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CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (LCD Driver)
4.8.6 LCD contrast adjustment
In the S1C63666, the LCD contrast can be adjusted by the software.
It is realized by controlling the voltages V
The contrast can be adjusted to 16 levels as shown in Table 4.8.6.1. V
0.95 to 1.40 V (0.03 V step), and other voltages change according to V
∗ Do not set V
At initial reset, the LC0–LC3 are set to 0000B. The software should initialize the register to get the desired
contrast.
When an external power supply is selected by mask option, the LC0–LC3 register becomes invalid.
60
, V
C1
Table 4.8.6.1 LCD contrast
No.
LC3
LC2
LC1
0
0
0
0
1
0
0
0
2
0
0
1
3
0
0
1
4
0
1
0
5
0
1
0
6
0
1
1
7
0
1
1
8
1
0
0
9
1
0
0
10
1
0
1
11
1
0
1
12
1
1
0
13
1
1
0
14
1
1
1
15
1
1
1
to 1.16 V or more (LC = 7 or more) when the LCD system
C1
voltage regulator is driven in the halver mode.
and V
output from the LCD system voltage circuit.
C2
C3
C1
C1
LC0
V
(V)
C1
0
0.95
*
1
0.98
*
0
1.01
*
1
1.04
*
0
1.07
*
1
1.10
*
0
1.13
*
1
1.16
0
1.19
1
1.22
0
1.25
1
1.28
0
1.31
1
1.34
0
1.37
1
1.40
EPSON
is changed within the range from
.
Contrast
light
dark
S1C63666 TECHNICAL MANUAL
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