Case study: BISR for a processor multiplier

The case study deals with an implementation of a built-in self-repair architecture into LEON3 processor environment. New reconfigurable logic block architecture (self-repair wrapper) of the LEON3 multiplier is designed providing self-repair ability; moreover reliability parameters (R and the mean time to failure) of the multiplier are improved as well. The test algorithm necessarily required in the self-repair procedure is also proposed. Estimations of the area overhead required for BISR, multiplier reliability parameters and fault coverage of the test algorithm are presented at the end of the paper.