How to write programs to custom boards via USBhttps://devzone.nordicsemi.com/f/nordic-q-a/89372/how-to-write-programs-to-custom-boards-via-usbHello, I am a private developer of wireless gaming mice in Japan. I am thinking of using Nordic&#39;s nRF52840 as the MCU, but can this chip be written to only by USB without using an external debugger (such as Jlink) in its factory default state? If youen-USTelligent Community 13Thu, 05 Jan 2023 13:50:34 GMTRE: How to write programs to custom boards via USBhttps://devzone.nordicsemi.com/thread/403418?ContentTypeID=1Thu, 05 Jan 2023 13:50:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8c3180d0-c3f6-4525-a5a5-1b042c4bdee3noob_123<p>Hi,</p> <p>Unable to open this&nbsp;</p> [quote userid="77059" url="~/f/nordic-q-a/89372/how-to-write-programs-to-custom-boards-via-usb/374323"]291328[/quote] <p>Can you repost this link?</p><div style="clear:both;"></div>RE: How to write programs to custom boards via USBhttps://devzone.nordicsemi.com/thread/374323?ContentTypeID=1Mon, 27 Jun 2022 10:57:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e6278c51-80fb-46d0-93f0-092e4f5b5505Kaja<p><strong><span>Duplicate, closing this case, see&nbsp;</span><a href="https://devzone.nordicsemi.com/support-private/support/291328">291328</a></strong></p><div style="clear:both;"></div>