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3.20. Touch Panel Interfaces
SC650T provides two I2C interfaces for connection with Touch Panel (TP), and also provides the
corresponding power supply and interrupt pins. The pin definition of touch panel interfaces is illustrated
below.
Table 21: Pin Definition of Touch Panel Interfaces
Pin Name
Pin No
LDO10_2P8
11
LDO6_1P8
10
TP0_INT
139
TP0_RST
138
TP0_I2C_
140
SCL
TP0_I2C_
206
SDA
TP1_INT
137
TP1_RST
136
TP1_I2C_
205
SCL
TP1_I2C_
204
SDA
A reference design for touch panel interfaces is shown below.
SC650T_Hardware_Design
I/O
Description
2.8V output power supply for TP
PO
VDD power
PO
1.8V output power supply
DI
Interrupt signal of touch panel (TP0)
DO
Reset signal of touch panel (TP0)
I2C clock signal of touch panel
OD
(TP0)
OD
I2C data signal of touch panel (TP0)
DI
Interrupt signal of touch panel (TP1)
DO
Reset signal of touch panel (TP1)
I2C clock signal of touch panel
OD
(TP1)
OD
I2C data signal of touch panel (TP1)
Smart LTE Module Series
SC650T Hardware Design
Comment
Vnorm=2.8V
I
max=150mA
O
Pull-up power supply of I2C
Vnorm=1.8V
I
max=300mA
O
Active low
Active low
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