LXT970ATC 查看數據表（PDF） - Intel

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LXT970ATC

Dual-Speed Fast Ethernet Transceiver

Intel 

Dual-Speed Fast Ethernet Transceiver — LXT970A

Contents

1.0

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

2.0

Functional Description...........................................................................................18

2.1 Introduction..........................................................................................................18

2.2 Interfaces (Network Media/Protocol Support) .....................................................19

2.2.1 Twisted-Pair Interface ............................................................................19

2.2.2 Fiber Interface ........................................................................................19

2.2.3 MII Interface ...........................................................................................20

2.2.3.1 Selectable Driver Levels............................................................20

2.2.3.2 MII Data Interface......................................................................21

2.2.3.3 Repeater Mode..........................................................................24

2.2.3.4 MII Management Interface ........................................................24

2.2.4 Hardware Control Interface ....................................................................26

2.3 Operating Requirements .....................................................................................27

2.3.1 Power Supply Requirements..................................................................27

2.3.1.1 Optional MII Power Supply ........................................................27

2.3.2 Reference Clock Requirements .............................................................27

2.3.2.1 Master Clock Mode ...................................................................28

2.3.2.2 Slave Clock Mode .....................................................................28

2.3.3 Bias Circuit Requirements......................................................................29

2.4 Initialization..........................................................................................................29

2.4.1 Control Mode Selection ..........................................................................29

2.4.1.1 MDIO Control Mode ..................................................................29

2.4.1.2 Manual Control Mode ................................................................29

2.4.2 Link Configuration ..................................................................................29

2.4.2.1 Manual Configuration ................................................................30

2.4.2.2 Auto-Negotiation/Parallel Detection ..........................................30

2.5 Monitoring Operational Status.............................................................................31

2.5.1 Monitoring Status via MII Registers........................................................31

2.5.2 Monitoring Status via Indicator Pins .......................................................32

2.6 100BASE-X Operation ........................................................................................32

2.6.1 100BASE-X MII Operations....................................................................32

2.6.2 100BASE-X Network Operations ...........................................................33

2.7 10BASE-T Operation...........................................................................................35

2.7.1 10BASE-T MII Operations......................................................................35

2.7.2 10BASE-T Network Operations..............................................................35

2.8 Protocol Sublayer Operations .............................................................................35

2.8.1 PCS Sublayer .........................................................................................35

2.8.1.1 100X Preamble Handling ..........................................................36

2.8.1.2 10T Preamble Handling.............................................................36

2.8.1.3 Data Errors (100X Only) ............................................................36

2.8.1.4 Collision Indication ....................................................................37

2.8.1.5 SQE (10T Only) .........................................................................38

2.8.1.6 Jabber (10T Only) .....................................................................38

2.8.2 PMA Layer..............................................................................................38

2.8.2.1 100TX Link Options ...................................................................38

2.8.2.2 10T Link Test.............................................................................38

Datasheet

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