Pin and Signal Descriptions

Pin Descriptions

Table 8: Gigabit Ethernet Port0/1 Interface Pin Assignments (Continued)

Pin Name

I/O

Pin

Power

Description

 

 

Type

Rail

 

 

 

 

 

 

MPP[32]/GE1[12]

I/O

CMOS

VDD_GE_B

RGMII Transmit Clock

 

 

 

 

RGMII transmit reference output clock for GE_TXD[3:0] and

 

 

 

 

GE_TXCTL Provides 125 MHz, 25 MHz or 2.5 MHz clock.

 

 

 

 

Not used in MII/MMII mode.

 

 

 

 

 

 

 

 

 

MII/MMII Carrier Sense

 

 

 

 

Indicates that the receive medium is non-idle. In half-duplex

 

 

 

 

mode, GE_CRS is also asserted during transmission. Carrier

 

 

 

 

sense is not synchronous to any clock.

 

 

 

 

 

 

 

 

 

GMII Carrier Sense

 

 

 

 

 

MPP[33]/GE1[13]

t/s

CMOS

VDD_GE_B

RGMII Transmit Control

 

O

 

 

Transmit control synchronous to the GE_TXCLKOUT output

 

 

 

 

rising/falling edge.

 

 

 

 

GE_TXEN is presented on the rising edge of GE_TXCLKOUT.

 

 

 

 

A logical derivative of transmit enable transmit error is presented

 

 

 

 

on the falling edge of GE_TXCLKOUT.

 

 

 

 

 

 

 

 

 

MII/MMII Transmit Error

 

 

 

 

It is synchronous to transmit clock.

 

 

 

 

NOTE: Multiplexed on MPP.

 

 

 

 

 

 

 

 

 

GMII Transmit Error

 

 

 

 

It Is synchronous to GE_TXCLKOUT.

 

 

 

 

NOTE: Multiplexed on MPP.

 

 

 

 

 

MPP[34]/GE1[14]

O

CMOS

VDD_GE_B

MII/MMII Transmit Enable

 

 

 

 

Indicates that the packet is being transmitted to the PHY. It Is

 

 

 

 

synchronous to transmit clock.

 

 

 

 

 

MPP[35]/GE1[15]

I

CMOS

VDD_GE_B

MII/MMII Receive Error

 

 

 

 

Indicates that an error symbol, a false carrier, or a carrier

 

 

 

 

extension symbol is detected on the cable. It is synchronous to

 

 

 

 

GE_RXCLK input.

 

 

 

 

NOTE: Multiplexed on MPP.

 

 

 

 

 

Copyright © 2008 Marvell

 

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

December 2, 2008, Preliminary

Document Classification: Proprietary Information

Page 31

Page 31
Image 31
Marvel Group 88F6281 MPP32/GE112, Getxctl Provides 125 MHz, 25 MHz or 2.5 MHz clock, MII/MMII Carrier Sense, MPP33/GE113