CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U15195EJ5V0UD
506
(ii) In case of conflict between interrupt request and register access
Since continuous transfer has stopped once, executed as a new repeat transfer.
In the slave mode, a bit phase error transfer error results (refer to
Figure 10-34
).
In the transmission/reception mode, the value of the SOTBFn register is retransmitted, and illegal
data is sent.
Figure 10-34. Interrupt Request and Register Access Conflict
SCKn
(I/O)
INTCSIn
interrupt
rq_clr
Reg_R/W
Transfer reservation period
0
1
2
3
4
Remarks 1.
n = 0, 1
2.
rq_clr: Internal signal. Transfer request clear signal.
Reg_R/W: Internal signal. This signal indicates that receive data buffer register (SIRBn/
SIRBLn) read or transmit data buffer register (SOTBn/SOTBLn) write was
performed.