MIGRATING TO CAN FD
TOMORROW: SELF-DRIVING, CONNECTED VEHICLES Secure, Connected, Self-Driving Cars will save >1,3M road fatalities globally Camera, LiDAR Broadcast Radar Network Big Data ADAS Security Sensor Sensors Fusion Cellular Car access Portable devices 2 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
SPEED AND SECURITY TRANSFORMING CAR NETWORKS • • • • • • • • • • • • • • • 3 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
NXP: OUR POSITION AND OFFERING Leading market from the start, A complete portfolio for present driving all new standards and future networks Focusing on big markets CAN/ LIN Functional Safety (ASIL-D) System • Standard, high-volume functions Basis Chip • Not investing in app-specific • Scalable approach CAN/ LIN Networking – Gen purpose Driven by performance System Basis Chip Integration Level • Power Efficiency, EMC Mini LIN Mini CAN • Functional Safety, robustness System System • From IVN to System solution Basis Chip Basis Chip Support OEM needs >20 Multi-LIN Multi-CAN FlexRay Star 100BASET1 >6B Transceivers Transceivers Couplers Switch 13 LIN CAN FD FlexRay 100BASET1 Transceivers Transceivers Transceivers PHY Communication speed 4 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
CAN with Flexible Datarate: 10x FASTER, MINIMUM EFFORT Sensors / Embedded Control MM / ADAS NXP in the driving seat • 100 M Ethernet Data-rate (bit/s) • Broad-R 10 M Reach FlexRay CAN FD • 1 M CAN • 100 K PSI5 Implementation Cost per Node • LIN 10 K • 5 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
NXP HS-CAN PORTFOLIO SUPPORTING 5MBPS Battery MCU Basic Standby Dual-Standby System voltage 12V 5V IN PRODUCTION IN PRODUCTION IN PRODUCTION Optimised Passenger 3V3 Vehicles Pin 5: VIO IN PRODUCTION IN DEVELOPMENT - SAMPLES: Q3-16 / SOP: Q4-16 Q2-17 Full 24V 5V IN PRODUCTION IN PRODUCTION IN PRODUCTION Support Commercial 3V3 Vehicles Pin 5: VIO IN PRODUCTION IN PRODUCTION Sleep Partial Networking FD-Passive 12V and 24V Support IN PRODUCTION IN PRODUCTION IN PRODUCTION 6 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
7 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
KEY CHALLENGE FOR CAN FD – RINGING ➢ 500kbps bit time = 2000ns 500kbps bit time = 2000ns 80% sample 80% sample point = 1600ns point = 1600ns Differential Signal RxD Signal 8 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
KEY CHALLENGE FOR CAN FD – RINGING ➢ ➢ 2Mbps bit time = 500ns 2Mbps bit time = 500ns 80% sample 80% sample point = 400ns point = 400ns Differential Signal RxD Signal 9 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Assessment Diagram “Receiving Node in Network” • • • • − 5.7 tBit – {112.1 ns … 67.1ns} 4.7 tBit + {44.1 ns … 34.1ns} + 1t Q Not allowed dom Area 0.9V BUS 0.5V Not allowed rec area 10 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
MANAGING RINGING MEANS MAKING TRADE-OFFS • vs. • • 11 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
RINGING SUPPRESSION 12 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
RINGING SUPPRESSION – MARKET REQUIREMENTS 13 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
CiA601-4 Draft Specification • − − 14 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing Suppression Activation by EMC 15 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing not crossing 0V threshold • • • 16 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
CiA601-4 Draft Specification • − − • − − 17 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing Suppression Timing Diagram at 2Mbit/s tbit=500ns (2Mbps) TXD DOMINANT RECESSIVE DOMINANT 50ns 2V sample point @2Mbps V CAN 70% tbit =350ns 1V 500mV 0V t RSC_END =340ns from CiA 601.4 version 1.0.1 working draft t RSC_START =50ns ON 200ns<t RSC_END <340ns 0ns<t RSC_START <50ns RSC OFF 𝑎 𝑈𝑌 − 𝑎 𝑐𝑣𝑡 50,000 − 120 R RECESSIVE Γ = 𝑎 𝑈𝑌 + 𝑎 𝑐𝑣𝑡 = 50,000 + 120 ≈ 1 50k Ω Γ R RSC Z CAN 120 Ω 30 − 120 Γ = 30 + 120 = −0.6 R DOMINANT 30 Ω 63ns 302ns 18 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing Suppression Timing Diagram at 5Mbit/s t BIT =200ns (5Mbps) TXD DOMINANT RECESSIVE DOMINANT 50ns 2V sample point @2Mbps V CAN 70% tbit =140ns 1V 500mV 0V from CiA 601.4 version 1.0.1 working draft t RSC_END =140ns other bitrates: t RSC_START =50ns t RSC_END =0.9*t BIT -40ns=140ns ON t RSC_START <0.5*t BIT =50ns RSC OFF R RECESSIVE 50k Ω R RSC Z CAN 120 Ω R DOMINANT 30 Ω 63ns 102ns 19 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Theoretical Model Ideal transmitter and Transmission lines Ω Ω End Node2a 120 Ω L=X star L=5M L=5M Node1 Node3 L=X Z CAN1 V CANH1 V CANH2 V CANH3 120 Ω 120 Ω 120 Ω 60 Ω 50kΩ V CAN1 V CAN2 V CAN3 Z BUS End V TX1 Node2b 5meter 5meter V CANL1 V CANL2 V CANL3 20 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing Suppression Performance with RSC delay of 70ns 21 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing Suppression Performance with RSC delay of 60ns 22 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing Suppression Performance with RSC delay of 50ns 23 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing Suppression Performance with RSC delay of 40ns 24 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing Suppression Performance with RSC delay of 30ns 25 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing Suppression Performance with RSC delay of 20ns 26 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing Suppression Performance with RSC delay of 10ns 27 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Ringing Suppression Performance with NO RSC DELAY 28 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
CiA601-4 Draft Specification • − − • − − 29 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
CiA601-4 Draft Specification • − − • − − 30 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
CiA601-4 Draft Specification • − − • − − • − − 31 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
CiA601-4 Draft Specification • − − • − − • − − − 32 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Example: Ringing Suppression on TXD CiA Topology – ECU 1 sending with standard HS-CAN transceiver 33 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Example: Ringing Suppression on TXD CiA Topology – ECU 1 sending with NXP FALCON transceiver 34 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Example: Ringing Suppression on TXD CiA Topology – ECU 2 sending with standard HS-CAN transceiver 35 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Example: Ringing Suppression on TXD CiA Topology – ECU 2 sending with NXP FALCON transceiver 36 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Example: Ringing Suppression on TXD CiA Topology – ECU 11 sending with standard HS-CAN transceiver 37 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
Example: Ringing Suppression on TXD CiA Topology – ECU 11 sending with NXP FALCON transceiver 38 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
RINGING SUPPRESSION – SUMMARY • − − • • 39 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
40 MARCH 27, 2017 CONFIDENTIAL AND PROPRIETARY
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