Command Dictionary Add Control Points
FastScan and FlexTest Reference Manual, V8.6_4 2-51
Add Control Points
Tools Supported: FastScan
Scope: Atpg, Fault, and Good modes
Usage
ADD COntrol Points pin_pathname... [-Type {Xor | And | Or}] [-Group]
Description
Adds control points to output pins.
The Add Control Points command adds control points to the output pins of cells.
After you issue this command, the tool discards all of the patterns in the current
scan test pattern set. After insertion, the tool discards the current fault list, so you
must recreate the fault list if you wish to perform additional fault simulation. If
you enter the Setup mode, the tool deletes any control points you added.
Moreover, you cannot generate test patterns after adding control points.
When you add a control point, the output pins are exclusive-ORed (Xor), ANDed
(And), or ORed (Or) with random values to create the control effect. The default
is exclusive-OR. You can evaluate the effect of any added controllability by using
the Analyze Control or Set Random Patterns commands.
You use Add Control Points primarily for simulating Built-In Self Test (BIST)
circuitry.
Arguments
•pin_pathname
A required repeatable string that lists the cell output pins to which you are
adding control points.
•-Type Xor | And | Or
An optional switch and literal pair that specifies the type of control effect you
want to apply to the control points. The following lists the control effect types
available:
Xor — A literal specifying that FastScan perform an exclusive-OR of the
cell output pins and random values. This is the default.