SAM3U Datasheet, PDF (5/59 Pages) ATMEL Corporation – AT91SAM ARM-based Flash MCU

SAM3U Series
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
Power Supplies
VDDIO
Peripherals I/O Lines Power Supply
Power
VDDIN
Voltage Regulator Input
Power
VDDOUT
Voltage Regulator Output
Power
VDDUTMII
USB UTMI+ Interface Power Supply
Power
GNDUTMII
USB UTMI+ Interface Ground
Ground
VDDBU
Backup I/O Lines Power Supply
Power
GNDBU
Backup Ground
Ground
VDDPLL
PLL A, UPLL and OSC 3-20 MHz Power Supply Power
GNDPLL
PLL A, UPLL and OSC 3-20 MHz Ground
Ground
VDDANA
ADC Analog Power Supply
Power
GNDANA
ADC Analog Ground
Ground
VDDCORE
Core, Memories and Peripherals Chip Power
Supply
Power
GND
Ground
Ground
Clocks, Oscillators and PLLs
XIN
Main Oscillator Input
Input
XOUT
Main Oscillator Output
Output
XIN32
Slow Clock Oscillator Input
Input
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
FWUP
TCK/SWCLK
TDI
TDO/TRACESWO
TMS/SWDIO
Force Wake-Up Input
Input
Low
Serial Wire/JTAG Debug Port (SWJ-DP)
Test Clock/Serial Wire Clock
Input
Test Data In
Input
Test Data Out/Trace Asynchronous Data Out Output⁽⁴⁾
Test Mode Select/Serial Wire Input/Output
Input
JTAGSEL
JTAG Selection
Input
High
Voltage
Reference Comments
1.62V to 3.6V
1.8V to 3.6V
1.8V
3.0V to 3.6V
1.62V to 3.6V
1.62 V to 1.95V
2.0V to 3.6V
1.62V to 1.95V
VDDPLL
VDDBU
VDDIO
VDDBU
push/pull
0: The device is in
backup mode
1: The device is running
(not in backup mode)
Needs external pull-up
VDDIO
No pull-up resistor
No pull-up resistor
VDDBU
No pull-up resistor
Internal permanent
pull-down
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6430ES–ATARM–22-Aug-11