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Lin.pdf
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Lin.pdf
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Local Interconnect Network
- 1.General
- 2.Frame Structure
- 3.Frame Type
- 4.Schedule Table
- 5.State Machine
- 6.Autosar Configuration
1. General
1.1 Feature
LIN is a concept for low cost automotive networks, which complements the existing
portfolio of automotive multiplex networks.
The main properties of the LIN bus are :
● Single master with multiple slaves
● Based on common UART/SCI interface hardware, an equivalent in software or as
pure state machine
● Speed up to 20 Kbit/s
● Signal based application interaction
● Transport layer and diagnostic support
● Half duplex transmission
● Low cost
1.2 Node
The LIN network consists of one master node and multiple slave nodes. The master node
contains the master task as well as a slave task. All other slave nodes contain a slave task only.
A sample cluster with one master node and multiple slave nodes is depicted below :
The master task decides when and which frame shall be transferred on the bus. The slave
tasks provide the data transported by each frame.
2. Frame structure
A completed frame consists of a header (provided by the master task) and a response
(provided by the slave task). The process to transfer a completed frame should follow the strictly
sequence, like the below :
The completed frame structure should be like the following :
The header consists of a Break Field, Sysn Field and Protected Identifier Field.
The response consists of multiple data and checksum.
PS :
Dominant level : 0
Recessive level : 1
During transmission, LIN transmitted each byte field as the byte field.
- Ten bits
- The LSB of the data is sent first and the MSB last
- The start bit is encoded as a bit from recessive to dominant
- The stop bit is encoded as a bit with recessive
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