Abstract

The IEEE Std 1149.5 Module Test and Maintenance (MTM) Bus Standard is described using a high level model of system testing. Constituent elements of the Standard are examined as logical consequences of and choices based upon, this model. Functionality of the bus is outlined; and its cost of implementation, discussed. The MTM-Bus is briefly compared to IEEE Std 1149.1 with regard to the number of conformant devices necessary in order for the MTM-Bus to be usable. Standardized support of live insertion of modules is presented as an example of non-test application of the MTM-Bus. Current status of IEEE Std 1149.5 is provided.

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