Hello @JetWen,
It seemed that has something to do with the change in the MCU model.
Could you please tell which model have you had and for which one you change it?
Best regards, Raul.
Hello! RaRo,Sorry for replying so late,our currently using MCU is MKL26Z128VLH4,and we are going to replace to MKL26Z256VLH4
Hello @JetWen,
It seems that your issue has something to do with your memory configuration.
The MKL26Z256VLH4 has different memory values than the MKL26Z128VLH4, so it might be a good idea to modify your memory configuration for the new device.
[KL26P64M48SF5. Ordering Information]
[KL26P121M48SF4. Ordering Information]
Just for double check, could you please check and modified your memory configuration if needed?
Warm regards, Raul.