T. Michel, R. Leveugle, G. Saucier, R. Doucet, P. Chapier
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Taking advantage of ASICs to improve dependability with very low overheads /spl lsqb/PLC/spl rsqb/
On-line test mechanisms have been designed for the CPU of a programmable logic controller. Specific devices integrated in an ASIC processor perform control flow checking during both application and system program executions. A prototype has been implemented, demonstrating the very low overhead of the approach. Results of fault injections have then proved the dependability increase at system level.<>
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