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Source III, Inc.

Source III, Inc. John Cosley. Vector data translation for Simulation & Test. VTRAN overview. Bridging simulation & test formats Focused on ATPG-generated translations Comprehensive processing options Large number of canned readers STIL , WGL, VCD, TDL_91, …

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Source III, Inc.

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  1. Source III, Inc. John Cosley Vector data translation for Simulation & Test

  2. VTRAN overview • Bridging simulation & test formats • Focused on ATPG-generated translations • Comprehensive processing options • Large number of canned readers • STIL, WGL, VCD, TDL_91, … • Numerous formatters for testers & EDA • STIL, WGL, Credence, Teradyne, Agilent, IMS, …

  3. Test Program Credence Teradyne Agilent . . . Circuit Simulator Nassda HSIM Synopsys TimeMill PowerMill NanoSim . . . VTRAN Flow VTRAN Vector Formats VCD WGL STIL … OVF Original Vector File TVF Target Vector File Tools ATPG Simulators Processing Verilog/VHDL Testbench STIL WGL … Command File

  4. VTRAN’s EDA-IP

  5. STIL application overview • Vtran’s STIL Reader • Support for 1450-1999 • Partial (evolving) support for .1 extensions • User programmable ; flatten scan or not, flatten loops or not, flatten timing or not, pass Annotations or not, . . . • Procedures & Macros expanded • Simplifies translations by providing data access rather than just structural access

  6. STIL application overview • Vtran’s STIL Writer • 1450-1999 syntax • Full support for scan Shift and Loops • User specified Signal groupings for file size and performance optimization • Numerous data processing options available to user – e.g. signal masking, customized state translations, signal name ALIASing, …

  7. Current Status • STIL reader (1450-1999) in use today in conjunction with TetraMAX – tested with files from Mentor Fastscan and IBM Testbench • STIL reader .1 support under development • STIL writer in use today at several customer sites • Limitations • Some reader syntax not implemented as yet – InheritWaveform, SubWaveforms, Multi-bit data.

  8. STIL Technical Issues • High degree of syntax flexibility (complexity) opens the door to “unmappable” constructs. E.g Waveforms, scan Shift blocks, … • Context-sensitive syntax requires more software intelligence (processing/time).

  9. Future STIL plans • Implement remaining .1 features – at least those being used by ATPG vendors • Continue enhancements on Waveform mapping • Implement InheritWaveform and Multi-bit data • Continue verification with STIL files from more vendors

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