一种提高反熔丝FPGA容错能力的新方法
A Novel Fault Tolerance Approach for Antifuse FPGAs
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摘要: 针对反熔丝FPGA中反熔丝单元的开路故障,提出了一种提高反熔丝FPGA容错能力的新方法.该方法通过对VPR布线算法的改进,在FPGA布线时预留更多的对称布线资源以便在故障发生时用于容错处理.实验结果表明,当FPGA布线资源固定时,该方法在布线阶段有效增加了对称线段的预留量,预留量平均可增加30.4%,最高可达100%;当预留量达到100%时,FPGA的单个反熔丝故障都可以通过容错消除该故障.Abstract: 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%.
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