參數(shù)資料
型號(hào)： 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(dòng)程序
文件頁(yè)數(shù)： 37/54頁(yè)
文件大?。?/td> 549K
代理商： S6A0090
64 SEG / 26 COM DRIVER & CONTROLLER FOR STN LCD
S6A0090
33
Electronic Contrast Control (EV = 0, 32 Steps)
For 32 contrast-step, EV flag of EV set mode instruction field should be set to "Low", and then, Electronic Contrast
Control data bits 28h = (C4, C3, C2, C1, C0) can be valid. Voltage regulation is adjusted as 32-contrast step
according to the value of electronic contrast control data bits. LCD drive voltage V0 has one of 32 voltage values if
5-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 regulator on using power control
instruction.
Rb
V0 = ( 1 + ------------ )
×
V
EV
– – – – – – – (2)
Ra
V
EV
= V
REF
– n
α
(n = 0, 1, 2, ......, 30, 31)
α
= V
REF
/ 150
Table 12. Electronic Contrast Control Register (32 steps)
No.
C7
C6
C5
C4
C3
C2
C1
C0
n
α
V0
Contrast
1
-
-
-
0
0
0
0
0
0
α
(default)
1
α
2
α
3
α
.
.
.
30
α
31
α
2
-
-
-
0
0
0
0
1
3
-
-
-
0
0
0
1
0
4
-
-
-
0
0
0
1
1
.
.
.
.
.
.
-
.
.
.
-
.
.
.
-
.
.
.
1
.
.
.
1
.
.
.
1
.
.
.
1
.
.
.
0
31
32
-
-
-
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 20. Electronic Contrast Control Circuit
For example,
Ra = 1 [M
], Rb = 2 [M
], n = 0
then V0 = 6V
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