SAE J 2590-2001 PMODE for In-Vehicle Networks《汽车电子网络PMODE》.pdf

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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 15096-0001RECOMMENDEDPRACTICEJ2590ISSUEDDEC2001Issued 2001-12PMODE for In-Vehicle NetworksTABLE OF CONTENTS1. Scope . 32. References . 32.1 Appli

4、cable Publications 32.1.1 SAE Publications 32.1.2 AMI-C Publications. 32.1.3 ISO Publications . 32.2 Related Publications . 32.2.1 SAE Publications 32.2.2 AMI-C Publications. 43. Definitions. 43.1 AMI . 43.2 AMI-C . 43.3 AMI Connector . 43.4 Consumer Convenience Port . 43.5 HMI. 43.6 IEEE . 43.7 MOS

5、T . 43.8 OEM . 43.9 PMODE 43.10 Selective Wake-up . 43.11 Timing Parameters . 43.11.1 Toff_min PMODE On-to-Off Delay Timer 43.11.2 Ton_min PMODE Off-to-On Delay Timer 43.11.3 Tnode_off Node Turn OFF Timer . 43.11.4 Tsel_wakeup Network Selective Wake-up Pulse 43.12 VBatt. 43.13 Vehicle Services Inter

6、face 53.14 Vehicle Services Interface Connector 5SAE J2590 Issued DEC2001-2-4. Power Management 54.1 Vehicle Power Characteristics 54.2 Power and Ground Requirements 64.2.1 Interface Component 64.2.2 Power Pin .64.2.3 Ground Circuit.64.3 Power Consumption .74.3.1 ACTIVE (Normal Operation) State74.3.

7、2 SLEEP State.74.3.3 INACTIVE State74.4 Active Power Consumption Management .74.4.1 Management Mechanisms74.4.2 Power Terminal is Hot at All Times .74.5 Power States 74.5.1 System Power States and Static Ignition Key Positions .74.5.2 Power State Transitions During Typical Ignition Key Operation .84

8、.5.3 Ignition Switch Rotation and Power Interruption .84.5.4 Power State Transitions from OFF to ON.84.5.5 Power State Transitions from ON to OFF .94.6 Power Modes94.7 Power Mode Implementations 104.8 PMODE Operation 104.8.1 PMODE Change from ON to OFF State. 114.8.2 PMODE Change from OFF to ON Stat

9、e. 114.8.3 OEM Specific Signals . 114.8.4 Selective Wake-Up . 114.9 PMODE Signal Control . 124.9.1 PMODE Controlled from Vehicle Services Interface. 124.9.2 Control Sources to Switch PMODE ON 124.9.3 Optional Signal Sources to Switch PMODE ON . 124.9.4 Control Sources to Switch PMODE OFF 124.9.5 Opt

10、ional Signals Used to Switch PMODE OFF 124.10 Long-Term Shut Down 134.11 PMODE Signal 134.11.1 PMODE Signal Generation and Detection 13Appendix A Example PMODE Circuit 16A.1 General .16A.2 Circuit Operation .17A.2.1 Protection Circuits. 17A.2.2 PMODE Detector Circuit . 17A.2.3 PMODE Generator Circui

11、t 18Figure 1 Typical Automotive Power Characteristics5Figure 2 Extended Power Supply .6Figure 3 Power State Transitions from OFF to RUN.8Figure 4 Power State Transitions from ON to OFF and ON-OFF-ON.9Figure 5 Power Usage in Component Subsystems 10Figure 6 Basic PMODE Signal Generation and Detection

12、Circuit.14Figure A1 Example PMODE Circuit 16SAE J2590 Issued DEC2001-3-Table 1 System Power States .7Table 2 Power State Transitions8Table 3 PMODE Signal Levels 13Table 4 PMODE Signal DC Output Characteristics .15Table 5 PMODE Signal DC Input Characteristics 15Table 6 Timing Characteristics PMODE Si

13、gnal 15Table A1 Network Signal Descriptions. 17Table A2 Component Signal Descriptions . 171. ScopeThis SAE Recommended Practice describes the power mode requirements for in-vehicle networksthat conform to the Automotive Multimedia Interface Collaboration (AMI-C) specifications. These networksinclude

14、, but are not limited to, the IDB-C (SAE J2366), IDB-1394, and MOST.This version of the document covers primarily IDB-C and may be revised when the PMODE requirements forthe other networks are more fully developed by AMI-C.2. References2.1 Applicable PublicationsThe following publications form a par

15、t of this specification to the extent specifiedherein. Unless otherwise indicated, the latest version of SAE publications shall apply.2.1.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, or http:/www.sae.org.SAE J1113-11Immunity to Conducted Transients on Powe

16、r LeadsSAE J2366-1ITS Data BusPhysical LayerSAE J2366-2ITS Data BusLink Layer2.1.2 AMI-C DOCUMENTSAvailable from the AMI-C web site: http:/www.ami-c.orgAMI-C Spec 3001Vehicle Interface Specification Release 1AMI-C Spec 3003OEM to IDB-C GatewayAMI-C Spec 30041394 to IDB-C GatewayAMI-C Spec 3005MOST t

17、o IDB-C Gateway2.1.3 ISO DOCUMENTSAvailable from the ISO or ANSIISO/CD-16750-2Road vehiclesEnvironmental conditions and testing for electrical and electronicequipmentPart 2: Electrical loads2.2 Related PublicationsThese documents further contribute to the understanding of the context of thisstandard

18、.2.2.1 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 J2366-4ITS Data BusThin Transport LayerSAE J2366-7ITS Data BusApplication Message LayerSAE J2366-7XITS Data BusM

19、essage Sets for Device ClassesSAE J2366-7LXITS Data BusIDB LexiconSAE J2590 Issued DEC2001-4-2.2.2 AMI-C PUBLICATIONSAvailable from the AMI-C web site: http:/www.ami-c.orgAMI-C Spec 1001Release 1 Architecture AMI-C Spec 1002Functional RequirementsAMI-C Spec 3002Common Message SetAMI-C Spec 1004AMI-C

20、 Release 1 Message-Level SecurityAMI-C Ref Doc 1003AMI-C Use Cases3. Definitions3.1 AMIAutomotive Multimedia Interface the general term used to identify all interfaces defined by AMI-C.3.2 AMI-CAutomotive Multimedia Interface Collaboration a non-profit corporation established by automotivemanufactur

21、ers to adopt or develop standards for multimedia interfaces to vehicles.3.3 AMI ConnectorThe connector to which an AMI-C compliant OEM or embedded (permanently installed)component is connected.3.4 Consumer Convenience PortThe connector through which portable or other ad-hoc components areconnected t

22、o the network. 3.5 HMIHuman Machine Interface used to define any user / driver interface mechanism.3.6 IEEEInstitute of Electrical and Electronic Engineers3.7 MOSTMedia Oriented System Transport optical fiber-based multimedia and control networkingtechnology.3.8 OEMOriginal Equipment Manufacturer in

23、 this document the term OEM is used to describe a vehiclemanufacturer.3.9 PMODEThe Power Mode signal the subject of this document.3.10 Selective Wake-upA process by which only certain components on the network are activated when thePower state is OFF.3.11 Timing Parameters3.11.1 Toff_min PMODE ON-TO

24、-OFF DELAY TIMERThe time that starts with the detection of a condition thatwarrants signaling of the Power OFF state and the actual transition of the PMODE signal to OFF. Toff_min =500 ms.3.11.2 Ton_min PMODE OFF-TO-ON DELAY TIMERThe time that starts with the detection of a condition thatwarrants si

25、gnaling of the Power ON state and the actual transition of the PMODE signal to ON. Ton_min =1000 ms.3.11.3 Tnode_off NODE TURN OFF TIMERThe maximum time that a component is allowed to continue to beACTIVE after PMODE changes from ON to OFF. T node_off = 60 S.3.11.4 Tsel_wakeup NETW ORK SELECTIVE WAK

26、E-UP PULSEThe time period for which a component asserts thePMODE signal (from the OFF state to the ON state and back to the OFF state) to request a Selective Wake-up. Tsel_wakeup = 250-500 ms.3.12 VBattUnconditioned vehicle battery voltage. VBatt_Max = maximum value of VBatt = 16 V DCSAE J2590 Issue

27、d DEC2001-5-3.13 Vehicle Services InterfaceThe component on the network that is responsible for the primary control of thePMODE signal.3.14 Vehicle Services Interface ConnectorThe connector provided by the vehicle manufacturer through whichthe network is supplied with power and negative ground circu

28、its.4. Power Management4.1 Vehicle Power CharacteristicsThe following typical values are provided for clarification only. For specificvalues, refer to ISO/CD 16750-2.a. It is expected that AMI-C compliant components will operate using a standard 12 V automotive powersupply. This document does not co

29、ver any future 42 V requirements or specifications. b. Typical system voltage range during normal operation and engine running above idle speeds is 11.5 to16 V.c. Typical voltage range during engine cranking (starter engaged) is 5 to 9 V. The lowest voltage occursduring low temperature extreme or du

30、ring low battery state-of-charge.d. Transient voltage peaks during alternator load dump can be between +80 to 200 V.e. Transient voltage peaks during load switching from 100 to 300 V.f. Typical voltage during battery jump-start ranges between 12 and 24 V.g. Typical voltage during reverse battery con

31、nector (service error) ranges between 8 to 12 V, but couldbe greater. Actual negative voltage will depend on several factors, including the ability of the battery toaccept charge. A dead battery could allow system voltage to be greater than 12 V.Figure 1 shows the previous in graphical form.FIGURE 1

32、TYPICAL AUTOMOTIVE POWER CHARACTERISTICSSAE J2590 Issued DEC2001-6-4.2 Power and Ground RequirementsThis section describes and specifies several aspects of the automotivepower supply system to achieve interchangeability among the wide variety of electrical and electroniccomponents required to operat

33、e in the AMI-C compliant system. This section covers power and groundcircuits and circuit voltage offsets.NOTE Self-powered components (e.g., internal battery-driven) that are not connected to the vehicleselectrical subsystem or to the AMI Interface Connector Power and Ground pins may be used.4.2.1

34、INTERFACE COMPONENTAn AMI-C compliant vehicle is only required to have one component the AMI-CVehicle Services Interface. It is assumed that this component will provide the required power for thecomponents connected to the network. The Vehicle Services Interface shall be capable of sourcing at least

35、10.5 V DC at 5 A to the network.4.2.2 POWER PINAn AMI-C compliant component can draw limited power from the power pin of its AMIConnector. a. A component shall be capable of operating with a VBatt of 8-16 V DC (see ISO 16750 for furtherdetails).b. The maximum internal current draw from the power pin

36、 of any connector comprising the AMIConnector set is limited to 0.5 A for each component. Current requirements of a component thatexceed this maximum amount must be provided through a separate connector and separately fusedcircuit.c. Systems with a total current requirement of more than the 5.0 A cu

37、rrent draw on an AMI Connectorrequire a break in the series circuit and a second power source inserting an additional 5.0 A supply(see Figure 2). This provides an extension of the daisy-chained power circuit to an additional 10components.FIGURE 2EXTENDED POWER SUPPLY4.2.3 GROUND CIRCUITThe Ground ci

38、rcuit of the AMI Interface Connector set sinks current from the componentsback to negative ground. The maximum current returned to negative ground via each AMI Connector shallbe 0.5 A.Electrical grounding of components shall preclude ground loops and high current flow from affecting normalsystem ope

39、ration.Components having secondary connectors providing power to them must use isolated negative groundreturn lines for those circuits back to a single common point in the vehicle. This secondary negative groundreturn must also be isolated within the component from the Vehicle Services Interface gro

40、und.SAE J2590 Issued DEC2001-7-4.3 Power ConsumptionComponents may have three levels of power consumption:4.3.1 ACTIVE (NORMAL OPERATION) STATEComponents do not have a restriction on total current usage in normaloperation, providing they meet all of the other requirements of the power supply system

41、defined in 4.2.4.3.2 SLEEP S TATEDuring the SLEEP (inactive) state, current consumption must be less than 0.1 mA percomponent, unless the component contains a function that remains active during SLEEP, such as a wirelesstransceiver. Components that use transceivers (e.g., cell phone, wireless, etc.)

42、 shall draw less than 2.0 mAin the SLEEP state. 4.3.3 INACTIVE STATEIn the INACTIVE state all internal functions have ceased. A component in the INACTIVEstate is generally disconnected from the power sources or the internal power supply has been shut off.Current draw in the INACTIVE state shall not

43、exceed 0.05 mA.4.4 Active Power Consumption Management4.4.1 MANAGEMENT MECHANISMSThe AMI system supports three methods to manage current consumption.These methods allow a vehicle to remain standing in a parking lot for several weeks without discharging thebattery to a point that it will not start th

44、e vehicle: a. The first method allows components, during the Power OFF state, to go into a SLEEP state thatreduces the normal component power consumed to a very low level. Some internal circuitry mayremain active while in this SLEEP state to provide some function during a normal Power OFF state.b. A

45、 second method allows components to stay active after the ignition key is turned off to perform avariety of functions. The components then turn themselves off, by switching off the internal powersupply or going to SLEEP, when the tasks are completed or after a pre-determined time.c. The third method

46、 switches off all power to the AMI system after a predefined period of inactivity. Thisfeature is intended for extended periods in parking lots, distribution centers and storage facilities. Oneexample of an implementation is a two-week timer to shut off a latching relay in the Power Supply Line.This

47、 function would be a service provided by the Vehicle Services Interface component with the timeduration defined by the OEM. Vehicle Services Interface components not using this feature providecontinuous power to the Power Supply Line at all times.4.4.2 POWER TERMINAL IS HOT AT ALL T IMESThe power te

48、rminal of the AMI Connector is at battery voltagepotential at all times (except during long storage periods, as described in 4.4.1). This allows AMIcomponents to remain powered independent of the ignition key position and the Power state.4.5 Power StatesSystem power states (ON or OFF) are establishe

49、d from the vehicle ignition switch position.The order of the functional positions on the switch is assumed to be one of two arrangements: In clockwiseorder, ACC, OFF, RUN, START, or OFF, ACC, RUN, START, depending on the manufacturer. It is alsoassumed that an AMI-C compliant system would be normally powered when the ignition switch is in the ACCposition.4.5.1 SYSTEM POWER STATES AND STATIC IGNITION KEY POSITIONSTable 1 shows the relationship betweenignition position and Pow