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PWM
Module
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
Pin Name
Pin No.
LDO17_2V85
129
LDO6_1V8
125
TP_INT
30
TP_RST
31
TP_I2C_SCL
47
TP_I2C_SDA
48
A reference circuit for the TP interface is shown below.
SC262R_Series_Hardware_Design
VBAT
C1
2.2 μF
I/O
Description
2.85 V output power supply for
PO
TP VDD
1.8 V output power supply for TP
PO
I/O power domain and I2C
pull-up circuit
DI
TP interrupt
DO
TP reset
OD
TP I2C clock
OD
TP I2C data
Backlight
driver
Comment
Vnom = 2.85 V
I
max = 450 mA
O
Vnom = 1.8 V
I
max = 150 mA
O
1.8 V voltage domain.
1.8 V voltage domain .
Active low.
Externally pull them up to 1.8 V.
Can be used for other I2C
devices.
Smart Module Series
LCM_LED+
LCM_LED-
59 / 115
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