---
title: "[From QnA] W5200 memory poniter initialisation"
url: "https://maker.wiznet.io/forum/9590"
markdown_url: "https://maker.wiznet.io/forum/9590/md"
type: "Forum topic"
category: "IO Modules"
author: "irina"
created: "2013-10-02T07:22:40+09:00"
last_activity: "2020-12-14T04:26:16+09:00"
language: "en"
views: 850
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# [From QnA] W5200 memory poniter initialisation

## Question

Asked by irina on 2013-10-02 in IO Modules.

## This post came from QnA of WIZnet website

Dear WIZnet

We are using W5200 ( WIZ820io R 1.0 ) . Configuration used is TCP client adn we are able to receive data from the server.
The question is, is it possible to initialise RX memory … or at least to initialise Sn_WRO and Sn_WR1 Pointer when we wish ( when we have established TCP connection ).
what happens if RX memory get filed … does it overflow ?

regards zorz

## Replies

### Reply 1 by irina, 2013-10-02

Dear customer,

Thanks for your interest in W5200.
W5200 don’t support a way to clear the buffer.
The only way to remove previous value is to overwrite it.
RX memory and TX memory are identical.
Please refer to as below.

[![](https://maker.wiznet.io/forum_uploads/wiznet/original/1X/ba73218dc1bce3d3576c33b2ece556c3bebf2e45.JPG) 520×609 47.3 KB](https://maker.wiznet.io/forum_uploads/wiznet/original/1X/ba73218dc1bce3d3576c33b2ece556c3bebf2e45.JPG)

Thanks.
WIZnet

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Source: https://maker.wiznet.io/forum/9590