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IBIS INTERCONNECT TASK GROUP
Mailing list: ibis-interconnect@freelists.org 

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Attendees from May 7, 2025 Meeting (* means attended at least using audio)

ANSYS                                Curtis Clark, Wei-hsing Huang, Juliano Mologni
Arista Networks			     Jim Antonellis
Broadcom                             James Church
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.

Michael reviewed the minutes of the April 30 meeting.  Arpad Muranyi noted that
there was an extra word in the sentence beginning with "Randy asked whether, for 
each of these, whether ...".  In addition, Michael noted that the word "suggested"
was misspelled. 

Arpad Muranyi moved to approve with corrections; Randy Wolff seconded.  The minutes 
were approved without objection.

Michael noted that he had a discussion with Pete Pupalaikis regarding his presentation 
on referencing and connections between different S-parameter networks; his presentation
also discussed connections to SPICE networks and conversions between SPICE and network
parameter data.  Michael took the AR to contact Pete about presenting at the upcoming
IBIS Summit.  [AR]

Michael stated that his notes from the previous meeting included an incomplete reference
to an AR regarding "(pin name, signal name, designator name.signal name), as well as 
*.signal name.  Michael took the AR to add text from pp. 391-392 of IBIS 7.2 for 
summary."  Should he copy the IBIS text into the Port Mapping draft?

Randy replied that the assignment was to make sure that the format is the same between
the two documents, including shortcuts with asterisks.

Michael asked if, for the Interconnect activity summary at the IBIS Summit, whether the
team had a specific request of the participants.  Review of the existing documents
was mentioned.

Michael took the AR to ask Steve Parker to update the Interconnect documents
on the IBIS website.  [AR] 

Arpad mentioned the issue of issuing SPIM as part of IBIS or as a separate specification.
He asked whether this should be raised as a question during the summit.  He noted that
the most recent IBIS-ATM meeting included questions on SI/PI co-simulation; should this
be supported in SPIM?  He added that this would "send us back to the drawing board", as 
SPIM excludes anything that resembles a signal.  No pads, buffers, or traces would be
described.  He asked whether industry is examining this as a serious option.

Michael asked whether this would be better included in the IBIS-ATM Task Group update.  
Arpad replied that such an update had not been planned, but could be added.

Walter Katz commented that he advocated discussion on SPIM being a separate specification, 
as IBIS is I/O-focused. Arpad added that co-simulation requires buffer information.  
Michael suggested this should be part of a discussion related to the ATM team's activities. 

Randy reviewed his changes to draft 13 of the port-mapping proposal.  Many of his changes focused
on clarifications to the examples. Inclusion of SPIM or PI features is still controversial 
for extensions and references.

There was some discussion regarding Example 3 of the draft, focused on the context and meaning
of Group and Reference.  Arpad noted that Group can be used for positive voltage supply or
ground (negative) references.

Randy asked whether the keyword "Physical" was needed for Group declarations.  Arpad replied
that "Reference" was intended only for Physical connections.

Michael noted that the next meeting time would conflict with the European IBIS Summit schedule,
and that several regular Interconnect attendees would be at the Summit.
Arpad moved to cancel the next meeting; Randy seconded.  The motion was approved without objection.

The next meeting is tentatively scheduled for May 21, 2025.