S32K344 reset reason

[YL005]

Hi,

I am trying to get the reset reason of s32k344 on the s32k344evb by using Mcu_GetResetReason.

When I use MCU_PerformReset to reset the controller with functional reset, I'd expect to see the return value be a category that is functionally reset. But the value returned was power on reset.

What is the problem? Could this problem be related to FS26?

[Robin_Shen]

Hi

1st. Could you please check the state of PRTN1_COFB1_CLKEN. BLOCK53(FXOSC) and PRTN1_COFB1_CLKEN. BLOCK56(PLL) before calling Mcu_PerformReset()?

2nd. Did you configure PLL CLK or not? These two bits may impact the reset reason after the functional reset is triggered when either of the two bits are disabled and PLL is enabled.

Best Regards,
Robin
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[YL005]

Hi

Do you mean PRTN1_COFB1_CLKEN. REQ53(FXOSC) and PRTN1_COFB1_CLKEN. REQ56(PLL)?

The status of PRTN1_COFB1_CLKEN. REQ53(FXOSC) and PRTN1_COFB1_CLKEN. REQ56(PLL) is as below

And the PLL is configured as below

[Robin_Shen · Accepted solution]

Please enable PRTN1_COFB1_CLKEN. REQ56(PLL) 

[YL005]

Hi Robin,

I turned on the PRTN1_COFB1_CLKEN. REQ56(PLL) bit then the reset reason return MCU_SW_FUNC_RESET as expect.

The solution is really helpful, thanks a lot.

Could you please let me know how this bit relates to the reset reason?