https://devzone.nordicsemi.com/f/nordic-q-a/42784/nrf52840-i-o-levelI was wondering what determines the logic level of the nRF52840 interfaces? Is it whatever you supply VDD with? For example, if I supply VDD with 2.8V, will the logic level of the I2C interface or PWM interface be 2.8V?en-USTelligent Community 13Mon, 21 Jan 2019 04:57:35 GMThttps://devzone.nordicsemi.com/thread/166701?ContentTypeID=1Mon, 21 Jan 2019 04:57:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c79e080-ebe5-4238-9a2d-f0f2e21c546fAshish<p>Hi,</p> <p></p> <p>Please take a look at&nbsp;<a href="https://www.nordicsemi.com/DocLib/Content/Product_Spec/nRF52840/latest/gpio?335#unique_288529932" rel="noopener noreferrer" target="_blank">Electrical Specifications</a>. The high output voltage is between VDD-0.4 to VDD.</p><div style="clear:both;"></div>