https://devzone.nordicsemi.com/f/nordic-q-a/15286/timer2-with-s110-v1-sdkv6-not-working-righti have ble running perfect in nrf51422 until i turn timer 2 on and this is code for init timer2 void timer2_init(void) { NRF_TIMER2-&gt;MODE = TIMER_MODE_MODE_Timer; NRF_TIMER2-&gt;BITMODE = TIMER_BITMODE_BITMODE_16Bit &lt;&lt; TIMER_BITMODE_BITMODE_Pos;en-USTelligent Community 13Thu, 21 Jul 2016 11:05:37 GMThttps://devzone.nordicsemi.com/thread/58390?ContentTypeID=1Thu, 21 Jul 2016 11:05:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1225b529-7c05-445d-9f09-483abf005402&#216;yvind Karlsen<p>Hi,</p> <p>Is the HF clock initialized? You can request it while the SoftDevice is running by calling:</p> <pre><code>uint32_t running = 0; sd_clock_hfclk_request(); while(! p_is_running) { // Wait for the crystal to start sd_clock_hfclk_is_running((&amp;p_is_running)); } </code></pre> <p>You can stop the HFCLK when it is no longer needed by calling</p> <pre><code>sd_clock_hfclk_release(); </code></pre> <p>Best regards,</p> <p>Øyvind</p><div style="clear:both;"></div>