Command Dictionary Set Output Mask
FastScan and FlexTest Reference Manual, V8.6_4 2-543
Set Output Mask
Tools Supported: FlexTest
Scope: All modes
Usage
SET OUtput Mask OFf | ON
Description
Specifies how FlexTest handles an unknown (X) state in an external pattern set.
The Set Output Mask command allows you to specify for FlexTest to ignore
external patterns with unknown states. This is useful if your external pattern set
contains patterns with an output pin value of X which is meant to show that
FlexTest is not measuring that output pin at the specified time.
You can use the Report Environment command to display the current setting of
the output mask.
Arguments
•OFf
A literal that specifies for FlexTest to give possible credit for fault effects that
reach a pin which the external pattern set specifies as being at an unknown
value. This is the default behavior upon invocation of FlexTest.
•ON
A literal that specifies for FlexTest to mask the simulated output pin value with
an X for external patterns that contain an unknown state. So, for that pattern,
FlexTest does not give credit for any stuck-at fault effects that reach a pin that
is at the unknown state.
Examples
The following example enables FlexTest to mask the output pins of external
patterns that contain an unknown state:
set output mask on