Mentor v8.6_4 manual Delete LFSRs

Command Dictionary Delete LFSRs

Delete LFSRs

Tools Supported: FastScan

Scope: Setup mode

Prerequisites: You must define LFSRs with the Add LFSRs command before you can delete them.

Usage

DELete LFsrs lfsr_name... -All

Description

Removes the specified Linear Feedback Shift Registers (LFSRs).

The Delete LFSRs command deletes LFSRs defined with the Add LFSRs command. You can use the Report LFSRs command to display a list of the current LFSRs with their current values and tap positions. When you delete an LFSR, the tool also deletes all its taps and pin connections.

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

Arguments

∙lfsr_name

A repeatable string that specifies the reference names of the LFSRs which you want to remove.

∙-All

A switch that deletes all defined LFSRs.

Examples

The following example changes the definition of an LFSR by deleting it and then re-adding it with a new definition:

add lfsrs lfsr1 prpg 5 15 -serial -in add lfsrs lfsr2 prpg 5 13 -serial -in add lfsrs lfsr3 prpg 5 11 -parallel -out delete lfsrs lfsr3

add lfsrs lfsr3 prpg 5 11 -parallel -in

FastScan and FlexTest Reference Manual, V8.6_4 2-181