LXT1000
—
Gigabit Ethernet Transceiver
6
Datasheet
5.0
6.0
Register Set
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Mechanical Specification
....................................................................................104
Figures
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LXT1000 Block Diagram .....................................................................................11
LXT1000 PBGA Assignments.............................................................................12
LXT1000 Applications.........................................................................................22
LXT1000 Block Diagram .....................................................................................23
Crossover Function.............................................................................................24
GMII Data Interface.............................................................................................27
Serial Interface....................................................................................................28
Relationship between 10 Mbps Serial Interface and 10 Mbps MII Interface.......28
10-Bit Interface (TBI)...........................................................................................29
Data Flow Between PHY and Mac......................................................................30
MDIO Read Frame Format .................................................................................31
MDIO Write Frame Format..................................................................................32
Interrupt Handling................................................................................................33
Quick Status Register .........................................................................................35
PHY Address Determination via LED balls .........................................................36
Overview of Link Establishment..........................................................................39
Link Speed and Corresponding Clock Frequency Changes ...............................45
1000BASE-T Functions Overview.......................................................................46
1000BASE-T Transmit Flow and Line Coding Scheme ......................................48
1000BASE-T Receive Flow.................................................................................49
1000BASE-T Frame Structure ............................................................................51
1000BASE-T Transmission (No Errors, No Collision, No Carrier Extension)......52
1000BASE-T Reception (No Errors, No Collision, No Carrier Extension)...........52
1000BASE-T Transmission with Collision...........................................................53
1000BASE-T False Carrier Detection .................................................................53
1000BASE-T Transmission with Error ................................................................54
1000BASE-T Reception with Error......................................................................54
1000BASE-T Transmission, Carrier Extend and Packet Concatenation ............55
1000BASE-T Reception, Carrier Extension and Packet Concatenation.............55
1000BASE-T Transmission Extend - Packet Concatenation and
Carrier Extension, with Errors .............................................................................56
1000BASE-T Reception Extend - Packet Concatenation and
Carrier Extension, with Errors .............................................................................56
Protocol Sublayers and Associated Functions....................................................57
100BASE-TX Frame Structure............................................................................59
100BASE-TX Data Flow......................................................................................59
100BASE-T Transmission (No Errors, No Collision, No Carrier Extension)........61
100BASE-T Reception (No Errors, No Collision, No Carrier Extension).............61
100BASE-TX Transmission with Collision ..........................................................61
Master/Slave Relationship ..................................................................................67
Typical MII/GMII Interface...................................................................................71
Typical Configuration - GMII Interface ................................................................72
NIC Application - Twisted-Pair Interface .............................................................73
1000BASE-T GMII Transmit Timing....................................................................77
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