- 92 -
3. TECHNICAL BRIEF
3.15 Ambient Light Sensor Interface
Ambient Light Sensor is controlled by Charge Pump.
Ambient Light Sensor interface scheme is shown in Figure.
And, there control signals are followed
• SSENS
• SBIAS
• GAIN1
• GAIN2
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
SBIAS
Charge
Pump
Ambient
Light
Sensor
SSENS
GAIN1
GAIN2
0603
EUSY0230104
VGA_VDD_2.7V
C330
1u
VGA_VDD_1.8V
1u
C333
10u
C329
1u
C336
F4
VBAT1
B5
VBATCP
VBATLDO
E1
VIO
E6
VOUT
B4
WPWMIN
D1
LED2
C2
LED3
C1
LED4
B1
B2
LED5
A2
LEDFL
LEDGND
B3
C4
RESETB
SBIAS
F5
D5
SCL
D4
SDA
E5
SGND
F3
SSENS
T1
A1
A6
T2
F6
T3
T4
F1
D6
C1N
C5
C1P
C2N
C6
C2P
B6
C3N
A4
C3P
A5
CPGND
A3
FLASHCNT
D3
GC1
E4
GC2
E3
LDO1O
F2
LDO2O
E2
D2
LED1
U301
BD6095GUL
0.1u
C331
0
R311
C332
1u
+VPWR
VREG_MSMP_2.7V
R312
0
C335
1u
C334
2.2u
R309
DNI
GAIN1
SBIAS
SSENS
GAIN2
CHARGEPUMP_RESET_N
WLED_1
I2C_SCL
I2C_SDA
WLED_2
WLED_4
WLED_PWR
WLED_3
WLED_5
Figure. Ambient Light Sensor Interface