[nRF52840 DK] How can i use nRF only mode?

[Sangbin]

Hi. 

I'm using nRF52840 Developement Kit and my environment are below.

OS : windows 10

SDK version : 16.0.0

Tool : nRF Connect (with DTM,Programmer app) / Seger embedded studio for ARM 4.52a

i can control nRF52840 DK using nrf connect and segger embedded studio.

but i can't control nRF52840 using nRF only mode. ( the yellow part of the picture below)

I want to control the nRF52840 alone without using MCU(cortex M4) by using usb connector(J4) and nrf only mode switch in the yellow part of picture.

please can help how can i use yellow part alone ? 

Best regards.

[Stian Røed Hafskjold]

Hi, I'm not sure what you mean with nRF52840 alone. The MCU is the nRF52840. The Cortex M4 CPU is inside the nRF52840 and is controlling the radio, etc. The part of the DK which is not yellow in your picture is the debugger. If you don't want to use the onboard debugger, you will have to connect an external debugger to the debug in port.