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

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Attendees from August 28, 2024 Meeting (* means attended at least using audio)

ANSYS                                Curtis Clark, Juliano Mologni
Broadcom                             James Church
Intel Corp.                          Michael Mirmak*
                                     [Michael Brownell]
					Xiaoning Ye
Keysight Technologies                Ming Yan
Marvell                              Steve Parker
MathWorks                            Walter Katz*
Micron Technology                    Justin Butterfield
Siemens EDA                          Weston Beal, Arpad Muranyi*, Randy Wolff
ST Microelectronics                  Aurora Sanna
Synopsys                             Ted Mido, Edna Moreno
University of Illinois               Jose Schutt-Aine
Zuken USA                            Lance Wang*

Michael Mirmak called the meeting to order.  No patents were declared.

During review of the minutes, Arpad Muranyi moved to approve the minutes.  
Lance Wang seconded the motion.  The minutes were approved without objection.

During the AR review, Arpad noted that his AR from the last meeting was still 
open.  He asked about meeting recordings and the timeline for keeping the 
recordings.  Michael replied that one could establish a retention policy.
The ultimate goal is not to keep the recordings at all, but to use the
transcribed recordings to enable AI to produce summaries and minutes.

Michael reviewed the port mapping draft, focusing on port/diff_port corrections 
from the last meeting.  While the example was corrected, there was some discussion
of "Net" and its meaning.  Extended net, according to Walter Katz, has a series 
device between two separate nets (with different names). 

On case sensitivity: Arpad noted that keywords are insensitive but parameters 
are sensitive in IBIS. Michael took the AR to find out about case sensitivity in 
Touchstone.  

Michael noted that the team needs to sort out "subparameter" vs. "parameter" 
definitions in the text.  Arpad added that the difference between "Side" and 
"Left_side", etc. is unclear.  Walter suggested that one could change the 
text to Left_symbol, etc.  IEEE 370 uses a table of Left Side and Right Side 
for cable/connector identifiers, matrix-style.  This is similar to NNFF 
terminology, for instance.  Michael added that Side is a grouping mechanism 
for topology descriptions, not schematics.

Michael asked about S and P being missing.  Example 3 is closest to using 
all features.  Walter stated that GNDs are automatically rails.  Example 5 
is in error: VDD should use Type P.  

Arpad asked about Vtt with terminations: how are these to be interpreted?  
Walter stated that they should be identified as P.  Michael asked whether both 
sides of a Vtt-connected resistor are P.  Arpad replied that one side is P, and 
one side is S.    

The team discussed which parameters are required for Ports, including Net.
Michael asked whether at least two ports should be required to be associated 
with each net.  Arpad asked whether one can have a dead-end net.  Michael
noted that Diff_port is the only exception.

Arpad asked whether, if Logical is not present, whether nothing would show 
up in an associated schematic.  Michael confirmed this would be true.  Walter
suggested one could also use Physical, but also use Side:Net.

Arpad added that he was concerned about "Logical" identifiers really being 
Symbol_label, Schematic_label, or something similar.  He added that we had two 
usage cases for these labels: one was labeling for connectivity to the outside world 
(functional).   The other is just for label/naming purposes.  Connectivity relates to 
only the functional side.  Arpad accepted an AR to provide revised label suggestions.
[AR]

In the next meeting, the team will review the use of references in Example 3, plus
Group numbering.  

Arpad moved to adjourn the meeting.  Lance seconded.  The meeting adjourned without
objection.

The next meeting will be held September 3, 2024. 


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Bin List:
1)	Complete port naming proposal (Katz et al) 
2)	Complete/revise Touchstone 3.0 draft outline (Mirmak) 
3)	Complete ISS-IRD 1 Draft - enable cascading of S-parameters through 
        W-element (Mirmak) - TABLED

Tabled ARs:
- Arpad to give an example of the physical connectivity needed for EMD 
automation.