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Unwanted reset

Hi, I'm working on a firmware that is used in a nrf51822. I discovered an unwanted behavior of my system. When the system is in power_manage mode, it can wake up in two different ways:

  • pressing a button
  • waiting 10 minutes

After pressing the button or having waited 10 minutes, the system wakes up and a 3 minutes timer starts to count from 180 seconds to 0. After reaching the 0 second, the system enters power manage mode again. When the system wakes up after having waited 10 minutes, the 3 minutes timer has no problem to reach the second 0. On the contrary, after pressing the button, the 3 minutes timer has problems to reach 0 second because there's an unwanted reset after a few seconds. Anyone can give me an explanation? Thanks!

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