Datasheet

18
6430FS–ATARM–10-Feb-12
SAM3U Series
Figure 5-3. Backup Batteries Used
Note: Restrictions
With Main Supply < 2.0 V, USB and ADC are not usable.
With Main Supply ≥ 2.4V and < 3V, USB is not usable.
With Main Supply ≥ 3V, all peripherals are usable.
VDDIN
Voltage
Regulator
VDDOUT
Main Supply (1.62V-3.6V)
VDDCORE
Backup Batteries
VDDBU
VDDIO
VDDANA
VDDUTMI
VDDPLL
FWUP
SHDN