https://devzone.nordicsemi.com/f/nordic-q-a/39331/nrf52840-initial-bootloaderHi, We are currently develop our costum board with an nRF52840 SoC. Are the nRF52840 shipped with an initial bootloader to programm the device via USB? Because if possible would like to prevent to use programming interface via SWDL and SWCKL. Is thereen-USTelligent Community 13Wed, 10 Oct 2018 12:54:21 GMThttps://devzone.nordicsemi.com/thread/152365?ContentTypeID=1Wed, 10 Oct 2018 12:54:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:076d7f33-1c04-4783-a2d3-856dd2a6ece2AndreasF<p>Hi Michel.<br /><br />The nRF52840 SoC doesn&#39;t have a built-in USB bootloader.<br />The nRF52840 Dongle has a built-in USB bootloader.<br /><br />To program the nRF52840 SoC you should take a look at the <strong><a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/development/nrf52840_pdk/getting_started.html?cp=2_0_3_3">Getting Started Guide</a></strong> on the infocenter, under <strong><a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/development/nrf52840_pdk/software_tools.html?cp=2_0_3_4">Nordic tools and downloads</a></strong> you need to select a <strong>development IDE</strong> which you will use (note that Segger Embedded Studio is free to use with Nordic products), and download the <strong>essential tools</strong> (a SDK, preferable SDK 15.2 and nRF5x Command Line Tools). <br /><br />A Getting Started Guide for Keil and Segger Embedded Studio can be found <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/development/nrf52840_pdk/keydef/PLUGINS_ROOT/com.nordic.infocenter.gs/dita/gs/sw_development.html">here</a>.<br />A Guide for Getting Started with our latest SDK (SDK 15.2) can be found <a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.sdk5.v15.2.0%2Fnrf51_getting_started.html">here </a>(Running precompiled examples, installing the SDK, and so on). <br /><br />To program the nRF52840 Dongle, you can use the built-in USB bootloader, as explained <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52/dita/nrf52/development/nrf52840_dongle/programming.html?cp=2_0_4_4">here</a>.</p> <p>Hope this helps.</p> <p>- Andreas</p><div style="clear:both;"></div>