Minutes, IBIS Quality Committee 17 Jun 2008 11-12 AM EST (8-9 AM PST) ROLL CALL Adam Tambone * Anders Ekholm, Ericsson Barry Katz, SiSoft Benny Lazer Benjamin P Silva Bob Cox, Micron * Bob Ross, Teraspeed Consulting Group Brian Arsenault David Banas, Xilinx * Eckhard Lenski, Nokia Siemens Networks Eric Brock * Guan Tao, Huawei Technologies Gregory R Edlund Hazem Hegazy Huang Chunxing, Huawei Technologies John Figueroa John Angulo, Mentor Graphics Katja Koller, Nokia Siemens Networks Kevin Fisher Kim Helliwell, LSI Logic * Lance Wang, IOMethodology Lynne Green * Mike LaBonte, Cisco Systems Mike Mayer, SiSoft * Moshiul Haque, Micron Technology Peter LaFlamme Randy Wolff, Micron Technology Radovan Vuletic, Qimonda Robert Haller, Enterasys Roy Leventhal, Leventhal Design & Communications Sherif Hammad, Mentor Graphics Todd Westerhoff, SiSoft Tom Dagostino, Teraspeed Consulting Group Kazuyoshi Shoji, Hitachi Sadahiro Nonoyama Everyone in attendance marked by * NOTE: "AR" = Action Required. -----------------------MINUTES --------------------------- Mike LaBonte conducted the meeting. Call for patent disclosure: - No one declared a patent. AR Review: - Anders create example IBIS file with golden waveforms - TBD, maybe week after next - Mike add explanation of OPTIONAL and make 5.2.9 OPTIONAL - First part not done. New items: IBIS summit: - Bob: Lynne Green presented on IBIS model issues - Odd looking waveforms, etc. - Bob: Meeting with JEITA - Document about quality handed out. - Users, EDA, chip vendors have distinct problems. - About 12 test cases. - Used different tools, different users. - Sometimes tool setup is a quality factor. - Tools can give different results for the same part. - Would like to have public test circuits. - Need mechanism to report problems which may be either with EDA or chip vendor. - David: Similar to Anders request: need standardized test circuits. - Mike: IBIS simulators seem to be implemented differently - Bob: There are similarities - Michael Mirmak gave a presentation: - SerDes with [Test Load] - No single buffer has the actual output waveforms - Can not be extracted directly - Need to compensate for elements of construction Bob: Single waveform model in HSPICE - fwf_tune and rwf_tune default settings (0.1) are odd - Buffers with only one waveform are compliant - 1ns waveform creates 0.1ns second curve - Should be set to 1.0 for symmetric buffers - Moshiul: tested this - Significant difference between different ramp_rwf and ramp_fwf - Bob: Default settings will not give good results - IQ 5.4.5: Output and IO buffers have should have 2 sets of V-T tables - Mike: Arpad had a presentation on different fixture arrangements - Moshiul: Good wav BIRD 109 was passed with "0V" exclusion. - S_Overshoot is for functional operation. 5.2.13. {LEVEL 2} [Model Spec] S_Overshoot subparameters complete and match data sheet - Data sheet may not have functional limit, may have only destruction limit - Moshiul: Vinh max should be the functional limit, for example - DDR2 Vinh is 1.15 and max limit is 1.8V - Anders: repeating a high voltage at a high enough rate depletes charge - A vendor had the same limits for DC and AC - Moshiul: Usually the limit is to avoid forward bias of clamps - Anders: Do we want "and match data sheet"? - Bob: We have to distinguish from measurements, which will have narrower ranges - Moshiul: The data sheet will always have a wider range. Next meeting: Review 5.2.15 next time 24 Jun 2008 11-12 AM EST (8-9 AM PST) Meeting ended at 01:xx PM Eastern Time.