Table 4-1. Single 3.3V power supply checklist.
Signal name Recommended pin connection Description
3.0V to 3.6V
RF EMI inductor
VDDANA
Analog power supply
Decoupling/filtering capacitor,
100nF (1) to GNDANA
GNDANA
VDDIO
Connect to analog ground
3.0V to 3.6V
Analog ground
Powers I/O lines and the flash memory
Input voltage for the 1.8V regulator
USB I/O power supply
VDDIN_5
VDDIN_33
3.0V to 3.6V
3.0V to 3.6V
Stabilization output for the 1.8V regulator
Decoupling/filtering capacitors,
2.2µF (1)(2) and 470pF (1)(2)
VDDCORE
Decoupling/filtering capacitors must be added to ensure regulator stability
GNDCORE
GNDPLL
GNDIO
Connect to digital ground
Connect to digital ground
Connect to digital ground
Notes:
1. These values are given only as a typical example
2. Decoupling capacitor should be placed as close as possible to the pin
4
AVR32768
32157A-AVR-12/10
ATMEL [ ATMEL ]
