參數(shù)資料
型號(hào)： HD4074618TF
廠商： Hitachi,Ltd.
英文描述： 4-Bit Single-Chip Microcomputer
中文描述： 4位單片機(jī)
文件頁數(shù)： 61/89頁
文件大小： 358K
代理商： HD4074618TF
HD404618 Series
61
Large Liquid-Crystal Panel Drive and V
LCD
:
To drive a large-capacity LCD, decrease the resistance of
the built-in division resistors by attaching external resistors in parallel, as shown in figure 38.
The size of these resistors cannot be simply calculated from the LCD load capacitance because the matrix
configuration of the LCD complicates the paths of charge/discharge currents flowing through the
capacitors. The resistance will also vary with lighting conditions. This size must be determined by trial
and error, taking into account the power dissipation of the device using the LCD, but a resistance of 1 to 10
k
would usually be suitable. (Another effective method is to attach capacitors of 0.1 to 0.3
μ
F.)
Always turn off the power switch (set bit 1 of the LCR to 0) before changing the liquid crystal drive
voltage (V
LCD
).
32
2
3
4
32
32
32
V
CC
V
2
V
3
GND
V
1
COM1
SEG1
to
SEG32
V
CC
V
2
V
3
GND
V
1
COM1
COM2
SEG1
to
SEG32
V
CC
V
2
V
3
GND
V
1
COM1
to
COM3
SEG1
to
SEG32
V
CC
V
2
V
3
GND
V
1
COM1
to
COM4
SEG1
to
SEG32
V
CC
V
LCD
V
CC
V
LCD
V
CC
V
LCD
V
CC
V
LCD
R
R
R
V (V )
V
2
V
3
GND
R
R
R
V (V )
V
2
V
3
GND
C
C
C
C = 0.1 to 0.3
μ
F
4-digit LCD
with sign
.
8-digit LCD
10-digit LCD
with sign
16-digit LCD
.
.
.
Static drive
1/2 duty cycle, 1/2 bias drive
1/3 duty cycle, 1/3 bias drive
1/4 duty cycle, 1/3 bias drive
V
≥
V
≥
GND
Figure 38 LCD Connection Examples
相關(guān)PDF資料
PDF描述
HD4046212R AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
HD404628R AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
HD4074629 AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
HD404629R AS Microcomputer Incorporating a DTMF Generator Circuit(微計(jì)算機(jī)帶雙音多頻發(fā)生器電路)
HD404638R 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī))
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD4074629 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a DTMF Generator Circuit
HD4074629F 制造商:Renesas Electronics Corporation 功能描述:
HD4074629FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074629H 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074629TF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
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