https://devzone.nordicsemi.com/f/nordic-q-a/3184/unexplained-current-draw-from-51422-in-system-offHi - I saw this post and I&#39;m not sure how to add a clarifying question on to it: devzone.nordicsemi.com/.../ We have a similar problem in that we built our boards with the 12k pull-down resistor on SWDCLK. We&#39;re using the Dynastream N548 module soen-USTelligent Community 13Thu, 24 Jul 2014 17:44:19 GMThttps://devzone.nordicsemi.com/thread/11721?ContentTypeID=1Thu, 24 Jul 2014 17:44:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:553f7afa-0284-4caa-b872-34ff5d27af67syntroniks<p>I love that question :&gt;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/11722?ContentTypeID=1Thu, 24 Jul 2014 09:51:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5e06a368-b94f-4b89-8f57-1ab4145df615Stefan Birnir Sverrisson<p>Hi</p> <p>That is correct, QFAAE0 version should not need the external pull-down resistor, it is provided internally on the SWDCLK pin.</p> <p>The product spec specifies 0.6uA and that is approximately what you should see on your current meter.</p> <p>After programming, make sure you power-reset the chip to get the correct current consumption reading. The chip is in debug mode after programming, which will consume high current, ~1mA.</p> <p>To measure current, disconnect any external circuit from the GPIO pins and also the programmer from the SWD pins, in order to prevent any current leak.</p> <p>To test the System Off and System On current consumption, try the standard powerdown examples given <a href="https://github.com/NordicSemiconductor/nrf51-powerdown-examples">here</a>, specifically written for this purpose.</p><div style="clear:both;"></div>