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| 型號： | MSM6562B-xx |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | DOT MATRIX LCD CONTROLLER DRIVER |
| 中文描述： | 點(diǎn)陣LCD控制器驅(qū)動 |
| 文件頁數(shù)： | 24/50頁 |
| 文件大小： | 496K |
| 代理商： | MSM6562B-XX |
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Semiconductor
MSM6562B-xx
24/50
9. LCD Display Circuit (COM
1
to COM
16
, SEG
1
to SEG
100
, L, CP, DO, DF, SHL
0
, SHL
1
) :
Since the MSM6562B-xx provides the COM signal outputs (16 outputs) and the SEG signal
outputs (100 outputs), even a single MSM6562B-xx device can display 20 characters (1-line
display) or 40 characters (2-line display).
The character pattern data is converted into the serial data and is serially transferred through the
shift register. The transfer direction of the serial data is controlled by SHL
0
and SHL
1
and is
shown as follows.
SHL
0
SHL
1
L
L
L
H
H
L
H
H
SEG
100
SEG
1
Transfer direction
SEG
1
SEG
100
SEG
100
SEG
1
SEG
1
SEG
50
fi
SEG
100
SEG
51
Connect SHL
0
and SHL
1
to V
DD
or V
SS
. Keep the set states of the SHL
0
and SHL
1
pins unchanged
during IC operation.
The SEG
1
to SEG
100
are used to display 20-digit display on the LCD. To display more than 20
digits, the character extension IC (MSM5259) is used.
The character extension IC (MSM5259) is an extended IC for segment signal output. Interfacing
with the MSM5259 is provided through data output pin (DO), clock output pin (CP), latch output
pin (L), and display frequency pin (DF). The character pattern data is serially transferred to the
MSM5259 through DO and CP. When 60-character (= 1-line display) or 20-character (= 2-line
display) is output, the latch pulse is also output through pin L. By this latch pulse, the data
transferred serially to the MSM5259 is latched to be used as the display data. The display
frequency (DF) signal required when the LCD is displayed is also output from DF pin in
synchronization with this latch pulse.
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