Mentor v8.6_4 manual Set Bist Initialization

Set Bist Initialization Command Dictionary

Set Bist Initialization

Tools Supported: FastScan

Scope: All modes

Usage

SET BIst Initialization {0 1}

Description

Specifies the scan chain input value which indicates the states of the scan cells before FastScan applies Built-In Self Test (BIST) patterns.

The Set BIST Initialization command defines the value on the scan chain inputs which, when FastScan loads the scan chains, causes the scan cells to have particular (initial) values. FastScan loads the scan chains using this input value during the simulation of BIST patterns. Then, just prior to the first BIST pattern, FastScan unloads the scan cell values (in the form of the scan chain contents) into the Multiple Input Signature Register (MISR).

Once FastScan initializes the MISR, the BIST simulation continues as normal:

1.Load a pseudo-random pattern via the scan path.

2.Generate and apply a new pseudo-random test pattern to the primary inputs.

3.Capture the response into the scan cells.

4.Load the response from the scan cells to the MISR.

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

Arguments

∙0

A literal that sets the scan chain input line to a 0, which in turn initializes the scan cells to a 0. This is the invocation default value.

2-436 FastScan and FlexTest Reference Manual, V8.6_4