https://devzone.nordicsemi.com/f/nordic-q-a/83726/nrf5340dk-external-supply-max-limitDear, 1. what maximum voltage may be applied through the two pin connectoe marke External Supply on nRF5340Dk kit? 2. Does the Debugger works with external supply also or takes supply from USB only ?en-USTelligent Community 13Mon, 17 Jan 2022 10:31:59 GMThttps://devzone.nordicsemi.com/thread/347981?ContentTypeID=1Mon, 17 Jan 2022 10:31:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:438d779e-0770-4c37-b8bc-61a3432be43cMartin Sivertsen<p>Hi,</p> [quote user=""]what maximum voltage may be applied through the two pin connectoe marke External Supply on nRF5340Dk kit?[/quote] <p><a href="https://infocenter.nordicsemi.com/topic/ug_nrf5340_dk/UG/dk/vdd_power_sources.html?cp=3_0_4_3_2_1">3.6 V</a></p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1642410759346v1.png" alt=" " /></p> [quote user=""]Does the Debugger works with external supply also or takes supply from USB only ?[/quote] <p>In the <a href="https://infocenter.nordicsemi.com/topic/ug_nrf5340_dk/UG/dk/vdd_power_sources.html?cp=3_0_4_3_2_1">VDD power sources</a>&nbsp;and <a href="https://infocenter.nordicsemi.com/topic/ug_nrf5340_dk/UG/dk/if_mcu_power.html?cp=3_0_4_3_2_2">Interface MCU power</a>&nbsp;chapters on our Infocenter you can read a bit about it.</p> <p>In short: USB 5V needs to be present for the IMCU/debugger to get power.</p> <p>Best regards,</p> <p>Martin S.</p><div style="clear:both;"></div>