https://devzone.nordicsemi.com/f/nordic-q-a/29275/nrf52840---changes-of-reference-designI&#39;m currently working with an own hardware with a nRF52840. We had some time to get the radio working, because we copied the schematic of the PDK. In the reference design of the nRF52840 PDK, the connection between DEC4 and DEC6 (prev. DEC2) was missingen-USTelligent Community 13Wed, 10 Jan 2018 14:43:28 GMThttps://devzone.nordicsemi.com/thread/116436?ContentTypeID=1Wed, 10 Jan 2018 14:43:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:01956b18-36d1-462c-b948-25b1a6729f45Fabian Frei<p>Thanks for your answer. I referred to 1. (the external connection of the decoupling pin DEC6). I just found the site with the reference design for the specifications 0.5.1 <a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52%2Fdita%2Fnrf52%2Fpdflinks%2Fref_layout.html">here</a>. I wrongly used the Preview Dev Kit design as reference before.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/116435?ContentTypeID=1Wed, 10 Jan 2018 13:51:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:31dfc809-0bb9-4024-adef-146145f469fdMartinBL<p>I&#39;m not sure what details you are referring to in your link, but there are two changes:</p> <ol> <li>The one explained here: <a href="https://devzone.nordicsemi.com/question/186260/nrf52840-q1aabb-ble-advertising-problem/">nrf52840 QIAABB ble advertising problem</a>.</li> <li>If you are using the DCDC converter in <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52840.ps/power.html?cp=2_0_0_15_0_3#unique_1484593393">Regulator 0</a> there is an additional <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52840.ps/ref_circuitry.html?cp=2_0_0_55_3#unique_2033570082">47nF capacitor in parallel with C15</a>.</li> </ol><div style="clear:both;"></div>