Firmware for NRF52 DK debugger MCU.

[abdosalm]

I was developing my development kit with onboard sensors and other ICs. So, I was looking into NRF52 DK schematics and documentation. the problem is that the interface/debugger MCU is NRF5340 as shown in the schematics but on the website page, nordic only shows the firmware file name for the SAM3U128 interface MCU from the microchip which was the debugger MCU for an older version of this board. My question is that I don't know whether this file can be flashed into the NRF5340  and if it is feasible to make my own development kit with an onboard debugger using the Sgger J-link firmware. 

[SwRa]

Hello,

My question is that I don't know whether this file can be flashed into the NRF5340 

This cannot be flashed onto the nRF5340 interface mcu. The JLink firmware for the nRF5340 as interface mcu is not made available to the public.  It also has a first-stage bootloader inside that IC which is also not available and if tampered, it can brick the device.

it is feasible to make my own development kit with an onboard debugger using the Sgger J-link firmware. 

You can make your own custom board using any debugger of your choice, you could also use the Debug Out port of any of the DK's.. You could refer the hardware files  for the nRF52-DK..

 

Regards,

Swathy