SIC63616-(Rev. 1.0) NO. P77
3240-0412
LDUTY0–LDUTY2: LCD drive duty switching register (FF51H•D0–D2)
Selects the LCD drive duty.
Table 4.6.6.5 Drive duty setting
Drive bias
(mask option)
–
–
–
1/4 bias
1/5 bias
1/5 bias
–
1/5 bias
LDUTY2
1
1
1
1
0
0
0
0
LDUTY1
1
1
0
0
1
1
0
0
LDUTY0
1
0
1
0
1
0
1
0
Duty
Prohibited
Prohibited
Prohibited
1/16
1/24
1/24
Prohibited
1/32
FLCKS = 11B
–
–
–
8 Hz
5.333 Hz
10.666 Hz
–
8 Hz
FLCKS = 10B
–
–
–
16 Hz
10.666 Hz
21.333 Hz
–
16 Hz
FLCKS = 01B
–
–
–
21.333 Hz
14.22 Hz
28.44 Hz
–
21.333 Hz
FLCKS = 00B
–
–
–
32 Hz
21.333 Hz
42.666 Hz
–
32 Hz
Frame frequency
At initial reset, this register is set to "000B".
LC3–LC0: LCD contrast adjustment register (FF52H)
Adjusts the LCD contrast.
Table 4.6.6.6 LCD contrast
No.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
LC3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
LC2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
LC1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
LC0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Contrast
Light
Dark
Setting this register changes the V
C1
–V
C5
LCD drive voltages.
At initial reset, this register is set to "0000B".