Single Point Fault Detection Measures

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

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2.4 English

ECC protection for OCM, PMU-RAM, CSU-RAM, and RPU L1 cache and TCM memories

°Address decode error detection

°Separate RAMs for ECC syndrome and data

°4:1 or greater interleaving of memory cells protected by ECC

Hash validation of CSU BootROM contents at every boot

Lockstep and redundancy covers R5F

°R5F lockstep with physical and temporal diversity

°Redundant logic in critical control logic such as R5F lockstep checkers

PMU and CSU implemented with redundancy

°TMR (triple module redundant) processor cores with physical diversity

°Triple redundant flip-flops for critical control bits such as security state

XMPU and XPPU protect memory space

Watch-dog timers

°Watchdog timers provided in LPD and FPD

°LPD watchdog timers for RPU and PMU