I have an issue with my SAMD21 board. The board consumes around 40uA in SLEEPDEEP mode. Only, after reprogramming the board, it consumes around 9mA. A lot more... The reset cause after reprogramming the board is 64, System Reset Request.

The low power sleep code:

setup(){
   // Sets SLEEPDEEP
   SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
} 

loop(){
   // Put SAMD in sleep
   __WFI()
}

The board goes back in sleep when the battery is unplugged/plugged back in. I can't figure out why the board doesn't sleep after programming.

Any help?