https://devzone.nordicsemi.com/f/nordic-q-a/68891/programming-custom-nrf5340-board-with-nrf52833-development-kitI have downloaded and installed nRF Connect v3.6.0. I&#39;d like to program a custom nRF5340 board, which I have connected to the nRF52833 dev-kit. When I go into Segger IDE and press Target + Connect J-link I get the following error message: &quot;J-Linken-USTelligent Community 13Wed, 02 Dec 2020 20:05:51 GMThttps://devzone.nordicsemi.com/thread/282944?ContentTypeID=1Wed, 02 Dec 2020 20:05:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:af4a6e6a-9143-4870-89ba-7cdaa74d497bKnut<p>Hi Charlie,</p> <p>I did&nbsp;get hold of an nRF5340 PDK and connected it to my own nRF5340 board. I was able to program the &quot;Peripheral Heart Rate hex files using the nRF Connect v3.6.0 Programmer!</p> <p>Thanks a lot for your help!</p> <p>Knut</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/282398?ContentTypeID=1Mon, 30 Nov 2020 09:12:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:462a8390-7e44-49c0-95c5-8433c379e610Charlie<p>Hi Knut,</p> <p>The J-link-OB hardware on nRF52 series DKs doesn&#39;t support cortex-M33 based devices. You need either nRF5340PDK/nRF9160DK, or a J-Link with the <a href="https://wiki.segger.com/Software_and_Hardware_Features_Overview">hardware version above V9</a>.</p><div style="clear:both;"></div>