How to set LFRC as the LFCLK clock source for nRF52840https://devzone.nordicsemi.com/f/nordic-q-a/104384/how-to-set-lfrc-as-the-lfclk-clock-source-for-nrf52840Hello, I am using &quot;nRF Connect SDK v2.3.0&quot; with &quot;nRF52840&quot;. I would like to set LFRC as the LFCLK clock source. Please let me know if the following &lt;prj.conf&gt; settings are sufficient in the environment below. &lt; prj.conf &gt; &lt;Enviroment&gt; Hardwareen-USTelligent Community 13Thu, 05 Oct 2023 05:58:32 GMTRE: How to set LFRC as the LFCLK clock source for nRF52840https://devzone.nordicsemi.com/thread/448924?ContentTypeID=1Thu, 05 Oct 2023 05:58:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7bd506c4-b35c-4632-8930-17c79eb1507cTsuKawa<p><span>I appreciate for your help.&nbsp;</span></p> <p><span>I will give it a try.</span></p><div style="clear:both;"></div>RE: How to set LFRC as the LFCLK clock source for nRF52840https://devzone.nordicsemi.com/thread/448923?ContentTypeID=1Thu, 05 Oct 2023 05:46:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:93da5396-905e-43c6-a805-c296ed6d5948Vidar Berg<p>Hello,</p> <p>Only&nbsp;CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y is needed. CONFIG_CLOCK_CONTROL_NRF_K32SRC_500PPM will be selected automatically when RC is selected as can be seen here <a href="https://github.com/nrfconnect/sdk-zephyr/blob/328411d85839340607fe033fa4de4f59cb2eb038/drivers/clock_control/Kconfig.nrf#L132">link</a>.&nbsp;CONFIG_SYSTEM_CLOCK_WAIT_FOR_STABILITY is also enabled by default, see <a href="https://github.com/nrfconnect/sdk-zephyr/blob/328411d85839340607fe033fa4de4f59cb2eb038/drivers/timer/Kconfig.nrf_rtc#L45">https://github.com/nrfconnect/sdk-zephyr/blob/328411d85839340607fe033fa4de4f59cb2eb038/drivers/timer/Kconfig.nrf_rtc#L45</a>.&nbsp;</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>