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
MSM6280.
Touch Screen interface scheme is shown in [Fig. 3.23]. and, there control signals are followed
❏
TOUCH_I2C_SCL : I2C CLOCK
❏
TOUCH_I2C_SDA : I2C DATA
❏
TOUCH_PENIRQ_N : DETECT
- 66 -
3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TOUCH SCREEN DRIVER IC
C104
0.1u
EVLC14S02050
VA101
VA102
EVLC14S02050
VA100
EVLC14S02050
VREG_TOUCH_2.8V
0.1u
C103
Y-
D3
A0
B2
C2
A1
AUX
A1
D2
GND
B1
PENIRQ-
SCL
D1
SDA
C1
A2
VDD_REF
X+
A3
X-
C3
Y+
B3
U100
TSC2007IYZGR
EVLC14S02050
VA103
1u
C102
TOUCH_PENIRQ_N
X+
Y-
X-
Y+
TOUCH_I2C_SCL
TOUCH_I2C_SDA
[Fig. 3.23] Touch Screen Interface
Содержание KF700
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Страница 193: ...Note ...
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