DATE: 5/19/98 SUBJECT: 5/15/98 EIA IBIS Open Forum Minutes VOTING MEMBERS AND 1998 PARTICIPANTS LIST: AMP (Martin Freedman) Applied Simulation Technology Norio Matsui, Raj Raghuram* Cadence Design (& UniCAD) C. Kumar, Don Telian, Patrick Riffault, Craig Lewis, Greg Fitzgerald, Paul Galloway, Patrick Dos Santos, Catherine Weiss, Alain Tribaudot, Geoffrey Ellis Cypress (Bruce Wenniger) Digital Equipment Corp. Jeff Chu, Greg Edlund*, Bob Haller Hewlett Packard (EEsof, etc.) Karl Kachigan, Henry Wu, Paul Gregory High Design Technology Razvan Ene HyperLynx Kellee Crisafulli, Matthew Flora* Incases Olaf Rethmeier, Scott Jacobson, Werner Rissiek Intel Corporation Stephen Peters*, Arpad Muranyi*, Frank Kern, Will Hobbs, Prakash Radhakrishnan, Mohammed Hawana* Columbia, SC (formerly NCR) Dave Moxley* Mentor Graphics (Zeelan, Bob Ross*, George Opsahl, Mark Noneman, Interconnectix, etc.) Tom Dagostino, Karine Loudet, Jean Oudinot, Manuel De Almeida, Stephane Rousseau, Nevin Orhanovic Mitsubishi Hoang Nguyen, Tam Cao Motorola (Ron Werner) National Semiconductor Syed Huq, Cheng-Yang Kao, John Goldie, Ikchang Song North East Systems Associates Edward Sayre, Kathy Breda (NESA) NEC (Hiroshi Matsumoto) Quantic EMC (Mike Ventham) Texas Instruments Thomas Fisher, Harvey Stiegler, Vincent Chang, Jean-Claude Perrin*, Peter Forstner Thomson-CSF Jean-Marc Claveau, Laurent Duzaic, Saverio Lerose, Benoit Meyniel, Jean Lefebvre Viewlogic Jon Powell, Chris Rokusek, Guy de Burgh, Gary Mandel VeriBest Ian Dodd, David Weins, Ian Gabbitas VLSI Technology D.C. Sessions Zuken-Redac (John Berrie) OTHER PARTICIPANTS IN 1998: Actel Eric Tardif, Emmonvelle Gaudin Aerospatiale Lionel Dreux, Claude Huet Alcatel (Bell, Espace, etc.) John Fitzpatrick, W. Temmerman, Laure Bessettes, Jean-Claude Pourtau, Daniel Peron ALS Design Yves Mouquet Ansoft Eric Bogatin Apple Fred Floresca, Danny Itani Apteq Design Systems Dan FitzPatrick Avanti Nik Bannov CERN Olivier Clere, Jean-Michel Sainson, Rudi Zurbroken Compaq Shariq Rahma Crucial Technology Rathna Reddy EIA Patti Rusher* EMC Fawn Engelmann ENST, Paris Jean-Jacques Charlot European CAD Standardization Adam Morawiec Intitiative (ECSI) Fairchild Semiconductor Peter LaFlamme H.A.S Electronics Haruny Said Intracon Design Ltd. Derek Laidlaw Philips Semiconductor Todd Andersen* Scottish Electronics Robert Easson Manufacturing Center (SEMC) Seagate Vanessa Howard SGS-Thomson Philippe Lefevre Siemens Gerald Bannert, Bernhard Unger, Christian Marot, Miguel Hernandez, Gil Russell Symmetry Andy Hughes Tektronix Nassrin Ghahyasi Ultratest International Chris O'Connor Xilinx Susan Wu 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 June 5, 1998 (916) 356-9200 4-167410 9468535 June 18, 1998 IBIS Summit Meeting - No Phone Bridge 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 Mohammed Hawana heads the XTG modeling group from Intel and is involved in distributing I/O Buffer Models. MEMBERSHIP UPDATE AND TREASURER'S REPORT Patti Rusher sent Bob Ross a financial report. Bob stated that there are 23 IBIS members. He is tracking down the payment status for one membership and for four parser invoices, and Patti is checking with the EIA accounting department regarding whether payment has been made. REVIEW OF MINUTES AND AR'S Bob noted that some minor editorial corrections were made on the April 24, minutes. The ARs will be discussed during the meeting. MISCELLANY/ANNOUNCEMENTS Syed Huq is out until Wednesday, May 27, 1998 to be home for his second baby. PRESS AND WEB PAGE UPDATES Greg Edlund stated that the May 1998 issue of Printed Circuit Design contains his article "IBIS Model Accuracy" on pages 40-42. Bob Ross mentioned a brief writeup on the Cadence free modeler in the April 23, 1998 issue of EDN, pg. 14. NEW MODELS AVAILABLE, LIBRARY UPDATE Jon Powell updated the official EIA IBIS home page Model links with many updates found by Matthew Flora and Bob Ross. Some of these are noted below: Atmel URL is changed to: http://www.atmel.com/atmel/products/prod180.htm Enhanced Memory Systems (owned by Ramptron International Corporation) has a model request form which includes IBIS Models: http://www.edram.com/modelfrm.html Fairchild Semiconductor no longer has CGS models, and the GTL URL has changed: http://www.fairchildsemi.com/models/ibis/gtl/index.html Hewlett-Packard has added an IBIS model for the Gigabyte products: http://hpcc920.external.hp.com/HP-COMP/gigabit/ibis.html IBM has added some Power-PC IBIS models at http://www.chips.ibm.com/products/ppc/documents/datasheets/products.html IC Works is has IBIS models at: http://www.icworks.com/IBIS Integrated Device Technology URL has changed to: http://www.idt.com/models/Welcome.html International Microelectronics, Inc. FTP site is relocated to: ftp://ftp13.ba.best.com/pub/imiweb8/ibis Mosel Vitelic has DRAM model for 16M and 64M devices at http://www.moselvitelic.com/sec2/Dynamic.html Motorola has added several links for IBIS models for Fast SRAM products. Select Asynchronous Fast SRAMs, Burst RAMs, Integrated Cache Solutions, and Tag RAMs under: http://www.mot.com/SPS/FastSRAM/productupdate The Samsung links have been changing. For a while they were supplying DRAM models, and the SRAM link had a listing of models and a request form at the bottom. However, it now appears that the top level link is needed. You select Products and the "Service" paths to get to the IBIS models. The SRAM IBIS model listing and request form are available. A DRAM path is not activated. The Graphics RAM IBIS models listed, but the IBIS links are not working. The top level link is: http://www.sec.samsung.com Texas Intruments has some PC100 sites for ALVC and CDC models: http://www.ti.com/sc/docs/asl/pc100.htm http://www.ti.com/sc/docs/msp/cdc/pc100.htm OPENS FOR NEW ISSUES Patti Rusher and Bob Ross on the EDA Booth and IBIS Meeting at the Design Automation Conference. INTERNATIONAL/EXTERNAL PROGRESS - IEC 62014-1 (IBIS Version 2.1) - Patti Rusher indicated that a meeting was held where a number of IEC numbers were changed. However, the IBIS number is still the same. Patti is still waiting for IEC 60214-1 to be formally ratified - possibly at the IEC meeting in September, 1998. - pr EIAJ ED-5302 Standard for I/O Interface Model for Integrated Circuit (IMIC) - Bob Ross got a message from Fukuda-san regarding the web page below: http://tsc.eiaj.or.jp The "Outline of I/O Interface Project Group" link is new, and Version 1.1 dated March 31, 1998 is in a .pfd format. Bob noted that a few pages could not be printed because of some font problems. The comment deadline is June 10, 1998 - IEC 93/67/NP IBIS and EMC Simulation - Jean-Claude Perrin reported that another meeting will be held in May, 1998. Jean-Claude sent Bob Ross the Power Point presentation given at the February 27, 1998 Experts meeting in Paris, and Bob has uploaded it to eda.org under the /pub/ibis/wip directory. - JC-16B - Patti Rusher stated that she is reserving more hotel space at an adjacent hotel for the co-located JEDEC and IBIS Summit meeting to be held in San Diego in December, 1998. Patti indicated that while the scope of the JEDEC committee includes software, the committee itself is not really doing any work in this area. Bob Ross indicated interest in the flexible impedance driver work that D.C. Sessions mentioned in some recent signal integrity reflector discussions. IBIS EAST USERS GROUP ACTIVITIES Greg Edlund reported that the Model and Validation subcommittee will be meeting on Thursday, May 21, 1998 at Digital. He will get a telephone number for interested people to call in. The regular Users group meeting is moved to Thursday, May 28, 1998 and will be held at Stratus Computer. Greg contacted Kathy Breda, and the plan is to consider an IBIS course at or near the IBIS Summit location to be held in October, 1998. The class is not planned to be tied in with the PCB Conference East. IBIS LOGO CHANGE No vote was held. Rather, the committee decided to use the current logo that is on the EIA IBIS Home page. Some minor changes were suggested at the April 24, 1998 meeting regarding the IBIS name size, etc., but no alternative designs have been created. Patti Rusher mentioned that the logo will be refined and will be of a higher quality in preparation for the Design Automation Conference (DAC) EDA booth graphics displays . Bob indicated that changes could be made after DAC, but the logo already looks very good. At the April 24, 1998 meeting, the question was raised, but not addressed, on whether the IBIS Users group could use the new IBIS logo. Bob supported the IBIS Users Group using the IBIS logo, if they wish, since the work the Users Group is doing is in close cooperation with the IBIS Open Forum. EDITING COMMITTEE Bob Ross uploaded an UNOFFICIAL IBIS ver3_1c.ibs document with the BIRD47 change and other minor changes on eda.org under /pub/ibis/wip. The BNF AR remains. AR - Bob Ross generate and post a BNF for IBIS Version 3.0 (an IBIS Version 3.0 ratification AR). BIRD44 - INTERPRETATION OF MIN/MAX/WEAK/STRONG DATA Bob Ross indicated no progress. AR - Andy Ingraham to issue BIRD44.1 with the changes and extensions noted in the March 13, 1998 IBIS Open Forum meeting minutes. IBISCHK2+ (VER 2.1.15) PROGRESS Matthew Flora indicated that he received a set of changes from Chris Rokusek to make the parser work equally well in UNIX and DOS environments. Bob Ross indicated that there are currently six BUGs fixed in the ibischk3 and ebdchk3 preliminary code, and these fixes should be planned for the Version 2.1.16 release. BUG28 - ENDPOINT MISSED DUE TO FLOATING POINT PRECISION Bob Ross explained that Chris Rokusek discovered and provided a correction to a floating point precision problem when the load line intersection point falls exactly on a I/V segment endpoint. Chris' solution involves setting a tolerance limit for floating point compares. Bob classified this as Moderate, Medium, Open, and intends that this fix be rolled into ibischk2+ Version 2.1.16. VERSION 3.1 PARSER DEVELOPMENT Bob Ross stated that he did a review of the ibischk3 and ebdchk3 Version 3.0.1 and sent the comments to Atul Agarwal. Overall, the parsers are in very good shape and are very useful in their preliminary forms. Bob mentioned that there were a few error messages that were confusing or missing. Also he might want to change the warning messages for negative times under [Model Spec] to error messages. The test files for the Electrical Board Description are functioning. However, more test files and more investigation would be valuable. He encourages anyone interested in the .ebd syntax to look at that part of the parser. Chris Rokusek provide Bob the executables for the Version 3.0.1 release, and Bob uploaded them to eda.org under /pub/ibis/ibischk3 in a compressed form per the AR. These are preliminary code, but should be useful for review and for doing IBIS Version 3.0 extensions. COOKBOOK Stephen Peters reports that there no is progress on the Cookbook project. IBIS MODEL REVIEW COMMITTEE DISCUSSION Matthew Flora indicated no activity other than one model that he did not forward since it did not pass the ibischk2+ test. Matthew suggested that information about the IBIS Model Review committee and process be sent out again. Bob suggested that Matthew prepare a short writeup indicating that models for review should be sent to Matthew. They will be distributed to to five other EDA tool vendors for review. Comments and suggestions will be given back privately to the model developer. The purpose is to help the model developer provide better models and information that the EDA tools need to process IBIS models. Matthew indicated that the reference to the Model Review committee in Greg Edlund's article mentioned above may have left the false impression that only Hyperlynx will be reviewing the models. For general information, the contact person is: Matthew Flora, HyperLynx mbflora@hyperlynx.com AR - Matthew Flora issue to the IBIS reflector a short writeup on the IBIS IBIS Model Review committee. DESIGN AUTOMATION CONFERENCE (DAC) IBIS SUMMIT MEETING AND EDA BOOTH Patti Rusher had asked whether the IBIS committee wanted to have handouts for the EDA booth at DAC. After some discussion, the only handout will be a one page writeup on IBIS giving some general information and some sources for more information. Much information including magazine information and IBIS links are already on line. Bob Ross asked Stephen Peters to prepare a one-page handout. AR - Stephen Peters prepare a one page IBIS information sheet to be handed out at the EDA booth at DAC. Bob indicated that the agenda is open for the San Francisco IBIS Summit meeting at DAC on June 18, 1998. Election of officers will be held. Bob expects some technical discussions and presentations to relate to the BIRDs that are being considered. However, other presentations will be welcome. Bob will send out information on the DAC IBIS Summit meeting including a request for presentations. BIRD42.3 - MODELING CURRENT WAVEFORMS Bob Ross stated that there was some signal integrity and IBIS reflector discussion on crowbar currents that are related to this issue. Bob is planning that BIRD42.3 be discussed at the next (June 8, 1998) IBIS meeting. BIRD48.1 - ADD MODEL BIRD49.1 - ADD MODEL DYNAMIC CLAMPS BIRD50 - ADD MODEL BUS HOLD Bob Ross had sent out BIRD48.1 and BIRD49.1 and introduced the revisions. Bob mentioned that he and Arpad Muranyi also had discussed the extensions the previous day. One revision in BIRD48.1 was add additional references in the [Model] keyword for the Dynamic_clamp and Bus_hold subparameters of Model_type. Also, the Add_model_mode subparameter was added to the [Model] keyword sub- parameter list. It is to be used when the model is used as an added model. The Add_model_mode arguments are Output and Non-Output. When the top-level model is an I/O or 3-state model, the Add_model_mode is used to restrict the operation of the added model, if needed, to just Output mode or Input or 3-state mode. For example, the dynamic clamp functionality may exist only for the Input mode of an I/O buffer. Arpad suggested changing the names of the arguments to Driving and Non-driving, and Bob agreed. There was discussion concerning whether the Add_model_mode subparameter should be in the added model or in the top-level model which calls the added model. One advantage of moving it to the top level is that the modes of operation for the added model will clearly tie in with the Model_type of the top-level model. Stephen Peters questioned whether the [Driver Schedule] keyword is impacted by the Add Model structures, and Bob indicated that the Add Model details are separate. Bob also noted that the V_trig_r and V_trig_f syntax would be corrected to V_trigger_r and V_trigger_f, consistent with BIRD49.1 and BIRD50 usage. Some other text corrections will be made for notation and clarity per discussions at the meeting and with Arpad. BIRD49.1 extended the dynamic clamp functionality to include a non-triggered method of invoking it. In practice, dynamic clamps can also be invoked by a separate clock. The method proposed in BIRD49.1 involves using a negative time value as the first entry of the [GND Pulse Table] or [POWER Pulse Table] keyword. The corresponding V_trigger_f or V_trigger_r entries would be omitted or ignored. There was some discussion and concern on using negative numbers, and this will be investigated. Arpad had provided a several technical and editorial comments off line. Stephen Peters will also provide some editorial comments off line to be considered. BIRD50 remains unchanged regarding the bus hold functionality and was not reissued. However, the title is incorrect, so BIRD50.1 will be issued to at least change the title. Bob noted that the functionality can be used beyond just modeling bus hold. AR - Bob Ross issue BIRD48.2, BIRD49.2 and BIRD50.1 to capture the changes in this discussion and in the off line discussions. Bob Ross is planning to call for a vote BIRD48.2, BIRD49.2, and BIRD50.1 at the June 5, 1998 meeting. Stephen commented that he would like more participation by EDA vendors on this discussion. Bob agreed to discuss this with some of the EDA vendors. BIRD46.1 - RELAXATION OF SOME IBIS FILE NAME RESTRICTIONS Since BIRD46.1 has not been issued, Bob Ross deferred the discussion. AR - Matthew Flora issue BIRD46.1 to include references to the .pkg file and .ebd file and to change the limitation from 64 total characters to a limit of 20 characters and delete the references to allowing the period "." character. BIRD51 - 3-STATE ECL Bob Ross introduced BIRD51. Even though BIRD51 extends over several pages, it changes only a few lines to add 3-state-ECL to the list of Model_type subparameters under [Model] and under Ramp in Notes on Data Derivation section. As indicated before, several ECL devices with a true high-Z mode. BIRD51 will be scheduled for a vote at the next meeting. NEXT MEETING: The next teleconference meeting is on Friday, June 5, 1998, 8:00 A.M. to 9:55 A.M. BIRD48.2, BIRD49.2, BIRD50.1, BIRD51, will be scheduled for a vote. BIRD46.1, if issued, is scheduled for a vote. BIRD42.3 is scheduled for technical discussion. ============================================================================== NOTES IBIS CHAIR: Bob Ross (503) 685-0732, Fax (503) 685-4897 bob_ross@mentorg.com Modeling Engineer, Interconnectix BU of Mentor Graphics 8005 S.W. Boeckman Road, Wilsonville, OR 97070 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, Viewlogic (formerly Quad Design) 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@eda.org To join, change, or drop from either the IBIS Open Forum Reflector (ibis@eda.org), the IBIS Users' Group Reflector (ibis-users@eda.org) or both. State your request. ibis-info@eda.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@eda.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@eda.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@eda.org To report ibischk2 parser bugs. The Bug Report Form Resides on eda.org in /pub/ibis/bugs/ibischk/bugform.txt along with reported bugs. To report s2ibis, s2ibis2 and s2iplt bugs, use the Bug Report Forms which reside under eda.org in /pub/ibis/bugs/s2ibis/bugs2i.txt, /pub/ibis/bugs/s2ibis2/bugs2i2.txt, & /pub/ibis/bugs/s2iplt/bugsplt.txt respectively. 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 eda.org for more information on previous discussions and results. You can get on via FTP anonymous. ==============================================================================