RE: How to do firmware update on nRF52840 through usb (not the usb with J-link)?

Amanda Hsieh — Wed, 18 Dec 2019 11:57:57 GMT

Hi,

[quote user=""]I want to double check if this entire project is for programming the nordic chip through the usb port on the long side (not the one on the short side with J-link) on nFR52840 DK.[/quote]

No, you need to USB connector J2 for the interface MCU.

[quote user=""]Do I need to build and run this project onto the DK through J-link first? [/quote]

Yes.

[quote user=""]Does that mean I need to connect a second usb cable from pc to DK usb long side?[/quote]

If you don't debug, you can move the USB cable to J3 after loading the DFU bootloader image. Then, you will see SDFU USB under the Ports in the Device Manager window.

-Amanda H.