https://devzone.nordicsemi.com/f/nordic-q-a/22893/s140-blinky-example-program-won-t-run-to-main-stuck-at-theseHello, my program stuck at these assembly codes: I decided that it was stuck because I keep pressing F11 and it just go around in circles in these 4 lines. So: First, it wait for an event, I don&#39;t know what the event is. Then it loads r4en-USTelligent Community 13Mon, 19 Jun 2017 07:36:07 GMThttps://devzone.nordicsemi.com/thread/90025?ContentTypeID=1Mon, 19 Jun 2017 07:36:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b09d5989-4483-4e56-be52-b74f90391858RK<p>well what in your own code is starting the LF clock and thus waiting for it to start?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/90026?ContentTypeID=1Mon, 19 Jun 2017 05:18:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b88928a1-4c07-4636-ac8c-0f32b1410012Mitch996<p>This is what I got for searching &quot;0104&quot; (without quote of course) in the reference manual: <a href="https://image.ibb.co/eViuNk/Capture.png">image.ibb.co/.../Capture.png</a></p> <p>Many thanks for your answer. On a side note, what does this mean? How to make it start/ make it &quot;1&quot;?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/90024?ContentTypeID=1Mon, 19 Jun 2017 04:27:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1d6653fc-bc03-4168-81c1-d9910a41b0f9RK<p>well the documentation gives you the list of all registers so it&#39;s not very hard to work out what is at 0x40000104, just look it up. The CLOCK peripherals is (one of the several) at 0x40000000 base address and the 0x104 offset is EVENTS_LFCLKSTARTED</p> <p>that&#39;s your answer, you&#39;re waiting for the LF clock to start.</p><div style="clear:both;"></div>