A Novel Fault Tolerance Approach for Antifuse FPGAs

A novel fault tolerance approach for the antifuse FPGA was proposed to deal with the stuck-open fault of the antifuse. By modifying the routing algorithm of VPR to reserve more symmetrical routing resources, the purpose of improving fault tolerance ability of the antifuse FPGA was achieved. The experimental results showed that when the routing resources in the FPGA are fixed, the percentage of the reserved symmetrical routing resource could be increased by 30.4% on average while for some instances the percentage can reach 100%. Our method can bypass any single faulty antifuse in the FPGA when the percentage of reserved resource is 100%.