https://devzone.nordicsemi.com/f/nordic-q-a/98398/dcdc-disable-failsWe have a custom board that do not use the dcdc (we didn&#39;t connect the inductor) I am working with zephyr nrf connect. We have problem on bring- up our board and we suspect that the problem is because the cpu is in dcdc mode while we do not have theen-USTelligent Community 13Tue, 04 Apr 2023 13:54:42 GMThttps://devzone.nordicsemi.com/thread/419071?ContentTypeID=1Tue, 04 Apr 2023 13:54:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b4c3cab8-31b1-4e1f-83c7-ebf609775a3cKazi Afroza Sultana<p>Hi,</p> <p>Great that you have solved the problem. Since your board does not have LF crystal so setting this <span>CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y RC oscillator solved the problem.</span></p> <p><span>Thanks.</span></p> <p><span>BR</span></p> <p><span>Kazi</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/419036?ContentTypeID=1Tue, 04 Apr 2023 11:22:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bf1ec538-4456-4050-beb4-44be9bfa8e12ilanr<p>Hi&nbsp;</p> <p>We finally found the reason why our cpu didn&#39;t came up. We had to define in the prj.conf:</p> <p><span>CONFIG_BOARD_ENABLE_DCDC=n</span><br /><span>CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y</span></p> <p><br /><span>These configuration set to work with no dcdc and rc instead&nbsp;of 32k oscillator.</span><br /><span>In the evaluation board there is dcdc parts and external 32k osc and in our board we do not have it. So the app was stack before reaching main because&nbsp;the lack of 32k osc in our board. After setting correctly the app was running correctly.</span></p> <p><span></span></p><div style="clear:both;"></div>