Atmel Xplained Pro Evaluation Kit ATSAMD20-XPRO ATSAMD20-XPRO Data Sheet
Product codes
ATSAMD20-XPRO
16
Atmel | SMART SAM D20 [DATASHEET]
Atmel-42129K–SAM-D20_datasheet–06/2014
7.
Power Supply and Start-Up Considerations
7.1
Power Domain Overview
7.2
Power Supply Considerations
7.2.1
Power Supplies
The Atmel
®
SAM D20 has several different power supply pins:
z
VDDIO: Powers I/O lines, OSC8M and XOSC. Voltage is 1.62V to 3.63V.
z
VDDIN: Powers I/O lines and the internal regulator. Voltage is 1.62V to 3.63V.
z
VDDANA: Powers I/O lines and the ADC, AC, DAC, PTC, OSCULP32K, OSC32K, XOSC32K. Voltage is 1.62V to
3.63V.
3.63V.
z
VDDCORE: Internal regulated voltage output. Powers the core, memories and peripherals. Voltage is 1.2V.
The same voltage must be applied to both VDDIN, VDDIO and VDDANA. This common voltage is referred to as V
DD
in
the datasheet.
The ground pins, GND, are common to VDDCORE, VDDIO and VDDIN. The ground pin for VDDANA is GNDANA.
VOLTAGE
REGULATOR
VDDIN
VDDCORE
GND
ADC
AC
DAC
PTC
XOSC32K
OSC32K
VDDANA
GNDANA
PA[7:2]
PB[9:0]
PA[1:0]
Digital Logic
(CPU, peripherals)
DFLL48M
VDDIO
OSC8M
XOSC
OSCULP32K
PA[31:16]
PB[31:10]
PA[15:14]
BOD33
POR
PA[13:8]
BOD12