D7225G NEC, D7225G Datasheet - Page 19

• Manufacturer Part Number: D7225G
• Description: Search -----> UPD7225G
• Manufacturer: NEC

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4.
voltage.
(1) Static
(2) Divide-by-2, -3 time division (1/2 bias)
The bias method for setting the LCD drive power supply pin allows a different voltage to be supplied to each pin.
The following shows a circuit example which supplies voltages between VDD and VSS as the LCD drive reference
LCD DRIVE POWER SUPPLY PIN VOLTAGE SETTING
Remark
PD7225
PD7225
1/2 bias
1/3 bias
Static
V
V
V
V
V
V
V
V
V
V
V
LC1
LC2
LC3
LCD
LC1
LC2
LC3
DD
DD
SS
SS
: LCD voltage
R
R
R
R
R
1
1
2
1
2
V
V
V
GND
V
GND
DD
DD
DD
DD
Figure 4-1. Voltage Setting
Data Sheet S14308EJ6V0DS00
V
V
LC1
DD
1
2
1
3
V
V
LCD
LCD
V
V
DD
DD
V
R
R
DD
1
1
V
R
V
=
=
LCD
LC2
2
1
2
1
3
V
is used for contrast adjustment.
2(V
LCD
: LCD drive voltage
V
V
V
LCD
LCD
DD
DD
V
V
LCD
LCD
V
V
LCD
LCD
)
V
V
V
R
R
DD
DD
DD
2
2
V
LC3
V
V
V
LCD
LCD
LCD
PD7225
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