---
title: "Migrating from W7100A-S2E to SPI one"
url: "https://maker.wiznet.io/forum/12502"
markdown_url: "https://maker.wiznet.io/forum/12502/md"
type: "Forum topic"
category: "MCU & Boards"
author: "pertosa"
created: "2017-10-02T13:38:00+09:00"
last_activity: "2018-03-08T12:25:43+09:00"
language: "en"
views: 649
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# Migrating from W7100A-S2E to SPI one

## Question

Asked by pertosa on 2017-10-02 in MCU & Boards.

Dear support,

We have been using the chip W7100A for Serial RS-232 to Ethernet application. It seems to be a bit slow for graphic transfer.

Could you please recommend one for SPI to Ethernet application? I have seen many options on the product page website. Could you indicate one for fast graphic transfer?

Best Regards

## Replies

### Reply 1 by pertosa, 2018-03-08

Dear Support,

We still have this need.

Could you recommend a chip for our application?

What is the difference from using W7500 to W5500?

We have our own microcontroller and just would like to receive/send the data via SPI, without developing internet & TCP/IP stacks.

We have an urgent need and we have no time do develop all the Internet & TCP/IP stack. So which one is better to us?

Thanks

---

Source: https://maker.wiznet.io/forum/12502