NEC UPD703116 User Manual page 466

Figure 10-21. Transmission/Reception Timing Chart for Synchronous Mode (2/3)
Serial clock
Transmit data
Transmission
register
write signal
Flag in transmission
(SOTn)
Transmission
completion
interrupt
(INTSTn)
Flag in reception
(SIRn)
Reception
completion
interrupt
(INTSRn)
Reception buffer
(RXBn)
Reception buffer
(RXBLn)
Remark n = 1, 2
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CHAPTER 10 SERIAL INTERFACE FUNCTION
(b) In 2-frame continuous transmission/reception mode
Undefined (hold previous value)
Undefined (hold previous value)
User's Manual U14492EJ5V0UD
Stop bit
5A5AH
5AH
Stop bit
5A15H
15H