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3. TECHNICAL BRIEF
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Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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3.19 Touch Module
Touch module is connected to Main PCB with 10-pin connector.
The Touch module is controlled by I2C Interface in T20.
Figure. Schematic of Touch connector (Main Board)
Pin No.
Signal
description
1
V_TCH_POWER
Power supply for driver IC
2
TOUCH_INT_N
Interrupt
3
TOUCH_I2C_SDA
I2C data
4
TOUCH_I2C_SCL
I2C clock
5
TOUCH_RESET_N
Reset
6
V_TCH_POWER
Power supply for driver IC
7
GND
-
8
GND
-
9
GND
-
10
TOUCH_ID
Maker ID
Table. Interface between Touch Module and MAIN Board
0.1u
C913
30
9
R
I
N
D
CN900
6
5
7
4
8
3
9
2
10
1
V_TCH_POWER
V_TCH_3V3
TOUCH_INT_N
TOUCH_RESET_N
TOUCH_I2C_SCL
TOUCH_I2C_SDA
TOUCH_ID