NEC 78K0 User Manual page 308

(2) Transmission/reception timing (Type 2; TRMD10 = 1, DIR10 = 0, CKP10 = 0, DAP10 = 1)
SCK10
Read/write trigger
SOTB10
SIO10
CSOT10
INTCSI10
CSIIF10
SI10 (input AAH)
SO10
55H is written to SOTB10.
308
CHAPTER 14 SERIAL INTERFACE CSI10
Figure 14-5. Timing in 3-Wire Serial I/O Mode (2/2)
55H (communication data)
ABH 56H
User's Manual U16227EJ2V0UD
ADH 5AH B5H 6AH D5H AAH