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3. TECHNICAL BRIEF
3.14 Touch Screen Interface
The TSC2007 device has a 12-bit analog-to-digital resistive touch screen converter including drivers
and the control logic to measure touch pressure. The TSC2007 device is controlled by I2C port from
MSM6280.
Touch Screen interface scheme is shown in Figure.
And, there control signals are followed
• TOUCH_I2C_SCL : I2C CLOCK
• TOUCH_I2C_SDA : I2C DATA
• TOUCH_PENIRQ_N : DETECT
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
MSM6280
TOUCH
CONNECTOR
X+
Y+
X-
Y-
TOUCH_I2C_SDA
TSC2007
TOUCH_I2C_SCL
TOUCH_PENIRQ _N
BT_CLK_GPIO25
G23
R19
BT_DATA_GPIO20
BT_SBCK_GPIO23
E26
E25
BT_SBDT_GPIO22
BT_SBST_GPIO24
F23
H21
BT_TX_RX_N_GPIO21
LIN_MOTOR_EN
TOUCH_I2C_SDA
TOUCH_PENIRQ_N
WLAN_HOST_WAKEUP
TOUCH_I2C_SCL
BT_HOST_WAKEUP
EUSY0337101
TOUCH SCREEN DRIVER IC
R721
2.7K
TOUCH_VDD_2.8V
C702
1u
R723
DNI
VA714
EVLC14S02050
EVLC14S02050
VA713
EVLC14S02050
VA715
2.7K
R720
VA712
EVLC14S02050
D3
A0
B2
C2
A1
AUX
A1
D2
GND
B1
PENIRQ-
SCL
D1
SDA
C1
A2
VDD_REF
X+
A3
X-
C3
Y+
B3
Y-
U703
TSC2007IYZGR
C703
0.1u
X+
Y+
X-
Y-
TOUCH_PENIRQ_N
TOUCH_I2C_SCL
TOUCH_I2C_SDA
Figure. Touch Screen Interface