---
title: "Meaning of SR register 10H"
url: "https://maker.wiznet.io/forum/14159"
markdown_url: "https://maker.wiznet.io/forum/14159/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "seibu-endo"
created: "2021-02-17T00:30:40+09:00"
last_activity: "2021-02-23T05:27:43+09:00"
language: "en"
views: 297
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Meaning of SR register 10H

## Question

Asked by seibu-endo on 2021-02-17 in Ethernet Chips.

When I read the SR register, it returns a value of 10H.
This is a value not listed in the data sheet, what does it mean?

Operating
environment CPU is RX65N
I/F with W5500 is SPI communication

## Replies

### Reply 1 by irina, 2021-02-22

This value is sending the SYN Packet
This status is abnormal and if the status is maintained, you have to send the close command.

### Reply 2 by seibu-endo, 2021-02-22

I understand.
Thank you

---

Source: https://maker.wiznet.io/forum/14159