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3. TECHNICAL BRIEF
3.12 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
ESM6270.
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 © 2008 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
ESM6270
MSM6280
TOUCH
CONNECTOR
X+
Y+
X-
Y-
TOUCH_I2C_SDA
TSC2007
TOUCH_I2C_SCL
TOUCH_PENIRQ_N
ESM6270
M21
M19
UART3_DP_TX_DATA_GPIO84
UART2_CTS_N_GPIO90
G6
E4
UART2_DP_TX_DATA_GPIO88
F4
UART2_RFR_N_GPIO91
UART3_CTS_N_GPIO86
L23
UART3_DP_RX_DATA_GPIO85
F14
F7
GPIO39
D6
GPIO64
TP200
TOUCH_PENIRQ_N
TOUCH_I2C_SDA
CAM_MODE2_N
TOUCH_I2C_SCL
USIM_DATA
USIM_CLK
USIM_RST_N
VA711
EVLC14S02050
VA709
EVLC14S02050
R702
NA
R700
0
C701
0.1u
EVLC14S02050
VA712
1u
C700
2.7K
R703
LCD_VDD_2.8V
R704
2.7K
D3
EVLC14S02050
VA710
A0
B2
C2
A1
AUX
A1
D2
GND
B1
PENIRQ-
SCL
D1
SDA
C1
A2
VDD_REF
X+
A3
X-
C3
Y+
B3
Y-
U700
TSC2007IYZGR
TOUCH_PENIRQ_N
TOUCH_I2C_SCL
TOUCH_I2C_SDA
Y-
Y+
X+
X-
Figure. Touch Screen Interface
Содержание KE990 - Viewty Cell Phone 100 MB
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