https://devzone.nordicsemi.com/f/nordic-q-a/127403/nrf54lm20-dk-vdd-nrfHi there, I was designing an add-on development board to go onto the development kit to test a 1.8V application. I need VDD:nRF on the 54LM20 to be set as the same as VDD:IO of 1.8V instead of directly the USB power. I have shorted SB21 and achieveden-USTelligent Community 13Thu, 12 Mar 2026 15:01:46 GMThttps://devzone.nordicsemi.com/thread/563152?ContentTypeID=1Thu, 12 Mar 2026 15:01:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f4f6957a-1011-4f34-88ab-c8d5ea2e0ac9Oli Perez Oxalis<p>Undone the SB bridge4 and used nRF Connect! Was unaware of the voltage-setting feature, thanks all sorted!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/563146?ContentTypeID=1Thu, 12 Mar 2026 14:32:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:58df23c9-7da1-457d-b3d5-8fd7fbbe56c4PaKa<p>The board handled this in the default configuration. You should run with that and use the tool Einar linked to to actually change the operating voltage. So shorting SB21 makes this an issue and should only be done if you need it and then you have to handle this during use.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/563143?ContentTypeID=1Thu, 12 Mar 2026 14:25:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2afaf9f9-030d-43d5-8d57-65d4a9ad7267Oli Perez Oxalis<p>How can I make them the same? Just short them through which resistor?&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/563140?ContentTypeID=1Thu, 12 Mar 2026 14:06:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:deee917e-a322-45fd-8eeb-f530e4f1cc51PaKa<p>Note: VDD:nRF and VDD:IO should always be the same. The configuration you have now may allow them to be separated and you should make sure they are the same.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/563106?ContentTypeID=1Thu, 12 Mar 2026 12:22:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e22e1f94-aa95-4005-83dd-540cd1f55360Einar Thorsrud<p>Hi,</p> <p>You can&nbsp; set the VDD voltage on the DK using the <a href="https://docs.nordicsemi.com/bundle/nrf-connect-board-configurator/page/index.html">Board Configurator app</a>. It looks like this. Remember to press the &quot;Write config&quot; button for the changes to take effect.</p> <p><img style="max-height:240px;max-width:320px;" alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/board_5F00_configurator_5F00_set_5F00_votlage.png" /></p><div style="clear:both;"></div>