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IMIC DISCUSSION. Bob Ross Interconnectix Business Unit Mentor Graphics Corporation IBIS Summit Meeting, San Diego, CA December 7, 1998. IBIS Status Update. JEDEC/IBIS Meeting New Requirements& Needs IMIC ( I /O Interface M odel for Integrated C ircuits) IBIS Version 3.2

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IMIC DISCUSSION

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Imic discussion

IMIC DISCUSSION

Bob Ross

Interconnectix Business Unit

Mentor Graphics Corporation

IBIS Summit Meeting, San Diego, CA

December 7, 1998


Ibis status update

IBIS Status Update

  • JEDEC/IBIS Meeting

    • New Requirements& Needs

    • IMIC (I/O Interface Model for Integrated Circuits)

  • IBIS Version 3.2

    • Delay, Expected January 15, 1998 Ratification Vote

    • BIRD57 (for Bus Hold/Active Termination Extension)

      • Consideration on December 18, 1998

      • ibischk3.2 parser change

  • DesignCon99 IBIS Summit February 1, 1999

    • Accuracy Issues, Future Features, Booth


Why consider imic

Why Consider IMIC?

  • Started 1996 to Enhance IBIS Version 2.1 by EIAJ I/O Project Modeling Group

  • Targeted to Future Needs, Protect Process, Expand to New Device Architectures

  • Mixture of IBIS and SPICE

  • IBIS/EIAJ Meetings/Presentations 2/97, 6/97, 1/98, 6/98, 10/98

  • London IEC Meeting - Why IBIS & IMIC?

  • POSSIBLE SOLUTIONS TO IBIS LIMITATIONS


Brief imic overview

Brief IMIC Overview

  • EIAJ Slides From Older Presentations (separate package)

    • Standard: http://tsc.eiaj.or.jp/tsc/SSC/iopg.htm

  • EIAJ Overview

    • Level 1: Signal Integrity

    • Level 2: Power Integrity

    • Level 3: Future EMI

  • Scope

    • Module (IBIS EBD)

    • IC (IBIS Component & Models)

    • Package (IBIS Package)


Brief imic overview cont d

Brief IMIC Overview Cont’d

  • Missing Information for Digital Simulators

    • Model Type (must derive from other information)

    • Specs for Thresholds, Overshoots, Timing, etc.

    • Some Connection Information (explicit differential pins, ground/power relations, etc.)

  • IMIC: IBIS, SPICE & Table SPICE

    • Buffer Models - Table SPICE Construction

    • Package/Module Models SPICE & .SUBCKT Calls

    • IBIS Style Shell

    • SPICE PWL Stimulus

    • TYP, SLOW, FAST Packages, Buffers, Stimulus


Ibis imic options

IBIS/IMIC Options

  • Merge

    • Complicates Well Accepted IBIS

    • Unacceptable Sacrifices in IBIS of IMIC

    • Actual Dual Support by EDA Vendors

  • Link

    • Leverage IBIS Specification & Acceptance & IMIC Package, Buffer Details

    • IBIS “Submodel” & Package Extension?

  • Be Independent

    • Translator Path: IMIC to IBIS


Linkage discussions

Linkage Discussions

  • Package Model Linkage

    • IMIC Spice - Provides Format Convention

      • Supports FAST, SLOW, TYP Packages

    • Standard Spice

  • Table Spice For Buffers

    • Buffers by Construction for New Features

      • May Be Proprietary

      • May Be Complicated - Behavioral Approach in IBIS Extensions May Still Be Adequate

    • Single Complete Model by Construction & Scaling

    • Accuracy Details


Discussion

Discussion

  • Study Group Participants

    • Stephen Peters, Raj Raghuram, Norio Matsui, Bob Ross

    • Others Welcome

  • Issues

    • Complexity

    • Support (IC & EDA Vendors)

    • Simulation Speed

    • Accuracy

    • Logistics

    • Incompatibilities?


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