Command Dictionary

Set Clock Restriction

 

 

Set Clock Restriction

Tools Supported: FastScan and FlexTest

Scope: All modes

Usage

For FastScan

SET CLock Restriction ON OFf Clock_po

For FlexTest

SET CLock Restriction ON OFf

Description

Specifies whether the ATPG can create patterns with more than one active capture clock.

The Set Clock Restriction command changes the default behavior of the ATPG regarding the creation of test patterns that have more than one active clock line. The invocation default behavior is different depending on whether you are using FastScan or FlexTest. FastScan defaults to the Clock_po behavior, while FlexTest defaults to the On behavior.

The Arguments description that follows describe the different behavior of the Set Clock Restriction command for each tool.

Arguments

ON

A literal that specifies for the ATPG to create only patterns with, at most, a single active clock.

For FastScan — The ATPG treats equivalent clocks as a single clock,

however, it treats multiple active clocks as a conflict condition and performs an exhaustive search for conditions necessary to detect the fault with no more than one active clock. Faults which the ATPG detects at primary outputs (POs) that connect to clocks must also satisfy this condition. Faults detected at clock POs that require multiple active clocks for detection, require that you use the

FastScan and FlexTest Reference Manual, V8.6_4

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Mentor v8.6_4 manual Set Clock Restriction