Abstract
In this work we propose a method to evaluate the criticality of the components of a circuit with respect to Single Event Transient (SET) effects. Emulation-based fault injection is used to determine the error rate for each individual gate. The method also identifies the optimal set of flip-flops to be hardened using time redundancy techniques. The results enable the selective application of SET mitigation techniques to satisfy soft error rate requirements with reduced overheads. A PIC18 microprocessor with three different workloads has been used as a case study, and results show that just hardening 25% of gates is enough to achieve more than 99% mitigation of SET effects.
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