ScTMR: A Scan Chain-Based Error Recovery Technique for TMR Systems in Safety-Critical Applications

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Provided by: edaa
Topic: Hardware
Format: PDF
The authors propose a roll-forward error recovery technique based on multiple scan chains for TMR systems, called Scan chained TMR (ScTMR). ScTMR reuses the scan chain flip-flops employed for testability purposes to restore the correct state of a TMR system in the presence of transient or permanent errors. In the proposed ScTMR technique, they present a voter circuitry to locate the faulty module and a controller circuitry to restore the system to the fault-free state. As a case study, they have implemented the proposed ScTMR technique on an embedded processor, suited for safety-critical applications.
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