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S32K14x SM_043 - Error Monitoring

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S32K14x SM_043 - Error Monitoring

a month ago
114 Views
jaijithshirnali
Contributor I

Hi NXP team,

The below assumption on NXPS32K14x is mentioned under HW requirements and requires system to monitor the error flags.

Assumption: [SM_043] The overall system needs to include measures to monitor error
flags in registers of the MCU and move the system to a Safe statesystem when an error is
indicated. [end]

Question - How is it possible to check the error flags in the registers of MCU from an external source? Is it sufficient that register monitoring is implemented in SW within the MCU and we enter safe state from SW?  If not, can you provide some implementation hints?

 

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2 weeks ago
37 Views
Yashwant_Singh
NXP Employee
NXP Employee

Hello,

Apologies for the delay.

This assumption is more about indicating MCU state to the external system upon critical failures. The application software is expected to monitor error flags such as those in the status registers of RCM and CGM for reset and clock related faults. The faulty state should be signaled to the external system via GPIOs for example. The external system monitoring these GPIOs must switch to a safe state and also safe sate the MCU if the application software running on MCU fails to do so whenever a faulty state of the MCU is indicated.

Thanks!
-Yashwant

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