https://devzone.nordicsemi.com/f/nordic-q-a/40629/nrf52840-open-drain-gpionRF52840 SDK 15.2 I want to control the power of sensor, so I configurate the pin like this: nrf_gpio_cfg(AFE4403_PIN_PWR_EN, NRF_GPIO_PIN_DIR_OUTPUT, NRF_GPIO_PIN_INPUT_DISCONNECT, NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_S0D1, NRF_GPIO_PIN_NOSENSE); en-USTelligent Community 13Fri, 23 Aug 2019 06:36:23 GMThttps://devzone.nordicsemi.com/thread/205743?ContentTypeID=1Fri, 23 Aug 2019 06:36:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cdb8988b-a58b-46dc-a2bf-ca02e3ded6eaTerry Tan<p>Hi, You have to use VDD, don&#39;t use VDDH, because this is chip mistake. Voltage of VBAT must equal the GPIO_pin&nbsp;&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/205739?ContentTypeID=1Fri, 23 Aug 2019 05:50:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:30db4c27-7810-416a-9406-03c1211436f3PKSHER<p>hi. I am also working on a similar thing. Just wanted to know what solved your issue?</p> <p></p> <p>Regards</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/157863?ContentTypeID=1Mon, 19 Nov 2018 06:11:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:47819192-2013-444a-bc05-3c43667ed2dbTerry Tan<p>I find this &quot;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/28373/nrf52810-open-drain-gpio">https://devzone.nordicsemi.com/f/nordic-q-a/28373/nrf52810-open-drain-gpio&quot;,</a>. I understand it! If the gpio is higher than VDD+0.3V, the pull up will auto turn on, so the S0D1 is quasi open drain.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/157857?ContentTypeID=1Mon, 19 Nov 2018 03:51:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:aa6c93f1-92e4-45ee-a7c1-c77809957d53Turbo J<p>There is a diode between GPIO pin and VCC in he NRF chip -&nbsp; see absolute maximum ratings.</p> <p>This will prevent the gate voltage to get close enough to source, and the mosfet will stay open.</p><div style="clear:both;"></div>