https://devzone.nordicsemi.com/f/nordic-q-a/23167/external-clockHello is a starter developer I used the nrf51822 chip on the pcb board and downloaded the example code but it did not work. When I checked the 16mhz external crystal on the pcb board, the clock was not being generated. I knew there was no need to writeen-USTelligent Community 13Fri, 30 Jun 2017 11:29:34 GMThttps://devzone.nordicsemi.com/thread/91138?ContentTypeID=1Fri, 30 Jun 2017 11:29:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4737ab5d-78c3-44b9-afb7-31bfc5f1bcb8J&#248;rn<p>What Softdevice and SDK are you using? Is it a custom board or a Devkit?</p><div style="clear:both;"></div>