Ethernet初识1

Ethernet初识1

Ehternet 初识 1

1, Outline

MAC
PHY

2,MIIM Pin Description
MII接口是MAC与PHY连接的标准接口

PIN Name

Direction

Description

TXD[0:3]

Mac to Phy

Transmit Data

TXEN

Mac to Phy

Transmit Enable

TXCLK

Mac to Phy

Transmit Clock

RXD[0:3]

Phy to Mac

Receive Data

RXEN

Phy to Mac

Receive Enable

RXCLK

Phy to Mac

Receive Clock

MDC

Mac to Phy

Management Data Clock

MDIO

Bidirection

Management Data I/O

 

MIIM只有两个线, 时钟信号MDC与数据线MDIO.读写命令均由Mac发起, PHY不能通过MIIM主动向Mac发送信息.由于MIIM只能有Mac发起, 我们可以操作的也就只有MAC上的寄存器.

3, Schema in Product
ethenet1
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