Datasheet
RL78/L12 CHAPTER 14 LCD CONTROLLER/DRIVER
R01UH0330EJ0200 Rev.2.00 640
Dec 13, 2013
Figure 14-25. Common Signal Waveforms (2/2)
(c) 1/3 bias method
COMn
(Three-time-slice mode)
T
F
= 3 T
V
L4
V
SS
V
LCD
V
L3
V
L2
T
F
= 4 T
COMn
(Four-time-slice mode)
V
L4
V
LCD
V
L3
V
L2
V
SS
T: One LCD clock period TF: Frame frequency
< Example of calculation of LCD frame frequency (When four-time slot mode is used) >
LCD clock: 32768/2
8
= 256 Hz (When setting to LCDC0 = 07H)
LCD frame frequency: 64 Hz
(d) 1/4 bias method
COMn
V
L3
V
L4
V
SS
V
LCD
V
L2
V
L1
T
F
= 8 T
(Eight-time-slice mode)
T: One LCD clock period T
F: Frame frequency
< Example of calculation of LCD frame frequency (When eight-time slot mode is used) >
LCD clock: 32768/2
8
= 256 Hz (When setting to LCDC0 = 07H)
LCD frame frequency: 32 Hz