nRF52-DK external programming MDBT42Qhttps://devzone.nordicsemi.com/f/nordic-q-a/18564/nrf52-dk-external-programming-mdbt42qTrying to program an MDBT42Q nRF52832 based BLE module from an nRF52-DK as external target on connector P20. I used to do this with nRF51-DK and external nRF51 modules with success. Trying the same with nRF52-DK and MDBT42Q I&#39;m not having any successen-USTelligent Community 13Tue, 14 Mar 2017 17:04:28 GMTRE: nRF52-DK external programming MDBT42Qhttps://devzone.nordicsemi.com/thread/71648?ContentTypeID=1Tue, 14 Mar 2017 17:04:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5813d2af-e790-4f9b-8f7f-e305538f514cChris Gilroy<p>Was it through the mbed file you had to update the clock source? I&#39;m having this exact issue currently :(</p><div style="clear:both;"></div>RE: nRF52-DK external programming MDBT42Qhttps://devzone.nordicsemi.com/thread/71647?ContentTypeID=1Fri, 23 Dec 2016 16:33:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:62977648-072c-46d1-8cd6-c7535a384752Peter Varga<p>Good hunch. It turned out that this particular module has no LF clock source internally. You can add it externally as an option. So setting the correct LF clock source helped. Programming was successful from the get go.</p><div style="clear:both;"></div>RE: nRF52-DK external programming MDBT42Qhttps://devzone.nordicsemi.com/thread/71646?ContentTypeID=1Fri, 23 Dec 2016 11:03:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cc78ef03-5b73-4fda-a38f-64c9646bdc4eAlex<p>I&#39;m not sure how reset pin on nRF52 works during SWD operation but can it be that module came with programmed reset pin as external and you hold module in reset?</p><div style="clear:both;"></div>RE: nRF52-DK external programming MDBT42Qhttps://devzone.nordicsemi.com/thread/71645?ContentTypeID=1Fri, 23 Dec 2016 10:52:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:daacd0be-d6fe-4ae9-8767-615adcb2ca33Peter Varga<p>Hi Alex, thanks for responding. I tried that too. Same unsuccessful result for now. Peter</p><div style="clear:both;"></div>RE: nRF52-DK external programming MDBT42Qhttps://devzone.nordicsemi.com/thread/71644?ContentTypeID=1Fri, 23 Dec 2016 10:40:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6c09738e-4e36-4023-9bdc-12884272a3cfAlex<p>Try to program MDBT42Q by nRF51-DK, in case nRF52-DK has problem.</p><div style="clear:both;"></div>