https://devzone.nordicsemi.com/f/nordic-q-a/15072/slightly-excessive-current-consumption-after-programming-with-j-linkI have the nRF52 dev board and a stand-alone Segger J-Link (not the one that&#39;s on the dev board) connected to the nRF52 through the Debug In header. The firmware that gets downloaded puts the nRF52 into low-power sleep. All peripherals disabled withen-USTelligent Community 13Tue, 12 Jul 2016 13:49:08 GMThttps://devzone.nordicsemi.com/thread/57535?ContentTypeID=1Tue, 12 Jul 2016 13:49:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1f789740-53cf-43ba-bd04-8e8a9b0addaaCurtisHx<p>Debugger attached / detached doesn&#39;t make a difference. It takes a power cycle to drop the current consumption down 0.5uA</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/57534?ContentTypeID=1Tue, 12 Jul 2016 13:28:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6f19d88e-fc5a-4aea-9da1-e489a1c461b7Stian R&#248;ed Hafskjold<p>You should always power cycle the board after programming. In debug mode it consumes in the mA range, so I&#39;m not really sure what the extra 0.5uA are. It could be some leakage current going through the SWD lines. Try to disconnect the debugger to see if the current drops back down.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/57533?ContentTypeID=1Mon, 11 Jul 2016 19:15:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7b899b8e-ccfa-4969-a36a-373e0300d142Wojtek<p>Ok, I commented according to my knowledge on nRF51, sorry. On nRF51 i think it was about 2mA, but you said you are observing uA. I may be wrong then, sorry for misleading answer.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/57532?ContentTypeID=1Mon, 11 Jul 2016 18:21:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4feef755-3f89-4ccc-a495-29f3769de2afCurtisHx<p>@Wojtek I see references to current consumption in the 2-5A rang when the nRF52 is in debug mode, which is what I see when debugging the chip. However, after programming the chip and issuing the SWD reset sequence, the current consumption is about 0.5uA more than expected.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/57531?ContentTypeID=1Mon, 11 Jul 2016 14:47:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5ebf387c-ffc5-467b-9f43-e7534c4fff49Wojtek<p>yes, it is expected. after programming chip is in debug mode which needs more current. this is described in more details all around here in devzone.</p><div style="clear:both;"></div>