https://devzone.nordicsemi.com/f/nordic-q-a/100108/what-is-the-state-of-the-gpio-pins-during-startup-power-up-of-the-nrf5340During initial power-up, what is the state of the GPIO pins for nRF5340 ? I need to coordinate power-up with external peripherals which require a specific power-up level on the io-pin. I know this has been answered for nRF52832. Search &quot; What is theen-USTelligent Community 13Thu, 25 May 2023 09:07:40 GMThttps://devzone.nordicsemi.com/thread/427443?ContentTypeID=1Thu, 25 May 2023 09:07:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5102f4e8-d1b4-47b0-aa36-8b6a4d714142Jared<p>Hi Henning,</p> <p>During a reset, meaning while the reset pin is asserted (held low), the GPIO pins will be unspecified. <span>After power-up, or after nRESET is deasserted, the pins are floating, i.e. inputs with no pull-up and input buffer disconnected,<a href="https://infocenter.nordicsemi.com/topic/ps_nrf5340/gpio.html?cp=4_0_0_6_12_4_10#register.PIN_CNF"> which is the default reset state as specified in the documentation.</a></span></p> <p><span>In short, it&#39;s the same as for the nRF52 series.<br /><br /></span></p> <p><span>I hope that answered your question!</span></p> <p><span>regards</span></p> <p><span>Jared&nbsp;</span></p> <p><span></span></p> <h2><a href="https://infocenter.nordicsemi.com/topic/ps_nrf5340/chapters/reset/doc/reset.html?cp=4_0_0_3_9_8#reset_behavior">Retained registers</a></h2><div style="clear:both;"></div>