Initiability: A Measure Of Sequential Testability

The testing of sequential circuit is difficult when problems occur concerning setting their initial state and checking their final state after test. The initiability measure is shown to be an efficient means for the quantification of the initialization problem of a sequential circuit. Test point insertion for sequential circuits based on the proposed modeling technique and the initiability concept is discussed. The technique for selecting the appropriate flip-flops for inclusion into partial scan is described. For all experiments, the initiability analysis is performed by the tool for sequential testability analysis (TOSTA)