1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.TO PLACE A DOCUMENT ORDER: +1 (724) 776-4970 FAX: +1 (724) 776-0790SAE WEB ADDRESS http:
3、/www.sae.orgCopyright 2001 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICEJ2366-1ISSUEDNOV2001Issued 2001-11ITS Data BusIDB-C Physical LayerTABLE OF CONTENTS1. Scope . 22. References . 32.1
4、Applicable Publications 32.1.1 SAE Publications 32.2 Related Publications . 32.2.1 SAE Publications 32.2.2 AMI-C Publications. 43. Definitions. 43.1 CCP (Consumer Convenience Port) 43.2 Embedded IDB-C Component 43.3 IDB-C Number of Devices 43.4 Portable IDB-C Component 43.5 Power Mode (PMODE). 43.6
5、Vehicle Connector 44. Network Speed. 45. Network Topology 45.1.1 IDB-C Cable Segments 55.1.2 IDB-C Termination 55.1.3 Stubs and the Consumer Convenience Port (CCP) . 56. Vehicle Connector 66.1 Vehicle Connector Signals . 66.1.1 CAN(+) and CAN() . 66.1.2 PMODE 66.1.3 Spare 66.1.4 Lt Audio(+) and () .
6、 76.1.5 Rt Audio(+) and () . 76.1.6 Microphone(+) and () 76.1.7 VBatt and Ground . 7Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J2366-1 Issued NOV2001-2-6.2 Vehicle Connector Configuration and
7、Termination .76.3 IDB-C Con 86.3.1 Connector Testing 86.3.2 Isometric View 86.3.3 Face View .96.3.4 Sectioned Views .96.3.5 Pin Detail View 116.3.6 Construction Notes . 136.3.7 Mating Connector Requirements 13Figure 1 Scope of SAE J2366-1 .3Figure 2 Daisy Chain Wiring Configuration.5Figure 3 Stubs a
8、nd Consumer Convenience Port (CCP)6Figure 4 IDB-C Grounding Requirement .7Figure 5 Connector Interconnection and Termination Configuration 8Figure 6 Vehicle Connector Input or Output Isometric View .8Figure 7 Vehicle Connector Face View 9Figure 8 Vehicle Connector Sectioned View A 9Figure 9 Vehicle
9、Connector Sectioned View B 10Figure 10 Vehicle Connector Sectioned View C 10Figure 11 Vehicle Connector Top View . 11Figure 12 Vehicle Connector Side View 11Figure 13 Vehicle Connector Pin Detail View 12Figure 14 Vehicle Connector Construction Notes 13Figure 15 Mating Connector Requirements 14Figure
10、 16 Connector Access . 14Table 1 Vehicle Connector Signal Allocation .61. ScopeThis SAE Recommended Practice details the Physical Layer of the Intelligent Transportation Systems(ITS) Data Bus on CAN (IDB-C), which is generally intended for in-vehicle use. It has been developed by theITS Data Bus (ID
11、B) Physical Layer Subcommittee of the IDB Committee. The objectives of the subcommitteeare to develop information reports, recommended practices and standards concerned with the requirements,design, and usage of devices that communicate electronic signals and control information among ITS relatedcom
12、ponents within the vehicle environment.The IDB-C is a non-proprietary virtual-token passing bus, designed to allow disparate consumer, vehicle, andcommercial electronic components to communicate and share information across a standard, open data bus.This document describes the Physical Layer of the
13、IDB-C, as shown in Figure 1. The Physical Layer of theIDB-C incorporates the CAN 2.0B specification per SAE J2284-2, with modifications as noted in this document.The IDB-C Physical Layer includes the line drivers/receivers, bus topology and termination, and the physicalIDB-C connector. This connecto
14、r is defined only for the IDB-C backbone, and is not intended to define theactual connector on the IDB-C device itself. The usage of this document is not limited to automotive, truck, bus, agriculture, and marine applications.Copyright SAE International Provided by IHS under license with SAENot for
15、ResaleNo reproduction or networking permitted without license from IHS-,-SAE J2366-1 Issued NOV2001-3-FIGURE 1SCOPE OF SAE J2366-12. References2.1 Applicable PublicationsThe following publications form a part of this specification to the extent specifiedherein. Unless otherwise indicated, the latest
16、 version of SAE Publications shall apply. In the event of anyconflicting requirements, this specification shall prevail.2.1.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, or http:/www.sae.org.SAE J2284-2High-Speed CAN (HSC) for Vehicle Applications at 250 Kb
17、psSAE J2366-1LLow Impedance Stereo Audio BusSAE J2590PMODE for In-Vehicle NetworksSAE/USCAR-2Performance Specification for Automotive Connector Systems2.2 Related PublicationsThe following publications are provided for information purposes only and are not arequired part of this document.2.2.1 SAE P
18、UBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, or http:/www.sae.org.SAE J2355ITS Data Bus Architecture Reference Model Information ReportSAE J2366-2ITS Data BusLink LayerSAE J2366-4ITS Data BusThin Transport LayerSAE J2366-7ITS Data BusApplication Message LayerSAE
19、J2366-7XITS Data BusMessage Sets for Device ClassesSAE J2366-7LXITS Data BusIDB LexiconCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J2366-1 Issued NOV2001-4-2.2.2 AMI-C PUBLICATIONSAvailable fro
20、m http:/www.ami-c.org.AMI-C SPEC 1001Release 1 Architecture AMI-C SPEC 1002Functional RequirementsAMI-C SPEC 3001Vehicle Interface Specification Release 1AMI-C SPEC 3002Common Message SetAMI-C SPEC 3003OEM to IDB-C GatewayAMI-C SPEC 4001Physical Specification3. Definitions3.1 CCP (Consumer Convenien
21、ce Port)The CCP is a connector that allows a user to plug portable IDB-Ccomponents into the on-board IDB-C network. The connector specifications are being developed by a jointworking group of the IDB-C Physical Layer subcommittee of the SAE IDB Committee in cooperation with theMobile Electronics Div
22、ision Committee R6 of the Consumer Electronics Association (CEA), and are notprovided in this document.3.2 Embedded IDB-C ComponentThis is used to describe those components that are typically permanentlymounted in the vehicle. These components include those that are installed by the vehicle manufact
23、urer or theuser.3.3 IDB-C Number of DevicesAn IDB-C network is limited to a maximum of 16 physical devices3.4 Portable IDB-C ComponentThis is used to describe those components that are brought to the vehicle bythe user and used temporarily or semi-permanently in the passenger cabin of the vehicle.3.
24、5 Power Mode (PMODE)The Power Mode Signal indicates the power mode of the IDB-C subsystem to allconnected devices. The requirements for the Power Mode signal are defined in SAE J2590, incorporated byreference into this document.3.6 Vehicle ConnectorThis is the standard connector required by this doc
25、ument to be installed on an IDB-Ccomponent. This connector is to be used on embedded IDB-C components.4. Network Speed and Bit TimingThe Data rate of the IDB-C is 250 Kbps. Refer to SAE J2284-2 for CAN bittiming at 250 Kbps.5. Network TopologyThe IDB-C Physical Layer topology is a terminated daisy c
26、hained bus, such that a singlesegment of cable is connected between each component. Each component in the daisy chain has two maleconnectors, which mate to the Vehicle Connector on the incoming and outgoing cables. The male connectorsincorporate a terminating resistor connecting clip, which provides
27、 a means for automatically terminating thenetwork (see 5.2).Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J2366-1 Issued NOV2001-5-FIGURE 2DAISY CHAIN WIRING CONFIGURATION5.1 IDB-C Cable Segments
28、Cable segments incorporate the IDB-C signal set defined in Table 1. These cablesegments contain only standard signals. Any additional circuit requirements by a component must becontained in a separate, unique harness or cable assembly.The total length of an IDB-C daisy chain is calculated as the sum
29、 of the lengths of the individual cablesegments (excluding stubs see 5.3). The maximum total length allowed is defined in SAE J2284-2.5.2 IDB-C TerminationWhen IDB-C components are daisy chained, the end components in the chain are leftwith a single vacant connector, which must provide termination f
30、or the IDB-C data signal pair. Each IDB-Ccomponent connector (M in Figure 2) shall have a resistor connected between the two IDB-C data pins in sucha way that this resistor is disconnected when a cable segment is mated to the component. When the cable isremoved, the resistor is again connected betwe
31、en the two pins. This approach, described further in 6.2 allowsthe last component in a daisy chain to be automatically terminated without user intervention. The bustermination resistor value is defined in SAE J2284-2.5.3 Stubs and the Consumer Convenience Port (CCP)In certain cases, the IDB-C compon
32、ent may beconnected to the IDB-C network via a short drop cable or stub between the component and the female CCP onan adaptor (see Figure 3). This method will be used when a portable device is brought in to the vehicle (notpermanently mounted in the vehicle) and is to be connected to the on-board ID
33、B-C network. The CCP itself isnot defined in this document (see 3.1).The maximum stub length is defined in SAE J2284-2. The stub length is not included in the calculation of themaximum length of the IDB-C daisy chain, and the stub shall not be terminated at the component end. If theadaptor is the la
34、st component in the daisy chain, termination will be provided on the vacant connector on theadaptor, as described in 5.2.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J2366-1 Issued NOV2001-6-FIG
35、URE 3STUBS AND CONSUMER CONVENIENCE PORT (CCP)6. Vehicle ConnectorThis section specifies the connector to be used to implement an IDB-C network in avehicle. Only the header or board mounted (male) side of the connection is defined in this section. All female(harness) connections must mate with this
36、footprint.NOTE In addition to this Vehicle Connector, a Customer Convenience Port is being defined, which willallow portable and other ad hoc components to be connected to the IDB-C network in the vehicle.This Customer Convenience Port will likely be isolated from the IDB-C in the vehicle via an ada
37、ptor.Neither the Customer Convenience Port nor the adaptor is defined in this document.6.1 Vehicle Connector SignalsThe Vehicle Connector is a 12-way connector. The circuits on this connectorare defined in Table 1. 6.1.1 CAN(+) AND CAN()These carry the data signals of the IDB-C on a twisted pair.6.1
38、.2 PMODEThis is the Power Mode signal as defined in SAE J25906.1.3 SPAREThis pin is reserved for future use, and shall not be used.TABLE 1VEHICLE CONNECTOR SIGNAL ALLOCATIONPin # Purpose Pin # Purpose1 CAN () 7 CAN (+)2 PMODE 8 Spare3 Lt Audio () 9 Lt Audio (+)4 Rt Audio () 10 Rt Audio (+)5 Micropho
39、ne () 11 Microphone (+)6 VBatt 12 Ground ()Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J2366-1 Issued NOV2001-7-6.1.4 LT A UDIO(+) AND ()This twisted pair carries the left channel of a stereo a
40、nalog audio program. The use ofthese pins is defined in SAE J2366-1L.6.1.5 RT AUDIO(+) AND ()This twisted pair carries the right channel of a stereo analog audio program. The useof these pins is defined in SAE J2366-1L.6.1.6 MICROPHONE(+) AND ()This twisted pair carries microphone analog audio. The
41、use of these pins isdefined in SAE J2366-1L.6.1.7 VBATT AND GROUNDThese pins carry the primary battery power and provide the Ground return for IDB-Ccomponents. Details are provided in SAE J2590. Grounding for the device electronics and the case must beisolated. In the event of certain ground faults
42、in the vehicle environment, the device electronics and vehiclewiring could be damaged. See Figure 4.FIGURE 4IDB-C GROUNDING REQUIREMENT6.2 Vehicle Connector Configuration and TerminationThe Vehicle Connector provides a terminating resistorconnecting clip, which automatically connects the terminating
43、 resistor whenever there is no mating (female)connector present. The terminating resistor connecting clip is part of the male (header) connector. Theterminating resistor and circuit traces are part of the circuit board or internal wiring of the IDB-C device.Alternative mechanical means of executing
44、the terminating resistor and clip functions are permissible providedthat the terminating resistor is connected between pins 1 and 7 (CAN and CAN +) when the mating femaleplug is removed. Such alternatives shall use the space as described in 6.3 for the terminating resistor clipfunction.Each IDB-C co
45、mponent shall have two connectors (input and output), which are interconnected per Figure 5.The polarization/index features are identical. Both connectors “A” and “B” may be used as either input oroutput. The configuration and connector orientation shown is an example of how the two connectors must
46、beinterconnected the actual circuit layout on a printed circuit board or internal wiring of the component is left tothe component manufacturer.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-SAE J2366-
47、1 Issued NOV2001-8-FIGURE 5CONNECTOR INTERCONNECTION AND TERMINATION CONFIGURATION6.3 IDB-C Connector6.3.1 CONNECTOR TESTINGThe IDB-C male and female connectors shall be tested and shall meet theperformance requirements of SAE/USCAR-2 Performance Specification for Automotive Electrical ConnectorSyst
48、ems. For purposes of this specification, the connector is considered temperature class 1, unsealed,body interior application.The terminating resistor connecting clip shall have a maximum of 20 mW resistance in the closed positionafter conditioning and testing to the Dry Circuit Resistance procedure
49、in SAE/USCAR-2.In the following sub-sections, the physical design and dimensions of the Vehicle Connector are specified.Any notations within the figures as to the “scale” of the diagram should be ignored. Only the specificdimensions indicated are applicable. (Ref. USCAR P/N 064-U-012-2-Z03)6.3.2 ISOMETRIC V IEWSee Figure 6.FIGURE 6VEHICLE CONNECTOR INPUT O
