AN1278 datasheet(41/44 Pages) STMICROELECTRONICS

Part #	AN1278

Description	Many mechanical components in the automotive sector have been replaced

PDF	44 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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LIN (LOCAL INTERCONNECT NETWORK) SOLUTIONS

– Delay the occurrence of the first OC interrupt too much. Specifically: A problem occurs if the

second output compare is set after the expected time, which is the middle of the bit. So as

long as the first OC interrupt ends before the middle of the bit, the delay is acceptable. See

Figure 21.

Figure 21. Handling the first OC Interrupt in transmission mode

– Delay the occurrence of the second OC interrupt too much. Specifically: A problem occurs if

the sample time defined at the beginning of the interrupt is delayed outside the bit. See Fig-

ure 22

Figure 22. Handling the second OC Interrupt in transmission mode

1 bit

application task

deadline for

end of 1st

1rst OC request

1rst OC serviced

OC interrupt

1 bit

application task

deadline for

start of 2nd

2nd OC request

2nd OC serviced

OC interrupt

AN1278 Datasheet(PDF) 41 Page - STMicroelectronics