NO SUPPLY: The primary battery supply voltage is not high enough to power the VRTC regulator. A global reset is asserted in this case. Everything on the device is off.
BACKUP: The primary battery supply voltage is high enough to enable the VRTC domain but not enough to switch on all the resources. In this state, the VRTC regulator is in backup mode and only the 32K oscillator and RTC module are operating (if enabled). All other resources are off or under reset.
OFF: The primary battery supply voltage is high enough to start the power-up sequence, but device power on is not enabled. All power supplies are in the OFF state except VRTC.
ACTIVE: Device POWER ON enable conditions are met and regulated power supplies are on or can be enabled with full current capability.
SLEEP: Device SLEEP enable conditions are met and some selected regulated power supplies are in low-power mode.
Figure 6-1 shows the transitions for the state machine.
PWRHOLD enables power-on unless the pin is programmed as GPI.