#Aria G25 pinout

* __Pin #__ AriaG25 pin name
* __IC Pin__ Atmel pin name 
* __Primary__ Line functions assigned by default at reset
* __Alt__ Alternative function that can be set changing the device tree binding
* __ID 2.6.x__ Kernel 2.6.x ID using [sysfs gpio interface](https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/Documentation/gpio/gpio.txt)
* __ID 3.11.x__ Kernel 3.11.x ID using [sysfs gpio interface](https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/Documentation/gpio/gpio.txt)
* __Note__ Any notes about the pin
* __Reset state__ Line state at CPU reset 
  * __PIO__ indicates whether the PIO Line resets in I/O mode
  * __A__  indicates whether the peripheral A mode
  * __I/O__ Indicates whether the signal is input or output state.
  * __PU/PD__ Indicates whether Pull-Up, Pull-Down or nothing is enabled.
  * __ST__  Indicates if Schmitt Trigger is enabled.

The PIO lines called PAx, PBx and PCx can be configured
in up to four different ways. Please refer to  the 
[ATSAM9G25 datasheet](http://www.atmel.com/devices/SAM9G25.aspx)
to have a complete reference.

Be careful to check whether the line reset state is compatible with your
application board because it is changed to the Linux default config during 
the bootstrap after at least 500 ms. 

Be also careful to not leave tracks or vias not covered by solder under the Aria board, since there are testing pads on the Aria bottom.
 
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| Pin # | IC Pin | Primary | Alt | ID 2.6x | ID 3.1x | Note | Reset state |
|-|-|-|-|-|-|-|-|
| N1  |      | 3V3    |     |        |        | Power In Vcc | 
| N2  | PC0  | GPIO   | SDA1  | 96 | 64 | I2C bus 1 Data or GPIO  | PIO,I,PU,ST |
| N3  | PC1  | GPIO   | SCL1  | 97 | 65 | I2C bus 1 Clock or GPIO | PIO,I,PU,ST |
| N4  | PC2  | GPIO   | TIOA3 | 98 | 66 | GPIO or TC block PWM0   | PIO,I,PU,ST |
| N5  | PC3  | GPIO   | TIOB3 | 99 | 67 | GPIO or TC block PWM1   | PIO,I,PU,ST |
| N6  | PC4  | GPIO   |       |100 | 68 |                         | PIO,I,PU,ST |
| N7  | PC5  | GPIO   | TIOA4 |101 | 69 | GPIO or TC block PWM2   | PIO,I,PU,ST |
| N8  | PC6  | GPIO   | TIOB4 |102 | 70 | GPIO or TC block PWM3   | PIO,I,PU,ST |
| N9  | PC7  | GPIO   |       | 103 | 71 | | PIO,I,PU,ST |
| N10 | PC8  | GPIO   | UTXD0 | 104 | 72 | | PIO,I,PU,ST |
| N11 | PC9  | GPIO   | URXD0 | 105 | 73 | | PIO,I,PU,ST |
| N12 | PC10 | GPIO   |       | 106 | 74 | | PIO,I,PU,ST |
| N13 | PC11 | GPIO   |       | 107 | 75 | | PIO,I,PU,ST |
| N14 | PC12 | GPIO   | TIOA5 | 108 | 76 | GPIO or TC block PWM4 | PIO,I,PU,ST |
| N15 | PC13 | GPIO   | TIOB5 | 109 | 77 | GPIO or TC block PWM5 | PIO,I,PU,ST |
| N16 | PC14 | GPIO   |     | 110 | 78 | | PIO,I,PU,ST |
| N17 | PC15 | GPIO   |     | 111 | 79 | | PIO,I,PU,ST |
| N18 | PC16 | GPIO   | UTXD1 | 112 | 80 | | PIO,I,PU,ST |
| N19 | PC17 | GPIO   | URXD1 | 113 | 81 | | PIO,I,PU,ST |
| N20 | PC18 | GPIO   | PWM0  | 114 | 82 | GPIO or Pulse Width Modulation Out 0 | PIO,I,PU,ST |
| N21 | PC19 | GPIO   | PWM1  | 115 | 83 | GPIO or Pulse Width Modulation Out 1 | PIO,I,PU,ST |
| N22 | PC20 | GPIO   | PWM2  | 116 | 84 | GPIO or Pulse Width Modulation Out 2 | PIO,I,PU,ST |
| N23 | PC21 | GPIO   | PWM3  | 117 | 85 | GPIO or Pulse Width Modulation Out 3 | PIO,I,PU,ST |
| N24 |      | GND    |       |     | | Power In GND |

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| Pin # | IC Pin | Primary | Alt | ID 2.6x | ID 3.1x | Note | Reset state |
|-|-|-|-|-|-|-|-|
| E1     |       | GND  |      |     | | Power In GND              |
| E2     | PC22  | TXD3 | GPIO | 118 | 86 | Serial line <b>/dev/ttyS4 TXD</b> or GPIO | PIO,I,PU,ST | 
| E3     | PC23  | RXD3 | GPIO | 119 | 87 | Serial line <b>/dev/ttyS4 RXD</b> or GPIO | PIO,I,PU,ST |
| E4     | PC24  | RTS3 | GPIO | 120 | 88 | Serial line <b>/dev/ttyS4 RTS</b> or GPIO | PIO,I,PU,ST |
| E5     | PC25  | CTS3 | GPIO | 121 | 89 | Serial line <b>/dev/ttyS4 CTS</b> or GPIO | PIO,I,PU,ST |
| E6     | PC26  | GPIO | | 122 | 90 | |  PIO,I,PU,ST |
| E7     | PC27  | RTS1 | GPIO | 123 | 91 | Serial line <b>/dev/ttyS2 RTS</b> or GPIO | PIO,I,PU,ST |
| E8     | PC28  | CTS1 | GPIO | 124 | 92 | Serial line <b>/dev/ttyS2 CTS</b> or GPIO | PIO,I,PU,ST |
| E9     | PC29  | GPIO | | 125 | 93 | | PIO,I,PU,ST |
| E10    | PC30  | GPIO | | 126 | 94 | | PIO,I,PU,ST |
| E11    | PC31  | GPIO | | 127 | 95 | | PIO,I,PU,ST |
| E12    | USBCP | D+   | | | | USB 2.0 Host full-speed port C | 
| E13    | USBCN | D-   | | | | USB 2.0 Host full-speed port C |
| E14    |       | GND  | | | | Power In GND |
| E15    | USBBN | D-   | | | | USB 2.0 Host hi-speed port B | 
| E16    | USBBP | D+   | | | | USB 2.0 Host hi-speed port B | 
| E17    |       | GND  | | | | Power In GND |
| E18    | USBAN | D-   | | | | USB 2.0 Host/Device hi-speed port A|
| E19    | USBAP | D+   | | | | USB 2.0 Host/Device hi-speed port A |
| E20    | VBAT  |      | | | | RTC battery backup +3 volt DC input |
| E21    | NRST  |      | | | | Reset input signal (active low) |
| E22    | SHDN  |      | | | | Shutdown output signal (active low)|
| E23    | WKUP  |      | | | | Wake-up input signal (active low) |
| E24    |       | 3V3  | | | | Power In Vcc |

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| Pin # | IC Pin | Primary | Peripheral A | ID 2.6x | ID 3.1x | Note | Reset state |
|-|-|-|-|-|-|-|-|
| S1     |      | 3V3   |      |        |        | Power In Vcc |
| S2     | PA21 | 1W    | GPIO | 53 | 21 | Bit banging 1-wire bus or GPIO | PIO,I,PU,ST |
| S3     | PA20 | DA3   | | 52 | 20 | microSD Card memory | PIO,I,PU,ST |
| S4     | PA19 | DA2   | | 51 | 19 | microSD Card memory | PIO,I,PU,ST |
| S5     | PA18 | DA1   | | 50 | 18 | microSD Card memory | PIO,I,PU,ST |
| S6     | PA17 | CK    | | 49 | 17 | microSD Card memory | PIO,I,PU,ST |
| S7     | PA16 | CDA   | | 48 | 16 | microSD Card memory | PIO,I,PU,ST |
| S8     | PA15 | DA0   | | 47 | 15 | microSD Card memory | PIO,I,PU,ST |
| S9     | PA14 | NPCS0 | GPIO | 46 | 14 | SPI bus 0 chip select 0 or GPIO| PIO,I,PU,ST |
| S10    | PA13 | SPCK  | GPIO | 45 | 13 | SPI bus 0 clock or GPIO| PIO,I,PU,ST |
| S11    | PA12 | MOSI  | GPIO | 44 | 12 | SPI bus 0 Master Output or GPIO| PIO,I,PU,ST |
| S12    | PA11 | MISO  | GPIO | 43 | 11 | SPI bus 0 Master Input or GPIO| PIO,I,PU,ST |
| S13    | PA10 | DTXD | | 42 | 10 | Debug serial port | PIO,I,PU,ST |
| S14    | PA9  | DRXD | | 41 |  9 | Debug serial port  | PIO,I,PU,ST |
| S15    | PA8  | RXD2 | GPIO | 40 | 8 | Serial line <b>/dev/ttyS3 RXD</b> or GPIO| PIO,I,PU,ST |
| S16    | PA7  | TXD2 | GPIO | 39 | 7 | Serial line <b>/dev/ttyS3 TXD</b> or GPIO| PIO,I,PU,ST |
| S17    | PA6  | RXD1 | GPIO | 38 | 6 | Serial line <b>/dev/ttyS2 RXD</b> or GPIO| PIO,I,PU,ST |
| S18    | PA5  | TXD1 | GPIO | 37 | 5 | Serial line <b>/dev/ttyS2 TXD</b> or GPIO| PIO,I,PU,ST |
| S19    | PA4  | GPIO |      | 36 | 4 | |  PIO,I,PU,ST |
| S20    | PA3  | CTS0 | GPIO | 35 | 3 | Serial line <b>/dev/ttyS1 CTS</b> or GPIO| PIO,I,PU,ST |
| S21    | PA2  | RTS0 | GPIO | 34 | 2 | Serial line <b>/dev/ttyS1 RTS</b> or GPIO| PIO,I,PU,ST |
| S22    | PA1  | RXD0 | GPIO | 33 | 1 | Serial line <b>/dev/ttyS1 RXD</b> or GPIO| PIO,I,PU,ST |
| S23    | PA0  | TXD0 | GPIO | 32 | 0 | Serial line <b>/dev/ttyS1 TXD</b> or GPIO| PIO,I,PU,ST |
| S24    |      | GND | | | | Power In GND |

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| Pin # | IC Pin | Default | Alt | ID 2.6x | ID 3.1x | Note | Reset state |
|-|-|-|-|-|-|-|-|
| W1     |      | GND | | | | Power In GND |
| W2     |      | ETHRXP | | | | Eth RX+ |
| W3     |      | ETHRXN | | | | Eth RX- |
| W4     |      | ETHTXP | | | | Eth TX+ |
| W5     |      | ETHTXN| | | | Eth TX- |
| W6     |      | ETH3V3| | | | Eth 3V3  |
| W7     |      | ETHLED1| | | | Eth Yellow led (traffic)|
| W8     |      | ETHLED2| | | | Eth Green led (link) |
| W9     | PA22 | GPIO | | 54 | 22 | | PIO,I,PU,ST |
| W10    | PA23 | GPIO | | 55 | 23 | | PIO,I,PU,ST |
| W11    | PA24 | GPIO | TK | 56 | 24 | | PIO,I,PU,ST |
| W12    | PA25 | GPIO | TF | 57 | 25 | | PIO,I,PU,ST |
| W13    | PA26 | GPIO | TD | 58 | 26 | | PIO,I,PU,ST |
| W14    | PA27 | GPIO | RD | 59 | 27 | | PIO,I,PU,ST |
| W15    | PA28 | GPIO | RK | 60 | 28 | | PIO,I,PU,ST |
| W16    | PA29 | GPIO | RF | 61 | 29 | | PIO,I,PU,ST |
| W17    | PA30 | SDA0 | GPIO | 62 | 30 | I2C bus 0 Data  or GPIO| PIO,I,PU,ST |
| W18    | PA31 | SCL0 | GPIO | 63 | 31 | I2C bus 0 Clock  or GPIO| PIO,I,PU,ST |
| W19    | ADVREF |    |      |    | | A/D converter voltage reference In (max 3.3 volt) |
| W20    | PB11 | AD0 | GPIO | 75 | 43 | A/D converter Input 0  or GPIO | PIO,I,PU,ST |
| W21    | PB12 | AD1 | GPIO | 76 | 44 | A/D converter Input 1  or GPIO | PIO,I,PU,ST |
| W22    | PB13 | AD2 | GPIO | 77 | 45 | A/D converter Input 2  or GPIO | PIO,I,PU,ST |
| W23    | PB14 | AD3 | GPIO | 78 | 46 | A/D converter Input 3  or GPIO | PIO,I,PU,ST |
| W24    |      | 3V3 |      |    | | Power In Vcc |

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