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參數(shù)資料
| 型號： | S6A0090 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | 64 SEG / 26 COM DRIVER & CONTROLLER FOR STN LCD |
| 中文描述： | 64賽格/ 26 COM驅(qū)動程序 |
| 文件頁數(shù)： | 38/54頁 |
| 文件大小： | 549K |
| 代理商： | S6A0090 |
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S6A0090
64 SEG / 26 COM DRIVER & CONTROLLER FOR STN LCD
34
Electronic Contrast Control (EV=1, 64 Steps)
For 64 contrast-step, EV flag of EV set mode instruction field should be set to "High", after this, Electronic
Contrast Control data bits 28h = (C5, C4, C3, C2, C1, C0) can be valid. Voltage regulation is adjusted as 64-
contrast step according to the value of Electronic Contrast Control data bits. LCD drive voltage V0 has one of 64
voltage values if 6-bit data is set to the Electronic Contrast Control register (RAM address 28h). When using the
Electronic Contrast Control function, you need to turn the voltage regulators on using power control instruction.
Rb
V0 = ( 1 + ----------- )
×
V
EV
– – – – – – – (3)
Ra
V
EV
= V
REF
– n
α
(n = 0, 1, 2, ....., 62, 63)
α
= V
REF
/ 300
Table 13. Electronic Contrast Control Register (64 Steps)
No.
C7
C6
C5
C4
C3
C2
C1
C0
n
α
V0
Contrast
1
-
-
0
0
0
0
0
0
0
α
(default)
1
α
2
α
3
α
.
.
.
62
α
63
α
2
-
-
0
0
0
0
0
1
3
-
-
0
0
0
0
1
0
4
-
-
0
0
0
0
1
1
.
.
.
.
.
.
-
.
.
.
-
.
.
.
1
.
.
.
1
.
.
.
1
.
.
.
1
.
.
.
1
.
.
.
0
62
63
-
-
1
1
1
1
1
1
Maximum
.
.
.
.
.
.
.
Minimum
High
.
.
.
.
.
.
.
Low
("
–
": Don't care)
_
+
Insid e C h ip
G N D
R a
R b
V
S S
V O U T
V 0
V R
V
R E F
+
V
E V
-
Figure 21. Electronic Contrast Control Circuit
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