#Arietta pinout

This is the default pinout of Arietta G25 when you use the latest default image available in
the [image repository](/download_arietta).

It is possible to change it by using the <a href="http://linux.tanzilli.com" target="_blank">Device tree compiler and dynamic Arietta G25 pinout page</a>

<img src="./arietta_default_pinout.jpg"/>


## Debug port

This port is designed to be used with the 

* [Debug Port Interface](/DPI) or
* [USB to serial converter](/USB-3V-SER)

to have access to the debug messages sent by the Atmel MPU at startup (RomBOOT), 
during AT91Bootstrap second level boot loader and the Linux Kernel bootstrap.

From this port is is possible to Login directly to the Linux console
using a simple serial terminal emulator on your PC.

<table class="noborder" markdown="1">
<tr>
<td valign="top">
<img src="./arietta_dp_port.jpg"/>
</td>
<td valign="top">

| Pin # | Signal        | Dir | Description                                           |
|-------|---------------|-----|-------------------------------------------------------|
|  DP.1 | 3V3 power out | OUT | Output from the internal regulator from 5 to 3.3 volt |
|  DP.2 | EN5V input    | INP | If low turn off internal regulator from 5 to 3.3 volt |
|  DP.3 | DTXD          | OUT | Debug port serial output at 115200,N,8,1 3V3 level    |
|  DP.4 | DRXD          | INP | Debug port serial input                               |
|  DP.5 | WKUP          | INP | Atmel MPU wakeup signal                               |
|  DP.6 | GND           |     | Signal ground                                         |

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

<img src="./usb_serial.jpg"/>

## WiFi module placement

This port is designed to place this [WiFi module](/WIFI-2). <br/>
To know hot to configure it: @article='arietta_wifi'

<table class="noborder" markdown="1">
<tr>
<td valign="top">
<img src="./arietta_wifi_port.jpg"/>
</td>
<td valign="top">

| Pin # | Signal        | Dir | Description                                           |
|-------|---------------|-----|-------------------------------------------------------|
|  7    | WPS           | OUT | WSP function. Low level activated. Wired to PC16 |
|  6    | LED    	    | N.C.| WiFi module activity led. Not used |
|  5    | GND           |     | Signal ground GND |
|  4    | USB B D+      |     | USB Host B D+ |
|  3    | USB B D-      |     | USB Host B D- |
|  2    | VCC 3.3V DC   | OUT | Output from the internal regulator from 5 to 3.3 volt |
|  1    | WiFi TXEN     | OUT | RF on/off control. Low level activated to off. Wired to PC30 |



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

##Schematic

To know more about how are routed each signal inside the Arietta board 
please take a look to the [Arietta schematic](http://terzo.acmesystems.it/download/schematics/schematic_arietta.pdf).