LG E900 Service Manual page 48

3.10.5 Touch Windows Interface
LG-E900 implemented TOUCH function by using capacitive sensing method.
Touch module has a synatics touch driver IC. Phone has only part for connection & I2C.
Touch Connector
TOUCH I2C controller ( FPGA )
U507 is FPGA IC. FPGA is used for interface converting EBI2 to I2C.
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TOUCH_INT
TOUCH_SCL
TOUCH_SDA
PIO3_1/DP00A
PIO3_2/DP00B
PIO3_3/DP01A
GBIN7/PIO3_4/DP01B
GBIN6/PIO3_5/DP02A
PIO3_6/DP02B
PIO3_7/DP03B
PIO3_8/DP03A
VCCIO_3
Figure. Touch window Sensor Schematic
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GND
C8
TOUCH_SDA
C9
TOUCH_SCL
D8
D9
E9
F9
E8
F8
B8
A3
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3. TECHNICAL BRIEF
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LGE Internal Use Only