https://devzone.nordicsemi.com/f/nordic-q-a/1642/lfclk-questionDear Nordic guy,I&#39;m developing with nrf51822. I have one question regarding lfclk. I use LFCLK SOURCE RC OSCILATOR of ble_stack_handler_init() at the application side. at this time, I have one question. If 16Mhz main(HF) clock goes to sleep or offen-USTelligent Community 13Tue, 18 Feb 2014 12:55:33 GMThttps://devzone.nordicsemi.com/thread/7225?ContentTypeID=1Tue, 18 Feb 2014 12:55:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5da79766-2561-4016-a279-89222779b387hjjeon<p>Ok.but I can&#39;t find that accept answer button.Anyway thank you very much</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/7224?ContentTypeID=1Tue, 18 Feb 2014 12:49:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b529306c-03cd-4367-bce4-89410f4814caOle Morten<p>No problem, but I&#39;d be happy if you could accept my answer instead of marking the question as resolved. Also, posting thank-you replies like this is not really needed. :-)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/7223?ContentTypeID=1Tue, 18 Feb 2014 12:46:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d6d58279-b9e3-4f26-9aa0-d02627ea377chjjeon<p>Thank you for your consideration.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/7222?ContentTypeID=1Tue, 18 Feb 2014 12:42:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3df8cd08-fad2-4c47-a353-04e1b1cb4b64Ole Morten<p>The LFCLK RC oscillator is an independent module internally in the chip, and does not depend on the HFCLK in any way. As long as the LFCLK is started, the RC oscillator will run, until it&#39;s stopped. HFCLK will only be active when a module needing it is enabled, as shown in section 8.3 in the PS.</p><div style="clear:both;"></div>