#Acqua A5 pinout

* __Pin #__ Acqua A5 pin name
* __IC Pin__ Microchip pin name
* __Default__ Line functions assigned by default by our Linux distribution
* __Alt__ Alternative line functions that can be set changing the device 
tree binding
* __KID__ Kernel ID using [sysfs gpio interface](https://www.kernel.org/doc/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, PCx, PDx and PEx can be configured
in up to four different ways. Please refer to  the 
[SAMA5D3 datasheet](http://www.microchip.com/wwwproducts/en/ATSAMA5D31)
at page 11 to have a complete reference.

Be carefull 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. 


<table width="100%" markdown="1">
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<td width="15%" valign="top">
<img width="320px" src="./acqua_pinout_J1.jpg" />
</td>
<td>

| Pin # | IC Pin   | Default   | Alt       | Alt  |KID  | Note | Reset state |
|-------|----------|-----------|-----------|------|-----|------|-------------|
| J1.1  | ETH_TXP  |           |           |      |     |      |             |
| J1.2  | ETH_RXN  |           |           |      |     |      |             |
| J1.3  | ETH_TXN  |           |           |      |     |      |             |
| J1.4  | ETH_RXP  |           |           |      |     |      |             |
| J1.5  | ETH_GND  |           |           |      |     |      |             |
| J1.6  | ETH_3V3  |           |           |      |     |      |             |
| J1.7  | ETH_LED1 |           |           |      |     | Link        |      |
| J1.8  | ETH_LED2 |           |           |      |     | Traffic     |      |
| J1.9  | PA1      | LCD DAT1  | GPIO      |      |   1 | | PIO,I,PU,ST |
| J1.10 | PA0      | LCD DAT0  | GPIO      |      |   0 | | PIO,I,PU,ST |
| J1.11 | PA3      | LCD DAT3  | GPIO      |      |   3 | | PIO,I,PU,ST |
| J1.12 | PA2      | LCD DAT2  | GPIO      |      |   2 | | PIO,I,PU,ST |
| J1.13 | PA5      | LCD DAT5  | GPIO      |      |   5 | | PIO,I,PU,ST |
| J1.14 | PA4      | LCD DAT4  | GPIO      |      |   4 | | PIO,I,PU,ST |
| J1.15 | PA7      | LCD DAT7  | GPIO      |      |   7 | | PIO,I,PU,ST |
| J1.16 | PA6      | LCD DAT6  | GPIO      |      |   6 | | PIO,I,PU,ST |
| J1.17 | PA9      | LCD DAT9  | GPIO      |      |   9 | | PIO,I,PU,ST |
| J1.18 | PA8      | LCD DAT8  | GPIO      |      |   8 | | PIO,I,PU,ST |
| J1.19 | PA11     | LCD DAT11 | GPIO      |      |  11 | | PIO,I,PU,ST |
| J1.20 | PA10     | LCD DAT10 | GPIO      |      |  10 | | PIO,I,PU,ST |
| J1.21 | PA13     | LCD DAT13 | GPIO      |      |  13 | | PIO,I,PU,ST |
| J1.22 | PA12     | LCD DAT12 | GPIO      |      |  12 | | PIO,I,PU,ST |
| J1.23 | PA15     | LCD DAT15 | GPIO      |      |  15 | | PIO,I,PU,ST |
| J1.24 | PA14     | LCD DAT14 | GPIO      |      |  14 | | PIO,I,PU,ST |
| J1.25 | PC13     | LCD DAT17 | MCI2_DA2  |TIOB1 |  77 | | PIO,I,PU,ST |
| J1.26 | PC14     | LCD DAT16 | MCI2_DA3  |TCLK1 |  78 | | PIO,I,PU,ST |
| J1.27 | PC11     | LCD DAT19 | MCI2_DA0  |      |  75 | | PIO,I,PU,ST |
| J1.28 | PC12     | LCD DAT18 | MCI2_DA1  |TIOA1 |  76 | | PIO,I,PU,ST |
| J1.29 | PC15     | LCD DAT21 | MCI2_CK   |PCK2  |  79 | | PIO,I,PU,ST |
| J1.30 | PC10     | LCD DAT20 | MCI2_CDA  |      |  74 | | PIO,I,PU,ST |
| J1.31 | PE28     | LCD DAT23 | GPIO      |TIOB2 | 156 | | PIO,I,PU,ST |
| J1.32 | PE27     | LCD DAT22 | GPIO      |TIOA2 | 155 | | PIO,I,PU,ST |
| J1.33 | PA25     | LCD DISP  | GPIO      |      |  25 | | PIO,I,PU,ST |
| J1.34 | GND      |           |           |      |     | |             |
| J1.35 | PA27     | LCD HSYNC | GPIO      |      |  27 | | PIO,I,PU,ST |
| J1.36 | PA28     | LCD PCK   | GPIO      |      |  28 | | PIO,I,PU,ST |
| J1.37 | PA29     | LCD DEN   | GPIO      |      |  29 | | PIO,I,PU,ST |
| J1.38 | PA26     | LCD VSYNC | GPIO      |      |  26 | | PIO,I,PU,ST |
| J1.39 | PA24     | LCD PWM   | GPIO      |      |  24 | | PIO,I,PU,ST |
| J1.40 | PD20     | AD0       | GPIO      |      | 116 | | PIO,I,PU,ST |
| J1.41 | PD21     | AD1       | GPIO      |      | 117 | | PIO,I,PU,ST |
| J1.42 | PD22     | AD2       | GPIO      |      | 118 | | PIO,I,PU,ST |
| J1.43 | PD23     | AD3       | GPIO      |      | 119 | | PIO,I,PU,ST |
| J1.44 | PD24     | AD4       | GPIO      |      | 120 | | PIO,I,PU,ST |
| J1.45 | PD25     | AD5       | GPIO      |      | 121 | | PIO,I,PU,ST |
| J1.46 | PD26     | AD6       | GPIO      |      | 122 | | PIO,I,PU,ST |
| J1.47 | PD27     | AD7       | GPIO      |      | 123 | | PIO,I,PU,ST |
| J1.48 | PD28     | AD8       | GPIO      |      | 124 | | PIO,I,PU,ST |
| J1.49 | PD29     | AD9       | GPIO      |      | 125 | | PIO,I,PU,ST |
| J1.50 |          | ADVREF    |           |      |     | | |

</td>
</tr>
</table>

<br>

<table width="100%" markdown="1">
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<td width="15%" valign="top">
<img width="320px" src="./acqua_pinout_J2.jpg" />
</td>
<td>

| Pin # | IC Pin   | Default    | Alt  | Alt  | KID | Note | Reset state |
|-|-|-|-|-|-|-|-|-|
| J2.1  | PD31    | AD11        | GPIO       | | 127 | | PIO,I,PU,ST |
| J2.2  | PD30    | AD10        | GPIO       | | 126 | | PIO,I,PU,ST |
| J2.3  | PD19    | A/D TRIGGER | GPIO       | | 115 | | PIO,I,PU,ST |
| J2.4  | GND     |             |            | |     | |             |
| J2.5  | PD13    | SPI0_NCS0   | GPIO       | | 109 | | PIO,I,PU,ST |
| J2.6  | PD12    | SPI0_CK     | GPIO       | | 108 | | PIO,I,PU,ST |
| J2.7  | PD11    | SPI0_MOSI   | GPIO       | |107 | | PIO,I,PU,ST |
| J2.8  | PD10    | SPI0_MISO   | GPIO       | |106 | | PIO,I,PU,ST |
| J2.9  | PD15    | CTS0 (/dev/ttyS1)        | SPI0_NCS2  | |111 | | PIO,I,PU,ST |
| J2.10 | PD14    | SPI0_NCS1   | GPIO       | |110 | | PIO,I,PU,ST |
| J2.11 | PD17    | RXD0 (/dev/ttyS1)        | GPIO       | |113 | | PIO,I,PU,ST |
| J2.12 | PD16    | RTS0 (/dev/ttyS1)        | SPI0_NCS3  | |112 | | PIO,I,PU,ST |
| J2.13 | PB2     | GPIO        | SSC_TK1    | |34  | | PIO,I,PU,ST |
| J2.14 | PD18    | TXD0 (/dev/ttyS1)        | GPIO       | |114 | | PIO,I,PU,ST |
| J2.15 | PB6     | GPIO        | SSC_TD1    | |38  | | PIO,I,PU,ST |
| J2.16 | PB3     | GPIO        | SSC_TF1    | |35  | | PIO,I,PU,ST |
| J2.17 | PB7     | GPIO        | SSC_RK1    | |39  | | PIO,I,PU,ST |
| J2.18 | PB11    | GPIO        | SSC_RD1    | |43  | | PIO,I,PU,ST |
| J2.19 | PB10    | GPIO        | SSC_RF1    | |42  | | PIO,I,PU,ST |
| J2.20 | USBA_P  |             |            | |    | | USB A|
| J2.21 | 3V3     |             |            | |    | |  |
| J2.22 | USBA_N  |             |            | |    | | USB A|
| J2.23 | PB4     | GPIO        | PWMH1      | |36  | | PIO,I,PU,ST |
| J2.24 | USBB_P  |             |            | |    | | USB B |
| J2.25 | PB5     | GPIO        | PWML1      | |37  | | PIO,I,PU,ST |
| J2.26 | USBB_N  |             |            | |    | | USB B |
| J2.27 | GND     |             |            | |    | |  |
| J2.28 | USBC_P  |             |            | |    | | USB C |
| J2.29 | PB0     | GPIO        | PWMH0      | |32  | | PIO,I,PU,ST |
| J2.30 | USBC_N  |             |            | |    | | USB C |
| J2.31 | PB1     | GPIO        | PWML0      | |33  | | PIO,I,PU,ST |
| J2.32 | PB14    | GPIO        |            | |46  | | PIO,I,PU,ST |
| J2.33 | PB8     | GPIO        | PWMH2      | |40  | | PIO,I,PU,ST |
| J2.34 | PB15    | GPIO        |            | |47  | | PIO,I,PU,ST |
| J2.35 | PB9     | GPIO        | PWML2      | |41  | | PIO,I,PU,ST |
| J2.36 | PB16    | GPIO        |            | |48  | | PIO,I,PU,ST |
| J2.37 | PB12    | GPIO        | PWMH3      | |44  | | PIO,I,PU,ST |
| J2.38 | PB17    | GPIO        |            | |49  | | PIO,I,PU,ST |
| J2.39 | PB13    | GPIO        | PWML3      | |45  | | PIO,I,PU,ST |
| J2.40 | PB18    | GPIO        |            | |50  | | PIO,I,PU,ST |
| J2.41 | GND     |             |            | |    | | PIO,I,PU,ST |
| J2.42 | PB27    | RTS1 (/dev/ttyS2)        | GPIO       | |59  | | PIO,I,PU,ST |
| J2.43 | PB26    | CTS1 (/dev/ttyS2)        | GPIO       | |58  | | PIO,I,PU,ST |
| J2.44 | PB25    | GPIO        |            | |57  | | PIO,I,PU,ST |
| J2.45 | PB28    | RXD1 (/dev/ttyS2)       | GPIO       | |60  | | PIO,I,PU,ST |
| J2.46 | PB29    | TXD1 (/dev/ttyS2)        | GPIO       | |61  | | PIO,I,PU,ST |
| J2.47 | WKUP    |             |            | |    | Read below | |
| J2.48 | SHDN    |             |            | |    | Read below | |
| J2.49 | POWER_EN|             |            | |    | Read below | |
| J2.50 | NRST    |             |            | |    | Read below | |

</td>
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</table>

<br>


* __WKUP__ is a means to wake up the CPU from the shutdown state before the programmed time on a 
programmable (rise, fall or both ) external event. If not used can be left disconnected.
* __SHDN__: it is the SHDN pin of the A5 CPU. If instructed to do so, the CPU will lower this signal 
to disable an external 3.3V power regulator powering the Acqua board. It will work only if you supply 
a battery backup voltage between 2V and 3V on the VBAT pin. In this way you can shutdown completely 
the power for the Acqua board (power consumption 0) and wake it up after some time. If not used can be left disconnected.
* __POWER_EN__: disables some of the internal regulators for factory internal tests. Left it unconnected.
* __NRST__ is a bidirectional external RESET for the CPU. It means you can reset the A5 CPU 
from outside but also use the power supervisor inside the Acqua board to reset external chips. 
The power supervisor onboard will wait for the power to be stabilized for 140ms before raising the NRST line.  
If not used can be left disconnected.


<table width="100%" markdown="1">
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<td width="15%" valign="top">
<img width="320px" src="./acqua_pinout_J3.jpg" />
</td>
<td>

| Pin # | IC Pin   | Default   | Alt  | Alt | KID | Note | Reset state |
|-|-|-|-|-|-|-|-|-|
| J3.1  | BOOT_OFF|            |           | |     | Read below | PIO,I,PU,ST |
| J3.2  | VBAT    |            |           | |     | Read below | PIO,I,PU,ST |
| J3.3  | PB30    | DRXD       |           | |     | Debug port | PIO,I,PU,ST |
| J3.4  | PB31    | DTXD       |           | |     | Debug port | PIO,I,PU,ST |
| J3.5  | PE17    | RTS3 (/dev/ttyS4)      | GPIO      | | 145 | | A,I,PD,ST |
| J3.6  | PE16    | CTS3 (/dev/ttyS4)       | GPIO      | | 144 | | A,I,PD,ST |
| J3.7  | PE19    | TXD3 (/dev/ttyS4)       | GPIO      | | 147 | | A,I,PD,ST |
| J3.8  | PE18    | RXD3 (/dev/ttyS4)       | GPIO      | | 146 | | A,I,PD,ST |
| J3.9  | PE15    | GPIO       |           | | 143 | | A,I,PD,ST |
| J3.10 | PE23    | CTS2 (/dev/ttyS3)      | GPIO      | | 151 | | A,I,PD,ST |
| J3.11 | PE24    | RTS2 (/dev/ttyS3)      | GPIO      | | 152 | | A,I,PD,ST |
| J3.12 | PE25    | RXD2 (/dev/ttyS3)       | GPIO      | | 153 | | A,I,PD,ST |
| J3.13 | PE26    | TXD2 (/dev/ttyS3)       | GPIO      | | 155 | | A,I,PD,ST |
| J3.14 | PE20    | GPIO       |           | | 148 | | A,I,PD,ST |
| J3.15 | PB22    | GPIO       | MCI1_DA2  | |  54 | | PIO,I,PU,ST |
| J3.16 | PB23    | GPIO       | MCI1_DA3  | |  55 | | PIO,I,PU,ST |
| J3.17 | PB19    | GPIO       | MCI1_CDA  | |  51 | | PIO,I,PU,ST |
| J3.18 | PB21    | GPIO       | MCI1_DA1  | |  53 | | PIO,I,PU,ST |
| J3.19 | PB24    | GPIO       | MCI1_CK   | |  56 | | PIO,I,PU,ST |
| J3.20 | PB20    | GPIO       | MCI1_DA0  | |  52 | | PIO,I,PU,ST |
| J3.21 | 3V3     |            |           | |     | | PIO,I,PU,ST |
| J3.22 | PC23    | GPIO       | SPI1_MOSI | |  87 | | PIO,I,PU,ST |
| J3.23 | PC25    | GPIO       | SPI1_NCS0 | |  89 | | PIO,I,PU,ST |
| J3.24 | PC22    | GPIO       | SPI1_MISO | |  86 | | PIO,I,PU,ST |
| J3.25 | PC24    | GPIO       | SPI1_SPCK | |  88 | | PIO,I,PU,ST |
| J3.26 | PC26    | GPIO       | SPI1_NCS1 | TWD1 |  90 | | PIO,I,PU,ST |
| J3.27 | GND     |            |           | |     | | PIO,I,PU,ST |
| J3.28 | PC27    | GPIO       | SPI1_NCS2 | TWCK1 |  91 | | PIO,I,PU,ST |
| J3.29 | PC28    | GPIO       | SPI1_NCS3 | |  92 | | PIO,I,PU,ST |
| J3.30 | PC30    | GPIO      | UTXD0 (/dev/ttyS5)     | |  94 | | PIO,I,PU,ST |
| J3.31 | PC29    | GPIO      | URXD0 (/dev/ttyS5)   | |  93 | | PIO,I,PU,ST |
| J3.32 | PC31    | GPIO       |           | |  95 | | PIO,I,PU,ST |
| J3.33 | PA17    | GPIO       |           | |  17 | | PIO,I,PU,ST |
| J3.34 | PA16    | GPIO       |           | |  16 | | PIO,I,PU,ST |
| J3.35 | PA19    | GPIO       |           | TXCK2 |  19 | | PIO,I,PU,ST |
| J3.36 | PA18    | GPIO       |           | TWD2  |  18 | | PIO,I,PU,ST |
| J3.37 | PA21    | GPIO       |           | |  21 | | PIO,I,PU,ST |
| J3.38 | PA20    | GPIO       |           | |  20 | | PIO,I,PU,ST |
| J3.39 | PA23    | GPIO       |           | |  23 | | PIO,I,PU,ST |
| J3.40 | PA22    | GPIO       |           | |  22 | | PIO,I,PU,ST |
| J3.41 | PA31    | TWCK0      | GPIO      | UTXD1 (/dev/ttyS6)  |  31 | | PIO,I,PU,ST |
| J3.42 | PA30    | TWD0       | GPIO      | URXD1 (/dev/ttyS6)  |  30 | | PIO,I,PU,ST |
| J3.43 | PE31    | GPIO       |           | | 159 | | PIO,I,PD,ST |
| J3.44 | PE29    | GPIO       |           | | 157 | | PIO,I,PD,ST |
| J3.45 | PC16    | SSC_TK0    | GPIO      | |  80 | | PIO,I,PU,ST |
| J3.46 | PC17    | SSC_TF0    | GPIO      | |  81 | | PIO,I,PU,ST |
| J3.47 | PC18    | SSC_TD0    | GPIO      | |  82 | | PIO,I,PU,ST |
| J3.48 | PC19    | SSC_RK0    | GPIO      | |  83 | | PIO,I,PU,ST |
| J3.49 | PC20    | SSC_RF0    | GPIO      | |  84 | | PIO,I,PU,ST |
| J3.50 | PC21    | SSC_RD0    | GPIO      | |  85 | | PIO,I,PU,ST |

</td>
</tr>
</table>

## JTag signals

<img src="./acqua_jtag_signal.png">

* [Microchip MPU SAMA5D31 datasheet](http://www.microchip.com/wwwproducts/en/ATSAMA5D31)

<br>

* __BOOT_OFF__: keeping this line low at startup will disable the boot of the NAND FLASH chip, 
in order to be able to re-program it with the Microchip tool SAM-BA. If not used can be left disconnected.
* __VBAT__: if you need the internal RTC working you have to connect a backup battery here, also to enable 
the timed wakeup as explained above. If not used can be left disconnected.