Hello @MelonM ,
Thanks for your post. The FRDM-KL25Z board is designed with pinouts following the Arduino UNO R3 shield standard. You can find the Arduino reference design online to obtain the relevant data.
Alternatively, you can also download the FRDM KL25Z Design Files(FRDM-KL25Z|Freedom Development Platform|Kinetis® MCU | NXP Semiconductors), and open the following files to obtain the data.


Hope it can help you.
BRs,
Celeste
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