Add Cell Constraints

Command Dictionary

 

 

An error condition occurs if the pin pathname does not resolve to a scan memory element. Buffers and inverters may reside between the pin and the memory element.

chain_name cell_position

A string pair that specifies the name of the scan chain and the position of the cell in the scan chain. The scan chain must be a currently-defined scan chain and the position must be an integer where 0 is the scan cell closest to the scan- out pin. You can determine the position of a cell within a scan chain by using the Report Scan Cells command.

The MASTER memory element of the specified scan cell is set to the value that you specify; there is no inversion. However, the tool may invert the output pin of the scan cell if there is anything between it and the MASTER memory element if inversion exists between the MASTER and the scan output pin of the scan cell only.

C0

A literal that constrains the scan cell to load value 0 only.

C1

A literal that constrains the scan cell to load value 1 only.

CX

A literal that specifies to simulate the loaded scan cell value as unknown (uncontrollable).

Ox

A literal that specifies to simulate the unloaded scan cell value as unknown (unobservable).

Xx

A literal that constrains the scan cell to be both uncontrollable and unobservable (CX and Ox).

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FastScan and FlexTest Reference Manual, V8.6_4

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Mentor v8.6_4 manual ∙ chainname cellposition, ∙ C0, ∙ C1, ∙ Cx, ∙ Ox