參數(shù)資料
型號: HD4048212R
廠商: Hitachi,Ltd.
英文描述: AS Microcomputer Incorporating a LCD controller/Driver Circuit(帶LCD控制/驅(qū)動電路的微計算機)
中文描述: 由于微機安裝有LCD控制器/驅(qū)動電路(帶液晶控制/驅(qū)動電路的微計算機)
文件頁數(shù): 104/147頁
文件大?。?/td> 519K
代理商: HD4048212R
HD404829R Series
104
LCD Output Register 3 (LOR3: $01F):
Write-only register used to specify ports R5
0
–R7
3
as pins SEG9–
SEG20 in 4-pin units (figure 93).
Bit
Initial value
Read/Write
Bit name
3
Not used
2
0
W
LOR32
0
0
W
LOR30
1
0
W
LOR31
LCD output register 3 (LOR3: $01F)
LOR30
0
1
R5
0
/SEG9–R5
3
/SEG12 mode selection
R5
0
–R5
3
SEG9–SEG12
LOR31
0
1
R6
0
/SEG13–R6
3
/SEG16 mode selection
R6
0
–R6
3
SEG13–SEG16
LOR32
0
1
R7
0
/SEG17–R7
3
/SEG20 mode selection
R7
0
–R7
3
SEG17–SEG20
Figure 93 LCD Output Register 3 (LOR3)
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 94.
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
).
相關(guān)PDF資料
PDF描述
HD4074829 AS Microcomputer Incorporating a LCD controller/Driver Circuit(帶LCD控制/驅(qū)動電路的微計算機)
HD404828R AS Microcomputer Incorporating a LCD controller/Driver Circuit(帶LCD控制/驅(qū)動電路的微計算機)
HD404829R AS Microcomputer Incorporating a LCD controller/Driver Circuit(帶LCD控制/驅(qū)動電路的微計算機)
HD4048412 4-Bit Single-Chip Microcomputer
HD4048412FS 4-Bit Single-Chip Microcomputer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD4048212RFS 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a LCD controller/Driver Circuit
HD4048212RH 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a LCD controller/Driver Circuit
HD4048212RTF 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a LCD controller/Driver Circuit
HD4048212TF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404828FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller