NEC PD789488 User Manual page 228

CHAPTER 12 SERIAL INTERFACE 1A0
Figure 12-5. 3-Wire Serial I/O Mode Timing (2/2)
(ii) Slave operation timing
SIO1A0
write
SCK10
1 2 3 4 5 6 7 8
SI10
DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0
SO10 Note DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0
INTCSI10
Note The value of the last bit previously output is output.
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User's Manual U15331EJ4V1UD