Command Dictionary Set Abort Limit
FastScan and FlexTest Reference Manual, V8.6_4 2-425
FlexTest Specifics
The Set Abort Limit command specifies three ways for the test pattern generator
to abort a target fault. One way is to set the maximum number of conflicts that the
test pattern generator allows before aborting a target fault. The second way is to
set the maximum number of test cycles that the generator allows before aborting a
target fault. The third way is to set the maximum CPU time (in seconds) that the
test pattern generator can run before aborting a target fault.
If any of these limits are too low, the test pattern generator may abort many faults
and fault coverage could be too low. However, if the limits are too high, it may
take too much time to finish the test generation of a circuit. The invocation
defaults are 30 conflicts, 300 test cycles, and 300 seconds. If you enter the
command without any options, then the test pattern generator uses the default
-Backtrack value.
Arguments
•comb_abort_limit (FastScan only)
An required integer that specifies the maximum number of conflicts for each
target fault that the test pattern generator allows during the combinational test
generation process. The default is 30.
If you set the combinational abort limit to 0 and the test pattern generator can
perform clock sequential test generation, the generator does not perform
combinational test generation.
•seq_abort_limit (FastScan only)
An optional integer that specifies the maximum number of conflicts for each
target fault that the test pattern generator allows during the clock sequential
test generation process. The default is the current comb_abort_limit default.
If you set the sequential abort limit to 0, the test pattern generator does not
perform clock sequential test generation.
•-Backtrack integer (FlexTest only)
An optional switch and positive, greater-than-0 integer pair that specifies the
number of conflicts that the test pattern generator allows before aborting the
target fault. If you enter the command without specifying any option, the
command uses the current -Backtrack value. The invocation default is 30
conflicts.