16.5.2 Power Management

The BOD33 and BOD12 can trigger resets when the I/O supply or core supply voltages drop below the programmed threshold value. BOD33 and BOD12 can additionally wake up the system from standby mode when I/O or core supply failure is detected. However, BOD33 and BOD12 cannot be used in continuous mode when the system is in standby mode, and will, therefore, be automatically disabled until the system is woken up. Only sampled mode operation is allowed when the system is in standby mode.

All oscillators except XOSC32K, OSC32K and OSCULP32K are turned off in some sleep modes and turned automatically on when the chip wakes up.

The SYSCTRL can continue to operate in any sleep mode where the selected source clock is running. The SYSCTRL interrupts can be used to wake up the device from sleep modes. The events can trigger other operations in the system without exiting sleep modes. Refer to PM – Power Manager on the different sleep modes.