SSD1815BT ETC1 [List of Unclassifed Manufacturers], SSD1815BT Datasheet - Page 12

• Manufacturer Part Number: SSD1815BT
• Description: LCD Segment / Common Driver with Controller
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

3. Contrast Control (Voltages referenced to V
voltage is given as:
SOLOMON
Software control of the 64 contrast voltage levels at each voltage regulator feedback gain. The equation of calculating the LCD driving
where
*Note: There may be a calculation error of max. 6% when comparing with measurement values.
Int. Reg.
Resistor
Ratio Setting
Gain
Beta
-11.0000
-13.0000
-15.0000
-3.0000
-5.0000
-7.0000
-9.0000
0
0
96.79
-3.37
Figure 6 Voltage Regulator Output for Different Gain/Contrast Settings
10
VBE
TC
R
V
V
1
96.53
-3.87
L
ref
6
(-0.01%/°C)
V
0.02
0.73
20
(
0
DD
V
VL6 vs CONTRAST SETTINGS
2
96.33
DD
-4.43
BE
Contrast level at VDD = 2.775V
)
Gain
(-0.15%/°C)
R
1
0.52
0.43
3
96.06
30
2
-4.99
(
V
R
1 (
DD
(-0.20%/°C)
Contrast
4
95.78
V
-5.58
0.52
0.27
SS
40
4
)
)
5
95.54
-6.00
(-0.30%/°C)
)
0.51
0.12
50
V
7
ref
6
95.26
-6.67
07/2002
Rev1.6
60
7
95.02
-7.27 -(1+R
Resistor
Ext.
97.62
2
/R
IR=20H
IR=21H
IR=22H
IR=23H
IR=24H
IR=25H
IR=26H
IR=27H
SSD1815B
1
)
13