https://devzone.nordicsemi.com/f/nordic-q-a/12283/rtc-initialization-with-softdeviceI am building my application up on the ant_scalable_encrypted_tx example. I want to use RTC too, for that I took an example code off of the rtc example. The problem is that I am getting 0x1001 error code (which stands for &quot;Incorrect interrupt configurationen-USTelligent Community 13Wed, 02 Mar 2016 18:49:26 GMThttps://devzone.nordicsemi.com/thread/46432?ContentTypeID=1Wed, 02 Mar 2016 18:49:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:54b2507b-2933-4204-b513-cdfd2ad18832Sven<p>Thank you that was it.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/46431?ContentTypeID=1Wed, 02 Mar 2016 14:55:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:824145c4-09f3-4874-9065-d302e6d966f8Susheel Nuguru<p>RTC0 is protected peripheral for softdevice. You can use RTC1 instead. When you call softdevice_handler_init which inturn enables the softdevice, check is made if any protected peripherals are being configured. Error code that you mentioned is returned when softdevice finds that application is using protected peripherals.</p> <p>your second question, that seems like a hardfault, because the driver is trying to touch protected peripheral. Like I said, use RTC1 instead.</p><div style="clear:both;"></div>