STE2004S STMicroelectronics, STE2004S Datasheet - Page 8
STE2004S
Manufacturer Part Number
STE2004S
Description
102 x 65 Single Chip Lcd Controller / Driver
Manufacturer
STMicroelectronics
Datasheet
1.STE2004S.pdf
(66 pages)
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STE2004S
Table 3.
The following table Bias Level for m = 65 and m = 49 are provided:
Table 4.
3.6 LCD Voltage Generation
The LCD Voltage at reference temperature (To = 27°C) can be set using the VOP register content according to
the following formula:
with the following values:
Note that the three PRS values produce three adjacent ranges for VLCD. If the V
are set to zero the internal voltage generator is switched off.
The proper value for the VLCD is a function of the Liquid Crystal Threshold Voltage (Vth) and of the Mul-
tiplexing Rate. A general expression for this is:
For MUX Rate m = 65 the ideal V
than:
8/66
Symbol
BS2
Ao
A1
A2
To
0
0
0
0
1
1
1
1
B
Symbol
V1
V2
V3
V4
V5
V6
V
LCD
LCD
(T=To) = V
0.0303
Value
10.71
BS1
2.95
6.83
is:
27
V
0
0
1
1
0
0
1
1
LCD
V
op
V
LCD
LCD(to)
=
=
m = 65 (1/9)
2/9*V V
----------------------------------- - V
o = (Ai+V
1/9 *V
(
---------------------------------------- -
8/9*V
7/9*V
2
6.85 V
V
V
1
⋅
= 6.85 · V
LCD
SS
⎛
⎝
+
1
LCD
LCD
LCD
0.03
⋅
LCD
–
m
OP
-------- -
th
1
m
–
· B)
⎞
⎠
th
A
⋅
i
)
BS0
Unit
°C
th
V
V
V
V
0
1
0
1
0
1
0
1
(i=0,1,2)
OP
m = 49 (1/8)
7/8*V
6/8*V
2/8*V
1/8*V
register and PRS bits
V
V
LCD
PRS = [0;0]
PRS = [0;1]
PRS = [1;0]
SS
LCD
LCD
LCD
LCD
Note
n
7
6
5
4
3
2
1
0
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