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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
MSM6280
G23
BT_CLK_GPIO25
F23
BT_SBST_GPIO24
E26
BT_SBCK_GPIO23
E25
BT_SBDT_GPIO22
H21
BT_TX_RX_N_GPIO21
R19
BT_DATA_GPIO20
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TOUCH_PENIRQ_N
TOUCH_I2C_SDA
TSC2007
TOUCH_I2C_SCL
Figure. Touch Screen Interface
TOUCH_VDD_2.8V
BT_HOST_WAKEUP
LIN_MOTOR_EN
WLAN_HOST_WAKEUP
TOUCH_PENIRQ_N
TOUCH_I2C_SCL
TOUCH_PENIRQ_N
TOUCH_I2C_SDA
X+
Y+
X-
Y-
- 91 -
3. TECHNICAL BRIEF
X+
Y+
X-
Y-
C702
C703
1u
0.1u
U703
A1
AUX
A2
VDD_REF
A3
X+
B1
PENIRQ-
B2
A0
B3
Y+
TOUCH SCREEN DRIVER IC
TOUCH
CONNECTOR
TSC2007IYZGR
C1
SDA
TOUCH_I2C_SDA
C2
A1
C3
X-
D1
SCL
TOUCH_I2C_SCL
D2
GND
D3
Y-
EUSY0337101
LGE Internal Use Only
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