Smart Module Series
SC690A_Series_Hardware_Design 58 / 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
DSI_LN3_N
DSI_LN2_P
DSI_ 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
LCD_VDD_2V8
LDO9_1V8
LCD_BL_A
LCD_BL_K1
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
Module
LCM
FL1
FL2
FL3
FL4
FL5
EMI filter
C3
C2
C1
NC
GND
GND
GND
GND
ADC
31
32
33
34
GND
LCD_BL_K2
LCD_TE
LCD_ RST
IN
EN
OUT
BP/FB
GND
C1
R1
C2
C3
B1
VPH_PWR
GPIO_09B
LCD_VDD_2V8
U1
100 nF 4.7
μ
F
1
μ
F
4.7
μ
F
10 K
1
μ
F
100 nF
Figure 17: 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 LCM module 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 please note that the output voltage of LCD_ID should not exceed the voltage
range of the ADC pin.