Lin Specifications; Lin Frame Configuration - Fujitsu F2MC-8FX Series User Manual

to a slave. An ordinary single metal wire is used as the bus cable. CAN combines two opposing
metal wires to make one twisted pair cable. FlexRay uses two twisted pair cables. Consequently,
LIN has the advantage of using a single cable for numerous network wires, unlike CAN and
FlexRay, which use twisted pair cables.
The communications distance is 40m max. LIN can be used in combination with CAN, and in
such cases, CAN is most frequently used as the core network, and LIN is used as the branch
network.
4. The baud rate is 20kbps max.
The baud rate according to LIN specifications is within the range 1 to 20kbps. Practically, the
baud rate of LINs used as LANs depends on the individual vehicle manufacturer's system
specifications, but generally one of the following is used: 2,400kbps, 9,600kbps, or 19,200kbps.
5. Communications errors are detected only, and subsequent processing depends on the
application
With LIN, communications errors are detected based on information as to whether transmitting
and receiving has been performed successfully. Processing after an error has been detected,
however, is not specified. Here, LIN error processing can be customized according to the
application. CAN and FlexRay management of the communications status depends on the
counter value, which is called the error counter, is featured by the specifications, but in LIN, if
an error occurs, simple error processing is possible, in which LIN merely waits for the next
command.
5.2

LIN specifications

This section explains briefly the LIN specifications.
For detailed specifications, access the LIN consortium website (http://www.lin-subbus.org/), and
register your name and e-mail address to get a specifications.
5.2.1

Lin frame configuration

This section explains frames, which is the basic unit of LIN communication.
LIN frames are configured using "headers" and "responses". As shown in "Figure 5-3 LIN
communication flow", the basic communications flow is a procedure in which the master sends
headers to the slaves, and the slaves implement processing according to the contents of the
headers received, and then send a response to the master.
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