參數(shù)資料
型號(hào)： M38C13E6HP
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述： 單芯片8位CMOS微機(jī)
文件頁(yè)數(shù)： 32/59頁(yè)
文件大?。?/td> 1063K
代理商： M38C13E6HP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C1 Group
32
Fig. 31 Example of circuit at each bias
Table 8. Bias control and applied voltage to V
L1
–V
L3
Bias value
1/3 bias
1/2 bias
1/1 bias
(static)
Voltage value
V
L3
=V
LCD
V
L2
=2/3 V
LCD
V
L1
=1/3 V
LCD
V
L3
=V
LCD
V
L2
=V
L1
=1/2 V
LCD
V
L3
=V
LCD
V
L2
=V
L1
=1/2 V
SS
Note :
V
LCD
is the maximum value of supplied voltage for the
LCD panel.
Bias Control and Applied Voltage to LCD
Power Input Pins
To the LCD power input pins (V
L1
–
V
L3
), apply the voltage shown
in Table 8 according to the bias value.
Select a bias value by the bias control bit (bit 2 of the LCD mode
register).
Common Pin and Duty Ratio Control
The common pins (COM
0
–
COM
3
) to be used are determined by
duty ratio.
Select duty ratio by the duty ratio selection bits (bits 0 and 1 of the
LCD mode register).
When the LCD enable bit is
“
0
”
, the output of COM
0
–
COM
3
is
“
L
”
level.
Table 9. Duty ratio control and common pins used
Duty
ratio
1
2
3
4
Common pins used
Notes 1:
Set COM
1
, COM
2
and COM
3
to be open.
2:
Set COM
2
and COM
3
to be open.
3:
Set COM
3
to be open.
Bit 1
0
0
1
1
Bit 0
0
1
0
1
COM
0
(Note 1)
COM
0
, COM
1
(Note 2)
COM
0
–
COM
2
(Note 3)
COM
0
–
COM
3
Duty ratio selection bits
R4
R5
R4 = R5
R
1
R
2
R3
R
1
=
R
2
=
R
3
V
L
3
V
L2
V
L1
V
L3
V
L
2
V
L
1
V
L3
V
L
2
V
L
1
1/3 bias
1/1 bias (static)
Contrast control
1
/
2
b
i
a
s
Contrast control
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