Test Point Insertion and Scan Chain Reordering for Broadcast-Scan Based Compression

摘要

A method for increasing fault coverage and compression with a broadcast scan-based test data compression circuit includes inserting test points for breaking correlations existing between scan inputs that belong to same scan slices making some faults un-testable with a broadcast scan-based test data compression circuit; and reordering scan inputs for further reducing correlations between scan inputs that belong to the same scan slices.