2396817_en-US

FS26 LDO Off Issue

Hello

I am using the FS26 and S32K358.

I am using the FS26's VLDO2 as the power supply for the MCU and the FS26's VLDO1 as the power supply for the CAN transceiver.

When the MCU is left in a state of CAN communication, the FS26's VLDO turns OFF, cutting off the MCU's power.

(This occurs randomly, approximately every 1 to 8 hours.)

The VLDO is restored only after the FS26's power supply is cut off and then restored.

This issue occurs on all boards, not just a single one, and does not occur when CAN communication is not in progress.

The status when the issue occurs is as follows:

Vpre 6V O

VDIG 1.6V O

VBOS 5V O

VLDO2 X

VLDO1 X

VCORE X

DFS is disabled via OTP.

I would like to know the current state of the FS26 and what causes this to happen.

Re: FS26 LDO Off Issue

Hello kjy106906

Good day!

Is the watchdog enabled?

What are the values of:

Have you checked if FS26 is not displaying any UV or OV flags?

Also could you share your M_STATUS?

I hope this information has helped you, please let me know if you need help with anything else.

Have a great day and best of luck.