IEEE 802.3cy-2023

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IEEE Standard for Ethernet Amendment 8: Physical Layer Specifications and Management Parameters for 25 Gb/s – Electrical Automotive Ethernet (Published)

Published By	Publication Date	Number of Pages
IEEE	2023	137

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Description

Amendment Standard – Active. This amendment to IEEE Std 802.3-2022 adds physical layer specifications and management parameters for 25 Gb/s operation on a single balanced pair of conductors suitable for automotive applications.

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PDF Pages	PDF Title
1	Front Cover
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
11	Introduction
14	Contents
22	1. Introduction 1.4 Definitions
23	30. Management 30.3 Layer management for DTEs 30.3.2 PHY device managed object class 30.3.2.1 PHY device attributes 30.3.2.1.2 aPhyType 30.3.2.1.3 aPhyTypeList 30.5 Layer management for medium attachment units (MAUs) 30.5.1 MAU managed object class 30.5.1.1 MAU attributes 30.5.1.1.2 aMAUType 30.6 Management for link Auto-Negotiation 30.6.1 Auto-Negotiation managed object class 30.6.1.1 Auto-Negotiation attributes 30.6.1.1.5 aAutoNegLocalTechnologyAbility
24	45. Management Data Input/Output (MDIO) Interface 45.2 MDIO Interface registers 45.2.1 PMA/PMD registers 45.2.1.7 PMA/PMD status 2 register (Register 1.8) 45.2.1.7.4 Transmit fault (1.8.11) 45.2.1.7.5 Receive fault (1.8.10)
25	45.2.1.16 BASE-T1 PMA/PMD extended ability register (1.18) 45.2.1.16.a 25GBASE-T1 ability (1.18.7) 45.2.1.214 BASE-T1 PMA/PMD control register (Register 1.2100)
26	45.2.1.214.2 Type selection (1.2100.3:0) 45.2.1.244 MultiGBASE-T1 training register (1.2311) 45.2.1.244.1 Interleave request (1.2311.12:11)
27	45.2.1.245 MultiGBASE-T1 link partner training register (1.2312) 45.2.1.245.1 Link partner interleave request (1.2312.12:11) 45.2.1.246 MultiGBASE-T1 test mode control register (1.2313) 45.2.1.246.1 Test mode control (1.2313.15:13) 45.2.1.246.2 Local transmitter precoder override (1.2313.11)
28	45.2.1.246.3 Local transmit precoder setting (1.2313.10:9) 45.2.1.246.4 Jitter test control (1.2313.1:0) 45.2.3 PCS Registers 45.2.3.87 MultiGBASE-T1 PCS status 2 register (Register 3.2324) 45.2.3.87.2 PCS high RFER (3.2324.9)
29	78. Energy-Efficient Ethernet (EEE) 78.1 Overview 78.1.4 PHY types optionally supporting EEE 78.2 LPI mode timing parameters description 78.3 Capabilities Negotiation
30	78.5 Communication link access latency
32	98. Auto-Negotiation for single differential-pair media 98.5 Detailed functions and state diagrams 98.5.1 State diagram variables
33	104. Power over Data Lines (PoDL) of Single-Pair Ethernet 104.1 Overview 104.1.3 PoDL system types
34	105. Introduction to 25 Gb/s networks 105.1 Overview 105.1.2 Relationship of 25 Gigabit Ethernet to the ISO OSI reference model 105.1.3 Nomenclature
35	105.2 Physical Layer signaling systems
36	105.3 Summary of 25 Gigabit Ethernet sublayers 105.3.2 Physical Coding Sublayer (PCS) 105.3.4 Physical Medium Attachment (PMA) sublayer 105.3.6 Auto-Negotiation (AN) 105.5 Delay constraints
37	105.7 Protocol implementation conformance statement (PICS) proforma
38	149. Physical Coding Sublayer (PCS), Physical Medium Attachment (PMA) sublayer, and baseband medium, type 2.5GBASE-T1, 5GBASE-T1, and 10GBASE-T1 149.3 Physical Coding Sublayer (PCS) functions 149.3.7 Detailed functions and state diagrams 149.3.7.2 State diagram parameters 149.3.7.2.2 Variables
39	165. Physical Coding Sublayer (PCS), Physical Medium Attachment (PMA) sublayer, and baseband medium, type 25GBASE-T1 165.1 Overview 165.1.1 Nomenclature 165.1.2 Relationship of 25GBASE-T1 to other standards
40	165.1.3 Operation of 25GBASE-T1
41	165.1.3.1 Physical Coding Sublayer (PCS)
43	165.1.3.2 Physical Medium Attachment (PMA) sublayer 165.1.3.3 EEE Capability 165.1.3.4 Link Synchronization
44	165.1.4 Signaling 165.1.5 Interfaces 165.1.6 Conventions in this clause 165.2 25GBASE-T1 service primitives and interfaces
45	165.2.1 Technology Dependent Interface 165.2.1.1 PMA_LINK.request 165.2.1.1.1 Semantics of the primitive 165.2.1.1.2 When generated 165.2.1.1.3 Effect of receipt 165.2.1.2 PMA_LINK.indication 165.2.1.2.1 Semantics of the primitive
46	165.2.1.2.2 When generated 165.2.1.2.3 Effect of receipt 165.2.2 PMA service interface 165.2.2.1 PMA_TXMODE.indication 165.2.2.1.1 Semantics of the primitive
47	165.2.2.1.2 When generated 165.2.2.1.3 Effect of receipt
48	165.2.2.2 PMA_CONFIG.indication 165.2.2.2.1 Semantics of the primitive 165.2.2.2.2 When generated 165.2.2.2.3 Effect of receipt 165.2.2.3 PMA_UNITDATA.request 165.2.2.3.1 Semantics of the primitive 165.2.2.3.2 When generated
49	165.2.2.3.3 Effect of receipt 165.2.2.4 PMA_UNITDATA.indication 165.2.2.4.1 Semantics of the primitive 165.2.2.4.2 When generated 165.2.2.4.3 Effect of receipt 165.2.2.5 PMA_SCRSTATUS.request 165.2.2.5.1 Semantics of the primitive 165.2.2.5.2 When generated 165.2.2.5.3 Effect of receipt
50	165.2.2.6 PMA_PCSSTATUS.request 165.2.2.6.1 Semantics of the primitive 165.2.2.6.2 When generated 165.2.2.6.3 Effect of receipt 165.2.2.7 PMA_RXSTATUS.indication 165.2.2.7.1 Semantics of the primitive 165.2.2.7.2 When generated 165.2.2.7.3 Effect of receipt
51	165.2.2.8 PMA_REMRXSTATUS.request 165.2.2.8.1 Semantics of the primitive 165.2.2.8.2 When generated 165.2.2.8.3 Effect of receipt 165.2.2.9 PMA_PCSDATAMODE.indication 165.2.2.9.1 Semantics of the primitive 165.2.2.9.2 When generated 165.2.2.9.3 Effect of receipt
52	165.2.2.10 PMA_PCS_RX_LPI_STATUS.request 165.2.2.10.1 Semantics of the primitive 165.2.2.10.2 When generated 165.2.2.10.3 Effect of receipt 165.2.2.11 PMA_PCS_TX_LPI_STATUS.request 165.2.2.11.1 Semantics of the primitive 165.2.2.11.2 When generated 165.2.2.11.3 Effect of receipt 165.2.2.12 PMA_ALERTDETECT.indication
53	165.2.2.12.1 Semantics of the primitive 165.2.2.12.2 When generated 165.2.2.12.3 Effect of receipt 165.3 Physical Coding Sublayer (PCS) functions 165.3.1 PCS service interface (25GMII) 165.3.2 PCS functions
55	165.3.2.1 PCS Reset function 165.3.2.2 PCS Transmit function
57	165.3.2.2.1 Use of blocks 165.3.2.2.2 65B RS-FEC transmission code
58	165.3.2.2.3 Notation conventions
59	165.3.2.2.4 Block structure 165.3.2.2.5 Control codes
60	165.3.2.2.6 Ordered sets 165.3.2.2.7 Idle (/I/) 165.3.2.2.8 LPI (/LI/) 165.3.2.2.9 Start (/S/) 165.3.2.2.10 Terminate (/T/) 165.3.2.2.11 Ordered set (/O/) 165.3.2.2.12 Error (/E/) 165.3.2.2.13 Transmit process 165.3.2.2.14 RS-FEC framing and RS-FEC encoder
61	165.3.2.2.15 RS-FEC superframe and round-robin interleaving 165.3.2.2.16 RS-FEC recombine
62	165.3.2.2.17 Reed-Solomon encoder
63	165.3.2.2.18 PCS scrambler
64	165.3.2.2.19 Gray mapping for PAM4 encoding 165.3.2.2.20 Selectable precoder 165.3.2.2.21 PAM4 encoding 165.3.2.2.22 EEE capability
65	165.3.2.3 PCS Receive function
66	165.3.2.3.1 Frame and block synchronization 165.3.2.3.2 PCS descrambler 165.3.2.3.3 Invalid blocks 165.3.3 Test-pattern generators
67	165.3.4 Side-stream scrambler polynomials 165.3.5 PMA training frame 165.3.5.1 Generation of symbol Tn 165.3.5.2 PMA training mode descrambler polynomials 165.3.6 LPI signaling
69	165.3.6.1 LPI synchronization
70	165.3.6.2 Quiet period signaling 165.3.6.3 Refresh period signaling 165.3.7 Detailed functions and state diagrams 165.3.7.1 State diagram conventions 165.3.7.2 State diagram parameters 165.3.7.2.1 Constants 165.3.7.2.2 Variables
71	165.3.7.2.3 Timers 165.3.7.2.4 Functions 165.3.7.2.5 Counters 165.3.7.2.6 Messages 165.3.7.3 State diagrams
74	165.3.8 PCS management 165.3.9 25GBASE-T1 operations, administration, and maintenance (OAM) 165.3.9.1 Definitions 165.3.9.2 Functional specifications 165.3.9.2.1 25GBASE-T1 OAM frame structure
75	165.3.9.3 State diagram variable to OAM register mapping 165.3.9.4 Detailed functions and state diagrams 165.3.9.4.1 State diagram conventions 165.3.9.4.2 State diagram parameters 165.3.9.4.3 Variables
76	165.3.9.4.4 Counters 165.3.9.4.5 Functions 165.3.9.4.6 State diagrams 165.4 Physical Medium Attachment (PMA) sublayer 165.4.1 PMA functional specifications 165.4.2 PMA functions
77	165.4.2.1 PMA Reset function
78	165.4.2.2 PMA Transmit function 165.4.2.2.1 Global PMA transmit disable 165.4.2.3 PMA Receive function
79	165.4.2.4 PHY Control function 165.4.2.4.1 Infofield notation 165.4.2.4.2 Start of frame delimiter
80	165.4.2.4.3 Partial frame count (PFC24) 165.4.2.4.4 Message Field
81	165.4.2.4.5 PHY capability bits 165.4.2.4.6 Data switch partial frame count 165.4.2.4.7 Reserved fields
82	165.4.2.4.8 CRC16 165.4.2.4.9 PMA MDIO function mapping 165.4.2.4.10 Startup sequence
83	165.4.2.5 Link Monitor function 165.4.2.6 PHY Link Synchronization
85	165.4.2.6.1 State diagram variables 165.4.2.6.2 State diagram timers
86	165.4.2.6.3 Messages
87	165.4.2.6.4 State diagrams
88	165.4.2.7 Refresh monitor function 165.4.2.8 Clock Recovery function 165.4.3 MDI 165.4.3.1 MDI signals transmitted by the PHY 165.4.3.2 Signals received at the MDI
89	165.4.4 State variables 165.4.4.1 State diagram variables
90	165.4.4.2 Timers
92	165.4.5 State diagrams
94	165.5 PMA electrical specifications 165.5.1 Test modes
95	165.5.1.1 Test configurations 165.5.2 Test Points
96	165.5.3 Transmitter electrical specifications
97	165.5.3.1 Maximum output droop 165.5.3.2 Transmitter linearity 165.5.3.3 Transmitter timing jitter 165.5.3.3.1 Transmit MDI random jitter in MASTER mode
98	165.5.3.3.2 Transmit MDI deterministic jitter in MASTER mode 165.5.3.4 Transmitter power spectral density (PSD) and power level
99	165.5.3.5 Transmitter peak differential output 165.5.3.6 Transmitter clock frequency 165.5.4 Receiver electrical specifications
100	165.5.4.1 Receiver differential input signals 165.5.4.2 Alien crosstalk noise rejection 165.5.5 Test configurations 165.5.5.1 Host test configuration
101	165.5.5.2 Link segment test configuration
102	165.5.5.3 Mated test configurations 165.5.5.3.1 Insertion loss 165.5.5.3.2 Return loss
103	165.5.5.3.3 Mode Conversion 165.5.5.3.4 Crosstalk 165.6 Management interface 165.6.1 Optional support for Auto-Negotiation
104	165.7 Link segment characteristics 165.7.1 Link transmission parameters 165.7.1.1 Insertion loss
105	165.7.1.2 Differential characteristic impedance 165.7.1.3 Return loss 165.7.1.3.1 25GBASE-T1 link segment return loss
106	165.7.1.3.2 Characteristics of the echo from the link segment 165.7.1.3.3 Residual echo metric (REM) 165.7.1.3.4 Calculating residual echo metric
108	165.7.1.3.5 Limit on residual echo metric 165.7.1.3.6 Echo tail metric (ETM) 165.7.1.3.7 Calculating echo tail metric
110	165.7.1.3.8 Limit on echo tail metric 165.7.1.4 Coupling attenuation
111	165.7.1.5 Screening attenuation 165.7.1.6 Maximum link delay 165.7.2 Coupling parameters between link segments
112	165.7.2.1 Power sum alien near-end crosstalk (PSANEXT) 165.7.2.2 Power sum alien attenuation to crosstalk ratio far-end (PSAACRF)
113	165.8 MDI specification 165.8.1 MDI connectors
114	165.8.2 MDI electrical specification 165.8.2.1 MDI return loss
115	165.8.3 MDI fault tolerance 165.9 Environmental specifications 165.9.1 General safety 165.9.2 Network safety 165.9.2.1 Environmental safety 165.9.2.2 Electromagnetic compatibility 165.10 Delay constraints
117	165.11 Protocol implementation conformance statement (PICS) proforma for Clause 165, Physical Coding Sublayer (PCS), Physical Medium Attachment (PMA) sublayer, and baseband medium, type 25GBASE-T1 165.11.1 Introduction 165.11.2 Identification 165.11.2.1 Implementation identification 165.11.2.2 Protocol summary
118	165.11.3 Major capabilities/options 165.11.4 PICS proforma tables for Physical Coding Sublayer (PCS), Physical Medium Attachment (PMA) sublayer, and baseband medium, type 25GBASE-T1 165.11.4.1 General
119	165.11.4.2 Physical Coding Sublayer (PCS) 165.11.4.2.1 PCS Transmit
120	165.11.4.2.2 PCS Receive 165.11.4.2.3 Test-pattern generators
121	165.11.4.2.4 Side-stream scrambler 165.11.4.2.5 LPI signaling 165.11.4.2.6 Functions and state diagrams
122	165.11.4.2.7 PCS loopback
123	165.11.4.2.8 OAM 165.11.4.3 Physical Medium Attachment (PMA) 165.11.4.3.1 PMA Reset function
124	165.11.4.3.2 PMA Transmit function
125	165.11.4.3.3 PMA Receive function 165.11.4.3.4 PHY Control function
126	165.11.4.3.5 Link Monitor function
127	165.11.4.3.6 PHY Link Synchronization 165.11.4.3.7 Refresh monitor function
128	165.11.4.3.8 Clock Recovery function 165.11.4.3.9 MDI 165.11.4.3.10 PMA State variables 165.11.4.4 PMA electrical specifications 165.11.4.4.1 Test modes
129	165.11.4.4.2 Transmitter electrical specifications
130	165.11.4.4.3 Receiver electrical specifications 165.11.4.4.4 Mated test configurations
131	165.11.4.5 Link segment characteristics 165.11.4.6 MDI specifications 165.11.4.7 Delay constraints
132	Annex 98B (normative) IEEE 802.3 Selector Base Page definition 98B.3 Technology Ability Field bit assignments 98B.4 Priority Resolution
133	Annex 149B (informative) OAM status 149B.1 Purpose
134	Annex 165A (informative) Tx function to Rx function channel characteristics 165A.1 Overview 165A.2 TP2 to TP0 and TP3 to TP5 reference insertion loss
135	165A.2.1 Host PCB trace loss 165A.3 TP0 to TP5 channel insertion loss
136	165A.4 Example models for Tx/Rx function to MDI return loss 165A.5 Coupling between ports on multiport designs
137	Back Cover

Additional information

Standard Title	IEEE Standard for Ethernet Amendment 8: Physical Layer Specifications and Management Parameters for 25 Gb/s – Electrical Automotive Ethernet (Published)
Published Code	IEEE
Publication Date	2023
Pages Count	137

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IEEE 802.3cy-2023

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