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Questions about the USB power of the nRF52840 DK board.

Hi.

I am using the nRF52840 DK board and have integrated the SDK15 ESB_Rx example with the HID example.

The nRF52840 DK board has two USB ports. (J2, J3)

  • J2: Firmware Programming
  • J3: HID

Is it necessary to connect USB to both J2 and J3 to use HID?

Until yesterday, I did not connect USB to J2, I only connected USB to J3, and HID worked well.

J2, J3 Both HID works well when J2 is removed after USB connection.

If J2 is not connected and only J3 is connected, HID will not work.

Is this normal?

Thank you.

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