https://devzone.nordicsemi.com/f/nordic-q-a/97238/nrf52840-clock-out-pin-to-check-the-output-frquencyHello Team, I am working with the nRF52840 microcontroller and I would like to know how to check the output clock frequency of the controller like any &quot;Clock_OUT&quot; pin present or can any GPIO&#39;s can be taken in consideration. I have gone through the nRF52840en-USTelligent Community 13Mon, 06 Mar 2023 05:33:08 GMThttps://devzone.nordicsemi.com/thread/413411?ContentTypeID=1Mon, 06 Mar 2023 05:33:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:949a1e98-0de4-4e93-8394-0aa896a77890Sreenath_Techo<p>Thanks for it.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/412916?ContentTypeID=1Thu, 02 Mar 2023 08:26:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:782f1469-5acc-4357-bdb8-185111dbd5a1Einar Thorsrud<p>Hi,</p> <p>There is no clock output pin. The closest you can get is to connect a TIMER to GPIOTE via PPI to toggle a pin at 8 MHz as shown in <a href="https://devzone.nordicsemi.com/f/nordic-q-a/55428/nrf52840-16-mhz-clock-out-on-gpio-pin/224864">this thread</a>. Even though the frequency is lower this is based on the same 64 MHz oscillator as all the other peripherals that use a high frequency clock, and the CPU.</p> <p>There are two high frequency clock sources, HFINT (which is used by default), and HFXO which is started as needed. The example in the thread I linked to starts the HFXO, but if you want to test with HFINT, you can comment out line 32-33.</p><div style="clear:both;"></div>