Add Observe Points

Command Dictionary

 

 

Add Observe Points

Tools Supported: FastScan

Scope: Atpg, Fault, and Good modes

Usage

ADD OBserve Points pin_pathname...

Description

Adds observe points to output pins.

The Add Observe Points command adds observe points to the output pins of cells, providing a way to evaluate the effect of making the cell output pin an observable point. After you issue this command, the tool discards all of the patterns in the current scan test pattern set. After insertion, the tool discards the current fault list, so you must recreate the fault list if you wish to perform additional fault simulation. If you enter Setup mode, the tool deletes any observe points you added. Moreover, you cannot generate test patterns after adding observe points.

You use this command primarily for simulating Built-In Self Test (BIST) circuitry.

Arguments

pin_pathname

A required repeatable string that specifies a list of output pins for which you want to insert observe points.

Examples

The following example adds an observe point to an output pin to evaluate the effects of its value:

set system mode atpg

add observe points i_1006/o analyze control

report control data

2-90

FastScan and FlexTest Reference Manual, V8.6_4

Page 118
Image 118
Mentor v8.6_4 manual Add Observe Points, Adds observe points to output pins