Minutes from the 20 Aug 2013 ibis-atm meeting are attached. Mike
IBIS Macromodel Task Group
Meeting date: 20 August 2013
Members (asterisk for those attending):
Agilent: Fangyi Rao
* Radek Biernacki
Altera: David Banas
Julia Liu
Hazlina Ramly
Andrew Joy Consulting: Andy Joy
ANSYS: Samuel Mertens
* Dan Dvorscak
Curtis Clark
Steve Pytel
Luis Armenta
Arrow Electronics: Ian Dodd
Cadence Design Systems: Terry Jernberg
* Ambrish Varma
Kumar Keshavan
Ken Willis
Cavium Networks: Johann Nittmann
Celsionix: Kellee Crisafulli
Cisco Systems: Ashwin Vasudevan
Ericsson: Anders Ekholm
IBM: Greg Edlund
Intel: Michael Mirmak
Maxim Integrated Products: Mahbubul Bari
Hassan Rafat
Ron Olisar
Mentor Graphics: John Angulo
Zhen Mu
* Arpad Muranyi
Vladimir Dmitriev-Zdorov
Micron Technology: Randy Wolff
Justin Butterfield
NetLogic Microsystems: Ryan Couts
Nokia-Siemens Networks: Eckhard Lenski
QLogic Corp. James Zhou
SiSoft: * Walter Katz
* Todd Westerhoff
Doug Burns
* Mike LaBonte
Snowbush IP: Marcus Van Ierssel
ST Micro: Syed Sadeghi
Teraspeed Consulting Group: Scott McMorrow
* Bob Ross
TI: Casey Morrison
Alfred Chong
Vitesse Semiconductor: Eric Sweetman
Xilinx: Mustansir Fanaswalla
Ray Anderson
The meeting was led by Arpad Muranyi
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Opens:
- None
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Call for patent disclosure:
- None
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Review of ARs:
- Fangyi send updated BIRD 155.1 draft to Mike for posting.
- Done
- Mike contact Bapi to start discussion of BIRD 128 with Arpad
- Done
- Ambrish update BIRD 147 and send to Mike for posting
- Updated, not yet posted
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New Discussion:
Interconnect Task Group report:
Arpad reported that a meeting was held last week, lightly attended. He
encouraged anyone interested to join future meetings. Walter had conducted
a review of interconnect proposal status.
BIRD 150:
Arpad showed the latest update. Radek described the various changes made.
The BIRD is now written relative to the IBIS 6.0 candidate instead of
IBIS 5.1. Some section numbers have changed and rules for Usage Dep
have changed to say that any reserved parameter that can be Out can
be Dep. Todd asked if GetWave_Exists and Init_Returns_Impulse could be
returned by AMI_Resolve. Radek said no, those are Info. Todd asked if
this could be used for BIRD 160 parameters, even though those are Info.
Radek said those are not reserved, this rule is only about reserved.
Arpad showed BIRD 160.1. Todd said Tx_Rj could only be Info. Parameters
passed to [External Model] or [External Circuit] can only be In or
Info. There are different rules for .ami and non-.ami files. Todd
said models can have more than 3 corners and jitter can be corner
dependent. AMI_Resolve must be able to accommodate that. Radek said
we have to discuss what to do with reserved parameters. He asked what
to do with model specific Dep parameters. Ambrish said TStoneFile
could become reserved as in BIRD 160. Radek said AMI_Resolve results
should be passed to external circuits. Todd said he had assumed
AMI_Resolve would be called before channel extraction, but it appeared
Radek assumed otherwise.
Arpad showed the part of BIRD 155 that confirms Todd's assumption. Todd
described a scenario where the tool would have to choose one of four
on-die circuits based on corner. He said there would be no way for the
DLL to pass that out if it is Info. Radek suggested we could allow those
to be Dep. Arpad proposed that we would need another BIRD to extend BIRD
160 to allow usage Dep to be passed to circuits. Radek noted that this
could apply to Model_Specific. He suggested this might be written into
the AMI flow.
Arpad noted that a non-AMI model with circuit parameters could not have
dependencies resolved unless an AMI_Resolve-only DLL is allowed.
Bob wondered if the sentence about the Usage of dependent parameters
should be in other notes, above.
Arpad expressed the hope that we could review these changes and vote next week.
AR: Radek update BIRD 155.1 to use BIRD 160 language adjusted for IBIS 6.0
BIRD 147:
Ambrish showed BIRD 147 and described the recent changes. It is now
written relative to IBIS 6.0. Radek noted a grammatical error. Mike
asked if it would be posted with or without markup. Bob suggested the new
parameter Formats should not be limited to BCI files. Radek said there
should be separate discussion of AMI and BCI parameters. New Formats
are Bits and Bit_Pattern. Todd asked what this would be used for,
and suggested it should be defined for BCI only. Walter said only the
EDA tool generates a stimulus pattern, and it should be Info not In.
Ambrish said the example would need to be corrected. Walter suggested
this could be a set of tree branches instead of a new Format.
Ambrish suggested Walter could write that proposal.
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Next meeting: 27 August 2013 12:00pm PT
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IBIS Interconnect SPICE Wish List:
1) Simulator directives
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