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Chapter 13
Serial Interface Function
Preliminary User’s Manual U15839EE1V0UM00
- 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 13-41).
In the transmission/reception mode, the value of the SOTBFn register is retransmitted, and illegal
data is sent.
Figure 13-41:
Interrupt Request and Register Access Contention
Remarks: 1. n = 0 to 2
2. rq_clr: Internal signal. Transfer request clear signal.
Reg_WR:Internal signal. This signal indicates that the transmit data buffer register
(SOTBn/SOTBLn) has been written.
SCK0n
(input/output)
INTCSIn
interrupt
rq_clr
Reg_R/W
Transfer reservation period
0
1
2
3
4
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