General Initialization and Reset Operation

Signal

Ball

Name and Function

 

 

 

 

 

Carrier Sense.

 

 

TBI: Undefined.

 

 

GMII / MII: This signal indicates traffic activity on the cable, either

CRS

A6

incoming or outgoing. This signal is driven by the PHY. CS is not

required to transition synchronously with respect to the RX or TX

 

 

 

 

clocks. This signal is ignored in full-duplex mode.

 

 

Normal Mode: This signal must be connected to VSS except for test

 

 

mode.

 

 

 

RX_DATA[9] / RX_ER

A9

 

D10

 

RX_DATA[8] / RX_DV

Receive Data.

B9

RX_DATA[7]

TBI: RX_DATA[9:0] for receive data bus

C9

RX_DATA[6]

GMII: RX_DATA[7:0] for receive data bus.

D9

RX_DATA[5]

RX_ER signals a receive error. RX_DV is asserted to indicate data is

RX_DATA[4]

E9

valid on the interface.

RX_DATA[3]

E8

MII: RX_DATA[3:0] for receive data bus.

RX_DATA[2]

RX_ER signals a receive error. RX_DV indicates data is valid on the

C8

RX_DATA[1]

interface.

A7

RX_DATA[0]

 

B7

 

 

 

 

 

 

 

 

Receive Clock 0.

RBC0 / RX_CLK

C11

TBI: RBC0 is receive clock (62.5 Mbps).

GMII: RX_CLK is receive clock (125 Mbps).

 

 

MII: RX_CLK is receive clock for 100 Mbps operation (25 Mbps) and

 

 

for 10 Mbps operation (2.5 Mbps).

 

 

 

14.5.1Signal Interface

The external GMII/MII interface is similar in function to the interface used to communicate between the MAC and internal PHY. As with use of the internal PHY, the external GMII/MII interface supports 10/100/1000 Mbps operation, with both half- and full-duplex operation at 10/ 100 Mbps, and full-duplex operation at 1000 Mbps. Unlike the communication path to the internal PHY, the external interface does not provide certain additional control/status interfaces for automatic hardware link setup and/or power-management

Table 14-2lists the signals, functions, and pins used to provide this interface.

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Software Developer’s Manual

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Intel PCI-X, Intel Gigabit Ethernet Controllers manual Signal Interface, Carrier Sense, Receive Data, Receive Clock