---
title: "W5500 - How to read DIPR register"
url: "https://maker.wiznet.io/forum/13189"
markdown_url: "https://maker.wiznet.io/forum/13189/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "Member 007"
created: "2019-01-31T19:50:03+09:00"
last_activity: "2019-02-07T23:51:37+09:00"
language: "en"
views: 517
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# W5500 - How to read DIPR register

## Question

Asked by Member 007 on 2019-01-31 in Ethernet Chips.

Hi,

What is the correct procedure to read back the DIPR address in Sn_DIPR register? When you read the DIPR register it always returns 0x00. We need to read the register for verification purposes.

Thank you.

## Replies

### Reply 1 by becky, 2019-02-07

Hello,

Sn_DIPR register does not have the same write and read values.
In TCP communication, the address of destination is read, and udp communication does not guarantee the value.

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Source: https://maker.wiznet.io/forum/13189