https://devzone.nordicsemi.com/f/nordic-q-a/3404/nrfstudio-softdeviceusing the nrfGoStudio to program s110_nrf51822_6.0.0_softdevice.hex Tools: Jlink,SWD mode as the figure: but there are some problem 1:we can download demo BlinkLed and run it well! But we can not connect to device with nrfGoStudio,see theen-USTelligent Community 13Thu, 07 Aug 2014 11:43:28 GMThttps://devzone.nordicsemi.com/thread/12350?ContentTypeID=1Thu, 07 Aug 2014 11:43:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2a89faaa-6e01-4a60-af41-a4f9946c9e18H&#229;kon Alseth<p>Have you tried using nrfjprog instead? It should be located in your path if you&#39;ve installed the nRF51 SDK. Just open cmd and call this to erase the chip:</p> <pre><code>nrfjprog -e </code></pre> <p>If you want to use it for other functionality, please check out the help output:</p> <pre><code>nrfjprog --help </code></pre> <p>Cheers, Håkon</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/12349?ContentTypeID=1Thu, 07 Aug 2014 11:30:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c43c356b-2f56-439a-81eb-5a66f59df8d8Steven_wang<p>when connect to the device with nRFgo Studio I cut off the power and power on ,it can erase the chip!!!</p><div style="clear:both;"></div>