---
title: "w6100"
url: "https://maker.wiznet.io/forum/15845"
markdown_url: "https://maker.wiznet.io/forum/15845/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "a13302543024"
created: "2025-08-19T11:08:44+09:00"
last_activity: "2025-08-20T10:04:02+09:00"
language: "en"
views: 7
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# w6100

## Question

Asked by a13302543024 on 2025-08-19 in Ethernet Chips.

How to set the SPI SCK signal of W6100 to 70 MHz, and what points need to be noted?

I can only achieve normal communication when setting it to 60 MHz, but it doesn't work properly at 70 MHz.

## Replies

### Reply 1 by Grace_Koo, 2025-08-20

Hello, could you please let me know which hardware environment (e.g., MCU) you are using with the W6100?

The W6100 does support an SPI clock of up to 70 MHz, but the actual performance may vary depending on the MCU capabilities and the signal lines.

---

Source: https://maker.wiznet.io/forum/15845