SSD1805TR1 ETC2 [List of Unclassifed Manufacturers], SSD1805TR1 Datasheet - Page 20

• Manufacturer Part Number: SSD1805TR1
• Description: 132 x 68 STN LCD Segment / Common Monochrome Driver with Controller
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

4) Contrast Control (Voltages referenced to V
where V
Please refer to figure 5 on page 21 for the contrast curve with 8 sets of internal resistor network gain.
5) Self adjust temperature compensation circuitry
Provide 4 different compensation grade selections to satisfy the various liquid crystal temperature grades.
The grading can be selected by software control. Defaulted temperature coefficient (TC) value is –0.05%/°C.
Command Set
Gain = 1+R
Solomon Systech
Software control of the 64 contrast voltage levels at each voltage regulator feedback gain. The equation
of calculating the LCD driving voltage is given as:
ref
TC Settings
TC0
TC2
TC4
TC7
= 1.6 and
V
V
2
/R
out
con
1
4.96
000

 




1
= contrast setting
1
R
R
121
Table 7 - Temperature compensation coefficient
Temperature compensation coefficient [%/
-0.05
-0.15
-0.20
-0.25
1
2
001
5.70
210

 

*
V
con
010
6.54



Table 6 - Gain Setting
*
SS
V
)
ref
011
7.41
100
8.33
Jun 2004 P 20/52
o
C]
101
8.95
Vref typical value [V]
1.60
1.70
1.75
1.85
110
10.05
Rev 1.1
SSD1805 Series
111
11.01