LXT9781 データシートの表示（PDF） - Intel

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LXT9781

Fast Ethernet 10/100 Multi-Port Transceiver with RMII

Intel 

Fast Ethernet 10/100 Multi-Port Transceiver with RMII — LXT9761/9781

Contents

1.0

Pin Assignments and Signal Descriptions ....................................................10

2.0

Functional Description...........................................................................................21

2.1 Introduction..........................................................................................................21

2.1.1 OSP™ Architecture ................................................................................21

2.1.2 Comprehensive Functionality .................................................................21

2.2 Interface Descriptions..........................................................................................22

2.2.1 10/100 Network Interface .......................................................................22

2.2.1.1 Twisted-Pair Interface ...............................................................22

2.2.1.2 Fiber Interface ...........................................................................23

2.2.2 RMII Interface.........................................................................................23

2.2.3 Configuration Management Interface .....................................................23

2.2.3.1 MDIO Management Interface ....................................................23

2.2.3.2 Hardware Control Interface .......................................................25

2.3 Operating Requirements .....................................................................................25

2.3.1 Power Requirements..............................................................................25

2.3.2 Clock Requirements ...............................................................................26

2.3.2.1 Reference Clock ........................................................................26

2.4 Initialization..........................................................................................................26

2.4.1 MDIO Control Mode ...............................................................................26

2.4.2 Hardware Control Mode .........................................................................26

2.4.3 Power-Down Mode.................................................................................27

2.4.3.1 Global (Hardware) Power Down................................................27

2.4.3.2 Port (Software) Power Down .....................................................27

2.4.4 Reset ......................................................................................................28

2.4.5 Hardware Configuration Settings ...........................................................28

2.5 Link Establishment ..............................................................................................29

2.5.1 Auto-Negotiation.....................................................................................29

2.5.1.1 Base Page Exchange................................................................29

2.5.1.2 Next Page Exchange.................................................................29

2.5.1.3 Controlling Auto-Negotiation .....................................................29

2.5.2 Parallel Detection ...................................................................................30

2.6 RMII Operation ....................................................................................................30

2.6.1 Reference Clock.....................................................................................31

2.6.2 Transmit Enable .....................................................................................31

2.6.3 Carrier Sense & Data Valid ....................................................................31

2.6.4 Receive Error .........................................................................................31

2.6.5 Loopback................................................................................................31

2.6.6 Out of Band Signalling............................................................................31

2.6.7 4B/5B Coding Operations.......................................................................32

2.7 100 Mbps Operation............................................................................................32

2.7.1 100BASE-X Network Operations ...........................................................32

2.7.2 100BASE-X Protocol Sublayer Operations ............................................33

2.7.2.1 PCS Sublayer ............................................................................33

2.7.2.2 PMA Sublayer ...........................................................................35

2.7.2.3 Twisted-Pair PMD Sublayer ......................................................36

2.7.2.4 Fiber PMD Sublayer ..................................................................37

Datasheet

3

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