Set Nonscan Model

Command Dictionary

 

 

Arguments

DRC

A literal that specifies for FlexTest to allow the Design Rules Checker to classify each non-scan cell based on the criteria listed in Table 2-9.

Table 2-9. DRC Non-scan Cell Classifications

Classification

Criteria

 

 

HOLD

The state value of the non-scan cell is unknown (X), but

 

it remains the same as immediately before a scan

 

operation.

 

 

INITX

Behaves the same as the HOLD gate, but its state can

 

change values during a scan operation.

 

 

INIT0

The state of the non-scan cell remains low (0)

 

immediately after a scan operation.

 

 

TIE0

Behaves the same as the INIT0 gate, but also remains at

 

a low state during all non-scan operations.

 

 

INIT1

The state of the non-scan cell remains high (1)

 

immediately after a scan operation.

 

 

TIE1

Behaves the same as the INIT1 gate, but also remains at

 

a low state during all non-scan operations.

 

 

This is the default upon invocation of FlexTest.

HOLD

A literal that specifies for FlexTest to classify as HOLD those non-scan cells that have the criteria to be INITX. This increases the test coverage.

INITX

A literal that specifies for FlexTest to classify as INITX those non-scan cells that have the criteria to be HOLD. This increases pattern compactability.

2-534

FastScan and FlexTest Reference Manual, V8.6_4

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Mentor v8.6_4 manual ∙ Drc, Classification Criteria