FlexRay Electrical Physical Layer Application Notes Table of contents
Version 3.0.1 October-2010 Page 3 of 69
Table of contents
CHAPTER 1 INTRODUCTION ...................................................................................................................... 5
1.1 Objective ............................................................................................................................................... 5
1.2 References ............................................................................................................................................ 5
1.3 Revision history ..................................................................................................................................... 5
1.4 Terms and definitions ............................................................................................................................ 6
1.5 List of abbreviations .............................................................................................................................. 6
1.6 Notational conventions .......................................................................................................................... 6
1.6.1 Parameter prefix conventions .......................................................................................................... 6
1.6.2 Parameter color conventions ........................................................................................................... 7
CHAPTER 2 APPLICATION NOTES ........................................................................................................... 8
2.1 Application hint: Cable impedance ........................................................................................................ 8
2.2 Application hint: Connectors ................................................................................................................. 9
2.3 Application hint: Split termination ........................................................................................................10
2.4 Application hint: Common mode chokes.............................................................................................11
2.5 Application hint: Exemplary cable shield connection ..........................................................................12
2.6 Application hint: Network topology layout ...........................................................................................13
2.7 Application hint: Termination concepts ...............................................................................................13
2.7.1 Termination concept for point to point connections .......................................................................13
2.7.2 Termination concept for passive star topologies ...........................................................................13
2.7.3 Termination concept for passive linear bus topologies .................................................................13
2.7.4 Termination in hybrid topologies ...................................................................................................13
2.8 Application hint: Passive star - impedance adjustment ......................................................................14
2.9 Application hint: AC busload test ........................................................................................................16
2.10 Application hint: Increased ESD protection.......................................................................................17
2.11 Application hint: Operation at low voltage on V
BAT
............................................................................18
2.12 Application hint: Protocol relevant parameters / Propagation delay .................................................18
2.13 Application hint: Protocol relevant parameters / TSS and Symbol length change ...........................19
2.14 Application hint: Protocol relevant parameters / EMC jitter ..............................................................22
2.14.1 Introduction ..................................................................................................................................22
2.14.2 EMC jitter on data edges .............................................................................................................22
2.14.3 EMC jitter on TSS length .............................................................................................................22
2.14.4 EMC jitter on Symbol length change ...........................................................................................22
2.15 Application hint: Protocol relevant parameters / Echoes ..................................................................23
2.16 Application hint: Protocol relevant parameters / Ringing ..................................................................25
2.17 Application hint: Active star / Wakeup reaction .................................................................................29
2.18 Application hint: Active star / branch recovery ..................................................................................30
2.19 Application hint: Eye-diagram ...........................................................................................................31
2.19.1 Objective ......................................................................................................................................31
2.19.2 Eye-diagrams for different data rates ..........................................................................................31
2.19.3 Capturing method ........................................................................................................................33
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