A Module-Level Testing Approach for Combinational Networks

A module-level testing approach for combinational networks which employs hardware modification and a simplified test generation procedure is described. The approach is based on a directed graph model for the network derived at the module level. The objectives of the approach are to deal with testing directly at the module level, to use cataloged tests for the modules in the network environment, and to generate a fault detection test set with "good" fault location capability. Networks which consist of single-output modules are treated initially and then the results are extended to networks which consist of multiple-output modules. Hardware modification and test generation procedures are illustrated.