SAM3X datasheet(7/71 Pages) ATMEL

7 / 71 page

11057BS–ATARM–13-Jul-12

SAM3X/A

11057BS–ATARM–13-Jul-12

SAM3X/A

Signal Description

Table 3-1 gives details on the signal names classified by peripheral.

Table 3-1.

Signal Description List

Signal Name

Function

Type

Active

Level

Voltage

Reference

Comments

Power Supplies

VDDIO

Peripherals I/O Lines Power Supply

Power

1.62V to 3.6V

VDDUTMI

USB UTMI+ Interface Power Supply

Power

3.0V to 3.6V

VDDOUT

Voltage Regulator Output

Power

VDDIN

Voltage Regulator, ADC and DAC Power

Supply

Power

GNDUTMI

USB UTMI+ Interface Ground

Ground

VDDBU

Backup I/O Lines Power Supply

Power

1.62V to 3.6V

GNDBU

Backup Ground

Ground

VDDPLL

PLL A, UPLL and Oscillator Power Supply

Power

1.62 V to 1.95V

GNDPLL

PLL A, UPLL and Oscillator Ground

Ground

VDDANA

ADC and DAC Analog Power Supply

Power

2.0V to 3.6V

GNDANA

ADC and DAC Analog Ground

Ground

VDDCORE

Core Chip Power Supply

Power

1.62V to 1.95V

GND

Ground

Clocks, Oscillators and PLLs

XIN

Main Oscillator Input

Input

VDDPLL

XOUT

Main Oscillator Output

Output

XIN32

Slow Clock Oscillator Input

Input

VDDBU

XOUT32

Slow Clock Oscillator Output

Output

VBG

Bias Voltage Reference

Analog

PCK0 - PCK2

Programmable Clock Output

Output

Shutdown, Wakeup Logic

SHDN

Shut-Down Control

Output

VDDBU

0: The device is in

backup mode

1: The device is

running (not in

backup mode)

FWUP

Force Wake-up Input

Input

VDDBU

Needs external Pull-

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