IBIS Macromodel Task Group Meeting date: 17 November 2009 Members (asterisk for those attending): Adge Hawes, IBM Ambrish Varma, Cadence Design Systems * Anders Ekholm, Ericsson * Arpad Muranyi, Mentor Graphics Corp. Barry Katz, SiSoft * Bob Ross, Teraspeed Consulting Group Brad Brim, Sigrity Brad Griffin, Cadence Design Systems * Chris Herrick, Ansoft Chris McGrath, Synopsys Danil Kirsanov, Ansoft David Banas, Xilinx Deepak Ramaswany, Ansoft Donald Telian, consultant Doug White, Cisco Systems Eckhard Lenski, Nokia-Siemens Networks Eckhard Miersch, Sigrity Essaid Bensoudane, ST Microelectronics * Fangyi Rao, Agilent Ganesh Narayanaswamy, ST Micro Gang Kang, Sigrity Hemant Shah, Cadence Design Systems Ian Dodd, consultant Jerry Chuang, Xilinx Joe Abler, IBM * John Angulo, Mentor Graphics John Shields, Mentor Graphics Ken Willis, Cadence Design Systems Kumar Keshavan, Sigrity Lance Wang, Cadence Design Systems Luis Boluna, Cisco Systems * Michael Mirmak, Intel Corp. * Mike LaBonte, Cisco Systems Mike Steinberger, SiSoft Mustansir Fanaswalla, Xilinx Patrick O'Halloran, Tiburon Design Automation Paul Fernando, NCSU Pavani Jella, TI Radek Biernacki, Agilent (EESof) * Randy Wolff, Micron Technology Ray Komow, Cadence Design Systems Richard Mellitz, Intel Richard Ward, Texas Instruments Samuel Mertens, Ansoft Sam Chitwood, Sigrity Sanjeev Gupta, Agilent Shangli Wu, Cadence Design Systems Sid Singh, Extreme Networks Stephen Scearce, Cisco Systems Steve Kaufer, Mentor Graphics Steve Pytel, Ansoft Syed Huq, Cisco Systems Syed Sadeghi, ST Micro Ted Mido, Synopsys * Terry Jernberg, Cadence Design Systems * Todd Westerhoff, SiSoft Vladimir Dmitriev-Zdorov, Mentor Graphics Vikas Gupta, Xilinx Vuk Borich, Agilent * Walter Katz, SiSoft Zhen Mu, Mentor Graphics ------------------------------------------------------------------------ Opens: - None -------------------------- Call for patent disclosure: - No one declared a patent. ------------- Review of ARs: - Arpad update flow slides - Done - Arpad modify 10/20/2009 flow to include Use_Init_Output boolean - In progress - Arpad Write a clarification BIRD to discuss accuracy issues related to the various AMI clock_tick algorithms in an IBIS-AMI DLL - TBD - Todd: Update the BIRD for IBIS S-parameter box based on feedback from discussion - No update - Arpad: Write parameter passing syntax proposal (BIRD draft) for *-AMS models in IBIS that is consistent with the parameter passing syntax of the AMI models - TBD - TBD: Propose a parameter passing syntax for the SPICE - [External ...] also? - TBD - Arpad: Review the documentation (annotation) in the macro libraries. - Deferred until a demand arises or we have nothing else to do ------------- New Discussion: Meeting schedule through the holiday season: - Arpad showed the available meeting dates - We will cancel for Nov 24 due to Thanksgiving - Walter is traveling Dec 1, but we will meet - Mike L unavailable Dec 8, but we will meet - We will meet Dec 1 and 15 - People may be traveling Dec 22, no meeting - Several people are unavailable Dec 29 - We will meet Jan 5 & 12 Arpad showed the Final AMI Flow slides: - Slide 2: - The first slide is the "all in one" flow - Convolution 3 box has only 3 possible combinations - Fangyi: What if Tx Use_Init_Output is false? - Walter: Then you have to use the GetWave flow - Slide 3: - Both GetWaves present - Slide 4: - Rx Use_Init_Output can only be true - Fangyi: Don't have to do deconvolution? - Arpad: Not true - Fangyi: Convolution 3 & 4 should be combined into one step - Walter: They can be replaced with some logic that does not include convolution - Arpad: Note 2 can be removed now - Slide 5: - Tx Use_Init_Output can only be true here - Boxes 3 & 4 can be merged here too - Bob: The preferable flow is anything that avoids deconvolution AR: Arpad fix AMI flow slides 4 & 5 Walter showed the AMI BIRD document: - We should review this and discuss later - Existing known models will work with these changes - We should get rid of Tx_Jitter and Rx_Clock_PDF - No one has been able to use them - It contains a "Summary of significant changes" - It explains the contents of .ami file - There is no difference between reserved and model specific parameters - Bob: We are case-insensitive? - Walter: No, case sensitive - We should require the first letter to be alpha for simulator compatibility - Reserved parameters start with a capital letter - Walter added "Array" - Should support an AMISearchPath ENV variable - Arpad: What if AMI file declares an Input parameter to be an Output? - Type is required - Labels are displayed in the GUI - The Table format is gone - We can't have different .ami files for same model with different executables - Fangyi: Why is Use_Init_Output optional? - Walter: It has a default - Some existing files will not have this - Would like Tx_DCD to be Info type - That may be a major discussion point - Clock PDF replaced with Mean and Rj - Limit and Scale are new tap parameters - Array type easily adds more than a few taps - Examples are useful for understanding the changes - AMI_Init should ignore null memory handles - Explanation of Dirac impulse response - Place for Arpad to add discussion of clock ticks - Mike L: Should this be posted? - Walter: It could be emailed or posted - Bob: This is an overwhelming change - The 5.0 parser would be invalidated for AMI - Walter: These would be 5.1 AMI models - A 5.0 AMI will be OK in the 5.1 parser - Bob: Don't like Description as a reserved parameter - And Format would be deprecated - Walter: Currently it is ignored if there - Bob: The parser writer got hung up because of contradictory statements - We should have a parser writer review - Walter: Agree - Arpad: We should post this on the website AR: Walter send AMI BIRD to Mike L for posting Next meeting: 01 Dec 2009 12:00pm PT -------- IBIS Interconnect SPICE Wish List: 1) Simulator directives