Using the Value Change Link (VCL)

Using the Value Change Link (VCL)

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Using the Value Change Link (VCL)

Overview

The procedures described in this application note are deliberately broad and generic. Requirements for your specific design may dictate procedures slightly different from those described here.

Purpose

This application note shows you how to use the Veritool™ PLI and Value Change Link (VCL) facilities to create a toggle tester. The following topics are covered:

■Uses of the VCL

■Design of a VCL application

■Toggle test application

■Operations required of a VCL application

The code for the toggle test application can be found on all Verilog-XL release tapes in the following subdirectories:

■/tools/verilog/examples/PLI/toggle_count

■/tools/verilog/examples/PLI/toggle_test

Audience

This application note is for designers who want to use the PLI and VCL facilities to create a toggle test application, the results of which provide an upper bound on fault detection/fault coverage for a particular set of vectors.