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IMIC DISCUSSION

Explore the latest on IBIS Version 3.2, BIRD57, Delay, and more at the IBIS Summit. Learn about IMIC evolution and its benefits for integrated circuits design. Discuss the merger of IBIS and SPICE, accuracy issues, and future features.

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IMIC DISCUSSION

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  1. IMIC DISCUSSION Bob Ross Interconnectix Business Unit Mentor Graphics Corporation IBIS Summit Meeting, San Diego, CA December 7, 1998

  2. 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

  3. 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

  4. 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)

  5. 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

  6. 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

  7. 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

  8. 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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