---
title: "What is 100BaseTx in mbps form ?"
url: "https://maker.wiznet.io/forum/14428"
markdown_url: "https://maker.wiznet.io/forum/14428/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "RectCream"
created: "2021-12-18T17:34:30+09:00"
last_activity: "2021-12-23T00:42:01+09:00"
language: "en"
views: 378
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# What is 100BaseTx in mbps form ?

## Question

Asked by RectCream on 2021-12-18 in Ethernet Chips.

Some said 100BT stands for 10mbps, some indicates the bit rate is 100mbps.
What is 100BaseTx stands for and how to convert to mbps form ?

## Replies

### Reply 1 by louis, 2021-12-23

Hi,
The WIZnet chip supports 100Base and 10Base modes. You can change the mode by controlling the register.

[![image](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/9/9c8857bd6d5fdc3ded5f40b894da0b976959ea66.png) image762×431 77.2 KB](https://maker.wiznet.io/forum_uploads/wiznet/original/2X/9/9c8857bd6d5fdc3ded5f40b894da0b976959ea66.png)

Thank you.

---

Source: https://maker.wiznet.io/forum/14428