參數(shù)資料
型號: UPD7225G01
廠商: NEC Corp.
英文描述: PROGRAMMABLE LCD CONTROLLER/DRIVER
中文描述: 可編程LCD控制器/驅(qū)動
文件頁數(shù): 19/52頁
文件大?。?/td> 289K
代理商: UPD7225G01
Data Sheet S14308EJ6V0DS00
19
μ
PD7225
4.
LCD DRIVE POWER SUPPLY PIN VOLTAGE SETTING
The bias method for setting the LCD drive power supply pin allows a different voltage to be supplied to each pin.
Figure 4-1. Voltage Setting
V
LC1
V
LC2
V
LC3
Static
V
DD
V
DD
V
LCD
V
DD
V
LCD
1/2 bias
V
DD
2
LCD
V
DD
1
LCD
V
DD
V
LCD
1/3 bias
V
DD
1
LCD
3
V
DD
1
LCD
V
DD
V
LCD
Remark
V
LCD
: LCD voltage
The following shows a circuit example which supplies voltages between VDD and VSS as the LCD drive reference
voltage.
(1) Static
V
LCD
R
1
=
×
R
2
V
DD
V
LCD
V
LCD
: LCD drive voltage
R
2
is used for contrast adjustment.
(2) Divide-by-2, -3 time division (1/2 bias)
V
LCD
R
1
=
×
R
2
2(V
DD
V
LCD
)
1
2
3
V
DD
V
DD
V
LC1
V
LC2
V
LC3
R
1
R
2
V
SS
GND
PD7225
μ
V
DD
V
DD
V
LC1
V
LC2
V
LC3
R
1
R
1
R
2
V
SS
GND
PD7225
μ
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