> For the complete documentation index, see [llms.txt](https://bananapi.gitbook.io/banana-pi-bpi-w2-with-realtec-rtd1296/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bananapi.gitbook.io/banana-pi-bpi-w2-with-realtec-rtd1296/chapter1/bpi-w2-rgmii-interface.md).

# BPI-W2 RGMII Interface

**BPI-W2 RGMII Interface with PIN define:**

![](https://2066668521-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M2HWtQqFLHQ4kO9KdDh%2F-M2HWv4olH00tP0BZDBQ%2F-M2HXIZFzPHZvIvKjECc%2Frgmii%20\(2\).png?generation=1584080180963279\&alt=media)

3.3 voltage domain is RGMII.

![](https://2066668521-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M2HWtQqFLHQ4kO9KdDh%2F-M2HWv4olH00tP0BZDBQ%2F-M2HXIZHadZ4SfK9Kv-q%2FRGMII%20V.png?generation=1584080180888760\&alt=media)

So ,you can use this PIN do many expansion board.