https://devzone.nordicsemi.com/f/nordic-q-a/55725/nrf52840-reset-taking-good-amount-of-timeHi, I am testing the ble blinky example as it is from SDK v16.0.0. I am seeing a good amount of time(~340ms) from reset(pin reset) to advertise the first packet. I am keen to know that cause. I don&#39;t find any information regarding this time in DSen-USTelligent Community 13Wed, 18 Dec 2019 06:27:33 GMThttps://devzone.nordicsemi.com/thread/226009?ContentTypeID=1Wed, 18 Dec 2019 06:27:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6095ed1f-6ae7-4a1f-ace3-5a6ae238db8aSimonr<p>Hi Sridhar</p> <p>Most of this startup time is the LFXO startup, which is specified in the product specification to take ~250ms. This, plus initialization of the radio, etc. accumulate to the ~340ms you are seeing, so this is the expected reset time for a reset when using the external LF clock.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>