Datasheet

7
SAM4N Series [SUMMARY DATASHEET]
11158AS–ATARM–06-Jun-13
3. Signals Description
Table 3-1 gives details on the signal name 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
VDDIN
Voltage Regulator, ADC and DAC Power
Supply
Power 1.6V to 3.6V
VDDOUT Voltage Regulator Output Power 1.2V Output
VDDPLL Oscillator Power Supply Power 1.08V to 1.32V
VDDCORE Core Chip Power Supply Power
1.08V to 1.32V
Connected externally
to VDDOUT
GND Ground Ground
Clocks, Oscillators and PLLs
XIN Main Oscillator Input Input VDDIO
XOUT Main Oscillator Output Output
XIN32 Slow Clock Oscillator Input Input VDDIO
XOUT32 Slow Clock Oscillator Output Output
PCK0 - PCK2 Programmable Clock Output Output
ICE and JTAG
TCK Test Clock Input VDDIO No pull-up resistor
TDI Test Data In Input VDDIO No pull-up resistor
TDO Test Data Out Output VDDIO
TRACESWO Trace Asynchronous Data Out Output VDDIO
SWDIO Serial Wire Input/Output I/O VDDIO
SWCLK Serial Wire Clock Input VDDIO
TMS Test Mode Select Input VDDIO No pull-up resistor
JTAGSEL JTAG Selection Input High VDDIO Pull-down resistor
Flash Memory
ERASE
Flash and NVM Configuration Bits Erase
Command
Input High VDDIO
Pull-down (15 k
Ω)
resistor
Reset/Test
NRST Microcontroller Reset I/O Low VDDIO Pull-Up resistor
TST Test Mode Select Input VDDIO Pull-down resistor
Universal Asynchronous Receiver Transmitter - UARTx
URXDx UART Receive Data Input
UTXDx UART Transmit Data Output