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

Source III, Inc.
Vector data translation for Simulation & Test
John Cosley
VTRAN overview
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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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Numerous formatters for testers & EDA
 STIL, WGL, Credence, Teradyne, Agilent,
IMS, …
© 2002 Synopsys, Inc. (2) CONFIDENTIAL
VTRAN Flow
VTRAN
Tools
ATPG
Simulators
Vector
Formats
VCD
WGL
STIL
…
OVF
TVF
Original
Vector File
Target
Vector File
Test Program
Credence
Teradyne
Agilent . . .
Circuit Simulator
Nassda HSIM
Synopsys
TimeMill
PowerMill
NanoSim . . .
Processing
Verilog/VHDL
Testbench
STIL
WGL …
Command
File
© 2002 Synopsys, Inc. (3) CONFIDENTIAL
VTRAN’s EDA-IP
© 2002 Synopsys, Inc. (4) CONFIDENTIAL
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
© 2002 Synopsys, Inc. (5) CONFIDENTIAL
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, …
© 2002 Synopsys, Inc. (6) CONFIDENTIAL
Current Status
• STIL reader (1450-1999) in use today in
conjunction with TetraMAX – tested with files
from Mentor Fastscan and IBM Testbench
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STIL reader .1 support under development
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Limitations
STIL writer in use today at several customer
sites
 Some reader syntax not implemented as yet –
InheritWaveform, SubWaveforms, Multi-bit
data.
© 2002 Synopsys, Inc. (7) CONFIDENTIAL
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).
© 2002 Synopsys, Inc. (8) CONFIDENTIAL
Future STIL plans
• Implement remaining .1 features – at least
those being used by ATPG vendors
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Continue enhancements on Waveform
mapping
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Implement InheritWaveform and Multi-bit data
Continue verification with STIL files from
more vendors
© 2002 Synopsys, Inc. (9) CONFIDENTIAL