Random RESETREAS 0x00010000

[Dajgoro Labinac]

Hi.

I loaded the ble app uart demo and added some bits of code to read some i2c sensors. I also added a buzzer which buzzes on powerup (simple for loop). I would leave the thing powered on the side and go do other things and i could notice the startup buzz at random times. I previously also noticed that the mcu would restart for no apparent reason. When checking the RESETREAS register it returns 0x00010000. Datasheet says that is: "Reset due to wake up from System OFF mode when wakeup is triggered from DETECT signal from GPIO". How exactly does that occur, and how to disable it?

[Petter Myhre]

If you don't want to go to system off, just don't call sleep_mode_enter() or sd_power_system_off().

The DETECT signal from any GPIO wakes it up. You can read more about it in the nRF51 RM 3.0.1, Chapter 14.1.