CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U15195EJ5V0UD
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Figure 10-23. Reception Completion Interrupt and Error Interrupt Generation Timing During
Synchronous Mode Reception
(a) During normal operation (in 1-frame reception mode)
START
Receive data
Flag in reception
(SIR1)
Reception completion
interrupt
(INTSR1)
Error interrupt
STOP
(b) In 2-frame continuous reception mode
START
START
Receive data
Flag in reception
(SIR1)
Reception completion
interrupt
(INTSR1)
Error interrupt
STOP
STOP
(1)
(2)
(3)
<Explanation>
(1) If the start bit of the second frame is not detected, no reception completion interrupt is generated.
(2) If an error occurs in the first frame, an error interrupt is generated following detection of the stop bit of
the first frame (at the calculated position).
(3) If an error occurs in the second frame, an error interrupt is generated simultaneously with a reception
completion interrupt.
If an error occurs in the first frame, no error interrupt is generated even if an error occurs in the
second frame.