> For the complete documentation index, see [llms.txt](https://auvidea.gitbook.io/p140/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://auvidea.gitbook.io/p140/manual/p140-overview.md).

# P140 Overview

<figure><img src="/files/Wee3nGoYfj83xVQroscI" alt=""><figcaption></figcaption></figure>

## Document versions and changes

<table><thead><tr><th width="126">Version</th><th>Changes</th></tr></thead><tbody><tr><td>1.0</td><td>Initial release</td></tr></tbody></table>

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## Product revisions and changes

<table><thead><tr><th width="168.5">Version</th><th>Changes</th></tr></thead><tbody><tr><td>38456-1</td><td>Initial design</td></tr><tr><td>38456-2.1</td><td>Change from I210 to RTL, known issues: missing power rail </td></tr><tr><td>38456-3</td><td>Fixed power rail bug</td></tr></tbody></table>

## What is the P140

The P140 is a adapterborad that provides an network interface with up to 4 RJ45/XCode connectors. The network interface is provided over a 1x PCIe interface from the host controller.

<figure><img src="/files/AfxXEm75IIVtv76o058R" alt=""><figcaption></figcaption></figure>

## I²C Devices

<table><thead><tr><th width="115.33333333333331">Address</th><th width="135">Part</th><th>Description</th></tr></thead><tbody><tr><td>0x20</td><td>TPS23861</td><td>PoE Controller</td></tr><tr><td>0x21</td><td>TCA6408</td><td>Gpio expander</td></tr><tr><td>0x54</td><td>PCA9685</td><td>LED Controller</td></tr></tbody></table>