https://devzone.nordicsemi.com/f/nordic-q-a/41414/related-to-power-consumptionDear Nordic, I have an application which contain UART and BLE advertising. For power consumption i use enable disable UART. Enable and Disable Uart:- Is it right way to enable and disable UART? If i do this way what is the maximum current takenen-USTelligent Community 13Fri, 21 Dec 2018 11:01:52 GMThttps://devzone.nordicsemi.com/thread/162821?ContentTypeID=1Fri, 21 Dec 2018 11:01:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ec152ce6-20b2-43ce-944f-03b9cd96a0f7Tim<p>Hi, we had the same issue and it was fixed by the answer given in this thread :&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/26030/how-to-reach-nrf52840-uarte-current-supply-specification/102605#102605">devzone.nordicsemi.com/.../102605</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/160993?ContentTypeID=1Mon, 10 Dec 2018 13:08:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b8432018-d371-4fd8-874f-0f473a6de627Stian R&#248;ed Hafskjold<p>UART in RX mode consumes about 400-600 uA depending on if DCDC is enabled or not.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/160966?ContentTypeID=1Mon, 10 Dec 2018 12:18:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:30704238-10a7-4349-b0d3-e613b648fef4Alan Ajit<p>Thanks for your quick replay. you said that if i disable UART&nbsp; it&#39;s not consume Current am i right(ie calling above disable function:- Disable_Uart())?</p> <p>If i use UART(disable and enable UART) and BLE advertising how much current will consume(approximately)?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/160960?ContentTypeID=1Mon, 10 Dec 2018 12:04:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8942289c-44a9-4086-879b-9ebc8d6630beStian R&#248;ed Hafskjold<p>If you are using the UART driver I think you should use the init/uninit functions in the driver. <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.2.0/group__nrfx__uarte.html?cp=4_0_0_6_9_0_31_0_20#gaa31a9d9e52bfa9196f0dd13bb574eb4d">http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.2.0/group__nrfx__uarte.html?cp=4_0_0_6_9_0_31_0_20#gaa31a9d9e52bfa9196f0dd13bb574eb4d</a></p> <p>If not, the way you do it should be fine, as long as you handle it the right way. i.e. making sure ongoing transactions are finished etc.</p> <p>You can also set all GPIOs to input and disable the input buffer so you don&#39;t power the UART slave through the GPIOs.</p> <p>The UART should not consume any current if uninitialized correctly.</p><div style="clear:both;"></div>