Smart Module Series
SC262R_Series_Hardware_Design 58 / 115
A reference circuit for the LCM interface is shown below.
DSI_ CLK_P
LEDA
NC
LEDK
LPTE
NC (SDA-TP)
VIO18
NC (VTP-TP)
DSI _LN3_P
LCD_TE
LCD_ RST
DSI _LN3_N
DSI_LN2_P
_ CLK_N
DSI_LN2_N
RESET
LCD_ID
NC (SCL-TP)
NC (RST-TP)
NC (EINT-TP)
GND
VCC28
GND
MIPI_TDP3
MIPI_TDN3
GND
MIPI_TDP2
MIPI_TDN2
GND
MIPI_TDP1
MIPI_TDN1
GND
LDO17_2V85
LDO 6_1V8
LCM _ LED+
LCM _LED-
1
2
3
4
5
6
7
8
9
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
MIPI_TDP0
MIPI_TDN0
GND
MIPI_TCP
MIPI_TCN
29
28
30
3
4
5
6
3
4
5
6
3
4
5
6
3
4
5
6
DSI _LN1_N
DSI_LN1_P
DSI_LN0_N
DSI_LN0_P
1
2
3
4
5
6
11
1
2
1
2
1
2
1
2
100 nF
4.7
μF
1
μF
Module
LCM
FL1
FL2
FL3
FL4
FL5
EMI filter
C3
C2
C1
NC
GND
GND
GND
GND
GPIO_61
31
32
33
34
DSI
OUT
GND
IN
EN
1.8 V
VBAT
1
μF
10K
GND
Figure 20: Reference Circuit Design for LCM Interface
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.