Howto recover a nRF52840 Development Kit?

[good_night]

My program loaded to a nRF52840 DK unfortunately adresses ports P1.15 and P1.13.

Now the DK is not reachable for Segger IDE and can not be found as a USB device.

I can reach the boot mode, but how to erase or change the program on the target?

[Dmitry]

good_night said:

Now the DK is not reachable for Segger IDE and can not be found as a USB device. I can reach the boot mode, but how to erase or change the program on the target?

Did you enter interface MCU into boot mode (by pressing IF BOOT/RESET button)?  Look here if it's your case. P1.15 and P1.13 shouldn't cause any problems with DK.

[good_night]

Thank you Dmitry,

I did like proposed in the linked article - everything is fine again now.