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 

Method II - RGMII Implementation Using the Internal Clock Delay Feature

In this mode the internal clock delay feature is used i.e. MII Register bit 23.8 is set.

Board Layout

VDDIO=3.0 - 3.6v

RXC

RX_CTL

RD3

RD2

RD1

RD0

MAC

TD3

TD2

TD1

TD0

TX_CTL

TXC

VSC8201DL

VDDIO=3.0 - 3.6v

VSC8201

700ps of additional trace delay w.r.t TXC

Benefits

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

• Does not require any additional delays on the TXC and RXC traces.

Drawbacks

• Needs extra board space for the additional trace delays needed on the TD[3:0] and the TX_CTL traces.

Rev. 1.6.3 - 9/29/04

VITESSE - CONFIDENTIAL & PROPRIETARY - DO NOT COPY WITHOUT PERMISSION

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