============================================================================== IBIS INTERCONNECT TASK GROUP Mailing list: ibis-interconnect@freelists.org ============================================================================== Attendees from February 18, 2026 Meeting (* means attended at least using audio) ANSYS Curtis Clark, Wei-hsing Huang, Juliano Mologni Arista Networks Jim Antonellis Broadcom James Church Chipletz Stephen Newberry* Intel Corp. Michael Mirmak*, Xiaoning Ye Keysight Technologies Ming Yan Marvell Steve Parker MathWorks Walter Katz Micron Technology Justin Butterfield Siemens EDA Weston Beal, Arpad Muranyi*, Randy Wolff* Simberian Yuriy Shlepnev ST Microelectronics Aurora Sanna Synopsys Ted Mido, Edna Moreno University of Illinois Jose Schutt-Aine ============================================================================== Michael Mirmak convened the meeting. No patents were declared. During review of the January 28 minutes, Michael noted that Arpad Muranyi had found two issues which he mentioned on the reflector: “- "non-zero" should be altered to cover negative values” should probably be “exclude” “Arpad requested that the negative symbols *in comments* be placed in single or double quotes.” In addition, Arpad observed that the string "backed into'\" appeared (the '\ character string should not appear). Arpad moved to approve the minutes with the changes discussed; Randy Wolff seconded. The minutes were approved without objection. Arpad noted that he had completed his AR regarding the policy toward wildcards in IBIS Interconnect. He found that the [IBIS Interconnect Model] keyword does not support the wildcard syntax inside IBIS. IBIS only allows 1:1 pin-to-pad connections. Wildcards are only supported in EMD. One can implement single-die splits for power/ground. Randy added that wildcards are only for multiple reference designators at one time. Arpad replied that this is only possible in EMD. Michael reviewed the changes in draft 27 of the Port Mapping proposal. Arpad asked about change tracking, as not all previously-noted issues were corrected. Michael replied that not all changes had been implemented. Michael asked whether "Physical" is required for Data_usage ports. Randy replied that it is used only as part of a complete declaration. The team agreed that "Groups" should not be supported for signals. Arpad raised address lines in memory as an example of an application for wildcards. Group names expand a connection from a Port to multiple pins. This is a form of delegating or replacing a list of multiple pins connecting over separate lines. Michael commented on the use of names for references. Randy noted the use of names as labels throughout the document. Physical definitions should use reference designators. Arpad asked whether this naming was intended to be a macro substitution. Michael replied that he was not referring to a macro substitution for references, but whether references could be an actual terminal name. Randy noted that the current example on page 6 is fine, as a probe description. He asked about Data_usage being used to determine reference designator parsability (e.g., C_comp_model). Arpad initially noted that reference designators were only supported for PCBs, but withdrew that statement during discussion of packages. Michael noted that C_comp_models only support reserved names. He explained the clarifications in the draft related to "designator". Arpad noted that, on the external side of an EMD, you don't have refdes indicators, but on the inside connection point, you do. Randy replied that two components with reference designators would be (non-EMD) structures using refdes. An example would be two circuit boards with a connection between components. Designator is defined in IBIS EMD. Arpad asked about connecting an S-parameter between two dice, without using the pins. EMD does not support this structure. Randy replied that we do have an example for this case in IBIS for EMD. Randy stated that we will need to clean up the IBIS Interconnect parameters at the bottom of page 8 of the draft, as some names don't match what's actually in IBIS Interconnect in 8.0 (specfically for buffer_IO). See table 49 in IBIS 8.0 for details. Michael took the AR to reconcile these. [AR] Arpad took an AR to provide a corrected version of the IBIS-ISS connections shown in Port Mapping Example 5. [AR] Arpad moved to adjourn; Randy seconded. The meeting adjourned without objection.