---
title: "Wiznet 5500 (wiz850io): force to 10mbit"
url: "https://maker.wiznet.io/forum/13476"
markdown_url: "https://maker.wiznet.io/forum/13476/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "scardig"
created: "2019-09-10T04:31:58+09:00"
last_activity: "2019-09-10T07:45:00+09:00"
language: "en"
views: 468
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Wiznet 5500 (wiz850io): force to 10mbit

## Question

Asked by scardig on 2019-09-10 in Ethernet Chips.

I’m currently using a wiz850io module with WIZNET5K drivers and I need to force such board to 10mbit. I know it’s possible via a sw configuration: do you have a quick hint to the right setting in the source code ?

Tnx

## Replies

### Reply 1 by scardig, 2019-09-10

Hello,

myphyconf.speed should be PHY_SPEED_10 without the final M

```
myphyconf.speed = PHY_SPEED_10;
```

Tnx

---

Source: https://maker.wiznet.io/forum/13476