ISO 21111-2:2020

INTERNATIONAL ISO
STANDARD 21111-2
First edition
2020-10
Road vehicles — In-vehicle Ethernet —
Part 2:
Common physical entity requirements
Véhicules routiers — Ethernet embarqué —
Partie 2: Exigences de l’entité physique commune
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Media independent interfaces . 2
5.1 General . 2
5.2 RGMII . 2
5.2.1 General. 2
5.2.2 RGMII signals . 3
5.2.3 Electrical signal voltage level . 6
5.2.4 Electrical signal timing . 7
5.2.5 Mapping GMII signals into RGMII electrical signals .12
6 Wake-up and synchronised link sleep functionality .13
6.1 General .13
6.2 Power state, algorithms, and service interfaces .13
6.3 Neighbour physical entities .16
6.4 Synchronised link sleep algorithm .17
6.5 Wake-up algorithm .18
6.6 Wake I/O block .18
6.7 Physical entity power state .19
6.7.1 Physical entity power state variables .19
6.8 PHY service interface .19
6.8.1 PHY_LinkSleep.request . . .19
6.8.2 PHY_LinkSleep.indication .20
6.8.3 PHY_WakeUp.request .20
6.8.4 PHY_WakeUp.indication .20
6.8.5 PHY_ConfigSleepReject.request .21
6.8.6 PHY_SleepStatus.indication .21
6.8.7 PHY_LinkSleepRequestEvent.indication .21
6.8.8 PHY_LinkSleepRequestAbort.request .22
6.9 Neighbour service interface .22
6.9.1 NPHY_WakeUpForward.request .22
6.9.2 NPHY_WakeUpForward.indication .22
6.10 Timing requirements .23
6.10.1 Synchronised link sleep algorithm timing requirements .23
6.10.2 Wake-up algorithm timing requirements .23
6.11 Quiescence current .27
Bibliography .28
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 31,
Data communication.
A list of all parts in the ISO 21111 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

Introduction
The ISO 21111 series includes in-vehicle Ethernet requirements and test plans that are disseminated in
other International Standards and complements them with additional test methods and requirements.
The resulting requirement and test plans are structured in different documents following the Open
Systems Interconnection (OSI) reference model and grouping the documents that depend on the
physical media and bit rate used.
In general, the Ethernet requirements are specified in ISO/IEC/IEEE 8802-3. The ISO 21111 series
provides supplemental specifications (e.g. wake-up, I/O functionality), which are required for in-vehicle
Ethernet applications. In road vehicles, Ethernet networks are used for different purposes requiring
different bit-rates. Currently, the ISO 21111 series specifies the 1-Gbit/s optical and 100-Mbit/s
electrical physical layer.
The ISO 21111 series contains requirement specifications and test methods related to the in-vehicle
Ethernet. This includes requirement specifications for physical layer entity (e.g. connectors, physical
layer implementations) providers, device (e.g. electronic control units, gateway units) suppliers, and
system (e.g. network systems) designers. Additionally, there are test methods specified for conformance
testing and for interoperability testing.
Safety (electrical safety, protection, fire, etc.) and electromagnetic compatibility (EMC) requirements
are out of the scope of the ISO 21111 series.
The structure of the specifications given in the ISO 21111 series complies with the Open Systems
[1] [5]
Interconnection (OSI) reference model specified in ISO/IEC 7498-1 and ISO/IEC 10731 .
ISO 21111-1 defines the terms which are used in this series of standards and provides an overview of
the standards for in-vehicle Ethernet including the complementary relations to ISO/IEC/IEEE 8802-3,
the document structure, type of physical entities, in-vehicle Ethernet specific functionalities and so on.
ISO 21111-2 specifies the interface between reconciliation sublayer and physical entity including
reduced gigabit media independent interface (RGMII), and the common physical entity wake-up and
synchronised link sleep functionalities, independent from physical media and bit rate.
This document specifies supplemental requirements to a physical layer capable of transmitting
1-Gbit/s over plastic optical fibre compliant with ISO/IEC/IEEE 8802-3, with specific application to
communications inside road vehicles, and a test plan for physical entity conformance testing.
ISO 21111-4 specifies the optical components requirements and test methods for 1-Gbit/s optical in-
vehicle Ethernet.
ISO 21111-5 specifies, for 1-Gbit/s optical in-vehicle Ethernet, requirements on the physical layer at
system level, requirements on the interoperability test set-ups, the interoperability test plan that checks
the requirements for the physical layer at system level, requirements on the device-level physical layer
conformance test set-ups, and device-level physical layer conformance test plan that checks a set of
requirements for the OSI physical layer that are relevant for device vendors.
ISO 21111-6 specifies advanced features of an ISO/IEC/IEEE 8802-3 in-vehicle Ethernet physical layer
(often also called transceiver), e.g. for diagnostic purposes for in-vehicle Ethernet physical layers. It
specifies advanced physical layer features, wake-up and sleep features, physical layer test suite,
physical layer control requirements and conformance test plan, physical sublayers test suite and
physical sublayers requirements and conformance test plan.
ISO 21111-7 specifies the implementation for ISO/IEC/IEEE 8802-3:2017/Amd 1:2017, which defines
the interface implementation for automotive applications together with requirements on components
used to realize this Bus Interface Network (BIN). ISO 21111-7 also defines further testing and system
requirements for systems implemented according to the system specification. In addition,
...