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 . 7SAE J2366-1 Issued NOV2001-2-6.2 Vehicle Connector Configuration and 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
7、 Construction Notes . 136.3.7 Mating Connector Requirements 13Figure 1 Scope of SAE J2366-1 .3Figure 2 Daisy Chain Wiring Configuration.5Figure 3 Stubs and Consumer Convenience Port (CCP)6Figure 4 IDB-C Grounding Requirement .7Figure 5 Connector Interconnection and Termination Configuration 8Figure
8、6 Vehicle Connector Input or Output Isometric View .8Figure 7 Vehicle Connector Face View 9Figure 8 Vehicle Connector Sectioned View A 9Figure 9 Vehicle Connector Sectioned View B 10Figure 10 Vehicle Connector Sectioned View C 10Figure 11 Vehicle Connector Top View . 11Figure 12 Vehicle Connector Si
9、de View 11Figure 13 Vehicle Connector Pin Detail View 12Figure 14 Vehicle Connector Construction Notes 13Figure 15 Mating Connector Requirements 14Figure 16 Connector Access . 14Table 1 Vehicle Connector Signal Allocation .61. ScopeThis SAE Recommended Practice details the Physical Layer of the Inte
10、lligent 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 (IDB) Physical Layer Subcommittee of the IDB Committee. The objectives of the subcommitteeare to develop information reports, recommended practices an
11、d standards concerned with the requirements,design, and usage of devices that communicate electronic signals and control information among ITS relatedcomponents within the vehicle environment.The IDB-C is a non-proprietary virtual-token passing bus, designed to allow disparate consumer, vehicle, and
12、commercial electronic components to communicate and share information across a standard, open data bus.This document describes the Physical Layer of the 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
13、 this document.The IDB-C Physical Layer includes the line drivers/receivers, bus topology and termination, and the physicalIDB-C connector. This connector 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
14、is not limited to automotive, truck, bus, agriculture, and marine applications.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
15、latest 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
16、250 KbpsSAE 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
17、 SAE PUBLICATIONSAvailable 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 Lay
18、erSAE J2366-7XITS Data BusMessage Sets for Device ClassesSAE J2366-7LXITS Data BusIDB LexiconSAE J2366-1 Issued NOV2001-4-2.2.2 AMI-C PUBLICATIONSAvailable from http:/www.ami-c.org.AMI-C SPEC 1001Release 1 Architecture AMI-C SPEC 1002Functional RequirementsAMI-C SPEC 3001Vehicle Interface Specificat
19、ion Release 1AMI-C SPEC 3002Common Message SetAMI-C SPEC 3003OEM to IDB-C GatewayAMI-C SPEC 4001Physical Specification3. Definitions3.1 CCP (Consumer Convenience Port)The CCP is a connector that allows a user to plug portable IDB-Ccomponents into the on-board IDB-C network. The connector specificati
20、ons are being developed by a jointworking group of the IDB-C Physical Layer subcommittee of the SAE IDB Committee in cooperation with theMobile Electronics Division Committee R6 of the Consumer Electronics Association (CEA), and are notprovided in this document.3.2 Embedded IDB-C ComponentThis is us
21、ed to describe those components that are typically permanentlymounted in the vehicle. These components include those that are installed by the vehicle manufacturer 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
22、 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.3.5 Power Mode (PMODE)The Power Mode Signal indicates the power mode of the IDB-C subsystem to allconnected devices. The requirements for the P
23、ower Mode signal are defined in SAE J2590, incorporated byreference into this document.3.6 Vehicle ConnectorThis is the standard connector required by this document 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
24、 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 chained bus, such that a singlesegment of cable is connected between each component. Each component in the daisy chain has two maleconnectors,
25、 which mate to the Vehicle Connector on the incoming and outgoing cables. The male connectorsincorporate a terminating resistor connecting clip, which provides a means for automatically terminating thenetwork (see 5.2).SAE J2366-1 Issued NOV2001-5-FIGURE 2DAISY CHAIN WIRING CONFIGURATION5.1 IDB-C Ca
26、ble SegmentsCable 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 calculate
27、d as the sum 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 t
28、ermination for 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 con
29、nected between 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
30、IDB-C component 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
31、 on-board IDB-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 theadapt
32、or is the last component in the daisy chain, termination will be provided on the vacant connector on theadaptor, as described in 5.2.SAE J2366-1 Issued NOV2001-6-FIGURE 3STUBS AND CONSUMER CONVENIENCE PORT (CCP)6. Vehicle ConnectorThis section specifies the connector to be used to implement an IDB-C
33、 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 footprint.NOTE In addition to this Vehicle Connector, a Customer Convenience Port is being defined, which willallow portable and other
34、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 adaptor.Neither the Customer Convenience Port nor the adaptor is defined in this document.6.1 Vehicle Connector SignalsThe Vehicle Connect
35、or 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.6.1.2 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.TABL
36、E 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 Microphone () 11 Microphone (+)6 VBatt 12 Ground ()SAE J2366-1 Issued NOV2001-7-6.1.4 LT A UDIO(+) AND ()This twisted pair carries the left cha
37、nnel of a stereo analog 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
38、analog audio. The 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 cert
39、ain ground faults 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 connec
40、ts the terminating 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 m
41、eans of executing 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 clipfunc
42、tion.Each IDB-C component 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 tw
43、o connectors must beinterconnected the actual circuit layout on a printed circuit board or internal wiring of the component is left tothe component manufacturer.SAE J2366-1 Issued NOV2001-8-FIGURE 5CONNECTOR INTERCONNECTION AND TERMINATION CONFIGURATION6.3 IDB-C Connector6.3.1 CONNECTOR TESTINGThe I
44、DB-C male and female connectors shall be tested and shall meet theperformance requirements of SAE/USCAR-2 Performance Specification for Automotive Electrical ConnectorSystems. For purposes of this specification, the connector is considered temperature class 1, unsealed,body interior application.The
45、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 in SAE/USCAR-2.In the following sub-sections, the physical design and dimensions of the Vehicle Connector are specified.Any notat
46、ions 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 OR OUTPUT ISOMETRIC VIEWSAE J2366-1 Issued NOV2001-9-6.3.3 FACE VIEWSee
47、Figure 7.FIGURE 7CONNECTOR FACE VIEW6.3.4 SECTIONED V IEWSSee Figures 8, 9, 10, 11, and 12.FIGURE 8VEHICLE CONNECTOR SECTIONED VIEW ASAE J2366-1 Issued NOV2001-10-FIGURE 9VEHICLE CONNECTOR SECTIONED VIEW BFIGURE 10VEHICLE CONNECTOR SECTIONED VIEW CSAE J2366-1 Issued NOV2001-11-FIGURE 11VEHICLE CONNE
48、CTOR TOP VIEWFIGURE 12VEHICLE CONNECTOR SIDE VIEW 6.3.5 PIN DETAIL VIEWFigure 13 shows the pin detail. All pins and contact area of the terminating resistorconnecting clip in the connector must be precious metal plated as described in Figure 14. Mating female(harness) connector terminals must be pla
49、ted with like or compatible material in their contact area. Theterminating resistor connecting clip shall also be of like plating and shall contact the plated area of the pinwhen in the “closed” position.SAE J2366-1 Issued NOV2001-12-FIGURE 13VEHICLE CONNECTOR PIN DETAIL VIEWSAE J2366-1 Issued NOV2001-13-6.3.6 CONSTRUCTION NOTESFIGURE 14VEHICLE CONNECTOR CONSTRUCTION NOTES6.3.7 MATING CONNECTOR REQUIREMENTSIDB-C device mating connector plugs shall pr
