https://devzone.nordicsemi.com/f/nordic-q-a/17643/which-part-of-library-does-s130-start-hfclk-automaticallyHi, Could you please help me identify the file and function name that is used by the S130 softdevice to start HF clock automatically for ble advertising? I can see that Clock HAL : developer.nordicsemi.com/.../a00904.html does this, but where are theseen-USTelligent Community 13Fri, 11 Nov 2016 01:04:13 GMThttps://devzone.nordicsemi.com/thread/67844?ContentTypeID=1Fri, 11 Nov 2016 01:04:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:18785adc-5424-4a60-a2ba-c21f18ff57b0nordicdev<p>If I manually start the HF Xtal Clk before initialising the softdevice, will this HF Xtal clock be stopped/started by the softdevice whenever needed (example: there is a radio activity )? thanks.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/67843?ContentTypeID=1Fri, 11 Nov 2016 01:00:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:55845aa2-4cac-44d0-9f30-8e2e1838112dnordicdev<p>This is what I wanted to know. Great work, thanks!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/67845?ContentTypeID=1Thu, 10 Nov 2016 11:57:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:344dde08-dc8c-46c3-88ba-f5a3afb251afStian R&#248;ed Hafskjold<p>Yes, this is correct. The start and stop of the HF crystal happens inside the softdevice. This is not triggered by an application function.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/67842?ContentTypeID=1Thu, 10 Nov 2016 09:46:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:65633bce-973e-4d8f-9a77-6dcefbff2a5cKeton<p>Most likely Softdevice itself does this after you call SOFTDEVICE_HANDLER_INIT. You won&#39;t see actual call because SD is supplied as a binary. All sd_ prefixed functions are in fact only causing software interrupts that are intercepted by the binary code.</p><div style="clear:both;"></div>