Smart Module Series
SC200R&SC262R_Series_Hardware_Design 63 / 124
MIPI are high-speed signal lines. It is recommended to add common-mode filters in series near the LCM
connector, to improve protection against electromagnetic radiation interference.
It is recommended to read the LCM ID register through MIPI when compatible design with other displays
is required. If several LCMs share the same IC, it is recommended that the LCM factory should burn an
OTP register to distinguish different screens. You can also connect the LCD_ID pin of LCM to the ADC pin
of the module, but you need to make sure that the output voltage of LCD_ID should not exceed the
voltage range of the ADC pin.
You can design the external backlight driving circuit for LCM according to actual requirements. A
reference circuit design is shown in the following figure, in which the PWM pin is used to adjust the
backlight brightness.
PWM
Module
2.2
μF
Backlight
driver
LCM_LED-
VBAT
C1
Figure 20: Reference Design for External Backlight Driving Circuit
3.19. Touch Panel Interface
SC200R 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 24: Pin Definition of Touch Panel Interface
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