https://devzone.nordicsemi.com/f/nordic-q-a/9816/clock-source-setwhat is the clock soure setting in the demo poject of ble_app_cts_c,why i can not find the setting code?en-USTelligent Community 13Tue, 20 Oct 2015 11:54:50 GMThttps://devzone.nordicsemi.com/thread/36383?ContentTypeID=1Tue, 20 Oct 2015 11:54:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a0338f18-3a8f-40b6-a4de-508803fb48baMartinBL<p>Hi. The demo project use a softdevice and hence the high frequency clock is generated by the external 16 MHz crystal. BLE needs a high accuracy HF clock and that is why an external HF crystal is required.</p> <p>The low frequency clock source is set in the function <code>SOFTDEVICE_HANDLER_INIT()</code>. In the demo the clock source is set to <code>NRF_CLOCK_LFCLKSRC_XTAL_20_PPM</code> by default. I.e. the demo is made for a kit with a 32 kHz external crystal with an accuracy of 22 PPM.</p><div style="clear:both;"></div>