IBIS Macromodel Task Group Meeting date: 18 April 2023 Members (asterisk for those attending): Achronix Semiconductor: Hansel Dsilva Amazon: John Yan ANSYS: * Curtis Clark Wei-hsing Huang Aurora Systems: * Dian Yang Cadence Design Systems: Ambrish Varma Jared James Google: Hanfeng Wang GaWon Kim Intel: * Michael Mirmak * Kinger Cai Chi-te Chen * Liwei Zhao Keysight Technologies: Fangyi Rao Majid Ahadi Dolatsara Stephen Slater Ming Yan Rui Yang Luminous Computing David Banas Marvell Steve Parker Mathworks (SiSoft): Walter Katz Graham Kus Micron Technology: Justin Butterfield Missouri S&T Chulsoon Hwang Yifan Ding Rivos Yansheng Wang SAE ITC Michael McNair Siemens EDA (Mentor): * Arpad Muranyi * Randy Wolff Teraspeed Labs: * Bob Ross Waymo: Zhiping Yang Zuken USA: * Lance Wang The meeting was led by Arpad Muranyi. Curtis Clark took the minutes. -------------------------------------------------------------------------------- Opens: - None. ------------- Review of ARs: Liwei: Send out draft3 of the IBIS-AMI Ts4file port order BIRD proposal. - Done. Arpad: Prepare a presentation and statement of the issue for the AMI_GetWave block size with continually adapting models topic. - Not Done. -------------------------- Call for patent disclosure: - None. ------------------------- Review of Meeting Minutes: Arpad asked for any comments or corrections to the minutes of the April 11th meeting. Michael moved to approve the minutes. Dian seconded the motion. There were no objections. -------------- New Discussion: PSIJ Sensitivity BIRD draft: Kinger reviewed a work in progress based on draft10. He had added Sub-params: sections for [PSIJ Sensitivity Rail] and [PSIJ Sensitivity Signal] to enumerate the new signal name related subparameters shown in the Examples. Arpad noted that the new subparameters should also be shown along with their respective keywords in the keyword hierarchy tree diagram. Arpad also suggested that the subparameters' behaviors be defined in the Usage Rules of their respective keywords. Bob suggested that the uses of the model_name, signal_name and bus_label subparameters should all be lower case in this proposal, though the group then noted some possible inconsistencies existing in IBIS 7.2 with respect to capitalization of certain subparameter names in various locations in the specification. Referring to a discussion at the previous meeting about explicitly stating that [PSIJ Sensitivity] can appear multiple times in each [Component], and [PSIJ Sensitivity Rail] can occur multiple times in each [PSIJ Sensitivity], and [PSIJ Sensitivity Signal] can occur multiple times in each [PSIJ Sensitivity Rail], Kinger noted that this was already stated in draft10 for everything except [PSIJ Sensitivity Signal]. Kinger added a similar explanation for [PSIJ Sensitivity Signal]. Curtis recalled Arpad's suggestion from the previous meeting that we should explicitly state that the new signal related subparameters may only refer to signals that appear in the same [Component] as the subparameters. Kinger agreed. Kinger said he would send out draft11 after incorporating the feedback from the meeting. BIRD draft for IBIS-AMI Ts4file port order: Liwei shared draft3. Liwei summarized the changes in draft3: - 2 new figures illustrating the 12-34 (Gonzalez) ordering for Tx and Rx were added. - Additional details were added in the Usage Rules. - A new sentence was added in Usage Rules explaining that the same port order applies to all possible file selections if the associated Ts4file Reserved Parameter uses Format List or Corner. Arpad noted that the Usage Rules contained the language "positive and negative" to describe terminals and signal paths, where the original Analog Circuit descriptions, sections 10.10.1 and 10.10.2 in IBIS 7.2, use the terms "inverting and non-inverting". Randy suggested several editorial changes including adding a missing ";" in the Required section of Tx_Port_Order. Curtis and Arpad noted the new sentence in Usage Rules: For Formats List and Corner, all Ts4files named shall use the same port order as defined by this parameter. To make it even clearer that the Ts4file is what might use List or Corner, they proposed: If the Ts4file Reserved Parameter uses Format List or Corner, all of its enumerated files shall use the port order defined by this parameter. Liwei said she would incorporate the feedback from the meeting and send draft4 to the ATM list. - Curtis: Motion to adjourn. - Bob: Second. - Arpad: Thank you all for joining. New ARs: Kinger: Send out draft11 of the PSIJ Sensitivity BIRD draft. Liwei: Send out draft4 of the IBIS-AMI Ts4file port order BIRD proposal. ------------- Next meeting: 25 April 2023 12:00pm PT ------------- IBIS Interconnect SPICE Wish List: 1) Simulator directives