Smart Module Series
SC262R_Series_Hardware_Design 59 / 115
PWM
Module
2.2
μF
Backlight
driver
LCM_LED-
VBAT
C1
Figure 21: Reference Design for External Backlight Driving Circuit
3.19. Touch Panel Interface
SC262R series module provides one I2C interface for connection with Touch Panel (TP), and also
provides the corresponding power supply and interrupt pins. The definitions of TP interface pins are
illustrated below.
Table 21: Pin Definition of Touch Panel Interface
A reference circuit for the TP interface is shown below.
Pin Name
Pin No.
I/O
Description
Comment
LDO17_2V85
129
PO
2.85 V output power supply for
TP VDD
Vnom = 2.85 V
I
O
max = 450 mA
LDO6_1V8
125
PO
1.8 V output power supply for TP
I/O power domain and I2C
pull-up circuit
Vnom = 1.8 V
I
O
max = 150 mA
TP_INT
30
DI
TP interrupt
1.8 V
voltage domain.
TP_RST
31
DO
TP reset
1.8 V
voltage domain
.
Active low.
TP_I2C_SCL
47
OD
TP I2C clock
Externally pull them up to 1.8 V.
Can be used for other I2C
devices.
TP_I2C_SDA
48
OD
TP I2C data
