https://devzone.nordicsemi.com/f/nordic-q-a/38434/nrf52840-and-usb-circuit-boardHello Support team, I&#39;m working on a project where I am designing a custom board uisng the Nordic NRF52840 as the MCU (forgive me if I&#39;m using the incorrect terminology or decripition for things as I am new to all this). Essentially, I want to be ableen-USTelligent Community 13Wed, 12 Sep 2018 10:35:06 GMThttps://devzone.nordicsemi.com/thread/148372?ContentTypeID=1Wed, 12 Sep 2018 10:35:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dda760ab-72de-4c80-a4ec-fd0bbd853809Einar Thorsrud<p>That is correct. the nRF52840 ships with an empty flash, so you need to program&nbsp;it via SWD initially. If you program it with a USB bootloader, then you can subsequently use USB for later programming. The <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.2.0/ble_sdk_app_open_bootloader.html?cp=4_0_0_4_3_2">Open bootloader example</a> in the SDK can be used for this.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/148279?ContentTypeID=1Tue, 11 Sep 2018 17:33:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7c358c43-49d4-4f93-8d7d-707e3c476d75David Fogelsong<p>The good news for you is that the nRF52840 has usb built into the actual chip itself.&nbsp; &nbsp; However, I&nbsp;suspect (?) it doesn&#39;t work automatically, without initialization,&nbsp;like&nbsp;an FT232RL would.</p><div style="clear:both;"></div>