| Summary: | Asynchronous FIFO, a basic structure in digital system, is widely used in digital design. The reliability of asynchronous FIFO can affect the entire system. This paper presents a foldable fault-tolerance approach to improve the reliability of asynchronous FIFO. Asynchronous FIFO can tolerate more failures with this method. In addition, in order to reduce the impact of faults on the depth of the FIFO, spatial redundancy is introduced on the basis of the folding method. Compared with the solution that uses only spatial redundancy, the proposed approach can tolerate 12 more failures, while the area overhead for fault tolerance only increases by 4.19% at most.
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