Datasheet

9
11057BS–ATARM–13-Jul-12
SAM3X/A
9
11057BS–ATARM–13-Jul-12
SAM3X/A
3. 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 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-
up