https://devzone.nordicsemi.com/f/nordic-q-a/70141/dk52-external-programmingHi, I need to power my external board while debugging with the DK52. Therefore I don&#39;t use the VDD connection from the DK52, I only connect the external VDD to SH_VTG. I use Pin19, as follows: Is this correct? Because I connected it like thisen-USTelligent Community 13Wed, 03 Feb 2021 09:51:18 GMThttps://devzone.nordicsemi.com/thread/292629?ContentTypeID=1Wed, 03 Feb 2021 09:51:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ea497043-1fd3-4d74-a42c-9052e2f135e4Marjeris Romero<p>Hi,<br /><br />I cannot guarantee that it will work and that you will not destroy another DK unless you follow the recommended operation conditions, which are listed in this page: <a href="https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/hw_debug_out.html">https://infocenter.nordicsemi.com/topic/ug_nrf52832_dk/UG/nrf52_DK/hw_debug_out.html</a> <br /><br />You should have common GND between the DK and the external board, and the voltage of the external board should match the programming voltage supported by the DK (3.0 V).</p> <p>There are others programmers available in the market that supports other target voltages: <a href="https://www.segger.com/products/debug-probes/j-link/models/model-overview/">https://www.segger.com/products/debug-probes/j-link/models/model-overview/</a> <br /><br />BR,</p> <p>Marjeris</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/291189?ContentTypeID=1Tue, 26 Jan 2021 08:34:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c4d24c51-cdd9-42e9-82f0-ce9516b05aa0Gueston<p>The reason is that this external board is supplied with 7.4V and has an LDO which supplies 2.5V for the nRF chip. Only reason for connecting the 7.4V is because I can debug the whole board in this way, if I supply it with the nRF52DK then only parts of the circuit work.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/290677?ContentTypeID=1Fri, 22 Jan 2021 09:26:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a39d1c0e-82f5-4e25-9671-89a5b4808900Marjeris Romero<p>Is there a reason why you are not supplying you external board from the nRF52DK? The voltage supported by the external debugging/programming is 3.0V.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/290035?ContentTypeID=1Tue, 19 Jan 2021 14:32:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6428f10e-dee6-42e8-8874-19eca3588139Gueston<p>Yes, I don&#39;t use the VDD from DK52. The voltage of the external board is 2.5V, so lower then the DK52. Is it possible to supply the DK52 from the external board by not switching the DK52 on, and still make use of the USB for debug purposes?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/289959?ContentTypeID=1Tue, 19 Jan 2021 09:52:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f27108ce-10d7-4391-9e0f-86388925f35cMarjeris Romero<p>Hi,</p> <p>Sorry for the late reply. The voltage on the external board must match that of the development kit (DK). You write that you don&#39;t use the VDD connection from the DK52, so it&#39;s not given that VDD on the nRF52DK match your external VDD and most likely therefore you are seing problems.</p> <p>BR,</p> <p>Marjeris</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/288836?ContentTypeID=1Wed, 13 Jan 2021 08:46:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:895fb1c0-7049-4aa5-b491-a61d1c9a7b96Gueston<p>Hi, any updates on this?</p><div style="clear:both;"></div>