IBIS Macromodel Task Group Meeting date: 03 Jan 2012 Members (asterisk for those attending): Agilent: Fangyi Rao Radek Biernacki Altera: * David Banas Ansys: Samuel Mertens * Dan Dvorscak * Curtis Clark Arrow Electronics: Ian Dodd Cadence Design Systems: Terry Jernberg * Ambrish Varma Feras Al-Hawari Celsionix: Kellee Crisafulli Cisco Systems: Ashwin Vasudevan Syed Huq Ericsson: Anders Ekholm IBM: Greg Edlund Intel: Michael Mirmak LSI Logic: Wenyi Jin Maxim Integrated Products: Mahbubul Bari Mentor Graphics: * John Angulo Zhen Mu * Arpad Muranyi Vladimir Dmitriev-Zdorov Micron Technology: Randy Wolff NetLogic Microsystems: Ryan Couts Nokia-Siemens Networks: * Eckhard Lenski QLogic Corp. James Zhou Sigrity: Brad Brim Kumar Keshavan * Ken Willis SiSoft: * Walter Katz Todd Westerhoff Doug Burns * Mike LaBonte Snowbush IP: Marcus Van Ierssel ST Micro: Syed Sadeghi Teraspeed Consulting Group: Scott McMorrow * Bob Ross TI: Casey Morrison Alfred Chong Vitesse Semiconductor: Eric Sweetman Xilinx: Mustansir Fanaswalla The meeting was lead by Arpad Muranyi ------------------------------------------------------------------------ Opens: - Arpad: We could cancel the 31 Jan meeting, near the DesignCON summit -------------------------- Call for patent disclosure: - None ------------- Review of ARs: - Arpad send BIRD 123 changes from today to Walter - Done - Walter update BIRD 123 draft - Done - Arpad update Usage - Sent to email list, will be posted ------------- New Discussion: Walter showed the Jitter BIRD: - Ken: I had asked for additional verbage to be added but do not see it - Walter: I have added it into the BIRD introduction, but not to the IBIS spec changes - Ken: It should go in the spec to guide model developers - Walter moved the paragraphs into the spec change portion - The editorial group can decide if/where to move those paragraphs - Arpad and Bob agreed with this change - Bob: List, Increment and Step types have been added - Are these types needed for jitter parameters? - Arpad: It would be useful to use this table for all Reserved parameters - Bob: We already have 4 tables - They could be merged but grouped - Bob: There was a Tx_Sj_Frequency issue, can't find it now - It was a 5.1 issue - Walter: Discussions of the changes from old versions to new should be separate - We repeatedly spend time on this issue - Bob: Once we have 5.1/5.2 we have no basis for writing a parser - Arpad: This is a big issue, should be discussed in Open Forum - What is the problem with writing a parser? - Bob: The parser has to parse old versions that the new spec will not describe - Bob motioned to vote to submit BIRD 123 with changes - Ken seconded - No objections, the motion passed AR: Walter submit updated BIRD 123 to Open Forum Arpad showed the new Usage Out Fix BIRD draft: - Arpad: I added two small sections - Page 140: - The descriptions were misleading - It now has "to the AMI model" - Corner type for Usage Out is disallowed - The model is not the authority to know the selected corner - In BIRD 127.4 - Default and Value are mutually exclusive, must not be used together - They are synonyms in this case - Default is not allowed for Usage Out - Default is optional for Range, List, Corner, Increment, Steps - Note 10 is moved to above the list of Notes - This is an actual rule, not just a note - Ambrish: We could have an example to show what the EDA tool should do - Currently it only says what can be ignored - Arpad added a phrase - Ambrish: An example would be better - Bob: The removed note should still be in the notes - Arpad re-inserted a note #8 - Bob: We do not require Default and Value to be exclusive? - Walter: There is an implied default for all types but List - We should recommend using Default only for List - Arpad: We could eliminate Default by using the first List item as the default - Mike: Do we specify preference order between Default and implied defaults? - Arpad: Yes, Default must be used if present - Bob: There is a question on how Default interacts with Increment - Walter: This BIRD clarifies all of the ambiguities - Arpad: We can review one more time before submitting AR: Arpad send updated Usage Out Fix BIRD to Mike for posting Arpad showed a slide showing package BIRDs by sponsor: - Arpad: We should weed out some BIRDs - Walter: BIRDs 116-118 are a valid way to do it - BIRD 116 needs a reference to IBIS-BSS to handle non-AMI buffer models - Arpad: This will be a major topic of discussion in our next meetings Meeting ended. ------------- Next meeting: 10 Jan 2011 12:00pm PT Next agenda: 1) Task list item discussions ------------- IBIS Interconnect SPICE Wish List: 1) Simulator directives