UPD784218 Datasheet, PDF (78/92 Pages) NEC – 16-/8-BIT SINGLE-CHIP MICROCONTROLLERS

Serial Operation
(1) 3-wire serial I/O mode
SCK
SI/SO
µPD784218, 784218Y
tKH1, 2
tKCY1, 2
tKL1, 2
tKSO1, 2
tKSI1, 2
tSIK1, 2
(2) UART mode
ASCK
tKCY3
tKH3
tKL3
(3) I²C bus mode (µPD784218Y Subseries only)
SCL0
tLOW
tR
tHD : DAT
tHD : STA
SDA0
tBUF
Stop
Start
condition condition
tHIGH
tSU : DAT
tF
tSU : STA
tHD : STA
Restart
condition
tSP
tSU : STO
Stop
condition
78
Data Sheet U12304EJ2V0DS00