---
title: "W6100 schamtic query"
url: "https://maker.wiznet.io/forum/15744"
markdown_url: "https://maker.wiznet.io/forum/15744/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "kirany"
created: "2025-06-02T18:41:15+09:00"
last_activity: "2025-06-05T08:22:18+09:00"
language: "en"
views: 7
replies: 2
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

# W6100 schamtic query

## Question

Asked by kirany on 2025-06-02 in Ethernet Chips.

Hello Team,

I am using W6100 for our project. We are referring W6100 schmeatic for wiznet website. I have 1 query,

https://docs.wiznet.io/Product/iEthernet/W6100/ref-schematic

1) how should i connect pins 1V2D, 1V2A, 1V2O, 3V3A,3V3D pins

2) if 1V2A and 1V2D are connected together then what the use of L1, L2 which are given for Power noise decrease circuits

## Replies

### Reply 1 by kirany, 2025-06-02

oK. Thanks for prompt response. i have one more query if we keep DAT0-DAT7 floating for SPI as mentioned tin datasheet, wiil it affect/add noise and distortions in circuit as we keeping it floating

### Reply 2 by Alan, 2025-06-05

No, it should not cause any noise interference.

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Source: https://maker.wiznet.io/forum/15744