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參數(shù)資料
| 型號： | UPD17201A |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS |
| 中文描述： | 4位單片機與LCD控制器/驅(qū)動器和A / D轉(zhuǎn)換器紅外遙控遞質(zhì) |
| 文件頁數(shù)： | 70/120頁 |
| 文件大?。?/td> | 516K |
| 代理商： | UPD17201A |
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μ
PD17201A, 17207
70
11.6
VOLTAGE BOOSTER CIRCUIT FOR LCD DRIVER
The
μ
PD17207 has a voltage booster circuit for LCD driver which prevents the LCD from flickering when the supply
voltage fluctuates.
Output signals V
LCD2
, V
LCD1
, and V
LCD0
of the segment and common signals are respectively two times (V
LCD1
),
three times (V
LCD2
), and equal to the output (reference voltage, V
LCD0
) of the reference voltage generator. The
reference voltage V
LCD0
can be adjusted by a resistor connected to the Reference Voltage Adjuster for LCD driver
pin V
LCDC
.
Figure 11-11 shows an example of a circuit of adjusting the reference voltage for the LCD driver. Figure 11-12
shows its operating principle.
Fig. 11-11 Reference Voltage Adjusting Circuit for LCD Driver (Example)
Caution When the power is switched on, the LCD may light until the supply voltage stabilizes because
the voltages of the capacitors for the voltage regulator and driver are undefined. It is therefore
recommended that the all-light mode be used immediately after the power is switched on.
V
LCD2
V
LCD1
V
LCD0
CAPH
V
LCDC
CAPL
PD17207
μ
R1
R2
C2
C3
C4
C1
R1 + R2 = 2M
C1 = C2 = C3 = C4 = 0.47 F
Reference voltage V
LCD0
can be adjusted
by resistors R1 and R2.
Where V
LCDC
= 0.6 V,
V
LCD0
= R1 + R2
R2
V
LCD1
= 2
×
V
LCD0
(V)
V
LCD2
= 3
×
V
LCD0
(V)
×
0.6 (V)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD17201AGF | 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS |
| UPD17207 | 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS |
| UPD17207GF | 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS |
| UPD17202AGF-011 | Circular Connector; No. of Contacts:56; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:25-4 RoHS Compliant: No |
| UPD17202AGF-011-3BE | Circular Connector; No. of Contacts:56; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:25-4 RoHS Compliant: No |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD17201AGF | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS |
| UPD17201AGF-XXX-3B9 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| UPD17202A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UPD17202AGF-011 Preliminary Data Sheet | Data Sheet[05/1997] |
| UPD17202AGF-011 | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND KEY SCAN CIRCUIT FOR FPC FRONT PANEL CONTROLLER |
| UPD17202AGF-011-3BE | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND KEY SCAN CIRCUIT FOR FPC FRONT PANEL CONTROLLER |
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