S32K312 HSE_SWT_RST issue

[Yiming2]

hello all

we just found that when the MCU is power up, it would be continuously reset 6 times at the beginning, after 6 times it would be going into normal status,HSE seems work correctly after continuous 6 times . and we also read the reason of reset, it showed that HSE_SWT_RST. We don't know why it would reset 6 times.  Note : We did install the HSE-firmware for random number generation. The MCU we are using is S32K312. but we also check the HSE_CLK=60MHz and Core_CLK=120MHz AIPS_SLOW_CLK=30. And also checked the DCF config the CLK option is "00". We don't know why HSE_SWT is triggered 6 times. How to fix this issue.

[lukaszadrapa]

Hi @Yiming2 
I saw in the past that HSE SW RST could be triggered on S32K312 if the clocks are not configured appropriately. But it seems to be OK according to your description. Could you try to configure the clocks after the HSE_STATUS_INIT_OK bit gets set in the FSR of any of the MU? Does it make a difference?
Regards,
Lukas