Smart Module Series
SC200K_Series_Hardware_Design 56 / 105
The following figures show the reference design for LCM interface.
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
VDD28
VDDCAMIO
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
C 3
C2
C1
NC
GND
GND
GND
GND
GPIO_XX
31
32
33
34
DSI
C4
100 nF
GND
Figure 21: Reference Circuit Design for LCM Interface
MIPI are high-speed signal lines. It is recommended to add common-mode filter in series near the LCM
connector to reduce electromagnetic radiation interference.
It is recommended to read the LCM ID register through MIPI when compatible design with other display
screens is required. If the multiple LCMs use the same IC, it is recommended that LCM module factory
should burn an OTP register to distinguish different screens. You can also connect the LCD_ID pin of
LCM to the GPIOs of the module to distinguish different screens by level detection. Note that the output
voltage of LCD_ID should not exceed the voltage range of the GPIOs.
You can design external backlight drive circuit for LCM according to actual requirement. The
corresponding reference design is shown in the figure below, in which PWM pin is used for backlight
brightness adjustment.
