---
title: "Help me ragrding w5500"
url: "https://maker.wiznet.io/forum/11145"
markdown_url: "https://maker.wiznet.io/forum/11145/md"
type: "Forum topic"
category: "IO Modules"
author: "vport"
created: "2015-07-02T07:42:20+09:00"
last_activity: "2017-05-04T08:36:25+09:00"
language: "en"
views: 916
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Help me ragrding w5500

## Question

Asked by vport on 2015-07-02 in IO Modules.

I am using wiznet w500 io module purchased from ebay . I am interfacing with arduiono atmega2560 . WHEN I CONNECT THE MODULE windows xp show connected and both led are ok and also one of led start blinking but stop blinking after some time it stop blinking . ping is not working is module is damged or some thing esle as arduiono code show sever at 0.0.0.0 i am using latestes arduion libary.
my connection as follwo
MISO → MISO
MOSI ->MOSI
CS > LOW TIED TO GROUND
RESTET LEFT ALONE
SCK → SCK
WHAT IS PROBLEM

## Replies

### Reply 1 by Edward, 2015-07-19

Hi

Sorry to late your answer

you checking the W5500 datasheet.

And I need you code.

you using arduino example code?

there is 3 fact.

First, module broken. → This problem is probably not

Second, you connected LAN port ? and you check link LED blink?

third, SPI signal matching is wrong. check to below code. below code is SPI each signal part matching code

```
// CLK pin enable
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; // External clock

//MISO pin enable
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; // Master in Slave out -> Floating = high Impedence

//MOSI pin enable
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; // Master Out Slave in (Slave is external)

//CS pin enable
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; // GPIO_Mode_Out_OD - open drain (open collect) -> It's want Pull up resistor

//RESET pin enable
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; // M3 (Master) -> W5500 (Slave)

//INT pin enable
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; // internal Pull up
```

Thank you

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Source: https://maker.wiznet.io/forum/11145