Minutes, IBIS Quality Committee 03 May 2011 11:00-12:00 EST (08:00-09:00 PST) ROLL CALL Cisco Systems: * Mike LaBonte Ericsson: * Anders Ekholm Green Streak Programs: Lynne Green Huawei Technologies: Guan Tao IBM: Bruce Archambeault IOMethodology: * Lance Wang Mentor Graphics: John Angulo Micron Technology: Moshiul Haque, Randy Wolff Nokia Siemens Networks: * Eckhard Lenski Signal Consulting Group: Tim Coyle Teraspeed Consulting Group: * Bob Ross Texas Instruments: Pavani Jella Everyone in attendance marked by * NOTE: "AR" = Action Required. -----------------------MINUTES --------------------------- Mike LaBonte conducted the meeting. Call for opens and IBIS related patent disclosures: - No one declared a patent. - Mike: Anders will not have an IQ presentation at the upcoming summit - Bob: There will be a presentation on test loads for QA - Anders' presentation will be a back up in case of a no show AR Review: - Study [External Circuit] for possible reuse in test section - Done New items: Mike: Did the External Circuit ISS BIRD pass? - Bob: Not yet Mike showed the [IBIS 5 spec [External Circuit] section - Bob: This is a top level keyword - The call keyword is [Circuit Call] - The node names are positional - Mike: [Pin Mapping] technically could be used in parallel with [External Circuit] - Bob: That is for power connections - IBIS specification page 101 has a table of reserved port names - It can hook up power nodes, for example - Mike: It is a complication that this table applies to both [External Model] and [External Circuit] - Bob: We should treat [External Circuit] as not using any of these names - They were designed with [External Model] in mind - Mike: We should decide if we can use [External Model] Anders: Do we really want to support all of these languages? - Mike: How much simulator support is there for the AMS languages? - Bob: Vendors tend to each support mostly one AMS language - Anders: In test data we should support only ISS - We could still use the [External Circuit] keywords, but limited to ISS - Lance: We should have another keyword, not [External Circuit] - Bob: Agree - This is for on-die structures - Mike: The development of [External Circuit] would be constrained if it had two uses - Someone has proposed adding the B element to [External Circuit] - Anders: We seem to agree not to use [External Circuit] - Mike: We could use some of it's language - Bob: That might complicate things - Digital ports require things like A-to-D and D-to-A converters - Anders: We don't need that here - Mike: [External Test] should work even where [External Model] and [External Circuit] are used - Bob: Some have people have misused [External Circuit] as a package model - It is supposed to be used in conjunction with a separate package model Mike: We could use the diagram on page 136 as a reference - Should we allow use of D_enable and D_receive? - IBIS does not have tables for enable on/off transitions - Bob: Some buffers are designed to switch using enable - Anders: We have no digital controls - Mike: Our stimulus patterns are digital controls - Anders: You can't hook the output of one buffer to the input of another - Bob: The EDA tools provide that - Mike: It would be best to not bypass the simulators' normal operation Anders: Are there any models using [External Model] or [External Circuit]? - Lance: Cadence wraps models in DML language - Bob: Syed at Cisco may be using VHDL-AMS - It will usually be somewhat vendor specific Mike showed External_Test.doc: - Mike: This has become messy, but we should continue working on it - It uses two different ways to express typ/min/max corners - Anders: Since this will be external to IBIS the ISS content could be here - Mike: It would be good to allow content either here or external AR: Mike update External_Test.doc Next meetings: - The European summit is May 10, we will skip that week - Next meetings May 17 and May 24 May 17 agenda: - Review external test BIRD draft Meeting ended at 12:17 Eastern Time.