DATE: May 21, 1996 SUBJECT: 5/17/96 EIA IBIS Open Forum Minutes VOTING MEMBERS AND 1996 PARTICIPANTS LIST: AMP Hank Herrmann*, Tim Minnick* Cadence Design C. Kumar* Contec CAE, Ltd. Dileep Divekar*, Norio Matsui Cypress Bruce Wenniger Hewlett Packard, EEsof Karl Kachigan, Henry Wu HyperLynx Kellee Crisafulli* INCASES Olaf Rethmeier Intel Corporation Stephen Peters*, Will Hobbs*, Arpad Muranyi*, John Keifer, Aaron Tang, Duane Quiet, Donald Telian, Jim Kruchowski Interconnectix, Inc. Bob Ross* Meta-Software (Les Spruiell) Mitsubushi Tam Cao Motorola Ahmed Omer* National Semiconductor Syed Huq*, Donald Snyder, Chune-Sin Yeh NCR (formerly ATT-GIS) Dave Moxley*, Richard Mellitz NEC (Hiroshi Matsumoto), Quad Design Jon Powell*, Chris Rokusek* Quantic Labs (Mike Ventham) Tanner Research, Inc. (Scott Wedge) Texas Instruments Roger Cline, Ben Andresen, Sri Jandhyala, Tareq Shahwan, Dan Phipps Thomson-CSF/SCTF (Jean LeBrun) UniCAD Canada Ltd. Celso Faia VLSI Technology Dick Ulmer, Sung Oh, Swami Gangadharan, Daniel Kim, Tom Dockery 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 Tektronix, Inc. Brock Hannibal TRW & Free Model Foundation Robert Harrison Veribest/Integraph Ian Dodd, David Wiens 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. Upcoming Meetings: The bridge numbers for future IBIS teleconferences are as follows: Date Bridge Number Reservation # Passcode 6/7/96 (916) 356-9200 1-77607 8892397 Las Vegas, NV., 9:00 A.M. to 1:00 P.M. 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 Tim Minnick is working with Hank Herrmann at AMP on producing IBIS Connector Models. Mike Magdaluyo of Philips Semiconductor's Logic Products Group has been involved with Philips Spice Models and is researching IBIS models with the expectation of producing them in the future. EIA MEMBERSHIP AND TREASURER'S REPORT Bob Ross reported no treasury change. Bob is still researching with Patti Rusher membership payments. The account is $9,988.59 minus some DAC expenses for the meeting and awards. Jeff Chu needs to follow up with EIA concerning Digital Equipment membership payment. Bob will contact Jon Powell concerning who are official members for a possible IBIS member company poster update. A polling of companies indicated that NCR, Intel, and Contec have paid their membership even though the EIA records may not indicate payment. AR - Bob Ross continue working with Patti Rusher regarding membership payment issues. MINUTES REPORT, MISC. No Corrections. Bob Ross review all ARs. Except for publishing the EDIF letter ballot comment, all ARs have been completed or handled by alternative action. MISCELLANY/ANNOUNCEMENTS None. PRESS AND WEB PAGE UPDATES Sigrity reports support of IBIS models on page 120 in the April 29, 1996 issue of Electronic Engineering Times. NEW MODELS The Intel Web site http://www.intel.com has additional IBIS models available from the Chandler, Arizona division. They can be accessed with SEARCH (small letters at the top of the home page) on IBIS. They consist of some flash memory and i960 components. OPENS FOR NEW ISSUES Will Hobbs for Ramp discussion (not discussed) Bob Ross for BIRD35 (not discussed) DAC STANDARDS BOOTH Jon Powell reported that Patti Rusher is handling the IBIS visuals for the EIA booth at DAC. Bob Ross has supplied the IBIS bullet items to be used with the display. Jon Powell will generate additional IBIS Spoken Here signs and will distribute them at DAC on the floor. See Jon at the Quad Design booth if you need signs. They will have stands (as opposed to Velcro backing). Jon Powell also generated 50 "I Like IBIS" buttons and sent one to Bob Ross and Will Hobbs. They will also be available at DAC. DAC (DESIGN AUTOMATION CONFERENCE) MEETING ARRANGEMENTS AND AGENDA The Standards Roadmap Birds of the Feather Meeting by Ron Werner of Motorola on Thursday, June 6, 1996 between 6 PM and 8 PM may provide an opportunity to comment on the Roadmap. We decided not to do our own BOF session because IBIS is now quite well-known. EIA/IBIS MEETING Will Hobbs indicated that the EIA/IBIS Face to Face meeting will be at the Las Vegas Hilton Hotel between 9 AM and 1 PM. Arrive early for refreshments. Election of new officers (nominations on the floor), awards, and other administrative issues will be handled. Unlike other DAC meetings, some technical issues will also be discussed. Several people wanted unity and closure of the package/mated-model issue as the primary technical issue. AR - Stephen Peters on behalf of the Package Committee prepare a presentation and provide a recommended format. To ensure that representatives who have major interests in this issue can participate, even though they may not be able to attend DAC, a phone bridge will be established. AR - Bob Ross get phone bridge number to publish in Agenda, and contact Patti Rusher to get a speaker phone in the meeting room Bob Ross polled and estimate that about 10 people who were at this meeting will be at DAC. AR - Anyone, contact Will Hobbs if you are attending the EIA/IBIS Summit. GOLDEN PARSER UPDATE Thanks to Chris Rokusek for providing the parser executables. Bob Ross checked out the fixes, and the executables are now on vhdl.org under /pub/ibis/ibischk2. Kellee Crisafulli stated that winibis will be upgraded with the new parser. He also reported that the parser issues an ERROR if there are too many pins, as in the Motorola Power PC 620. Bob Ross will investigate. (After the meeting, Bob checked this and found that a the error occurs when a Version 1.1 IBIS file is tested. This error does not occur for Version 2.1 IBIS files. So this is a limitation in the original ibis_chk program which is embedded within ibischk2. One solution is to change the [IBIS Ver] to 2.1, even for 1.1 files. This will also give addtional tests.) SPICE TO IBIS VERSION 2.1 Bob Ross reported that Alan Glaser is spending several weeks a s2ibis2.1 upgrade. Bob reported another crash with respect to table generation for ECL devices based on wrong ranges, and then a segment fault when these Spice outputs are used to generate the IBIS file due to memory overrun errors. (Based on a discussion after the meeting, Alan is still working on problems and interface upgrades. He may take several more weeks. He requests input from anyone on problems and improvements.) AR - Bob Ross continue to work with Alan Glaser concerning the s2ibis2.1 upgrade. EXPRESS INFORMATION MODEL ACTIONS Since last meeting, Olaf Rethmeier reported on an existing Express Model for IBIS 2.0 done in June 1994. Since IBIS has had minimal technical changes from that point to ANSI/EIA-656 (IBIS Version 2.1), this format is still very close to the current version. Bob Ross has discovered only a few minor errors such as specifying integers for revision numbers. Bob has committed to providing a technical review and upgrade resulting in a good starting point for an Express representation for IBIS Version 2.1. Kellee Crisafulli raised some questions on whether there was a reader or way of testing the Express representation. We did not know the answer. IBIS COMMENTS ON EDIF 3 9 9 The AR for David Wiens to provide formal comment on behalf of the IBIS Committee on EDIF 3 9 9 and publish them on the IBIS reflector still needs to be done. AR - Stephen Peters work with David Wiens on the comment and publish it on the IBIS reflector as soon a possible. The primary issues are to add within EDIF a reference to IBIS components and to be able to store and retrieve passive (R, L, C) component electrical values. Bob Ross will also provide an Interconnectix comment for these concerns. Bob will work with Kellee Crisafulli to get a better understanding of this issue before formulating a response. EGG10 - PARSER ADDITIONS FOR NUMERICAL CHECKING Chris Rokusek covered the contents of EGG10 proposed a while ago. A set of ibischk2 tests are proposed to check the validity of model data and to issue warning messages for questionable contents. (1) Polarity test. Bob Ross indicated that ibischk2 already has a good polarity test, so this may already be covered. (2) Checking Waveform table endpoints. This looks like a good test. Bob indicated that the test should included the contributions of the clamp tables since it is possible that there may be internal "pullup resistors" or "pulldown resistors". Warnings should not be issued for correct IBIS data. (3) Warning for large diode currents. Excessively large currents around 1 V to 1.5 V in the order of amps are too large and may indicate a units problem. Chris will examine all of the IBIS files to see if there is a reasonable large test current at, say, 1 V or 1.5 V in the order of 1 A 100 A which could be used to trigger a warning message. (4) Abrupt slopes. The intent is to trap discontinuities and also to issue warnings if there are abrupt changes such as with a 3-point diode model. The test would be based on a second derivative limit. Kellee Crisafulli. indicated that this would not be a problem for some simulators. Also, some noisy models obtained from measurement may have noise. So there are still open issues on this test. (5) Stephen Peters added a component value reality test for C, L, and R components and also for the dV/dt values. Arpad Muranyi suggested that identical dt's would indicate that the incorrect "reduced" ramp rate ratio was used. Bob Ross wanted the test to be based on actual values, and not on just the units since ibischk2 already does polarity testing based on actual values. Some possible upper limits might be C = 1 uF L = 1 mH, and R, no limit. However, testing for an R value greater than 1 M may reveal a units problem when milliohms was intended. Stephen expected that the terminator keyword R/C components would not be tested. Bob added that this set of tests might be part of the model validation process that we have been discussing. BIRD31.3 - MATED MODELS Bob Ross discussed only the latest change making the Tedge_rate parameter optional based on the fact that the Tedge_rate = 0 discussion was functionally the same thing. Stephen Peters proposed using "0" to indicate DC usage guarantee only, rather than very small rise time. Hank Herrmann would still like to make this parameter a required parameter. The discussion then was about whether one section was to be assumed a discrete L/C section or could be a transmission line segment. Stephen Peters said that BIRD28.3 presumes that if Len = 0, it is for a discrete section, and a non-zero length creates a distributed element. C. Kumar and others representation simulator companies preferred the distributed representation basis since those simulators which use discrete elements can estimate the number of sections based on actual edge_rate requirement. One suggestion was to use Z0 and delay for clarity for distributed sections. This discussion was tabled to move on to the related package discussion. PACKAGE COMMITTEE DISCUSSION Stephen Peters reported that the package committee had three fundamental approaches to electrical representation: a segment approach from Jon Powell, a Spice like nodal approach from C. Kumar, and a BIRD28.3 extension from Stephen Peters. The committee decided not to deal with the submatrix issue because it opened up some issues regarding reference planes and format preferences that needed more time to resolve. The main focus from Steven will be to examine extensions for nodes, forks, etc., and to possibly to come up with a format that includes mated models. As already indicated, Stephen plans to have a proposal for discussion at the DAC meeting. BIRD34.1 - HANDLING STORED CHARGE Not discussed. NEW ITEMS Not discussed. NEXT MEETING: The next meeting is at DAC, Friday, June 7, 1996 9:00 A.M. to 1:00 P.M., at the Las Vegas Hilton adjacent to the Las Vegas Convention Center. ============================================================================== NOTES IBIS CHAIR: Will Hobbs (503) 264-4369, Fax (503) 264-4210 will_hobbs@ccm.jf.intel.com Server Chipset System Validation 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 Transmission-Line Products Manager, Quad Design 1385 Del Norte Rd., Camarillo, CA 93010 SECRETARY: Bob Ross (503) 603-2523, fax (503) 639-3469 bob@icx.com Modeling Engineer, Interconnectix, Inc. 10220 SW Nimbus Ave, K4, Portland, OR 97223 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. ==============================================================================