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LXT970ATC Datasheet(PDF) 3 Page - Intel Corporation

Part # LXT970ATC
Description  Dual-Speed Fast Ethernet Transceiver
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Manufacturer  INTEL [Intel Corporation]
Direct Link  http://www.intel.com
Logo INTEL - Intel Corporation

LXT970ATC Datasheet(HTML) 3 Page - Intel Corporation

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Datasheet
3
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


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