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Superimposed In-Circuit Fault Mitigation for Dynamically Reconfigurable FPGAs

Reassuring fault tolerance in computing systems is the most important problem for mission critical space components. With the rise in interest of commercial SRAM-based FPGAs, it is crucial to provide runtime reconfigurable recovery from a failure. In this paper we propose a superimposed virtual coarse-grained reconfigurable architecture, embedded an on-demand three level fault-mitigation technique tailored for FPGA overlays. The proposed method performs run-time recovery via Microscrubbing. This approach can achieve up to 3× faster runtime recovery with 10.2× less resources in FPGA devices, by providing integrated layers of fault mitigation.