https://devzone.nordicsemi.com/f/nordic-q-a/93909/nrf52840-not-detected-by-j-linkHi, I&#39;m trying to implement a circuit using a brand new nRF52840 chip. The chip has no bootloader included yet. When I try to burn bootloader, the chip is not detected by JLink nor USB. All the examples I have found were based on DK board and I needen-USTelligent Community 13Thu, 17 Nov 2022 05:59:24 GMThttps://devzone.nordicsemi.com/thread/396117?ContentTypeID=1Thu, 17 Nov 2022 05:59:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:834eeac9-6fd8-4579-84b2-ddd69abacdfbThilinaShehan<p>Thank you very much for the support. Problem solved when try on a different computer.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/395866?ContentTypeID=1Tue, 15 Nov 2022 18:48:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:100ecd3b-ba78-41b7-a0c2-a3324edbcca0JONATHAN LL<p>Hi,<br /><br />Are you using a dedicated J-Link debugger\programmer?<br /><br />How is the custom board power?&nbsp;<br /><br />What is the voltage you measure at VDD_nRF?<br /><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1668537871953v1.png" alt=" " /><br /><br /><br /><br /><br />All you should need is VDD, GND, SWDIO and SWDCLK to be able to program the new IC.<br /><br /><br />I can review the schematic and HW layout if you want. It is something we do so you can share the files here. If you don&#39;t want it to be public then you can create a new private ticket and name it nRF52840 review.&nbsp;&nbsp;<br /><br />Regards,<br />Jonathan</p><div style="clear:both;"></div>