---
title: "Datasheet Page 67: Identification register"
url: "https://maker.wiznet.io/forum/11114"
markdown_url: "https://maker.wiznet.io/forum/11114/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "mrupprath"
created: "2015-06-13T09:45:30+09:00"
last_activity: "2017-05-04T08:35:57+09:00"
language: "en"
views: 453
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Datasheet Page 67: Identification register

## Question

Asked by mrupprath on 2015-06-13 in Ethernet Chips.

Dear all,
what is this register used for ?

Thank you

## Replies

### Reply 1 by Coccoliso, 2015-06-13

It is a register that always returns a word composed of high byte 0x53 and low byte 0x00 that is the type number of chip (0x5300 = W5300)
I understand that the brother W5500 has an identical register at 0x0039 location (that returns 0x55 0x00) and the W5200 at 0x001F location.
Since each chip has a different location find it of little use except to verify the correct reading of a known value register.

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Source: https://maker.wiznet.io/forum/11114