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