STE2002_06 ST Microelectronics, Inc., STE2002_06 Datasheet - Page 9

• Manufacturer Part Number: STE2002_06
• Description: 81 x 128 Single-chip LCD Controller/driver
• Manufacturer: ST Microelectronics, Inc.

STE2002
Figure 3.
thus providing an 1/(n+4) ratio, with n calculated from:
For m = 81, n = 6 and an 1/10 ratio is set.
For m = 65, n =5 and an 1/9 ratio is set.
The STE2002 provides three bits (BS0, BS1, BS2) for programming the desired Bias Ratio
as shown below:
Table 2.
The following table Bias Level for m = 65 and m = 81 are provided:
Table 3.
BS2
0
0
0
0
1
1
1
1
Symbol
Bias level generator
Bias ratio programming
Bias level
V1
V2
V3
V4
V5
V6
BS1
nR
R
R
R
R
0
0
1
1
0
0
1
1
m = 65 (1/9)
2/9*V V
=
1/9 *V
8/9*V
7/9*V
n + 3
n + 4
n + 2
n + 4
n + 4
n + 4
V
V
LCD
2
1
SS
V
V
LCD
·V
·V
·V
·V
SS
D00IN1150
m –
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
BS0
0
1
0
1
0
1
0
1
m = 81 (1/10)
Circuit description
9/10*V
8/10*V
2/10*V
1/10*V
V
V
LCD
SS
LCD
LCD
LCD
LCD
n
7
6
5
4
3
2
1
0
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