1、GeneralSpecificationElectric/Electronics GME6718GMLAN Device Test Specification High Speed/Low SpeedNote: This specification may be applied only for current projects. It is Superceded for all futureprojects and replaced by GMW14241.1 Scope 52 References 52.1 External Standards/Specifications 52.2 GM
2、 Group Standards/Specifications 52.3 Additional References 53 Tests and Requirements 63.1 Physical Layer (Dual Wire CAN,GMW3122)63.1.1 CAN Bus Output Voltage Levels 63.1.1.1 Recessive Output Voltage Levels 63.1.1.2 Dominant Output Voltage Levels 73.1.2 Recessive Input Threshold 83.1.2.1 Scope 83.1.2
3、.2 Conditions 83.1.2.3 Test Method 83.1.2.4 Acceptance Criteria 83.1.3 Dominant Input Threshold 83.1.3.1 Scope 83.1.3.2 Conditions 83.1.3.3 Test Method 83.1.3.4 Acceptance Criteria 83.1.4 Internal Resistance of CANH andCANL93.1.4.1 Scope 1 93.1.4.2 Conditions 93.1.4.3 Test Method 93.1.4.4 Acceptance
4、 Criteria 93.1.4.5 Scope 2 93.1.4.6 Conditions 93.1.4.7 Test Method 93.1.4.8 Acceptance Criteria 103.1.4.9 Scope 3 103.1.4.10Conditions 103.1.4.11Test Method 103.1.4.12Acceptance Criteria 103.1.5 Internal Differential Resistor 103.1.5.1 Scope 103.1.5.2 Conditions 103.1.5.3 Test Method 103.1.5.4 Acce
5、ptance Criteria 113.1.6 Min. and Max. Supply Voltage Levelfor Bus Communication113.1.6.1 Scope 113.1.6.2 Conditions 113.1.6.3 Test Method 113.1.6.4 Acceptance Criteria 113.1.7 Standard Engine Start Voltage Curve 113.1.7.1 Scope 113.1.7.2 Conditions 113.1.7.3 Test Method 113.1.7.4 Acceptance Criteria
6、 123.1.8 Signal Rise/Fall Times 123.1.8.1 Scope 123.1.8.2 Conditions 123.1.8.3 Test Method 123.1.8.4 Acceptance Criteria 123.1.9 Signal Characteristics 133.1.9.1 Signal Characteristics (SymmetricLoad)133.1.9.2 SignalCharacteristics (UnsymmetricalLoad)143.1.10 Bit Timing 153.1.10.1Bit Timing Accuracy
7、 during MessageTransmission153.1.10.2Tolerance against Baud RateVariations163.1.11 Fault Tolerant Modes 163.1.11.1Test Immunity to Ground PotentialOffsets163.1.11.2Loss of Ground 173.1.11.3Loss of Supply 183.1.11.4Interruption of CAN Wires 183.1.11.5CAN Wires Shorted to Ground 193.1.11.6CAN Wires Sh
8、orted to Supply 193.1.11.7Shortcut between CANH and CANL 193.1.12 Internal Delay 193.1.12.1Scope 203.1.12.2Conditions 203.1.12.3Test Method 203.1.12.4Acceptance Criteria 203.1.13 ESD Protection 213.1.13.1Scope 21 Copyright 2007 General Motors Corporation All Rights ReservedPublication Department: GM
9、E Specification CenterJune 2007 - Issue No. 2 Page 1 of 78PRD045 - VPRE ST 1 10/03GME6718 GM EUROPE ENGINEERING STANDARDS3.1.13.2Conditions 213.1.13.3Test Method 213.1.13.4Acceptance Criteria 213.2 Physical Layer (Single Wire CAN,GMW3089)223.2.1 Device Unit Load 223.2.1.1 Device Resistance 223.2.1.2
10、 Device Capacitance 223.2.2 Bus Dominant Output Voltage Level 223.2.2.1 Signal Voltage Level in Normal Mode 223.2.2.2 Signal Voltage Level in High-speedMode263.2.2.3 Signal Voltage Level in Wakeup Mode 263.2.3 Bus Recessive or Passive State LowVoltage263.2.3.1 Bus Recessive or Passive State LowVolta
11、ge in Normal Mode263.2.3.2 Bus Recessive or Passive State LowVoltage in High-speed Mode263.2.3.3 Bus Recessive or Passive State LowVoltage in Wakeup Mode263.2.4 Input Threshold 273.2.4.1 Input Threshold in Normal Mode 273.2.4.2 Dominant Input Threshold in WakeupMode273.2.5 Supply Voltage Levels 283.
12、2.5.1 Scope 283.2.5.2 Conditions 283.2.5.3 Test Method 283.2.5.4 Acceptance Criteria 283.2.6 Behavior During Crank 283.2.6.1 Scope 283.2.6.2 Conditions 283.2.6.3 Test Method 283.2.6.4 Acceptance Criteria 293.2.7 Signal Rise/Fall Time 293.2.7.1 Scope 293.2.7.2 Conditions 293.2.7.3 Test Method 293.2.7
13、.4 Acceptance Criteria 293.2.8 Internal Delay 313.2.8.1 Scope 313.2.8.2 Conditions 313.2.8.3 Test Method 313.2.8.4 Acceptance Criteria 323.2.9 Signal Characteristics 323.2.9.1 Scope 323.2.9.2 Conditions 323.2.9.3 Test Method 323.2.9.4 Acceptance Criteria 323.2.10 Bit Timing 343.2.10.1Bit Timing Accu
14、racy during MessageTransmission343.2.10.2Tolerance against Baud RateVariations343.2.11 Fault Tolerant Modes 353.2.11.1Test Immunity to Ground PotentialOffsets353.2.11.2Test Immunity to Battery Offsets 353.2.11.3Loss of Power Supply 363.2.11.4Temporary Loss of Power Supply 363.2.11.5Bus Short to Grou
15、nd 363.2.11.6Bus Short to Battery 373.2.11.7Loss of Ground Connection 373.2.12 ESD Protection 383.2.12.1Scope 383.2.12.2Conditions 383.2.12.3Test Method 383.2.12.4Acceptance Criteria 383.3 Data Link Layer 383.3.1 CAN Protocol Conformance 383.3.1.1 Scope 383.3.1.2 Conditions 383.3.1.3 Test Method 383
16、.3.1.4 Acceptance Criteria 383.3.2 Extended Format Frame (CAN 2.0BPassive) Compatibility383.3.2.1 Scope 383.3.2.2 Conditions 383.3.2.3 Test Method 383.3.2.4 Acceptance Criteria 383.3.3 Bus Load 383.3.3.1 Bus Max. Load Test 383.3.3.2 Burst Test 393.3.3.3 Peak Load Test 393.3.3.4 Receive Capability 39
17、3.4 Application Interface 403.4.1 Application Message Transmission 403.4.1.1 Remote VN Activation 403.4.1.2 VN Activation by the DUT 403.4.1.3 Deactivation of VNs 403.4.2 Message Transmission Times 403.4.2.1 Periodic Messages 403.4.2.2 Event Messages 413.4.2.3 Periodic with Event Messages 423.4.3 Im
18、plementation of correct DataLength Code (DLC)433.4.3.1 Scope 433.4.3.2 Conditions 433.4.3.3 Test Method 433.4.3.4 Acceptance Criteria 433.5 Node Management 443.5.1 Node Supervision and Error Detection(LSCAN)443.5.1.1 Bus Off Recovery Delay Time 44 Copyright 2007 General Motors Corporation All Rights
19、 ReservedPage 2 of 78 Issue No. 2 - June 2007PRD045 - VPRE ST G 10/03GM EUROPE ENGINEERING STANDARDS GME67183.5.1.2 “CAN Bus CommunicationMalfunction” DTC453.5.2 Node Supervision and Error Detection(HSCAN)453.5.2.1 Bus Off Recovery Delay Time 453.5.2.2 CAN Bus CommunicationMalfunction DTC453.5.3 Nod
20、e Activation (HSCAN) 463.5.3.1 Scope 463.5.3.2 Conditions 463.5.3.3 Test Method 1 463.5.3.4 Test Method 2 463.5.3.5 Acceptance Criteria 463.5.4 Node Deactivation (HSCAN) 463.5.4.1 Scope 463.5.4.2 Conditions 463.5.4.3 Test Methods 463.5.4.4 Acceptance Criteria 463.6 Network Management 463.6.1 VNMF (C
21、ontent, Timing) 463.6.1.1 VN Identifier Bits 463.6.1.2 Initialize/Continue Indication 473.6.1.3 VNMF Periodic Transmission Interval 473.6.2 VN Activation 483.6.2.1 Remote VN Activation (via HVWU values see Table 5) shallbe used. All wire lengths shall be 16V.3.2.4.1.4 Acceptance Criteria. The DUT sh
22、allnot stop the transmission of its frames in case thatVdiff 2 V. The DUT shall stop to transmit its framesin case that Vdiff 2.2 V.Figure 20: Input Threshold Test Circuit3.2.4.2 Dominant Input Threshold in WakeupMode.3.2.4.2.1 Scope. Measure the dominant inputthreshold of the DUT in HVWU mode.3.2.4
23、.2.2 Conditions. The test circuit according toFigure 21 shall be used. The DUT is in sleep mode.Set the voltage V to 0 V. RL = 220 .3.2.4.2.3 Test Method. Increase the voltage V insteps of 0.1 V and create a short pulse (e.g. 30 ms)on the CAN bus by closing the switch and checkthe behavior of the DU
24、T with the help of an oscillo-scope. Measure the voltage level between CANHand ground.Perform the test at the following values for Ubatt: 6 V,9 V, 12 V, 14 V, 16 V, 18 V and 26.5 V.3.2.4.2.4 Acceptance Criteria. See Table 7 forrequired wakeup input threshold voltage levels.Note 3: Please refer to th
25、e appropriate component specifications and check whether 18 V and 26.5 V are required. Copyright 2007 General Motors Corporation All Rights ReservedJune 2007 - Issue No. 2 Page 27 of 78PRD045 - VPRE ST U 10/03GME6718 GM EUROPE ENGINEERING STANDARDSFigure 21: HVWU Input Threshold Test Circuit3.2.5 Su
26、pply Voltage Levels.3.2.5.1 Scope. Determine the min. supply voltagelevel threshold for a correct bus communication.3.2.5.2 Conditions. Set up a physical network, con-sisting of the DUT and a test tool. The test tool is ableto simulate all nodes that are necessary for a normalbus communication of th
27、e DUT.3.2.5.3 Test Method. Set the supply voltage of theDUTto18V.Decrease the supply voltage of the DUT in steps of0.1 V with a speed of 1 min per step.Check the bus communication and measure the low-est supply voltage level with no communication prob-lems.Increase the supply voltage of the DUT in s
28、teps of0.1 V with a speed of 1 min per step and check whenthe DUT starts with the transmission of its messagesagain.3.2.5.4 Acceptance Criteria. The DUT shall be ableto transmit and receive frames within the supply volt-age range of (6.0.18) V (unless otherwise speci-fied in the applicable SSTS or C
29、TS). The DUT shallresume its operation within 300 ms, after the supplyvoltage returned to a level 6.5 V. In addition theDUT shall withstand a supply voltage of 18 V for 1 hand 26.5 V for 1 min without any damage (unless oth-erwise specified in the applicable SSTS or CTS).3.2.6 Behavior During Crank.
30、3.2.6.1 Scope. Test, if the startup procedure isexecuted correctly during voltage drops (e.g. enginestart).3.2.6.2 Conditions. Set up a physical network, con-sisting of the DUT and a test tool. The test tool is ableto simulate all nodes that are necessary for a normalbus communication of the DUT.3.2
31、.6.3 Test Method. Apply test pulse No. 4 of theGMW3097, severity level IV, to the supply voltage Copyright 2007 General Motors Corporation All Rights ReservedPage 28 of 78 Issue No. 2 - June 2007PRD045 - VPRE ST G 10/03GM EUROPE ENGINEERING STANDARDS GME6718lines of the DUT. The test tool simulates
32、a correctreaction of the other nodes on the messages from theDUT.3.2.6.4 Acceptance Criteria. Communication dis-turbances caused by the DUT during the pulse dura-tion are not acceptable: The DUT shall not send errorframes or frames with wrong content.The DUT shall be able to transmit and receive fra
33、mesat a supply voltage of 6.0 V.The DUT shall resume its operation within 300 ms,after the supplyvoltage returns to a level 6.5 V with-out any operator intervention.3.2.7 Signal Rise/Fall Time.3.2.7.1 Scope. Determine the recessive to dom-inant and dominant to recessive transition time ofthe SWCAN s
34、ignal in normal speed, high speedand wakeup mode. Check, whether the measuredrise-/fall times are within the GMLAN Physical Layerspecification.3.2.7.2 Conditions. A test circuit according to Fig-ure 22 (including capacitors) shall be used. All wirelengths shall be 1.0 m. The signals are measuredunde
35、r max. and min. physical load conditions (seeTable 9 and Table 10).3.2.7.3 TestMethod. Measure thesignalriseandfalltimes under the given conditions with an oscilloscopeand add the plots to the test report.3.2.7.4 Acceptance Criteria. The measured rise-/fall times shall be within the following time l
36、imits (seeTable 8):Table 8: Acceptance Criteria Rise/Fall TimesMode Baud ratein kbit/sRise timein sFall timein sNormal Mode 33.33 1.5 .4.73 1.35.7.5Wakeup at 0.35 % clock tolerance 33.33 1.5.4.73 1.35.10.5Wakeup at 0.5 % clock tolerance 33.33 1.5.4.73 1.35 .9.53High-Speed Mode 83.33 75 ns.1.28 s 30
37、ns.2.25 sFigure 22: Electrical Connection between DUT and Test Tool Copyright 2007 General Motors Corporation All Rights ReservedJune 2007 - Issue No. 2 Page 29 of 78PRD045 - VPRE ST U 10/03GME6718 GM EUROPE ENGINEERING STANDARDSFigure 23: SWCAN Rise and Fall Time DefinitionRise time: From recessive
38、 to dominant state tran-sition time.Fall time: From dominant to recessive state tran-sition time.Table 9: SWCAN Capacitor Loads for Normal and Wakeup ModeNo. ofadditional nodes Rload network =1:Cload network=3.6:Cload(Note 4) network =4:Cload (Note 5)1 6600 150 pF 820 pF 1 nF31 220 4.7 nF 17.2 nF 19
39、 nFExample for ECUs with a 0.35 % clock tolerance:Min. load: Rload = 6600 Cload = 100 pF at network =1 Cload = 820 pF at network = 3.6Max. load: Rload = 220 Cload = 4.7 nF at network =1 Cload = 17.2 nF at network = 3.6Table 10: SWCAN Capacitor Loads for High-speed ModeNo. ofadditional nodes Rload ne
40、twork =1:Cloadnetwork =3.6:Cload(Note 4) network =4:Cload (Note 5)1 120 150 pF 820 pF 1 nF31 82 4.7 nF 17.2 nF 19 nFNote 4: For ECUs with a clock tolerance of 0.5 %.Note 5: For ECUs with a clock tolerance of 0.35 %. Copyright 2007 General Motors Corporation All Rights ReservedPage 30 of 78 Issue No. 2 - June 2007PRD045 - VPRE ST G 10/03
