A fault tolerant cache system of automotive vision processor complying with ISO26262

With fluctuating voltage, widening operating temperature, and increasing clock frequency, cache systems are becoming increasingly susceptible to transient (soft) errors. Error correction code(ECC) is an attractive approach for transient error detection and correction[1]. However, redundant memory for error correction code has a significant impact on cost and increases the transient error rates. This paper presents a fault tolerant cache system of vision processors for automotive. The cache system has the small redundant memory and decreases the transient error rates. We proposed the mechanism which increases the error recovery rate and is considered with data cache characteristics.