R8CSLASH2G datasheet(261/344 Pages) RENESAS

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R8C/2G Group

19. Hardware LIN

Rev.1.00

Apr 04, 2008

Page 241 of 318

REJ09B0387-0100

19.4.4

Hardware LIN End Processing

Figure 19.12 shows an Example of Hardware LIN Communication Completion Flowchart.

Use the following timing for hardware LIN end processing:

• If the hardware bus collision detection function is used

Perform hardware LIN end processing after checksum transmission completes.

• If the bus collision detection function is not used

Perform hardware LIN end processing after header field transmission and reception complete.

Figure 19.12

Example of Hardware LIN Communication Completion Flowchart

Hardware LIN Clear the status flags

(Bus collision detection, Synch Break detection, Synch

Field measurement)

Bits B2CLR, B1CLR, B0CLR in the LINST register

← 1

Timer RA Read the count status flag

TCSTF flag in TRACR register

UART0 Complete transmission via UART0

When the bus collision detection

function is not used, end

processing for the UART0

transmission is not required.

TCSTF = 0 ?

YES

Set the timer to stop counting.

Zero to one cycle of the timer RA

count source is required after timer

RA starts counting before the

TCSTF flag is set to 1.

After clearing hardware LIN

sta t us flag , stop the

hardware LIN operation.

Timer RA Set the timer to stop counting

TSTART bit in TRACR register

← 0

Hardware LIN Set the LIN operation to stop

LINE bit in the LINCR register

← 0

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