PMU Pin description

In Deep power-down only the WAKEUP pin PIO0_4 is functional. The WAKEUP function can be disabled in the DPDCTRL register to lower the power consumption even more. In this case, enable the self wake-up timer to provide an internal wake-up signal. See PMU DPDCTRL addressOffset = 0x014.

Note: When entering Deep power-down mode, an external pull-up resistor is required on the WAKEUP pin to hold it HIGH. In addition, pull the RESET pin HIGH to prevent it from floating while in Deep power-down mode.