Abstract
SRAM-based field programmable gate arrays (FPGAs) have an inherent capacity for defect tolerance. A simple scheme that exploits this potential in multiple-FPGA systems is proposed. The symmetry of the system is exploited to yield a large number of possible mappings of bitstreams on FPGAs, which results in a high probability that at least one functional mapping exists. It is shown that the behaviour of a system built using a large number of defective FPGAs approaches that of the ideal defect-free system. Various interconnection topologies such as the tree, the crossbar and a hybrid form are compared.
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