https://devzone.nordicsemi.com/f/nordic-q-a/73494/bl653-module-with-nrf52833Hi, I am using BL653 module with nRF52833, I have an issue about using USB with normal voltage mode(I am using 3.3V external power supply).Do I need to left VDD_HV pin unconnected when using USB or VDD_HV pin should be tied with VDD pin as normal voltageen-USTelligent Community 13Tue, 06 Apr 2021 11:19:28 GMThttps://devzone.nordicsemi.com/thread/303111?ContentTypeID=1Tue, 06 Apr 2021 11:19:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c953692d-c3d0-4352-9a50-fb736d0c2599run_ar<p>Hi,</p> <p>As far as I can see from the product specification, VDDH should be connected to VDD when operating in normal mode like <span><a title="Circuit configuration no. 3 for QIAA aQFN73" href="https://infocenter.nordicsemi.com/topic/ps_nrf52833/ref_circuitry.html?cp=4_1_0_6_2_2#unique_152840205">Circuit configuration no. 3 for QIAA aQFN73</a></span>.</p><div style="clear:both;"></div>