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RM57L843: RM57L843

Geng Yue
Intellectual 535 points
Part Number: RM57L843

As we all know, the Cortex-R5 cores in RM57L843 are running in lock step mode. But I am not sure that the "register" refered in the IEC 61508 whick is showed above in the picture can be diagnosed by the lock step mode?  In another word, is there only one set of "processor feature registers" in the chip or there are two sets of "processor feature registers" for the two Cortex-R5 cores respectively??

Best Regards!

  • 0
    TI__Guru 59540 points
    Hello Geng,

    There are two complete instantiations of the Cortex-R5F cores. The TI implementation covers all inputs and outputs to the core(s) and compares them via the CCMR5. If one of the register values in a core is corrupted or has a fault, it will impact the output signals of the core and be detected as an inconsistency by the CCMR5 and, therefore, notify the system of a fault at the MCU level. If the register fault in the CPU does not impact the operation of the CPU and its output, then it would be considered a safe fault and is of little consequence.

    Please let me know if you have any additional questions or need further clarification.