參數(shù)資料
型號: HD404628R
廠商: Hitachi,Ltd.
英文描述: AS Microcomputer Incorporating a DTMF Generator Circuit(微計算機(jī)帶雙音多頻發(fā)生器電路)
中文描述: 由于微機(jī)安裝有雙音多頻發(fā)電機(jī)斷路器(微計算機(jī)帶雙音多頻發(fā)生器電路)
文件頁數(shù): 110/155頁
文件大?。?/td> 549K
代理商: HD404628R
HD404629R Series
110
LCD Output Register 3 (LOR3: $01F):
Write-only register used to specify ports R5–R7 as pins SEG9–
SEG20 in 4-pin units (figure 100).
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 100 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 101.
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
HD4074629 AS Microcomputer Incorporating a DTMF Generator Circuit(微計算機(jī)帶雙音多頻發(fā)生器電路)
HD404629R AS Microcomputer Incorporating a DTMF Generator Circuit(微計算機(jī)帶雙音多頻發(fā)生器電路)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD404628RFS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404628RH 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:AS Microcomputer Incorporating a DTMF Generator Circuit
HD404628RTF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404628TF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD404629FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller