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參數(shù)資料
| 型號： | T6A04A |
| 廠商： | Toshiba Corporation |
| 英文描述： | Column and Row Driver LSI for a Dot Matrix Graphic LCD |
| 中文描述： | 列和行驅(qū)動器LSI的點陣圖形液晶顯示器 |
| 文件頁數(shù)： | 10/25頁 |
| 文件大小： | 307K |
| 代理商： | T6A04A |
T6A04A
2002-03-06
10
Voltage divider resistors, contrast control circuit
The T6A04A has on-chip resistors which include op-amps, that divide the bias voltage, and a contrast control
circuit. The voltage bias is modified by the values of R
1
and R
2
. One of four biases can be selected. These
resistors and the contrast control circuit are shown in Figure 7 below.
Op-amp, op-amp control register
The T6A04A has five operational amplifiers which determine the LCD driving level. The power supplied by
these op-amps is modified by the contents of the op-amp control register to match the LCD panel. The op-amp
can also be controlled in such a way that it supplies full current on the rising edge of C
L
and a reduced current
otherwise.
To maintain good LCD contrast, connect a capacitor between the op-amp output and V
DD
. The value of the
capacitor should normally be in the range 0.1 to 1.0 F.
Figure 7
/STB
5RB
4RB
3RB
2RB
R
2
R
1
RB
RB
V
DD
V
LC1
RB
RB
V
LC3
V
LC4
V
LC5
DB0
RC
DB1
2RC
DB2
4RC
DB3
8RC
DB4
16RC
DB5
32RC
V
EE
DB6
DB7
C
R
Voltage Follower Circuit
R
B
134 k (typ.)
R
C
10.1 k (typ.)
Decoder
V
LC2
Decoder
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|---|---|
| T6B08 | CMOS DIGITAL INTEGRATED CIRCUIT (ROW DRIVER FOR A DOT MATRIX LCD) |
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| T6B65 | COLUMN DRIVER LSI FOR A DOT MATRIX LCD |
| T6B65A | COLUMN DRIVER LSI FOR A DOT MATRIX LCD |
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