https://devzone.nordicsemi.com/f/nordic-q-a/30888/what-context-does-the-softdevice-run-inInterrupt or main() context, or something else? We&#39;re using S140 SoftDevice, nRF52840 and Segger Embedded Studio 3.30 We&#39;re also usinq Quantum Leaps ( https://www.state-machine.com/ ) as our OS How the SoftDevice works is still somewhat mysteriousen-USTelligent Community 13Mon, 26 Feb 2018 20:59:59 GMThttps://devzone.nordicsemi.com/thread/122009?ContentTypeID=1Mon, 26 Feb 2018 20:59:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:534fce0b-4d5f-4649-acab-ef5d2cd7b067H&#229;kon Alseth<p>Hi,</p> <p></p> <p>S140 is still in alpha-state, and the full softdevice specification is not yet available.</p> <p>For the interrupt model, you can look at the S132 SDS:&nbsp;<a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.sds/dita/softdevices/s130/processor_avail_interrupt_latency/exception_mgmt_sd.html?cp=2_3_1_0_15_1">http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.sds/dita/softdevices/s130/processor_avail_interrupt_latency/exception_mgmt_sd.html?cp=2_3_1_0_15_1</a></p> <p>I recommend checking the usage patters here for typical timing details on the different roles:&nbsp;<strong><a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.sds/dita/softdevices/s130/processor_avail_interrupt_latency/ble_usage_patterns.html">Bluetooth low energy processor usage patterns</a></strong></p> <p></p> <p>Cheers,</p> <p>H&aring;kon</p><div style="clear:both;"></div>