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CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U14492EJ3V0UD
514
(ii) In case of contention 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 10-33
).
In the transmission/reception mode, the value of the SOTBFn register is retransmitted, and illegal
data is sent.
Figure 10-33. Interrupt Request and Register Access Contention
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.
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