Applications of the IEEE P1149.5 module test and maintenance bus

Abstract

The proposed IEEE P1149.5 Module Test and Maintenance (MTM) Bus standardizes a serial backplane bus for use in test, diagnosis, and maintenance of electronic subsystems and modules. This paper describes features, capabilities, applications, and current status of the proposed standard; and discusses how P1149.5 can efficiently support low cost testable system designs. Two brief case studies illustrate P1149.5 applications: first as a simple system level gateway to chip level test buses, and second as the core test and maintenance interface for complex, highly reliable systems.