Mentor v8.6_4 User Manual
Command Dictionary
Set Z Handling
FastScan and FlexTest Reference Manual, V8.6_4
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Set Z Handling
Tools Supported: FastScan and FlexTest
Scope: Setup mode
Usage
SET Z Handling {Internal state} | {External state}
Description
Specifies how the tool handles high impedance signals for internal and external
tri-state nets.
tri-state nets.
The Set Z Handling command specifies how to handle the high impedance state
for internal and external nets. If the high impedance value can be made to behave
as a binary value, certain faults may become detectable. If you do not use this
command to set the Z handling, the default value is X.
for internal and external nets. If the high impedance value can be made to behave
as a binary value, certain faults may become detectable. If you do not use this
command to set the Z handling, the default value is X.
Arguments
•
Internal state
A literal pair that specifies how the tool handles high impedance values for
internal tri-state nets. The literal choices for the state option are as follows:
internal tri-state nets. The literal choices for the state option are as follows:
X — A literal that specifies to treat high impedance states as an unknown
state. This is the default behavior upon invocation of the tool.
state. This is the default behavior upon invocation of the tool.
0 — A literal that specifies to treat high impedance states as a 0 state.
1 — A literal that specifies to treat high impedance states as a 1 state.
Hold (FlexTest Only) — A literal that specifies to hold the state previous
to the high impedance.
to the high impedance.
•
External state
A literal pair that specifies how the tool handles high impedance values for
external tri-state nets. The literal choices for the state option are as follows:
external tri-state nets. The literal choices for the state option are as follows:
X — A literal that specifies not to measure high impedance states; they
cannot be distinguished from a 0 or 1 state. This is the default behavior
upon invocation of the tool.
cannot be distinguished from a 0 or 1 state. This is the default behavior
upon invocation of the tool.