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參數(shù)資料
| 型號： | UPD16680P |
| 廠商： | NEC Corp. |
| 英文描述： | 1/53, 1/40 DUTY, LCD CONTROLLER/DRIVER WITH BUILT-IN RAM |
| 中文描述： | 1 / 53，1 / 40的責(zé)任，LCD控制器/驅(qū)動，配有內(nèi)存 |
| 文件頁數(shù)： | 13/44頁 |
| 文件大?。?/td> | 290K |
| 代理商： | UPD16680P |
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Data Sheet S12694EJ2V0DS00
13
μ
PD16680
5.3 REFERENCE VOLTAGE CIRCUIT
5.3.1 To use internal reference voltage circuit ( V
EXT
= L )
When internal driving circuit is chosen, 6 levels for LCD reference voltage (V
LC1
, V
LC2
, V
LC3
, V
LC4
, V
LC5
, V
SS
) is
generate by internal breeder resister.
5.3.2 To use external driving circuit ( V
EXT
= H )
When external driving circuit is chosen, operational amplifier incorporated IC is Off. It is necessary to input voltage
to V
LC1
, V
LC2
, V
LC3
, V
LC4
and V
LC5
directly.
Generally, These levels are made by external breeder resister. The display dignity of LCD declines when these
resistance values are big, it is necessary to choose the resistance value which corresponds with the LCD panel.
There is an effect that improves display dignity when connecting a capacitor with each level pins and the ground. It is
necessary to choose the condenser value which corresponds with the LCD panel.
Figure 5-3. Reference voltage circuit
V
LC1
R
to SEG, COM Outputs
V
LC2
R
to COM Output
V
LC3
R
to SEG Output
R
R
V
LCBS3
V
LCBS2
V
LC4
R
to SEG Output
V
LC5
R
to COM Output
AMP
OUT
to SEG, COM Output
V
LCBS1
V
SS
Voltage follower for level voltage
+
+
+
+
+
#
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|---|---|
| UPD16680W | 1/53, 1/40 DUTY, LCD CONTROLLER/DRIVER WITH BUILT-IN RAM |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD16680W | 制造商:NEC 制造商全稱:NEC 功能描述:1/53, 1/40 DUTY, LCD CONTROLLER/DRIVER WITH BUILT-IN RAM |
| UPD16681 | 制造商:NEC 制造商全稱:NEC 功能描述:LCD CONTROLLER/DRIVER FOR DOT MATRIX DISPLAY OF JIS LEVEL 1 AND JIS LEVEL 2 KANJI SETS |
| UPD16681A | 制造商:NEC 制造商全稱:NEC 功能描述:LCD CONTROLLER/DRIVER FOR DOT MATRIX DISPLAY OF JIS LEVEL 1 AND JIS LEVEL 2 KANJI SETS |
| UPD16681A-001 | 制造商:NEC 制造商全稱:NEC 功能描述:LCD CONTROLLER/DRIVER FOR DOT MATRIX DISPLAY OF JIS LEVEL 1 AND JIS LEVEL 2 KANJI SETS |
| UPD16681AP-001 | 制造商:NEC 制造商全稱:NEC 功能描述:LCD CONTROLLER/DRIVER FOR DOT MATRIX DISPLAY OF JIS LEVEL 1 AND JIS LEVEL 2 KANJI SETS |
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