bracken Intergraph Ian Dodd, David Wiens, Walter Katz IntuSoft Charles Hymowitz LSI Logic Corp. Satish Pratadneni Mentor Graphics Ravender Goyal, Greg Doyle Micron Technology Brian Johnson MicroSim Arthur Wong North Carolina State U. Steve Lipa, Michael Steer OptEM Engineering, Inc. Benny Leveille, Ken Ehn Pacific Numerix Paul K. U. Wang Symmetry Martin Walker Synopsys, Logic Modeling G. Bill Lattin Univ. of Illinois, Urbana Raj Mittra* Zeelan Technology George Opsahl, Hiro Moriyasu (Independent) Bob Ward In the list above, attendees at the meeting are indicated by *. Upcoming Meetings: The bridge numbers for future IBIS teleconferences are as follows: Date Bridge Number Reservation # Passcode 8/25/95 (916) 356-9200 1-13824 8492193 9/15/95 (916) 356-9200 1-16347 127231 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, ANNOUNCEMENTS Ben Andresen and Roger Cline joined as new Texas Representatives from an I/O group in Dallas and are seeking addition representation from the Design Automation group. Dr. Raj Mittra joined later from the Univerity of Illinois to participate in the package model discussion MINUTES REPORT, MISC. Minutes of 7/21/95 to correct repeated "command" under s2ibis 2.1. OPENS FOR NEW ISSUES The cmosttl issue (Egg 6) was put on the list. PRESS UPDATES A Japanese publication Nikkei Electronics (similar to EDN) has published an extensive article on signal integrity including prominent mention of IBIS in the July 31, 1995 issue, pp. 171-184. Will Hobbs supplied IBIS information for the article and is having it translated into English. NEW MODELS Arpad Muranyi updated the entire Intel Chipsets library and has supplied and has supplied some new models including some under "nda" to Michael Steer. EIA MEMBERSHIP AND TREASURER'S REPORT IBM and VLSI have officially become members and have purchased the parser. Tanner Research, Inc. has purchased the parser. A treasurer's report was not available. EIA BALLOT COMMENTS (VOTES) To date, all ballots with comments are being addressed. There are no known negative ballots. The known comments and responses were discussed. The response to Interconnectix, Inc. editorial comments were approved. The response to the University of Manchester editorial and technical comments were approved. AR - Will Hobbs submit the approved response letters to the commentors. AR - Bob Ross roll the changes into a revised Version 2.1 Specification including those of the EIA IBIS committee BIRD29.2 response. Send this rolled up version with changes noted to reflector for discussion at the August 25 IBIS Open Forum Meeting for final ratification discussion. Bob also set up the Agenda to include this topic. Response to Comments by Dileep Divekar of Contec submitted on the reflector were considered satisfactory. These will not be submitted as formal letter ballot comments. Reminder, the Deadline for Comments to EIA-656 is August 22, 1995. AR - Those who have not commented, submit your comment to EIA. A strong showing of support is helpful. LOGO PERMISSION LETTERS Jon Powell needs permission letters from each company to use logos on placards and foils. Not everyone has received the letter from EIA. Jon has received permission letters and logos from National Semiconductor, UniCad, and Quad Design, and has received logos only from Contec and Zuken-Redac. Permission letters can be obtained from Patti Rusher at prusher@eia.org and returned to her. Company logos should be sent to Jon Powell - Email and address at the end. ROSTER UPDATE Based on responses, the roster has been updated. The roster is maintained on vhdl.org and continuously updated as new information arrives. Periodically a request will be made for everyone to review their company's entry and provide update information. AR - Bob Ross put the updated roster on vhdl.org [DONE] and send to the reflector the roster.txt along with a request to review the changes and submit updates and corrections. [DONE] WEB UPDATE Syed Huq reported that the IBIS Web page under EIA (www.eia.org/eng) is expected to be operational August 18 (at the earliest). Search links to "ibis" or to "EIA-656" are not in place yet. Syed will follow up on this. The home page will have a hypertext link to /pub/ibis on vhdl.org to connect to the top level of all posted information. Links will also be to - All models at the /pub/ibis/models - All Standards with links to ver1.0, ver1.1, ver2.0, ver2.1 - Roster Listing The FAQ (Frequently Asked Questions) will be maintained on the Web and will be entered as approved. Also, comments/problems/suggestions selections will be provided. Jon Powell suggested links to companies' IBIS pages. Names could be entered now, and company logos entered later. This could be pursued later. FAQ VOTE Except for Questions 6, 7, and 17, all were approved as written or per posted modification. The answer to Q1 was modified to read "IBIS (Input Output Buffer Information) is a method of providing the Input/Output device characteristics through V/I data without disclosing any circuit process information. It can be thought of as a behavioral modeling specification suitable for transmission line simulation of digital systems and applicable to most digital components." The answer to Q2 was modified to read "... All model files must pass the parser before a model can be released to vhdl.org. ..." Other changes have been submitted to the reflector. Q6 regarding SSO needs rewording. Q7 regarding -VCC to 2Vcc regarding data needed for undershoot and overshoot needs to be resubmitted. Ben Andresen of Texas Instruments raised the point that such a range is destructive to forward biased diodes. Will Hobbs' Q17 regarding non-monotonic data was incomplete. Jon Powell indicated that more information was required for the model to be simulate properly in the non-monotonic regions. AR - Jon Powell post a response to Q17 on the reflector - [Done]. Further discussion on Q6, Q7, and Q17 will occur on the reflector, and these will be on the agenda for next meeting. MODEL TRACKING Syed Huq reported no progress in this area. MODELS UNDER NDA NDA style models including those from National should be listed in the 00readme file and also should exist by name with an extension such as .nda. Information on whom to contact should be provided. GOLDEN PARSER UPDATE Arpad Muranyi has a "final" version of the parser, although it has a reference to "Beta". There is also some residual files on the disk. The disk is being sent to Will Hobbs for distribution. This should be (hopefully) the final validation check before the executables are generated and posted on vhdl.org. AR - Arpad Muranyi check with Paul Munsey on extra files. AR - Will Hobbs distribute new parser files to licensees [DONE] S2IBIS 1.2 A correction/enhansement release has been posted on vhdl.org as S2IBIS12.*. This version corrects for an incorrect extrapolation problem involving the [Pullup] table. It also adds several parameters including one which will allow separate "min" of slow-weak, "typ" or nominal, and "max" or strong-fast Spice used for these columns. S2IBIS 2.1 Michael Steer reported on the s2ibis version 2.0 progress through Email. C. Kumar reported August 24 as the target date. The contents would be posted on vhdl.org where anyone who wants to review it can get access to it. This will be a beta version, but this process will avoid attempting to distribute it privately. COOKBOOK AND OVERVIEW UPDATE Bob Ross indicated that Kellee Chrisafulli and Bob received the cleansed document from Syed Huq of the National Semiconductor cookbook for developing IBIS models based on measurements. AR - Syed can send Bob a Framemaker formatted version for conversion to Word. BIRD27 NEW KEYWORD FOR DIFFERENTIAL I/O This will be deferred until after the EIA IBIS ballot is completed since this is a Version 3.0 issue for the future. AR - Bob Ross submit BIRD27.1 (after EIA IBIS ballot resolution) BIRD28.1 PACKAGE MODEL EXTENSION / PHYSICAL EXTENSIONS Steven Peters summarized the issue and indicated that actual length should be included for each pin. It is up the the simulator companies to process this information. Stephen still plans to submit a BIRD28.2 revision. Arpad Muranyi has summitted on the reflector a summary of Raj Mittra's comments, and Raj Mittra from the University of Illinois, Urbana joined the discussion. He indicated that the Pads format seems to be favored, but it is not a standard. Raj indicated the preference for Spice style syntax by simulator vendors, particularly for transmission lines. Jon Powell indicated that several vendors can handle coupled transmission line segments directly. There is a distinction between transmission lines that exist on well defined ground planes versus package and bond wire routing. Raj gave these fundamental sources for package models: (1) Derivable from measurements (could be a bundle of pins within power/ ground groupings (2) For EMI modeling tools a PEEC (partial equivalent electrical circuit) is used as a good approximation using smaller quivalent lumped sections. (3) S-parameter extraction. Any model should relate to the above. These processes assume defining beforehand the ground/power pins and terminating the other (in-between) pins appropriately to extract the parameters. This whole issue is subject to more technical discussion in which Raj is invited to participate. AR - Stephen Peters submit BIRD28.2 and also supply Raj Mittra directly with any graphical information for review at rmittra@decwa.ece.uiuc.edu. AR - Bob Ross add Dr. Mittra to reflector - [Done] PIN PROGRAMMABLE BUFFER STRENGTHS Arpad Muranyi submitted BIRD30 proposing a [Multiple Model] keyword. Discussion will occur on the reflector. One quick comment was that if the buffers have selections from different power rails (e.g., a 3.3V buffer and a 5V buffer), there may be some interaction with the [Pin Mapping] keyword which defines the connectivity of groupings of power and gnd rails to various buffer models. TTL DRIVERS Egg 6 has been started from Jon Powell, but there was no time for discussion. NEXT MEETING: It is set on Friday, August 25 1995. Final Ratification of EIA IBIS response to comments is expected. ============================================================================== NOTES IBIS CHAIR: Will Hobbs (503) 264-4369, Fax (503) 264-4210 will_hobbs@ccm.jf.intel.com Modeling Manager, Intel Corp. 2111 NE 28th M/S JF1-57, Hillsboro, OR 97124 USA VICE CHAIR: Jon Powell (805) 988-8250, Fax: (805) 988-8259 jonp@qdt.com 1385 Del Norte Rd., Camarillo, CA 93010 SECRETARY: Bob Ross (503) 603-2523, fax (503) 639-3469 bob@icx.com 10220 SW Nimbus Ave, K4, Portland, OR 97223 To become a voting member of the EIA IBIS Open Forum, send email to ibis-info@vhdl.org for instructions. If you want to join the e-mail reflector (ibis@vhdl.org), send e-mail to the IBIS secretary at ibis-request@vhdl.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 email 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. ==============================================================================