https://devzone.nordicsemi.com/f/nordic-q-a/2072/gpios-voltage-level-on-nrf51822Hi! I wonder what is the GPIOs nominal voltage level when I&#39;m using the internal DC/DC converter? I know that the internal DC/DC converter output voltage is 1,9V but I&#39;m not sure if the GPIOs are supplied with the converter voltage 1,9V or from VDDen-USTelligent Community 13Wed, 02 Apr 2014 20:55:11 GMThttps://devzone.nordicsemi.com/thread/8860?ContentTypeID=1Wed, 02 Apr 2014 20:55:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d845040b-e71e-4e39-a2ee-957befcbdd97Stefan Birnir Sverrisson<p>Hi</p> <p>When DCDC enabled, the GPIO output high voltage will still be VDD. More specifically, between VDD-0.3 and VDD as specified in section 8.23 in the nRF51822 Product Specification.</p><div style="clear:both;"></div>