nRF52840 VDD voltage during reset in high voltage modehttps://devzone.nordicsemi.com/f/nordic-q-a/62630/nrf52840-vdd-voltage-during-reset-in-high-voltage-modeHi, As mentioned in &quot;nRF52840 Product Specification v1.0&quot;, I have setup the high voltage mode, and use VDD as an external power of 3.3V by setting NRF_UICR -&gt; REGOUT0 to UICR_REGOUT0_VOUT_3V3. Normally it work fine, but when I reset the boarden-USTelligent Community 13Wed, 17 Jun 2020 09:33:51 GMTRE: nRF52840 VDD voltage during reset in high voltage modehttps://devzone.nordicsemi.com/thread/255452?ContentTypeID=1Wed, 17 Jun 2020 09:33:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1c8ef72e-826e-4340-a6a6-5c6273fbc9d0J&#248;rgen Holmefjord<p>Hi,</p> <p>I tested on one of my DKs, and it seems that you are correct, VDD is reading 1.8 V in high voltage mode during reset. Most likely the UICR register config is read during the&nbsp;boot procedure after reset, and during reset, the default value will be used to configure the regulator.</p> <p>Unfortunately, I can&#39;t think of any workaround to keep VDD at 3.3 V during reset.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>