Hi Ahto Moorast,
If you want to check whether the MCU has the LIN function or not, you need to check the reference manual, not the datasheet.
You can check the UART chapter.
Now, just take your MK22FN1M0VALK12 as an example:


So, it has the LIN function.
If you don't want to use this chip, you also can select other chip which it meet your other demand at first, then check the MCU which you want to select, find the reference manual, open UART chapter, check whether the UART have the LIN break detect and the break transmit function or not, if yes, it has the LIN function.
Have a great day,
Kerry
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