Datasheet

SAM3X / SAM3A [DATASHEET]
Atmel-11057C-ATARM-SAM3X-SAM3A-Datasheet_23-Mar-15
24
Figure 5-4. Backup Batteries Used
Note: 1. Restrictions
For USB, VDDUTMI needs to be greater than 3.0V.
For ADC, VDDANA needs to be greater than 2.0V.
For DAC, VDDANA needs to be greater than 2.4V.
2. VDDUTMI and VDDANA cannot be left unpowered.
VDDIN
Voltage
Regulator
VDDOUT
Main Supply (1.62–3.6 V)
VDDCORE
Backup Batteries
VDDBU
VDDIO
VDDANA
VDDUTMI
VDDPLL
FWUP
SHDN