SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
NOTE
The Hibernation Module requires special system implementation considerations when using HIB to control power, as it is intended to power-down all other sections of the microcontroller. All system signals and power supplies that connect to the chip must be driven to 0 V or powered down with the same regulator controlled by HIB.
The Hibernation module controls power to the microcontroller through the use of the HIB pin which is intended to be connected to the enable signal of the external regulators providing 3.3 V to the microcontroller and other circuits. When the HIB signal is asserted by the Hibernation module, the external regulator is turned off and no longer powers the microcontroller and any parts of the system that are powered by the regulator. The Hibernation module remains powered from the VBATsupply until a Wake event. Power to the microcontroller is restored by deasserting the HIB signal, which causes the external regulator to turn power back on to the chip.