https://devzone.nordicsemi.com/f/nordic-q-a/116682/nrf5340-lfclk-sources-controlHi, I would like to ask when using zephyr&#39;s k_timer it uses a clock from LFCLK, then it can be generated in the following three ways: 32.768 kHz RC oscillator (LFRC) 32.768 kHz crystal oscillator (LFXO) 32.768 kHz synthesized from HFCLK (LFSYNT) en-USTelligent Community 13Mon, 25 Nov 2024 13:09:35 GMThttps://devzone.nordicsemi.com/thread/511900?ContentTypeID=1Mon, 25 Nov 2024 13:09:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6e87d7db-6112-45ac-b624-d272e5b20028Zion<p>Ok, thank you for your reply.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/511888?ContentTypeID=1Mon, 25 Nov 2024 12:33:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:79e8a4d3-b4a9-48c6-8fae-c46636da146cVidar Berg<p>Hi,</p> <p>The Zephyr timer the system clock driver API to create timeout events with rtc1, same as the scheduler. So, the configurations you listed are enabled by default. You can confirm this by checking the generated configuration file in build/&lt;app project name&gt;/zephyr/.config.</p> <p>If you want to test with other clock sources, it is sufficient to enable CONFIG_<span>CLOCK_CONTROL_NRF_K32SRC_RC or CONFIG_CLOCK_CONTROL_NRF_K32SRC_SYNTH and remove the&nbsp;CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=y line from your project configuration.</span></p> <p><span>Best regards,</span></p> <p><span>Vidar</span></p><div style="clear:both;"></div>