參數(shù)資料
型號(hào)： HD4074329
廠商： Hitachi,Ltd.
英文描述： 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
中文描述： 4位HMCS400系列微電腦（4位單片微計(jì)算機(jī)）
文件頁數(shù)： 64/94頁
文件大小： 573K
代理商： HD4074329
HD404328 Series
64
LCD Output Register (LOR: $015):
Write-only register used to specify that ports R2–R5 act as pins
SEG1–SEG16, as shown in table 32.
Table 32
LCD Output Register
LOR
LOR
LOR
LOR
Bit 3
Port Selection
Bit2
Port Selection
Bit 1
Port Selection
Bit 0
Port Selection
0
R5
0
R4
0
R3
0
R2
1
SEG16–SEG13
1
SEG12–SEG9
1
SEG8–SEG5
1
SEG4–SEG1
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 40.
Since HD404328U and HD4074329U do not have built-in division resistors, they require external LCD
voltage division resistors for voltage adjustment.
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—and 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
k
to 10 k
would usually be suitable. (Another effective method is to attach capacitors of 0.1
μ
F 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
).
相關(guān)PDF資料
PDF描述
HD404324 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
HD404326 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
HD4074449 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
HD404448 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
HD404449 4-bit HMCS400-Series 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
HD4074329C 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074329FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074329S 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD4074329U 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:microcomputer designed to increase program productivity
HD4074329UFS 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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