Atmel SAM4N Xplained Pro, User Manual

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Atmel SAM4N Xplained Pro [USER GUIDE]
42104A-MCU-06/2013
11
Pin on header SAM4N pin Function Shared functionality
4 PC25 TCLK3
5 PC28 TCLK4
6 PC31 TCLK5
7 PC16 PCK0
8 PC17 PCK1
9 PA31 PCK2
10 PB4 PWM2
11 - - VCC
12 - - GND
Table 4-5. SPARE SIGNALS header 2
Pin on header SAM4N pin Function Shared functionality
1 PA15 UTXD2
2 PA16 URXD2
3 PC5 GPIO
4 PC6 GPIO
5 PC11 GPIO
6 PC22 GPIO
7 PC23 TIOA3 EXT1
8 PC24 TIOB3 EXT1
9 PA25 GPIO EXT1
10 PC12 AD12
11 - - VCC
12 - - GND
Table 4-6. SPARE SIGNALS header 3
Pin on header SAM4N pin Function Shared functionality
1 PC13 AD10
2 PC15 AD11
3 PA2 DATRG
4 PB13 DAC0
5 - - VCC
6 - - GND
4.2 Peripherals
4.2.1 Crystals
The SAM4N Xplained Pro kit contains two crystals that can be used as clock sources for the SAM4N device.
Each crystal has a cut-strap next to it that can be used to measure the oscillator safety factor. This is done by
cutting the strap and adding a resistor across the strap. More information about oscillator allowance and safety
factor can be found in appnote AVR4100
1
. Calculations for the selected crystal can be found in the schematics
documentation
2
of the board.
Table 4-7. External 32.768kHz crystals
Pin on SAM4N Function
PA7 XIN32
1
http://www.atmel.com/images/doc8333.pdf
2
http://www.atmel.com/Images/Atmel-42104-SAM4N-Xplained-Pro_User-Guide.zip