Both supply VDDH and VDD in nRF52840https://devzone.nordicsemi.com/f/nordic-q-a/94705/both-supply-vddh-and-vdd-in-nrf52840Below images detail given about VDD and VDDH in nRF52840_PS_v1.7 datasheet (5.3.1 Main supply) . According to this we can not connect both supplies simultaneously right?, if yes then why are both supplies connected in the nRF52840 DK reference schematicen-USTelligent Community 13Fri, 09 Dec 2022 14:22:05 GMTRE: Both supply VDDH and VDD in nRF52840https://devzone.nordicsemi.com/thread/399960?ContentTypeID=1Fri, 09 Dec 2022 14:22:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:77c651fa-4c91-4ea7-9ec8-f6772dae8b2bketiljo<p>Yes, normal voltage mode, max 3.6 V,&nbsp;is when VDDH is connected to VDD. High voltage mode is when VDDH is suppled with a higher voltage, max 5.5 V. For instance USB supply.</p><div style="clear:both;"></div>RE: Both supply VDDH and VDD in nRF52840https://devzone.nordicsemi.com/thread/399900?ContentTypeID=1Fri, 09 Dec 2022 11:42:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1bd92072-caab-4866-b630-8fafdf2d6debVikas Bhatt<p>Hello Ketiljo,</p> <p>If we shorten VDDH to VDD_nRF then it will be in normal mode so it will work fine right? What are the advantages in the above image configuration?</p><div style="clear:both;"></div>RE: Both supply VDDH and VDD in nRF52840https://devzone.nordicsemi.com/thread/399857?ContentTypeID=1Fri, 09 Dec 2022 09:16:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0a55d153-31f2-4de3-9d27-136480be110dketiljo<p>In this case, only VDDH is powered externally. VDD_nRF comes out from REG0 and needs to be connected to the other VDD pins to power the device.&nbsp;&nbsp;</p> <p>See&nbsp;<a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/power.html#unique_1591758884">https://infocenter.nordicsemi.com/topic/ps_nrf52840/power.html#unique_1591758884</a></p><div style="clear:both;"></div>