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LIN

SUBMITTED BY

JAMSHEER K

03/09/10

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An Overview

LIN CONCEPT FEATURES OF LIN

LIN MESSAGE FRAME

LIN COMMUNICATION

ADVANTAGES

REFERENCES

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TECHNICAL SOLUTION

Low cost single-wire implementation

Speed up to 20Kbit/s Single Master / Multiple Slave Concept

Low cost silicon implementation

UART/SCI interface Self synchronization

LIN Concept

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Lin Vs other Automotive Bus

Speed[

bit/s]

LINmaster-slave

single wire busno quartz

CAN-Bevent triggeredfault tolerant

dual wire

CAN-Cevent triggereddual wire

FLEX RAYtime triggered

fault tol,2x2 wire

25.6

M

20

K

2

M

1

M

125

K

incremental cost per node

[$]

D2B, MOSToptical bus

1 2 3 4

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Automotive Body Network

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Master / Slave Protocol

MasterControls the whole Bus and Protocol

FUNCTIONS

sends Sync Break, Sync Byte sends ID-Field

receives WakeUp from slave nodes

stable clock necessary

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Master/Slave Protocol

Slave Is one of 2-16 Members on the Bus.

receives or transmits Data when an

appropriate ID is sent by the master. determines what to do.

sends 2, 4, or 8 Data Bytes and

Check-Byte.

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Message Frame

It is for slaves to detect a message istransmitted on the bus

It consists of at least 13 bits of zeros.

Specific Pattern for Determination of TimeBase

A Synch Byte precedes any Message Frame

Synch Byte:

Synch Break:

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IdentifierID-Field: Incorporates Information about the sender, the

receiver(s) and the Data field length.

2 Parity Bits protect this highly sensitive ID-Field.

A total of 64 Message Identifiers are possible.

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LIN Communication - Data from

Slave to Master

data byte data byte checksum

Slave Node

Slave Task Trans

Slave Task Rec

Master Node

LIN Master Task

Slave Task Trans

Slave Task Recquartz

Request Frame

identifier synch field synch break

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LIN Communication - Data from

Master to Slave(s)Master Node

LIN Master Task

Slave Task Trans

Slave Task Recquartz

Slave Node A

Slave Task Trans

Slave Task Rec

Slave Node B

Slave Task Trans

Slave Task Rec

Command Frame

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LIN Communication - Data from

Slave to SlaveSlave Node A

Slave Task Trans

Slave Task Rec

Slave Node B

Slave Task Trans

SlaveTask Rec

Master Node

LIN Master Task

Slave Task Trans

Slave Task Recquartz

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LIN Advantages

Easy to use

Components available

Cheaper than CAN and othercommunications busses

More reliable vehicles

Extension easy to implement.

Error detection by 8 bits checksum and 2 parity

bits in identifier

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CONCLUSION

The LIN protocol for developing networks for

automobile

More flexibility to the network

It is Multiplexed Communication system.

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References1. Trends in Automotive Communication SystemsNicolas Navet, Yeqiong Song, Franoise Simonot-lion, And

Cdric Wilwert Proceedings Of The Ieee, Vol. 93, No. 6,June2005

2.Evolution of Local Interconnect Network (LIN)

Matthew Ruff 8/16 Bit Products Systems EngineeringMotorola, Inc.

Austin, Texas 0-7803-7954-3/03/$17.00 2003 IEEE.

3.http://www.lin-subbus.org

4.www.interfacebus.com

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THANK YOU...