STE2004SDIE2 STMicroelectronics, STE2004SDIE2 Datasheet - Page 11

• Manufacturer Part Number: STE2004SDIE2
• Description: 102 x 65 single-chip LCD controller/driver
• Manufacturer: STMicroelectronics

STE2004S
Figure 6.
providing an 1/(n+4) ratio, with n calculated from:
For m = 65, n = 5, a 1/9 ratio is set.
For m = 49, n =4, a 1/8 ratio is set.
The STE2004S provides three bits (BS0, BS1, BS2) for programming the bias ratio as shown
below:
Table 2. Bias ratio programmable bits
The following table shows the bias level for m = 65 and m = 49:
BS2
0
0
0
0
1
1
1
1
Bias level generator
nR
R
R
R
R
BS1
0
0
1
1
0
0
1
1
n
=
m 3
n + 3
n + 4
n + 2
n + 4
n + 4
n + 4
V
V
LCD
2
1
SS
–
·V
·V
·V
·V
D00IN1150
LCD
LCD
LCD
LCD
BS0
0
1
0
1
0
1
0
1
Circuit description
n
7
6
5
4
3
2
1
0
11/79