Hi jun yamada,
Would you please let us know if you want to use 5V power supply KE06 or just want to use external debugger?
(1) Cut the resistor R58 on the FRDM board
Notice it is for: use OpenSDA(J7) connect to an off-board MCU.
But if you want to use external debugger instead of use OpenSDA, then just connect external debugger on J7.
Cut the resistor R58 will disconnect external debugger(J7) with on board KE06. I don't think it is what you want.

Once you insert USB connector(J6), the P5V_SDA will power P3V3_SDA through U2(if R26 is not removed). The P3V3_SDA is the power of OpenSDA(U5).


Best Regards,
Robin
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