[ibis-macro] Minutes from the 14 Jul 2009 ibis-atm meeting
- From: "Mike LaBonte (milabont)" <milabont@xxxxxxxxx>
- To: "IBIS-ATM" <ibis-macro@xxxxxxxxxxxxx>
- Date: Mon, 20 Jul 2009 17:36:04 -0400
Minutes from the 14 Jul 2009 ibis-atm meeting are attached.
Mike
IBIS Macromodel Task Group
Meeting date: 14 July 2009
Members (asterisk for those attending):
Adge Hawes, IBM
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
Chris McGrath, Synopsys
David Banas, Xilinx
Deepak Ramaswany, Ansoft
Donald Telian, consultant
Doug White, Cisco Systems
* Eckhard Lenski, Nokia-Siemens Networks
Essaid Bensoudane, ST Microelectronics
Fangyi Rao, Agilent
Ganesh Narayanaswamy, ST Micro
Gang Kang, Sigrity
Hemant Shah, Cadence Design Systems
Ian Dodd, consultant
Jerry Chuang, Xilinx
Joe Abler, IBM
* John Angulo, Mentor Graphics
John Shields, Mentor Graphics
Ken Willis, Cadence Design Systems
Kumar Keshavan, Sigrity
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
Samuel Mertens, Ansoft
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
Ted Mido, Synopsys
Terry Jernberg, Cadence Design Systems
* Todd Westerhoff, SiSoft
Vladimir Dmitriev-Zdorov
Vikas Gupta, Xilinx
Vuk Borich, Agilent
* Walter Katz, SiSoft
Zhen Mu, Cadence Design Systems
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Opens:
--------------------------
Call for patent disclosure:
- No one declared a patent.
-------------
Review of ARs:
- Arpad contact Cadence to check on making Model_Specific optional
- Done
- Ambrish replied
- Not sure if the reply has been relayed to the parser developer
- Arpad write a BIRD to clarify time period accuracy requirements
- TBD
- Todd: Write IBIS s-param BIRD
- Discussed today
- 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:
Todd discussed the IBIS-IS release with Synopsys:
- One update was suggested relative to referencing HSPICE
AR: Todd ask Synopsys about public posting of the document
Walter showed the IBIS-IS presentation for the IBIS Summit:
- Slide 3:
- Arpad: ICM may be sufficient over 1Gbps
- Walter: A 300 pin package would need an impractical s-param size
- We need sparse s-params for that
- Arpad: That is an ICM question
- Radek: The title of this slide can be changed a little
- Walter changed the slide title adding "for large systems operating at ..."
- Bob: Vendors make different claims about what can be handled
- Todd: We are not successful with what is available today
- John: ICM can handle >1 Gbps, but not with Touchstone
- Bob: It can be done with multi-lingual model
- Walter: IBIS can not even do it with 4 pins
- John: [External Circuit] can call s-param
- Walter: That is not IBIS compliant
- Arpad: We need to revisit this later
- We accepted the title as edited
- Slide 4:
- Walter: We should change "graciously agreed" to "we would like to thank"
- Todd: We don't need bullet 4
- Bullet 4 was deleted
- Todd: the (R) needs to be superscript
- Walter will deal with that later
- Slide 5:
- Arpad: The G element is listed twice
- Walter corrected this
- Slide 8:
- Mike: Maybe IBISISS should be IBIS-ISS
- Walter made this change
Todd: The web page makes it difficult to link to items
- Mike: It uses HTML frames
- This has been an annoyance for a while
- It can be recreated without frames
AR: Mike change web page to make items easily linkable
Walter showed the IBIS-ISS document:
- Page 24: Walter added a Scoping Rules section
- This is not from Synopsys
AR: Walter email updated IBIS-ISS document to list
Walter showed a list of Upcoming AMI BIRDs:
2: AMI Flow Issues:
- Arpad: There was a conflict between Cadence and SiSoft interpretation of
Use_Init_Output
- Arpad: Is the new feature digital or analog?
- Walter: It is analog
- The time of transition needs to be known though
- Todd: What to do with both Impulse Response and Time Domain behavior?
- This is completely different from digital input to Tx_GetWave
- Walter: Tx_GetWave input is the input to Rx
- Todd: Only if Use_Init_Output is true
- Todd: Tx_GetWave is handled as though the DFE is turned off
- The waveform is so bad you can't see transition boundaries
- It is not useful
3: Deprecate:
- Walter: The Format keyword needs to go away
- It is a redundant leaf name
- Bob: Deprecation can be a problem
- Are there any models using it?
- Walter:
- Walter: No need for separate Reserved and Model_Specific branches
- Bob: How to tell between them?
- Walter: It is reserved if it is one of the reserved names
- Todd: A misspelled Reserved_Parameter would be an error
- Bob: Are private parameters not understood by other vendors?
- Walter: Vendors have to document how to use private parameters
- Others are just info
- Arpad: What is the reason for not wanting 3C?
- Walter: Vendors have to decide which should be new Reserved_Parameters
- Arpad: Having the two allows for a quality check to find misspelled params
- Todd: That is not much of a check
- Todd: This gives a natural growth path for parameters to become reserved
- Files will still work as-is once parameters become reserved
- Mike: 3C probably seemed like a good idea at the time, but doesn't buy much
- Todd: Having 3C does not block us, but has a negative impact
- Bob: Having only Reserved Params would leave us always behind
4: AMI Structural Enhancements:
- Bob: Would env variables be platform specific?
- Walter: All operating systems have env variables
5: Computed Parameters:
6: New Reserved Parameters:
Arpad: The IBIS Summit is July 28:
- Bob: The presentation needs to have the date fixed
Bob: Are these changes enough to ask the parser contractor to stop?
- Arpad: How long before these BIRDs come through?
- Walter: It should start as soon as IBIS-ISS is done
- Arpad: IBIS 5.1 may come up before long
- Bob: It may be a year from now
- Arpad: Any changes should be made before many models become entrenched
Arpad: Are we done with IBIS-ISS after it is shown to the IBIS Open Forum?
- Bob: We can upload to the IBIS web site and leave it for a while
Next meeting: 21 July 2009 12:00pm PT
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IBIS Interconnect SPICE Wish List:
1) Simulator directives
Other related posts:
