Hello @CAFU ,
Thanks for your post.
I wasn't able to find any information about the kl26p100 board on the official website. Maybe it's a custom board.
For mkl26z256vll4 mcu, you can use our FRDM-KL26Z, it has the SDK and many resourses and documentation.
FRDM-KL26Z|Freedom Development Platform|Kinetis® MCU | NXP Semiconductors
The SDK for the mkl26z256vll4 processor is also provided, and you can use it as well.

Hope it can help you.
BRs,
Celeste
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