BU9728AKV Datasheet, PDF (5/10 Pages) Rohm – LCD driver for segment-type LCDs

Standard ICs
•^{Timing charts}
CS
SCK
SD
C/D
tWL2
tSU2
tCYC
tWH1
tWL1
tSU1
tTLH
tH1
tTHL
tSCH
tSU3
Fig.1 Interface timing
SCK
tCYC
BU9728AKV
tWH2
tH2
tCCH
tH3
tWAIT
SD
D7
D6
D0
D7
Fig.2 Command cycle
•^{Data format}
Serial data is 4-line data transmitted in synchronization with the clock. Serial data with a bit length of 8 bits is input in
synchronization with SCK. If C / D is HIGH at the rising edge of the 8 × nth SCK clock pulse, the serial data is recog-
nized as command data, and if C / D is LOW, the serial data is recognized as display data. Serial data is input in
sequential order, starting from the MSB.
5