I am trying to program an external board using the development kid following the instructions HERE.
I am using the debug out P20.
I have tried supplying the board frm either USB and Li-ON by switching the position of the SW9. For both cases I have verified that vdd_nrf is 1.8V.
I am connecting the usb pins at:
I set the vdd_nrf to 1,8v and i use an external supply for the external board of 1.8v.
However when flashing, it keeps going to the DK nrf5340 rather than to the external board.
Am I missing something?
The debugger is detecting the external target only if GND_detect is connected to ground. So if you connect this pin to ground, it should switch to the external board. devzone.nordicsemi.com/.../external-programming-using-nrf52-dk
Nut sure why you are connecting a USB cable to P20?