https://devzone.nordicsemi.com/f/nordic-q-a/80087/there-is-a-10-ms-delay-when-the-nrf52840-module-is-first-powered-on-why-might-this-delay-be-causedOn the nrf52840 module, when I first output to one of the GPIO pins when I load any softdevice ble_peripheral instance I have installed. 10 ms after the VDD pin is energized, it gives output to that pin. It is not normal for the processor on the nrf52840en-USTelligent Community 13Wed, 29 Sep 2021 11:23:03 GMThttps://devzone.nordicsemi.com/thread/331690?ContentTypeID=1Wed, 29 Sep 2021 11:23:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ed56259e-91ce-47cb-b90c-a5163b624df4stri<p>Thank you for your support, but how can we set the VDD rise time on the softdevice?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/331677?ContentTypeID=1Wed, 29 Sep 2021 10:54:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8d524075-ca41-455b-afd7-6bc4d7bf0553Kenneth<p>The startup time will depend on the VDD rise time and if pin reset is enabled:<br /><a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/power.html#unique_1165195997">https://infocenter.nordicsemi.com/topic/ps_nrf52840/power.html#unique_1165195997</a></p> <p>If you also initialize the softdevice before using gpio, then the startup of the 32kHz LFCLK will also contribute to the startup time.</p> <p>Kenneth</p><div style="clear:both;"></div>