88F6281

Hardware Specifications

1.2.7Serial Management Interface (SMI) Interface Pin Assignments

Table 9: Serial Management Interface (SMI) Pin Assignments

Pin Name

I/O

Pin

Power

Description

 

 

Type

Rail

 

 

 

 

 

 

GE_MDC

t/s

CMOS/

VDD_GE_A

Management Data Clock

 

O

 

 

MDC is derived from TCLK divided by 128.

 

 

 

 

Provides the timing reference for the transfer of the MDIO signal.

 

 

 

 

 

GE_MDIO

t/s

CMOS

VDD_GE_A

Management Data In/Out

 

I/O

 

 

Used to transfer control and status information between PHY

 

 

 

 

devices and the GbE controller.

 

 

 

 

NOTE: An external pullup is required.

 

 

 

 

 

Doc. No. MV-S104859-U0 Rev. E

 

Copyright © 2008 Marvell

Page 32

Document Classification: Proprietary Information

December 2, 2008, Preliminary

Page 32
Image 32
Marvel Group 88F6281 Serial Management Interface SMI Interface Pin Assignments, Gemdc Cmos Vddgea, Gemdio Cmos Vddgea