https://devzone.nordicsemi.com/f/nordic-q-a/5501/about-software-interruptHello, I am working with nRF51822 development kit (s130 softdevice). I want to use one software interrupt for my custom application. Is there any software interrupt available for user? In the arm_startup_file I could see that SWI0 to SWI5 are used foren-USTelligent Community 13Tue, 10 Feb 2015 11:50:54 GMThttps://devzone.nordicsemi.com/thread/19216?ContentTypeID=1Tue, 10 Feb 2015 11:50:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:58e2c319-ee17-4b6e-8b55-8de32d47cda8Hung Bui<p>Hi Anjaly, You will have SWI0 free to use in the application</p> <p>And if you want to have a second one you can use SWI1, but make sure you don&#39;t use radio notification or timeslot API.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/19215?ContentTypeID=1Mon, 09 Feb 2015 10:00:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2eeb8401-b400-49b9-a680-552b6aade2bbAnjaly<p>thank you for your immediate reply.. actually I want two SWIs. SWI0 is already used for timer. Is there any other way to get the second one??</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/19214?ContentTypeID=1Mon, 09 Feb 2015 09:50:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:eb3795bc-f0fb-458f-bfb2-bd86930d5317RK<p>If you look at the softdevice specification for the S130 you&#39;ll see that SW0 is unused by the softdevice and available for the application.</p><div style="clear:both;"></div>