Copyright © 2012 IEEE. All rights reserved. 1
IEEE Standard for Ethernet
SECTION TWO
Contents
This section includes Clause 21 through Clause 33 and Annex 22A through Annex 33A.
21. Introduction to 100 Mb/s baseband networks, type 100BASE-T ......................................................... 39
21.1 Overview........................................................................................................................
............. 39
21.1.1 Reconciliation Sublayer (RS) and Media Independent
Interface (MII) ............................. 40
21.1.2 Physical Layer signaling systems ....................................................................................... 40
21.1.3 Repeater .......................................................................................................................
....... 40
21.1.4 Auto-Negotiation ..............................................................................................................
.. 40
21.1.5 Management....................................................................................................................
.... 40
21.2 References......................................................................................................................
............. 40
21.3 Definitions .....................................................................................................................
............. 40
21.4 Abbreviations....................................................................................................................
.......... 40
21.5 State diagrams...................................................................................................................
.......... 40
21.5.1 Actions inside state blocks.................................................................................................. 41
21.5.2
State diagram variables......................................................................................................
. 41
21.5.3 State transitions............................................................................................................
....... 41
21.5.4 Operators......................................................................................................................
....... 41
21.6 Protocol implementation conformance st
atement (PICS) proforma........................................... 43
21.6.1 Introduction..................................................................................................................
....... 43
21.6.2 Abbreviations and special symbols..
................................................................................... 43
21.6.3 Instructions for completing the PICS proforma
.................................................................. 43
21.6.4 Additional information ....................................................................................................... 44
21.6.5
Exceptional information ............
......................................................................................... 44
2 Copyright © 2012 IEEE. All rights reserved.
21.6.6 Conditional items................................................................................................................ 44
21.7 MAC delay constraints (exposed MII) ....................................................................................... 45
22. Reconciliation Sublayer (RS) and Media Independent Interface (MII)................................................ 47
22.1
Overview........................................................................................................................
............. 47
22.1.1 Summary of major concepts ............................................................................................... 48
22.1.2 Application...................................................................................................................
....... 48
22.1.3 Rates of operation ...........................................................................................................
.... 49
22.1.4 Allocation of functions ......................................................................................................
. 49
22.1.5 Relationship of MII and GMII............................................................................................ 49
22.2 Functional specifications ........................................................................................................
.... 49
22.2.1 Mapping of MII signals to PLS service primitives and Station Management
.................... 49
22.2.1.1 Mapping of PLS_DATA.request .............................................................................. 50
22.2.1.1.1 Function .......................................................................................................... 50
22.2.1.1.2 Semantics of the service primitive.................................................................. 50
22.2.1.1.3 When generated .............................................................................................. 50
22.2.1.2 Mapping of PLS_DATA.indication.......................................................................... 51
22.2.1.2.1 Function .......................................................................................................... 51
22.2.1.2.2 Semantics of the service primitive.................................................................. 51
22.2.1.2.3 When generated .............................................................................................. 51
22.2.1.3 Mapping of PLS_CARRIER.indication ................................................................... 51
22.2.1.3.1 Function .......................................................................................................... 51
22.2.1.3.2 Semantics of the service primitive.................................................................. 51
22.2.1.3.3 When generated .............................................................................................. 51
22.2.1.4 Mapping of PLS_SIGNAL.indication ...................................................................... 52
22.2.1.4.1 Function .......................................................................................................... 52
22.2.1.4.2 Semantics of the service primitive.................................................................. 52
22.2.1.4.3 When generated .............................................................................................. 52
22.2.1.5 Response to RX_ER indication from MII ............................................................... 52
22.2.1.6 Conditions for generation of TX_ER........................................................................ 52
22.2.1.7 Mapping of PLS_DATA_VALID.
i
ndication ........................................................... 53
22.2.1.7.1 Function .......................................................................................................... 53
22.2.1.7.2 Semantics of the service primitive.................................................................. 53
22.2.1.7.3 When generated .............................................................................................. 53
22.2.2 MII signal functional specifications
..
................................................................................. 53
22.2.2.1 TX_CLK (transmit clock)......................................................................................... 53
22.2.2.2 RX_CLK (receive clock) .......................................................................................... 53
22.2.2.3 TX_EN (transmit enable).......................................................................................... 54
22.2.2.4 TXD (transmit data).................................................................................................. 54
22.2.2.5 TX_ER (transmit coding error)................................................................................. 55
22.2.2.6 Transmit direction LPI transition
...
........................................................................... 56
22.2.2.7 RX_DV (Receive Data Valid) .
................................................................................. 56
22.2.2.8 RXD (receive data) .................................................................................................. 56
22.2.2.9 Receive direction LPI transition .
.............................................................................. 58
22.2.2.10 RX_ER (receive error).............................................................................................. 58
22.2.2.11 CRS (carrier sense) ................................................................................................... 59
22.2.2.12 COL (collision detected)...........................................................................................
59
22.2.2.13 MDC (management data clock)................................................................................ 60
22.2.2.14 MDIO (management data input/output) ................................................................... 60
22.2.3 MII data stream............................................................................................................
...
.... 61
22.2.3.1 Inter-frame ................................................................................................................ 61
22.2.3.2
Preamble and start of frame delimiter..
..................................................................... 61
22.2.3.2.1 Transmit case .................................................................................................. 61
Copyright © 2012 IEEE. All rights reserved. 3
22.2.3.2.2 Receive case.................................................................................................... 62
22.2.3.3 Data........................................................................................................................... 63
22.2.3.4 End-of-Frame delimiter (EFD) ................................................................................. 63
22.2.3.5 Handling of excess nibbles ....................................................................................... 63
22.2.4 Management functions.......................................................................................................
. 63
22.2.4.1
Control register (Register 0) .................................................................................... 64
22.2.4.1.1 Reset............................................................................................................... 64
22.2.4.1.2 Loopback ....................................................................................................... 65
22.2.4.1.3 Speed selection ............................................................................................... 66
22.2.4.1.4 Auto-Negotiation enable................................................................................. 66
22.2.4.1.5 Power down ................................................................................................... 66
22.2.4.1.6 Isolate.............................................................................................................. 67
22.2.4.1.7 Restart Auto-Negotiation................................................................................ 67
22.2.4.1.8 Duplex mode.................................................................................................. 67
22.2.4.1.9 Collision test ................................................................................................... 67
22.2.4.1.10 Speed selection ............................................................................................... 68
22.2.4.1.11 Reserved bits................................................................................................... 68
22.2.4.1.12 Unidirectional enable...................................................................................... 68
22.2.4.2 Status register (Register 1)......................
..
................................................................ 68
22.2.4.2.1 100BASE-T4 ability ....................................................................................... 68
22.2.4.2.2 100BASE-X full duplex ability ..............
....................................................... 68
22.2.4.2.3 100BASE-X half duplex ability..................................................................... 70
22.2.4.2.4 10 Mb/s full duplex ability............................................................................. 70
22.2.4.2.5 10 Mb/s half duplex ability............................................................................ 70
22.2.4.2.6 100BASE-T2 full duplex ability.................................................................... 70
22.2.4.2.7 100BASE-T2 half duplex ability ................................................................... 70
22.2.4.2.8 Unidirectional ability ...................................................................................... 70
22.2.4.2.9 MF preamble suppression ability.................................................................... 70
22.2.4.2.10 Auto-Negotiation complete............................................................................. 70
22.2.4.2.11 Remote fault.................................................................................................... 71
22.2.4.2.12 Auto-Negotiation ability ................................................................................. 71
22.2.4.2.13 Link Status ...................................................................................................... 71
22.2.4.2.14 Jabber detect ................................................................................................... 71
22.2.4.2.15 Extended capability......................................................................................... 71
22.2.4.2.16 Extended status ............................................................................................... 72
22.2.4.3 Extended capability registers .................................................................................... 72
22.2.4.3.1 PHY Identifier (Registers 2 and 3) ................................................................. 72
22.2.4.3.2 Auto-Negotiation advertisement (Registe
r 4)
................................................ 73
22.2.4.3.3 Auto-Negotiation link partner ability (Register 5)
......................................... 73
22.2.4.3.4 Auto-Negotiation expansion (Register 6) ....................................................... 73
22.2.4.3.5 Auto-Negotiation Next Page (Register 7)....................................................... 73
22.2.4.3.6 Auto-Negotiation link partner
Received Next
Page (Register 8) ................... 73
22.2.4.3.7 MASTER-SLAVE control regist
er (Register 9)............................................. 73
22.2.4.3.8 MASTER-SLAVE status register (Register 10)............................................. 73
22.2.4.3.9 PSE Control register (Register 11) ................................................................. 73
22.2.4.3.10 PSE Status register (Register 12).................................................................... 74
22.2.4.3.11 MMD access control register (Register 13)
............................
........................ 74
22.2.4.3.12 MMD access address data register (Register 14)
............................................ 74
22.2.4.3.13 PHY specific registers .................................................................................... 75
22.2.4.4 Extended Status register (Register 15)...................................................................... 75
22.2.4.4.1 1000BASE-X full duplex ability .................................................................... 75
22.2.4.4.2 1000BASE-X half duplex ability................................................................... 76
22.2.4.4.3 1000BASE-T full duplex ability..................................................................... 76
22.2.4.4.4 1000BASE-T half duplex ability .................................................................... 76
4 Copyright © 2012 IEEE. All rights reserved.
22.2.4.4.5 Reserved bits................................................................................................... 76
22.2.4.5 Management frame structure .................................................................................... 76
22.2.4.5.1 IDLE (IDLE condition) .................................................................................. 76
22.2.4.5.2 PRE (preamble)............................................................................................... 76
22.2.4.5.3 ST (start of frame)........................................................................................... 77
22.2.4.5.4 OP (operation code) ........................................................................................ 77
22.2.4.5.5 PHYAD (PHY Address)................................................................................. 77
22.2.4.5.6 REGAD (Register Address)............................................................................ 77
22.2.4.5.7 TA (turnaround)............................................................................................. 77
22.2.4.5.8 DATA (data) ................................................................................................... 77
22.3 Signal timing characteristics................................................................................................
...
.... 78
22.3.1 Signals that are synchronous to TX_CLK ..........
................................................................ 78
22.3.1.1 TX_EN...................................................................................................................... 78
22.3.1.2
TXD<3:0>................................................................................................................. 78
22.3.1.3 TX_ER ...................................................................................................................... 78
22.3.2
Signals that are synchronous to RX_CLK ..........
................................................................ 78
22.3.2.1 RX_DV ..................................................................................................................... 79
22.3.2.2
RXD<3:0> ................................................................................................................ 79
22.3.2.3 RX_ER...................................................................................................................... 79
22.3.3
Signals that have no required clock relationship ................................................................ 79
22.3.3.1 CRS.........................................................................................................................
.. 79
22.3.3.2 COL ........................................................................................................................
.. 79
22.3.4 MDIO timing relationship to MDC .................................................................................... 79
22.4 Electrical characteristics ..................................
........................................................................... 80
22.4.1 Signal levels.................................................................................................................
....... 80
22.4.2 Signal paths..................................................................................................................
....... 81
22.4.3 Driver characteristics ........................................................................................................
.. 81
22.4.3.1 DC characteristics ..................................................................................................... 81
22.4.3.2 AC characteristics ..................................................................................................... 81
22.4.4 Receiver characteristics ...................................................................................................
..
. 82
22.4.4.1 Voltage thresholds .................................................................................................... 82
22.4.4.2 Input current.............................................................................................................. 82
22.4.4.3
Input capacitance ...................................................................................................... 82
22.4.5 Cable characteristics .........................................................................................................
.. 82
22.4.5.1 Conductor size .......................................................................................................... 83
22.4.5.2 Characteristic impedance.......................................................................................... 83
22.4.5.3 Delay.....................................................................................................................
..
.. 83
22.4.5.4 Delay variation.......................................................................................................... 84
22.4.5.5 Shielding ..................................................................................................................
. 84
22.4.5.6 DC resistance ............................................................................................................ 84
22.4.6 Hot insertion and removal................................................................................................... 84
22.5
Power supply.....................................................................................................................
.......... 84
22.5.1 Supply voltage ................................................................................................................
.... 84
22.5.2 Load current.................................................................................................................
....... 85
22.5.3 Short-circuit protection .....................................................................................................
.. 85
22.6 Mechanical characteristics......................................................................................................
.... 85
22.6.1 Definition of mechanical interface .....................
................................................................ 85
22.6.2 Shielding effectiveness and transfer impedance .
................................................................ 85
22.6.3 Connector pin numbering ..........
......................................................................................... 86
22.6.4 Clearance dimensions ......................................................................................................... 86
22.6.5
Contact assignments ..........................................................................................................
. 87
22.7 LPI assertion and detection.....................................................................................................
.... 88
22.7.1 LPI messages ..................................................................................................................
.... 89
22.7.2 Transmit LPI state diagram................................................................................................. 89
Copyright © 2012 IEEE. All rights reserved. 5
22.7.2.1 Conventions .............................................................................................................. 89
22.7.2.2 Variables and counters.............................................................................................. 89
22.7.2.3 State diagram
.................................................................................................................................. 90
22.7.3 Considerations for transmit system behavior......
................................................................ 90
22.7.3.1 Considerations for receive sys
tem behavior ............................................................. 90
22.8 Protocol implementation conformance st
atement (PICS) proforma for Clause 22,
Reconciliation Sublayer (RS)
and Media Independent Interface (MII) ..................................... 91
22.8.1 Introduction..................................................................................................................
....... 91
22.8.2 Identification................................................................................................................
....... 91
22.8.2.1 Implementation identification................................................................................... 91
22.8.2.2 Protocol summary ..................................................................................................... 91
22.8.2.3 Major capabilities/options ........................................................................................ 92
22.8.3 PICS proforma tables for reconciliation subl
ayer and
media independent interface ......... 92
22.8.3.1 Mapping of PLS service primitives .......................................................................... 92
22.8.3.2 MII signal functional specifications ......................................................................... 92
22.8.3.3 LPI functions............................................................................................................
. 94
22.8.3.4
Frame structure ......................................................................................................... 95
22.8.3.5 Management functions.............................................................................................. 95
22.8.3.6 Signal timing characteristics..................................................................................... 99
22.8.3.7 Electrical characteristics ......................................................................................... 100
22.8.3.8 Power supply........................................................................................................... 102
22.8.3.9 Mechanical characteristics...................................................................................... 102
23. Physical Coding Sublayer (PCS), Physical Med
i
um Attachment (PMA) sublayer and baseband
medium, type 100BASE-T4 .............................................................................................................
.. 103
23.1 Overview........................................................................................................................
........... 103
23.1.1 Scope.........................................................................................................................
........ 103
23.1.2 Objectives ....................................................................................................................
..... 103
23.1.3 Relation of 100BASE-T4 to other standards ......
.............................................................. 103
23.1.4 Summary......................................................................................................................
..... 103
23.1.4.1 Summary of Physical Coding Sublayer (PCS) specification.
................................. 104
23.1.4.2 Summary of physical medium attachment (PMA) sp
ecification............................ 106
23.1.5 Application of 100BASE-T4 ............................................................................................ 106
23.1.5.1 Compatibility considerations .................................................................................. 106
23.1.5.2 Incorporating the 100BASE-T4 PHY into a DTE
...
............................................... 107
23.1.5.3 Use of 100BASE-T4 PHY for point-to-point
communication ............................... 107
23.1.5.4 Support for Auto-Negotiation................................................................................. 107
23.2 PCS functional specifications ................................................................................................... 10
7
23.2.1 PCS functions .................................................................................................................
.. 107
23.2.1.1 PCS Reset function ................................................................................................. 107
23.2.1.2 PCS Transmit function............................................................................................ 108
23.2.1.2.1 DC balance encoding rules ........................................................................... 109
23.2.1.3 PCS Receive function ............................................................................................. 109
23.2.1.3.1 Error-detecting rules ..................................................................................... 110
23.2.1.4 PCS Error Sense function ....................................................................................... 111
23.2.1.5 PCS Carrier Sense function .................................................................................... 111
23.2.1.6 PCS Collision Presence function ............................................................................ 111
23.2.2 PCS interfaces..............................................................................................................
...
.. 112
23.2.2.1 PCS–MII interface signals ...................................................................................... 112
23.2.2.2 PCS–Management entity signals .................
........................................................... 112
23.2.3 Frame structure ...............................................................................................................
.. 112
23.2.4 PCS state diagrams ........................................................................................................... 11
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