MIGRATING TO CAN FD TOMORROW: SELF-DRIVING, CONNECTED VEHICLES - - PowerPoint PPT Presentation

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MIGRATING TO CAN FD TOMORROW: SELF-DRIVING, CONNECTED VEHICLES - - PowerPoint PPT Presentation

Mar 01, 2024 513 likes •933 views

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

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MIGRATING TO CAN FD

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2 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

TOMORROW: SELF-DRIVING, CONNECTED VEHICLES

Big Data Cellular Radar Car access Sensors ADAS Sensor Fusion Camera, LiDAR

Secure, Connected, Self-Driving Cars will save >1,3M road fatalities globally

Broadcast Network Portable devices Security

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3 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

SPEED AND SECURITY TRANSFORMING CAR NETWORKS

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4 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Leading market from the start, driving all new standards

NXP: OUR POSITION AND OFFERING

>6B 13 >20

A complete portfolio for present and future networks

CAN/ LIN Networking – Gen purpose System Basis Chip Mini LIN System Basis Chip Multi-LIN Transceivers LIN Transceivers Mini CAN System Basis Chip Multi-CAN Transceivers CAN FD Transceivers FlexRay Star Couplers FlexRay Transceivers 100BASET1 Switch 100BASET1 PHY

Integration Level

Communication speed

Focusing on big markets Driven by performance

  • Standard, high-volume functions
  • Not investing in app-specific
  • Scalable approach
  • Power Efficiency, EMC
  • Functional Safety, robustness
  • From IVN to System solution

Support OEM needs

CAN/ LIN Functional Safety (ASIL-D) System Basis Chip

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5 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

CAN with Flexible Datarate: 10x FASTER, MINIMUM EFFORT

Implementation Cost per Node Data-rate (bit/s)

10 K 100 K 1 M 10 M 100 M

PSI5 LIN CAN CAN FD FlexRay Ethernet Broad-R Reach

Sensors / Embedded Control MM / ADAS

  • NXP in the driving seat
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6 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Battery System MCU voltage 12V and 24V Support

IN PRODUCTION IN PRODUCTION IN PRODUCTION IN PRODUCTION IN PRODUCTION

Sleep Partial Networking FD-Passive

Full 24V Support

Commercial Vehicles

5V

IN PRODUCTION IN PRODUCTION IN PRODUCTION

3V3

Pin 5: VIO

IN PRODUCTION

3V3

Pin 5: VIO

IN PRODUCTION IN DEVELOPMENT - SAMPLES: Q3-16 / SOP: Q4-16

Basic Standby Dual-Standby

12V Optimised

Passenger Vehicles

5V

IN PRODUCTION IN PRODUCTION

NXP HS-CAN PORTFOLIO SUPPORTING 5MBPS

Q2-17

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7 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

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8 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

➢

500kbps bit time = 2000ns

KEY CHALLENGE FOR CAN FD – RINGING

RxD Signal

80% sample point = 1600ns

500kbps bit time = 2000ns

Differential Signal

80% sample point = 1600ns

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9 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

➢ ➢

2Mbps bit time = 500ns

KEY CHALLENGE FOR CAN FD – RINGING

RxD Signal

80% sample point = 400ns

Differential Signal

80% sample point = 400ns

2Mbps bit time = 500ns

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10 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Assessment Diagram “Receiving Node in Network”

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Not allowed Area Not allowed area BUS

rec dom 0.5V 0.9V

5.7 tBit – {112.1ns … 67.1ns} 4.7 tBit + {44.1ns … 34.1ns} + 1tQ

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11 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

MANAGING RINGING MEANS MAKING TRADE-OFFS

vs.

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12 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

RINGING SUPPRESSION

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13 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

RINGING SUPPRESSION – MARKET REQUIREMENTS

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14 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

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CiA601-4 Draft Specification

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15 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Ringing Suppression Activation by EMC

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16 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

  • Ringing not crossing 0V threshold
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17 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

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CiA601-4 Draft Specification

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18 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Ringing Suppression Timing Diagram at 2Mbit/s

DOMINANT RECESSIVE

TXD VCAN ZCAN

RDOMINANT 30Ω

DOMINANT

2V 0V 500mV tbit=500ns (2Mbps)

RRECESSIVE 50kΩ

RSC

OFF ON tRSC_START=50ns

RRSC 120Ω

1V 63ns 50ns tRSC_END=340ns

sample point @2Mbps 70% tbit =350ns

302ns from CiA 601.4 version 1.0.1 working draft 200ns<tRSC_END<340ns 0ns<tRSC_START<50ns

Γ =

𝑎𝑈𝑌 − 𝑎𝑐𝑣𝑡 𝑎𝑈𝑌 + 𝑎𝑐𝑣𝑡 = 50,000 − 120 50,000 + 120 ≈ 1

Γ =

30 − 120 30 + 120 = −0.6

Γ

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19 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

DOMINANT RECESSIVE

TXD VCAN ZCAN

RDOMINANT 30Ω

DOMINANT

2V 0V 500mV tBIT=200ns (5Mbps)

RRECESSIVE 50kΩ

RSC

OFF ON

RRSC 120Ω

1V 63ns 50ns tRSC_END=140ns

sample point @2Mbps 70% tbit =140ns

102ns from CiA 601.4 version 1.0.1 working draft

  • ther bitrates:

tRSC_END=0.9*tBIT-40ns=140ns tRSC_START<0.5*tBIT=50ns tRSC_START=50ns

Ringing Suppression Timing Diagram at 5Mbit/s

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20 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Theoretical Model

Ideal transmitter and Transmission lines

Ω Ω 

60Ω VCANH2 VCANL2 ZCAN1 VTX1 ZBUS VCAN2 120Ω VCANH1 VCANL1 VCAN1 120Ω VCANH3 VCANL3 VCAN3 5meter 5meter 50kΩ

Node1 Node3

L=5M

End Node2b End Node2a 120Ω 120Ω

star

L=X L=5M L=X

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21 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Ringing Suppression Performance with RSC delay of 70ns

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22 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Ringing Suppression Performance with RSC delay of 60ns

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23 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Ringing Suppression Performance with RSC delay of 50ns

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24 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Ringing Suppression Performance with RSC delay of 40ns

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25 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Ringing Suppression Performance with RSC delay of 30ns

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26 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Ringing Suppression Performance with RSC delay of 20ns

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27 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Ringing Suppression Performance with RSC delay of 10ns

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28 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Ringing Suppression Performance with NO RSC DELAY

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29 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

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CiA601-4 Draft Specification

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30 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

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CiA601-4 Draft Specification

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31 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

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CiA601-4 Draft Specification

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32 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

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CiA601-4 Draft Specification

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33 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Example: Ringing Suppression on TXD

CiA Topology – ECU 1 sending with standard HS-CAN transceiver

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34 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Example: Ringing Suppression on TXD

CiA Topology – ECU 1 sending with NXP FALCON transceiver

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35 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Example: Ringing Suppression on TXD

CiA Topology – ECU 2 sending with standard HS-CAN transceiver

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36 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Example: Ringing Suppression on TXD

CiA Topology – ECU 2 sending with NXP FALCON transceiver

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37 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Example: Ringing Suppression on TXD

CiA Topology – ECU 11 sending with standard HS-CAN transceiver

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38 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

Example: Ringing Suppression on TXD

CiA Topology – ECU 11 sending with NXP FALCON transceiver

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39 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017

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  • RINGING SUPPRESSION – SUMMARY
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40 CONFIDENTIAL AND PROPRIETARY MARCH 27, 2017