AN1278 Datasheet, PDF (43/44 Pages) STMicroelectronics – Many mechanical components in the automotive sector have been replaced

LIN (LOCAL INTERCONNECT NETWORK) SOLUTIONS
As a result the application software should not delay the occurrence of the SCI reception no-
tification interrupt so much that an overrun condition occurs. Specifically: The end the LIN in-
terrupt should end before the stop bit of the next byte.
Figure 25. Reception Interrupt Handling
1 byte
application task
SCI reception
interrupt request
interrupt served
4.4.3.2 Transmission
In transmission delays coming from the application cannot disturb the proper working of the
software. This will delay the transmission and the issue is more a timeout issue on the current
transmitted frame: If the interrupt time is very long the transmitted frame may exceed the max-
imum allowed frame time. The SCI interrupt in transmission occurs also at the stop bit. If the
occurrence of the interrupt is delayed by the application the interbyte time will increase.
5 SUMMARY OF CHANGES
Revision
Main changes
1.0 First version
1.1 Remove section “HOW TO GET THE LIN SOFTWARE?”
Date
August 2001
April 2002
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