[ibis-macro] Minutes from the 2 sep 2008 ibis-atm meeting
- From: "Mike LaBonte (milabont)" <milabont@xxxxxxxxx>
- To: "IBIS-ATM" <ibis-macro@xxxxxxxxxxxxx>
- Date: Mon, 8 Sep 2008 18:08:16 -0400
Minutes from the 2 sep 2008 ibis-atm meeting are attached: ARs:
AR: Walter send IBIS Interconnect SPICE document to Michael M and Todd
Mike
IBIS Macromodel Task Group
Meeting date: 02 September 2008
Members (asterisk for those attending):
Ambrish Varma, Cadence Design Systems
* Anders Ekholm, Ericsson
* Arpad Muranyi, Mentor Graphics Corp.
Barry Katz, SiSoft
* Bob Ross, Teraspeed Consulting Group
Brad Brim, Sigrity
Brad Griffin, Cadence Design Systems
David Banas, Xilinx
Donald Telian, consultant
Doug White, Cisco Systems
Essaid Bensoudane, ST Microelectronics
Fangyi Rao, Agilent
Ganesh Narayanaswamy, ST Micro
Gang Kang, Sigrity
Hemant Shah, Cadence Design Systems
Ian Dodd, Agilent
Joe Abler, IBM
* John Angulo, Mentor Graphics
John Shields, Mentor Graphics
Ken Willis, Cadence Design Systems
Kumar
Lance Wang, Cadence Design Systems
Luis Boluna, Cisco Systems
* Michael Mirmak, Intel Corp.
* Mike LaBonte, Cisco Systems
Mike Steinberger, SiSoft
Mustansir Fanaswalla, Xilinx
Patrick O'Halloran, Tiburon Design Automation
Paul Fernando, NCSU
* Pavani Jella, TI
* Radek Biernacki, Agilent (EESof)
Randy Wolff, Micron Technology
Ray Comeau, Cadence Design Systems
Richard Mellitz, Intel
Richard Ward, Texas Instruments
Sam Chitwood, Sigrity
Sanjeev Gupta, Agilent
Shangli Wu, Cadence Design Systems
Sid Singh, Extreme Networks
Stephen Scearce, Cisco Systems
Steve Pytel, Ansoft
Syed Huq, Cisco Systems
Syed Sadeghi, ST Micro
* Terry Jernberg, Cadence Design Systems
* Todd Westerhoff, SiSoft
Vikas Gupta, Xilinx
Vuk Borich, Agilent
* Walter Katz, SiSoft
Zhen Mu, Cadence Design Systems
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Opens:
- Arpad suggested we address the question of what EMD/EBD is supposed to solve
--------------------------
Call for patent disclosure:
- No one declared a patent.
-------------
Review of ARs:
- Walter add general assumptinons/rules section to IBIS-SPICE proposal
- Done
- David Banas report Xilinx position on LTI assumption for SerDes
- No update
- Arpad: Write parameter passing syntax proposal (BIRD draft)
for *-AMS models in IBIS that is consistent with the
parameter passing syntax of the AMI models
- TBD
- TBD: Propose a parameter passing syntax for the SPICE
- [External ...] also?
- TBD
- Arpad: Review the documentation (annotation) in the macro libraries.
- Deferred until a demand arises or we have nothing else to do
-------------
New Discussion:
Walter shared the document "IBIS Interconnect Spice"
- "Interconnect" is in the name because that is the scope.
- This is copied from the HSPICE manual, but the PDF does not copy well.
- Expressions may not contain node names.
- Should we allow named versions of positional values?
- Vxxx node1 node2 0
- Vxxx node1 node2 V=0
- The "variable name equals" format will be allowed but optional.
- Arpad: Is V a correct name?
- HSPICE allows VOL= and DC=
- We must use whatever HSPICE defines
- On T element TD= stands for "time per distance"
- Multiplies L= which defaults to meters
- Should we support L=?
- The only controlled source documented so far is E
- Not sure if the E Laplace format is needed
- Not sure what the E Foster format is
- Most s-param parameters may not be needed
- Not sure if L= value for W element makes sense
- Bob: Is .model included?
- Yes, but specifically for S and W elements
- RLGCFILE is used for W element, .model is not used
- Radek: The table model can also be in an external file
- Arpad: Should we support pole-zero?
- Walter: Not recommended, but there are some requests for this
- Our SPICE should support it
- Walter: S param data is transfer function data
- Fourier transfer functions with real and imaginary
- Would rather have this than E, F, G, H
- We could require a Touchstone 3 file
- E element sometimes used for pole-zero crosstalk modeling
- Some people like to see pole-zero format for simple analyses
- It allows for easy comparison of simulators, for example.
- Michael M: We need to decide whether to drop the items in red
- Red items are probably not needed for interconnect
- Todd: This conveys what we are asking of Synopsys
- We could waste time refining this, and then they might turn down our
proposal anyway.
- Michael M: This just needs cleanup before presentation to Synopsys.
- Whatever we use should be taken literally, not modified.
- The word "HSPICE" should not appear in the document.
- Arpad: Will Synopsys be concerned about their competitors seeing this?
- Walter: Their competitors already have access
- Maybe we should not post this on our website yet
- Michael M: We should at least confirm that this is already online
- Radek: We should clarify for Synopsys what changes we are making.
- Michael M: We should invite Synopsys to attend a meeting
- Bob: We might include "This was donated by Synopsys"
- Walter: If we add new things to this it could become "interesting"
- They may implement the same thing in a different way
- Todd: Like the macro language, translators can be used
- Michael M: Our spec should stand alone, no connections to anything else
- Bob: We might want to use a 2008 version as our reference.
AR: Walter send IBIS Interconnect SPICE document to Michael M and Todd
Refining the set of elements for IBIS-SPICE
Next meeting: 09 September 2008 12:00pm PT
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