Single test-point signature diagnosis of microprocessor systems

Signature analysis is a well established technique in digital system maintenance. The paper illustrates how a signature analyser can be employed for functional testing of microprocessor systems in a production environment, by suitably organizing the test procedure. The proposed functional test method features easy set-up, effective diagnostic capabilities on faulty systems, and reduced requirements for test documentation. Examples taken from a real life case are discussed to point out peculiar aspects of the method.