UPD75518 Datasheet, PDF (171/180 Pages) NEC – 4 BIT SINGLE-CHIP MICROCOMPUTER

Serial Transfer Timing
Three-wire serial I/O mode:
tKCY1
tKL1
tKH1
SCK
SI
tKSO1
tSIK1
tKSI1
Input data
SO
Output data
Two-wire serial I/O mode:
tKCY2
tKL2
tKH2
SCK
tKSO2
tSIK2
tKSI2
SB0 and SB1
µPD75518(A)
171