IBIS Advanced Technology Modeling (ATM) Task Group Meeting date: 22 May 2018 Members (asterisk for those attending): ANSYS: Dan Dvorscak Curtis Clark Cadence Design Systems: Ambrish Varma Brad Brim Kumar Keshavan Ken Willis eASIC: David Banas GlobalFoundries: Steve Parker IBM Luis Armenta Trevor Timpane Intel: Michael Mirmak Keysight Technologies: Fangyi Rao * Radek Biernacki Ming Yan Mentor, A Siemens Business: John Angulo * Arpad Muranyi Micron Technology: * Randy Wolff * Justin Butterfield SiSoft: Walter Katz Todd Westerhoff Mike LaBonte SPISim: * Wei-hsing Huang Synopsys: Rita Horner Kevin Li Teraspeed Consulting Group: Scott McMorrow Teraspeed Labs: * Bob Ross The meeting was led by Arpad Muranyi. Randy Wolff took the minutes. -------------------------------------------------------------------------------- Opens: - Arpad discussed when to start working on the EMD proposal. Randy mentioned that this would be best discussed in the Interconnect Task Group. ------------- Review of ARs: - None. -------------------------- Call for patent disclosure: - None. ------------------------- Review of Meeting Minutes: Arpad asked for any comments or corrections to the minutes of the May 15 meeting. Radek moved to approve the minutes. Bob seconded the motion. There were no objections. ------------- New Discussion: - Discussion: Allow Terminator as a Model_type for IBIS-AMI receivers Arpad noted Curtis sent in email a comment that he preferred the first option for handling terminators that were in Michael's slides shown last week. Bob mentioned that he'd like to see a BIRD proposal to discuss. Radek noted he supported the same option as Curtis, the simplest option. Arpad wanted to look at whether the Terminator parameters could be split to the proper reference nodes. The bottom end of the Terminator is connected to the ground symbol in the schematic. This may cause complications with power aware simulations. If this is strictly for AMI purposes, then it would probably be ok to have the Node 0 ground reference. But, this could cause problems if people try to include power aware effects in the channel characterization for IBIS-AMI simulation. Bob noted the existing Terminator fits with IBIS-AMI in the way people are simulating now. Radek did not see a problem either, since option 1 is exclusively for AMI. Bob noted we are breaking a paradigm by including thresholds in a Terminator, but it works for AMI. Terminator could be expanded further to support more complicated modeling for AMI. Arpad's thoughts on the 2nd or 3rd options in Michael's presentation is that one would need to split the Rac and Cac elements to go to the POWER Clamp Reference and GND Clamp Reference terminals. This is seen in Figure 11 of the IBIS 6.1 specification. The C_comp in that figure has alrady been dealt with for splitting to multiple references. Arpad noted the proposal was made due to the simplicity of using existing model types for AMI. BIRD158 modeling uses Node 0 references, so the Terminator is compatible with that. Arpad was wondering if this could cause issues with including power delivery effects, with the Node 0 connection. Bob noted the RC construct is fixed in Terminator, so this limits the model's usefulness. Arpad noted option 1 is the easiest solution as long as everyone agrees that the Node 0 in the Terminator model is not a problem. - Discussion: BIRD194 (158) comments Arpad asked if this topic should be kept on the active discussion list. Radek thought we should keep it on the list. Michael had some questions last week on lab correlation that could be discussed further. -------------------------- Motion to Adjourn: Randy moved to adjourn. Radek seconded the motion. Arpad thanked everyone for joining. ------------- Next meeting: 29 May 2018 12:00pm PT ------------- IBIS Interconnect SPICE Wish List: 1) Simulator directives