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A Fault-Tolerant Cache System of Automotive Vision Processor Complying With ISO26262
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- Authors
- Jinho Han, Youngsu Kwon, Kyeongjin Byun, Hoi-Jun Yoo
- Issue Date
- 2016-12
- Citation
- IEEE Transactions on Circuits and Systems II : Express Briefs, v.63, no.12, pp.1146-1150
- ISSN
- 1549-7747
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- With fluctuating voltage, widening operating temperature, and increasing clock frequency, cache systems are becoming increasingly susceptible to transient errors. Error correction code (ECC) is an attractive approach for transient error detection and correction. However, redundant memory for ECC has a significant impact on cost and increases the transient error rates. This brief presents a fault-tolerant cache system of automotive vision processors. The cache system has the small redundant memory and decreases the transient error rates with the proposed mechanism, which increases the error recovery rate and is considered with data cache characteristics. Also, the cache system is analyzed complying with ISO26262. As a result, thanks to 80% reduction of error traps caused by the cache system at the automotive vision processor's variable fault-tolerant policy, compared to the cache system of the state-of-art vision processors for automotive.
- KSP Keywords
- Automotive Vision, Clock frequency, Error Correction Code(ECC), Error Detection and Correction, Error Recovery, Fault tolerant, Operating Temperature, State-of-art, Vision processor, data cache, error rate