LXT9782 datasheet(23/78 Pages) INTEL

Part #	LXT9782

Description	Fast Ethernet 10/100 Multi-Port Transceiver with Serial MII

PDF	78 Pages

Scroll/Zoom	100%

Manufacturer	INTEL [Intel Corporation]

Direct Link	http://www.intel.com

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23 / 78 page

Fast Ethernet 10/100 Multi-Port Transceiver with Serial MII — LXT9762/9782

Datasheet

MII Addressing

The protocol allows one controller to communicate with multiple LXT97x2 chips. Pins

ADD_<4:0> determine the base address. Each port adds its port number (0 through n) to the base

address to obtain its port address as shown in Figure 6.

Figure 6. Port Address Scheme

Figure 7. Management Interface Read Frame Structure

BASE ADDR

(ex. ADDR=4)

PHY ADDR (BASE+0)

PHY ADDR (BASE+1)

PHY ADDR (BASE+2)

PHY ADDR (BASE+3)

PHY ADDR (BASE+4)

PHY ADDR (BASE+5)

ex. 4

ex. 5

ex. 6

ex. 7

ex. 8

ex. 9

LXT9782

Port 0

Port 1

Port 2

Port 3

Port 4

Port 5

PHY ADDR (BASE+6)

PHY ADDR (BASE+7)

ex. 10

ex. 11

Port 6

Port 7

1. Ports 6 and 7 not available on the LXT9762.

MDC

MDIO

(Read)

32 "1"s

Preamble

Op Code

PHY Address

Turn

Around

D15

D14

Data

Write

Read

D15

D14

Idle

High Z

LXT9782 Datasheet(PDF) 23 Page - Intel Corporation

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