BU9729K Datasheet, PDF (11/12 Pages) Rohm – Segment-type LCD driver

Standard ICs
•^{LCD drive waveforms}
VC
V1
COM1
V2
VSS
VC
V1
COM2
V2
VSS
VC
V1
COM3
V2
VSS
VC
V1
COM4
V2
VSS
VC
V1
V2
VSS
VC
V1
V2
VSS
VC
SEG1
V1
SEG18
V2
VSS
VC
V1
V2
VSS
VC
V1
V2
VSS
Frame interval
Fig. 7
BU9729K
COM1 COM2 COM3 COM4
0
0
00
(No SEGn corresponding
from COM1 to COM4 are
displayed.)
1
0
00
(Only SEGn corresponding
to COM1 are displayed.)
0
1
00
(Only SEGn corresponding
to COM2 are displayed.)
0
1
01
(Only SEGn corresponding
to COM2 and COM4 are
displayed.)
1
1
11
(All SEGn corresponding
from COM1 to COM4 are
displayed.)
11