FastScan and FlexTest Reference Manual, V8.6_4
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Delete Atpg Constraints Command Dictionary
Delete Atpg Constraints
Tools Supported: FastScan and FlexTest
FastScan Scope: All modes
FlexTest Scope: Atpg, Good, and Fault modes
Prerequisites: You can only delete constraints added with the Add Atpg
Constraints command.
Usage
For FastScan
DELete ATpg Constraints {pin_pathname | gate_ID# | function_name}... | -All
For FlexTest
DELete ATpg Constraints {pin_pathname | net_pathname | gate_ID# |
function_name}... | -All
Description
Removes the state restrictions from the specified objects.
The Delete Atpg Constraints command allows you to delete restrictions on pins
defined with the Add Atpg Constraints command. During the ATPG process, the
tool adheres to any of the state restrictions which you do not delete.
FastScan Specifics
If you change ATPG constraints, create patterns with those changed constraints,
and then compress patterns, FastScan rejects all patterns not meeting the new
constraints. This can cause FastScan to reject good patterns created with the old
constraints. Therefore, you should use the Delete Atpg Constraints command to
remove all ATPG constraints before compressing the pattern set.
Arguments
•pin_pathname
A repeatable string that specifies the pathname of the pin from which you want
to remove any ATPG pin constraints.