https://devzone.nordicsemi.com/f/nordic-q-a/105489/where-to-find-nrf9160dk-hardware-files-schematics-layoutsHello. I would like to learn more about nRF cellular module and how it works. I was a little bit confused when I first received the development kit and noticed that there is weird microcontroller on the development board (MK22FN128VL110). Afteren-USTelligent Community 13Wed, 08 Nov 2023 09:10:33 GMThttps://devzone.nordicsemi.com/thread/454610?ContentTypeID=1Wed, 08 Nov 2023 09:10:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7c5602ec-2817-4f69-89c2-39d06d1e3464zazas321<p>Thank you! I somehow missed that completely</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/454593?ContentTypeID=1Wed, 08 Nov 2023 08:34:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7ee81728-489f-422e-92ce-8c2f9c7f2d71Karl Ylvisaker<p>Hello,</p> [quote user=""]I could not find any information about this. I was under the impression that this board only houses nRF91 + nRF52840. Can someone help me understand what is the purpose of having additional MCU on the board?[/quote] <p>The purpose of this microcontroller is to work as the interface MCU, i.e debugger on the board which handles the programming of the nRF52840 and nRF9160.<br /><br />You can find the hardware files in <a href="https://www.nordicsemi.com/Products/Development-hardware/nRF9160-DK/Download?lang=en#infotabs">the <em>downloads</em> section of the Product page</a>&nbsp;when you scroll all the way to the bottom.<br /><br />Best regards,<br />Karl</p><div style="clear:both;"></div>