https://devzone.nordicsemi.com/f/nordic-q-a/4243/exiting-swd-modeI have code that uses two GPIOs to program an NRF51822 via SWD mode. This code all works fine and suceeds in programming the device. What I would like to do is get the NRF51822 to exit SWD mode, returning the pins to their previous function (eg. RESETen-USTelligent Community 13Wed, 29 Oct 2014 21:19:45 GMThttps://devzone.nordicsemi.com/thread/15159?ContentTypeID=1Wed, 29 Oct 2014 21:19:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ed268c67-6e6d-4078-bf39-2d241ffb0d75Charles Manning<p>I found the answer in the ref manual</p> <p>Normal mode can always be resumed by performing a &quot;hard-reset&quot; through the SWD interface:</p> <ol> <li>Enter debug interface mode.</li> <li>Enable reset through the RESET register in the POWER peripheral.</li> <li>Hold the SWDCLK and SWDIO/nRESET line low for a minimum of 100 μs.</li> </ol> <p>I had misread this to mean that doing any of the above would do it.</p> <p>You need to do all of these steps in the sequence shown above.</p><div style="clear:both;"></div>