S32k144 in VLPR mode, UART send is not a problem, but data receive will scramble, or even abnormal reset.
I would like to ask you a few questions.
Do you have SIRC as a clock source for the LPUART module?
According to RM rev 9., chapter "38.8 Module operation in available power modes" the LPUART has full functionality in VLPR mode.
How do you set the baud rate? Could you check LPUART status register (STAT)?
Or could you share your code I can try to test it and check your setting of registers?
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