https://devzone.nordicsemi.com/f/nordic-q-a/56650/programming-external-nrf5340-using-nrf5340-pdkHi, I&#39;m trying to program our custom development board which has an nRF5340 on it using the external JLINK on the nRF5340 dev kit. However, during a simple read of the cpuregisters to see if we can connect, we are seeing the following error: segmentationen-USTelligent Community 13Thu, 16 Jan 2020 23:22:43 GMThttps://devzone.nordicsemi.com/thread/229498?ContentTypeID=1Thu, 16 Jan 2020 23:22:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:daf86eee-a2a0-4608-aea1-c542a3ac8dc6Andr3w<p>For anyone interested - to answer my own question it turns out our SWDIO and SWDCLK were reversed (D&#39;oh!).</p> <p>So for anyone who sees similar errors - check your wiring! :-)</p> <p></p> <p>On the bright side, it does appear that the nRF53 dev-kit will indeed program an external nRF5340.</p><div style="clear:both;"></div>