VSC8201 Просмотр технического описания (PDF) - Vitesse Semiconductor

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VSC8201

SimpliPHY® VSC8201 PCB Design and Layout Guide Single Port 10/100/1000BASE-Tand 1000BASE-X PHY

Vitesse Semiconductor 

VSC8201DL

RGMII Single 3.3v Supply Implementation Methods

Method I - Standard RGMII Implementation

In this mode the Internal Clock Delay feature of the PHY is not enabled. See MII Register 23.8 for more information.

Board Layout

VDDIO=3.0 - 3.6v

1.5ns-2ns PCB trace additional PCB trace delay

VDDIO=3.0 - 3.6v

MAC

RXC

RX_CTL

RD3

RD2

RD1

RD0

TD3

TD2

TD1

TD0

TX_CTL

TXC

VSC8201

1.5ns-2ns PCB trace additional PCB trace delay

Benefits

• Does not require an external 2.5v supply, thereby reducing overall system cost.

Drawbacks

• Needs extra board space for the additional trace delays on the RXC and TXC traces.

Rev. 1.6.3 - 9/29/04

VITESSE - CONFIDENTIAL & PROPRIETARY - DO NOT COPY WITHOUT PERMISSION

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