User's Manual
Table Of Contents
- Bookcase
- TABLE OF CONTENTS
- LIST OF FIGURES
- LIST OF TABLES
- About This Manual
- Chapter 1 Introduction
- Chapter 2 Command Dictionary
- Command Summary
- Command Descriptions
- Abort Interrupted Process
- Add Ambiguous Paths
- Add Atpg Constraints
- Add Atpg Functions
- Add Capture Handling
- Add Cell Constraints
- Add Cell Library
- Add Clocks
- Add Cone Blocks
- Add Control Points
- Add Display Instances
- Add Display Loop
- Add Display Path
- Add Display Scanpath
- Add Faults
- Add Iddq Constraints
- Add Initial States
- Add LFSR Connections
- Add LFSR Taps
- Add LFSRs
- Add Lists
- Add Mos Direction
- Add Net Property
- Add Nofaults
- Add Nonscan Handling
- Add Notest Points
- Add Observe Points
- Add Output Masks
- Add Pin Constraints
- Add Pin Equivalences
- Add Pin Strobes
- Add Primary Inputs
- Add Primary Outputs
- Add Random Weights
- Add Read Controls
- Add Scan Chains
- Add Scan Groups
- Add Scan Instances
- Add Scan Models
- Add Slow Pad
- Add Tied Signals
- Add Write Controls
- Analyze Atpg Constraints
- Analyze Bus
- Analyze Control
- Analyze Control Signals
- Analyze Drc Violation
- Analyze Fault
- Analyze Observe
- Analyze Race
- Analyze Restrictions
- Close Schematic Viewer
- Compress Patterns
- Create Initialization Patterns
- Create Patterns
- Delete Atpg Constraints
- Delete Atpg Functions
- Delete Capture Handling
- Delete Cell Constraints
- Delete Clocks
- Delete Cone Blocks
- Delete Control Points
- Delete Display Instances
- Delete Faults
- Delete Iddq Constraints
- Delete Initial States
- Delete LFSR Connections
- Delete LFSR Taps
- Delete LFSRs
- Delete Lists
- Delete Mos Direction
- Delete Net Property
- Delete Nofaults
- Delete Nonscan Handling
- Delete Notest Points
- Delete Observe Points
- Delete Output Masks
- Delete Paths
- Delete Pin Constraints
- Delete Pin Equivalences
- Delete Pin Strobes
- Delete Primary Inputs
- Delete Primary Outputs
- Delete Random Weights
- Delete Read Controls
- Delete Scan Chains
- Delete Scan Groups
- Delete Scan Instances
- Delete Scan Models
- Delete Slow Pad
- Delete Tied Signals
- Delete Write Controls
- Diagnose Failures
- Dofile
- Exit
- Extract Subckts
- Flatten Model
- Flatten Subckt
- Help
- Insert Testability
- Load Faults
- Load Paths
- Macrotest
- Mark
- Open Schematic Viewer
- Read Modelfile
- Read Procfile
- Read Subckts Library
- Redo Display
- Report Aborted Faults
- Report Atpg Constraints
- Report Atpg Functions
- Report AU Faults
- Report Bus Data
- Report Capture Handling
- Report Cell Constraints
- Report Clocks
- Report Cone Blocks
- Report Control Data
- Report Control Points
- Report Core Memory
- Report Display Instances
- Report Drc Rules
- Report Environment
- Report Failures
- Report Faults
- Report Feedback Paths
- Report Flatten Rules
- Report Gates
- Report Hosts
- Report Id Stamp
- Report Iddq Constraints
- Report Initial States
- Report LFSR Connections
- Report LFSRs
- Report Lists
- Report Loops
- Report Mos Direction
- Report Net Properties
- Report Nofaults
- Report Nonscan Cells
- Report Nonscan Handling
- Report Notest Points
- Report Observe Data
- Report Observe Points
- Report Output Masks
- Report Paths
- Report Pin Constraints
- Report Pin Equivalences
- Report Pin Strobes
- Report Primary Inputs
- Report Primary Outputs
- Report Procedure
- Report Pulse Generators
- Report Random Weights
- Report Read Controls
- Report Scan Cells
- Report Scan Chains
- Report Scan Groups
- Report Scan Instances
- Report Scan Models
- Report Seq_transparent Procedures
- Report Slow Pads
- Report Statistics
- Report Test Stimulus
- Report Testability Data
- Report Tied Signals
- Report Timeplate
- Report Version Data
- Report Write Controls
- Reset Au Faults
- Reset State
- Resume Interrupted Process
- Run
- Save Flattened Model
- Save Patterns
- Save Schematic
- Select Iddq Patterns
- Select Object
- Set Abort Limit
- Set Atpg Compression
- Set Atpg Limits
- Set Atpg Window
- Set AU Analysis
- Set Bist Initialization
- Set Bus Handling
- Set Bus Simulation
- Set Capture Clock
- Set Capture Handling
- Set Capture Limit
- Set Checkpoint
- Set Clock Restriction
- Set Clock_off Simulation
- Set Clockpo Patterns
- Set Contention Check
- Set Control Threshold
- Set Decision Order
- Set Dofile Abort
- Set Drc Handling
- Set Driver Restriction
- Set Fails Report
- Set Fault Mode
- Set Fault Sampling
- Set Fault Type
- Set Flatten Handling
- Set Gate Level
- Set Gate Report
- Set Hypertrophic Limit
- Set Iddq Checks
- Set Iddq Strobe
- Set Instancename Visibility
- Set Instruction Atpg
- Set Internal Fault
- Set Internal Name
- Set Interrupt Handling
- Set IO Mask
- Set Learn Report
- Set List File
- Set Logfile Handling
- Set Loop Handling
- Set Multiple Load
- Set Net Dominance
- Set Net Resolution
- Set Nonscan Model
- Set Number Shifts
- Set Observation Point
- Set Observe Threshold
- Set Output Comparison
- Set Output Mask
- Set Pathdelay Holdpi
- Set Pattern Source
- Set Possible Credit
- Set Procedure Cycle_checking
- Set Pulse Generators
- Set Race Data
- Set Rail Strength
- Set Ram Initialization
- Set Ram Test
- Set Random Atpg
- Set Random Clocks
- Set Random Patterns
- Set Random Weights
- Set Redundancy Identification
- Set Schematic Display
- Set Screen Display
- Set Self Initialization
- Set Sensitization Checking
- Set Sequential Learning
- Set Shadow Check
- Set Simulation Mode
- Set Skewed Load
- Set Split Capture_cycle
- Set Stability Check
- Set Static Learning
- Set Stg Extraction
- Set System Mode
- Set Test Cycle
- Set Trace Report
- Set Transition Holdpi
- Set Unused Net
- Set Workspace Size
- Set Xclock Handling
- Set Z Handling
- Set Zhold Behavior
- Set Zoom Factor
- Setup Checkpoint
- Setup LFSRs
- Setup Pin Constraints
- Setup Pin Strobes
- Setup Tied Signals
- Step
- System
- Undo Display
- Unmark
- Unselect Object
- Update Implication Detections
- View
- View Area
- Write Core Memory
- Write Environment
- Write Failures
- Write Faults
- Write Initial States
- Write Library_verification Setup
- Write Loops
- Write Modelfile
- Write Netlist
- Write Paths
- Write Primary Inputs
- Write Primary Outputs
- Write Procfile
- Write Statistics
- Write Timeplate
- Zoom In
- Zoom Out
- Chapter 3 Shell Commands
- Chapter 4 Test Pattern File Formats
- Chapter 5 Distributed FlexTest
- Appendix A Timing Command Dictionary
- Appendix B FlexTest WDB Translation Support
- INDEX
- Send us feedback
FastScan and FlexTest Reference Manual, V8.6_4
B-8
Using wdb2flex Effectively FlexTest WDB Translation Support
• wdb2flex resolves the state of bidirectional pins as either input or output
based on the state of the forces and results waveform associated with the
pin. If the forces waveform has a weak strength, the bidirectional is treated
as an output. If the results waveform has a weak strength, the bidirectional
is treated as an input. If neither forces nor results waveforms have a weak
strength and have the same logic values, the utility assumes wired behavior
and treats the bidirectional as an output. If none of the above conditions
prevail, the bidirectional is neither measured nor driven.
To ensure that the results of a QuickSim II simulation correspond with that of
FlexTest, the FlexTest test cycle should correspond to the wdb2flex control file.
You can set up the test cycle using the following steps and the example timing
illustration in Figure B-2:
1. Calculate the number of timeframes in the FlexTest test cycle. The number
should equal the sum of the control file input strobe times and clock strobe
times.
For the example in Figure B-2, if all inputs strobe at 75ns (time t1), all
clocks strobe active at 105ns (time t2), and all clocks strobe for the off-state
at 205ns (time t3), then there should be three timeframes in the test cycle.
The first timeframe (frame 0) corresponds to the time 0—105ns (t1,t2), the
second timeframe (frame 1) corresponds to the time 105—205ns (t2,t3) and
the third timeframe (frame 2) corresponds to the time 205—250ns (t3,
period). The time from 0—75ns is not considered since the stable output is
strobed at 95ns and all input events happen before 75ns.
2. Calculate the timeframe associated with each strobe time. In FlexTest,
when a force event and strobe event occur in the same timeframe, the strobe
event happens before the force event in that timeframe.
3. For all input pins, set up non-return pin constraints with an offset value
equal to one less than the timeframe at which the pin changes state. For the
example in Figure B-2, you would enter the following to indicate that the
offset value is 0; all inputs change at the first timeframe:
setup pin constraints nr 1 0