參數(shù)資料
型號(hào)： SSD1800Z
廠商： Electronic Theatre Controls, Inc.
英文描述： LCD Segment / Common Driver with Controller
中文描述： LCD段/驅(qū)動(dòng)器與控制器通用
文件頁(yè)數(shù)： 22/42頁(yè)
文件大?。?/td> 598K
代理商： SSD1800Z
Solomon Systech
Mar 2004
P 22/42 Rev 1.0
SSD1800 Series
2. Voltage Regulator
resistor network. The reference voltage is supplied by internal Vref and Ref should be connected to low for normal
operation of internal voltage reference Vref. The external resistors are required to be connected between AV
SS
and
V
F
(R1), and between V
F
and V
L6
(R2). The following equations are used to calculate the regulator output voltages.
2
1
1
R
AND
06
.
2
±
=
V
V
REF
3. Contrast Control
Software control of the 32 contrast voltage levels at each voltage regulator feedback gain. The equation of calculating
the LCD driving voltage is given as:
2
1
1
1
150
R
where n is set in contrast control register.
The feedback gain control for LCD driving contrast can be adjusted by using reference voltage and external
6
L
REF
R
V
V
=
+
×
6
L
REF
R
n
V
V
=
+
×
×
Table 7- Contrast Control Register
No.
1
2
3
4
.
.
.
31
32
X7
-
-
-
-
-
-
-
-
X6
-
-
-
-
-
-
-
-
X5
-
-
-
-
-
-
-
-
X4
0
0
0
0
.
.
.
1
1
X3
0
0
0
0
.
.
.
1
1
X2
0
0
0
0
.
.
.
1
1
X1
0
0
1
1
.
.
.
1
1
X0
0
1
0
1
.
.
.
0
1
n
VL6
Contrast
High
.
.
.
.
.
.
.
Low
(“ - “: Don’t care)
0 (default)
1
2
3
.
.
.
30
31
Maximum
.
.
.
.
.
.
.
Minimum
4. Bias Divider
Divide the regulator output to give the LCD driving voltages (V
L5
-V
L2
). A low power consumption circuit design in
this bias divider saves most of the display current comparing to traditional design.
5. Bias Ratio Selection circuitry
Software control of 1/4 and 1/5 bias ratio to match the characteristic of LCD panel.
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