FastScan and FlexTest Reference Manual, V8.6_4
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Set Gate Report Command Dictionary
•Constrain_value
A literal that specifies for the Report Gates command to display the simulated
values that result from all natural tied gates, learned constant value non-scan
cells, constrained pins, and constrained cells.
The Report Gates command displays three values which are separated by a
slash (/). These values are the gate constrained value (0, 1, X, or Z), the gate
forbidden values (-, 0, 1, Z, or any combination of 01Z), and the fault blockage
status (- or B, where B indicates all fault effects of this gate are blocked).
•Seq_depth_data (FastScan Only)
A literal that specifies for the Report Gates command to display the calculated
gate sequential depths.
When you select a non-zero sequential depth, the tool performs a learning
process to identify the minimum depths necessary to satisfy controllability and
observability requirements for all gates using the current clock_sequential
cells. The tool calculates both the 0-state and 1-sate controllability depths. At
the end of the analysis, the tool displays a summary message indicating the
largest sequential test depth, along with the largest control and observe depth.
The test generator uses the sequential depth information in making decisions
and avoiding paths whose sequential depth exceeds the maximum allowed
sequential depth.
The Report Gates command includes three values separated by a comma and a
dash. The first value is the 0-state controllability depth, the second value is the
1-state controllability depth, and the third value is the observability depth. The
maximum reported depth is 255. If controllability or observability is logically
impossible or exceeds 255, the report displays an asterisk (*) in the
corresponding fields.
•Clock_cone pin_name
A literal and string pair that specifies the clock pin for which the Report Gates
command displays the clock cone data.
The clock cone data from the Report Gates command is the same data that is
available as error data for clock rules violations. You can only use this option
after flattening the simulation model.
The pin_name must be a valid clock pin or an error condition occurs. The tool
considers the pin equivalents when calculating the clock cones. State elements