R8C/20 Group, R8C/21 Group 17. Hardware LIN
Rev.2.00 Aug 27, 2008 Page 358 of 458
REJ09B0250-0200
17.5 Interrupt Requests
There are four interrupt requests that are generated by the hardware LIN: Synch Break detection, Synch Break
generation completed, Synch Field measurement, and bus collision detection. These interrupts are shared with the
timer RA interrupt.
Table 17.2 lists the Interrupt Requests of Hardware LIN.
Table 17.2 Interrupt Requests of Hardware LIN
Interrupt Request Status Flag Cause of Interrupt
Synch Break Detection SBDCT Generated when timer RA has underflowed after measuring
the low level duration of RXD0 input, or when a low-level
signal is input for a duration longer than the Synch Break
period during communication.
Synch Break Generation
Completed
Generated when timer RA has completed outputting a low-
level signal to TXD0 for set period.
Synch Field Measurement SFDCT Generated when measurement for 8 bits of the Synch Field
by timer RA is completed.
Bus Collision Detection BCDCT Generated when the RXD0 input and TXD0 output values
differed at data latch timing while UART0 is enabled for
transmission.
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