NEC UPD703116 User Manual page 505

CHAPTER 10 SERIAL INTERFACE FUNCTION
Figure 10-31. Timing Chart of Next Transfer Reservation Period (2/2)
(c) When data length: 8 bits, operation mode: CKP bit = 0, DAP bit = 1
SCKn
(I/O)
INTCSIn
interrupt
Reservation period: 6.5 SCKn cycles
(d) When data length: 16 bits, operation mode: CKP bit = 0, DAP bit = 1
SCKn
(I/O)
INTCSIn
interrupt
Reservation period: 14.5 SCKn cycles
Remark n = 0, 1
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User's Manual U14492EJ5V0UD