Touch Panel Interfaces - Quectel SC66 Hardware Design

3.19. Touch Panel Interfaces

SC66 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 26: Pin Definition of Touch Panel Interfaces
Pin Name Pin No I/O
LDO11A_1P8 10 PO
LDO3B_2P8 12 PO
TP0_INT 139 DI
TP0_RST 138 DO
TP0_I2C_SCL
140 OD
SCL
TP0_I2C_SDA 206 OD
TP1_RST 136 DO
TP1_INT 137 DI
TP1_I2C_SCL 205 OD
TP1_I2C_SDA 204 OD
A reference design for TP0 interface is shown below.
SC66_Hardware_Design
Description
1.8V output power supply
2.8V output power supply for TP
Interrupt signal of touch panel (TP0)
Reset signal of touch panel (TP0)
I2C clock signal of touch panel
(TP0)
I2C data signal of touch panel (TP0)
Reset signal of touch panel (TP1)
Interrupt signal of touch panel (TP1)
I2C clock signal of touch panel
(TP1)
I2C data signal of touch panel (TP1)
Smart LTE Module Series
SC66 Hardware Design
Comment
Pull-up power supply of I2C
Vnorm=1.8V
I max=300mA
O
TP power supply
Vnom=2.8V
Iomax=600mA
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