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FastScan and FlexTest Reference Manual, V8.6_4
2-34
Add Atpg Constraints Command Dictionary
• -Dynamic
An optional switch specifying that the tool only need satisfy the ATPG
constraints during the ATPG process and not during design rules checking.
You can change these constraints during the ATPG process, therefore, Design
Rules Checking (DRC) does not check these constraints. This is the default
behavior.
• -Static
An optional switch specifying that the tool (during all its processes) must
always satisfy the ATPG constraint you are defining. You can only add or
delete static ATPG constraints when you are in Setup mode, ensuring that the
tool uses the static ATPG constraints for all ATPG analyses during design
rules checking. DRC checks for any violations of ATPG constraints during the
simulation of the test procedures (rule E12).
• -NOCapclock_check (FastScan Only)
An optional switch specifying that the tool suppress checking of specified
ATPG constraints after the capture clock. By default, the tool checks ATPG
constraints at the same time as bus contention. If, and only if, the tool performs
contention checking after the capture clock, the tool also checks ATPG
constraints after the capture clock.
In some situations, you may have some ATPG constraints that do not need to
be checked after the capture clock, although you may want the tool to check
other constraints and bus contention after the capture clock. In this case, you
can use the -Nocapclock_check switch on certain constraints to suppress
checking of those constraints after the capture clock.
Examples
The following example creates a user-defined ATPG function and then uses it
when creating ATPG pin constraints:
add atpg functions and_b_in and /i$144/q /i$141/q /i$142/q
add atpg constraints 0 /i$135/q
add atpg constraints 1 and_b_in