Smart LTE Module Series
SC650T Hardware Design
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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
I/O
Description
Comment
LDO10_2P8
11
PO
2.8V output power supply for TP
VDD power
Vnorm=2.8V
I
O
max=150mA
LDO6_1P8
10
PO
1.8V output power supply
Pull-up power supply of I2C
Vnorm=1.8V
I
O
max=300mA
TP0_INT
139
DI
Interrupt signal of touch panel (TP0)
TP0_RST
138
DO
Reset signal of touch panel (TP0)
Active low
TP0_I2C_
SCL
140
OD
I2C clock signal of touch panel
(TP0)
TP0_I2C_
SDA
206
OD
I2C data signal of touch panel (TP0)
TP1_INT
137
DI
Interrupt signal of touch panel (TP1)
TP1_RST
136
DO
Reset signal of touch panel (TP1)
Active low
TP1_I2C_
SCL
205
OD
I2C clock signal of touch panel
(TP1)
TP1_I2C_
SDA
204
OD
I2C data signal of touch panel (TP1)
A reference design for touch panel interfaces is shown below.
