Datasheet

17
AT32UC3A
7. Power Considerations
7.1 Power Supplies
The AT32UC3A has several types of power supply pins:
•
VDDIO: Powers I/O lines. Voltage is 3.3V nominal.
• VDDANA: Powers the ADC Voltage is 3.3V nominal.
• VDDIN: Input voltage for the voltage regulator. Voltage is 3.3V nominal.
• VDDCORE: Powers the core, memories, and peripherals. Voltage is 1.8V nominal.
• VDDPLL: Powers the PLL. Voltage is 1.8V nominal.
The ground pins GND are common to VDDCORE, VDDIO, VDDPLL. The ground pin for
VDDANA is GNDANA.
Refer to ”Power Consumption” on page 44 for power consumption on the various supply pins.
3.3V
VDDANA
VDDIO
VDDIN
VDDCORE
VDDOUT
VDDPLL
ADVREF
3.3V
1.8V
VDDANA
VDDIO
VDDIN
VDDCORE
VDDOUT
VDDPLL
ADVREF
Single Power Supply
Dual Power Supply
1.8V
Regulator
1.8V
Regulator
32058KS–AVR32–01/12