---
title: "Clear W5500 chip"
url: "https://maker.wiznet.io/forum/11890"
markdown_url: "https://maker.wiznet.io/forum/11890/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "Dimon49773"
created: "2016-05-24T08:21:12+09:00"
last_activity: "2017-05-04T08:38:55+09:00"
language: "en"
views: 511
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Clear W5500 chip

## Question

Asked by Dimon49773 on 2016-05-24 in Ethernet Chips.

Hello everybody,

I have a trivial question: How to clear every settings in the chip?

I’m receiving dhcp data and i would like to clear everything in the chip and then set him up.

## Replies

### Reply 1 by Candela12, 2016-05-24

An effective way would be to perform a hardware reset using the RSTn pin.
All registers turn into their default state with this action.

### Reply 2 by Coccoliso, 2016-05-24

Hi,
in case of DHCP lease you can change temporarily a mac byte to simulate a different device. Then operate on RST line and/or operate a MR Clear via software. In examples this is made in DHCP and DNS sources where set tx/rx buffers size.

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Source: https://maker.wiznet.io/forum/11890