Command Dictionary Add Atpg Constraints
FastScan and FlexTest Reference Manual, V8.6_4 2-33
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A literal that restricts the named object to a low state, high state, or high
impedance state, respectively.
The following lists the four methods for naming the objects on which you wish to
place the constraint. You can use any number of the four argument choices, in any
order.
•pin_pathname
A repeatable string that specifies the pathname to the pin on which you are
placing the constraint.
•net_pathname (FlexTest Only)
A repeatable string that specifies the pathname of the net on which you are
placing the constraint. You cannot put ATPG constraints on a net in any library
modules.
•gate_id#
A repeatable integer that specifies the gate identification number of the gate
you wish to constrain.
•function_name
A repeatable string that specifies the name of a function you created with the
Add Atpg Functions command. If you place a constraint on an ATPG function
(that you generated with the Add Atpg Function -Cell command), then the tool
also constrains all cells affected by that ATPG function. You can delete all
these constraints using the function_name argument with the Delete Atpg
Constraints command.
•-Cell cell_name {pin_name | net_name (FlexTest Only)}
A repeatable switch with a corresponding string pair that specifies the name of
a DFT library cell and the name of a specific net (FlexTest Only) or pin on that
cell. You can repeat the pin_name or net_name argument if there are multiple
pins or nets on a cell that you need to constrain.
If you use the -Cell option, the tool places an ATPG constraint on every
occurrence of that cell within the design. However, there is no -Cell option to
the Delete Atpg Constraints command, so you can either delete them
individually or delete all the ATPG constraints.