In addition to the supply domains, such as VDDIO, VDDIN and VDDANA, the device provides these power
domains:
- PD0, PD1, PD2
- PDTOP
- PDBACKUP
The PD0, PD1 and PD2 are "switchable power domains". In standby or backup sleep mode, they can be turned off to save leakage consumption according to user configuration.
The three peripheral domains, PD0, PD1, and PD2, can be in retention state when none of the contained peripherals are required, but if a peripheral power domain PDn is powered, lower power domains will be powered, too. For example, if no peripherals are being used in PD2 and one or several peripherals in PD1 are active, then PD2 will be powered down, PD1 will be powered, and PD0 will automatically be powered, even if no peripheral is being used.
Figure 1. Power Domain Partitioning
