Smart LTE Module Series
SC650T Hardware Design
SC650T_Hardware_Design 65 / 131
DSI1_CLK_P
LEDA
NC
LEDK
LPTE
NC (SDA-TP)
VIO18
NC (VTP-TP)
DSI1_LN3_P
LCD1_TE
LCD1_RST
DSI1_LN3_N
DSI1_LN2_P
DSI1_CLK_N
DSI1_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
LDO 6_1P8
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
DSI1_LN1_N
DSI1_LN1_P
DSI1_LN0_N
DSI1_LN0_P
1
2
3
4
5
6
11
1
2
1
2
1
2
1
2
1 uF
Module
LCM
FL1
FL2
FL3
FL4
FL5
EMI filter
C3
NC
GND
GND
LCM_LED-
31
32
33
34
LCM _LED+
LCM _LED-
LCD_BIAS_P
LCD_BIAS_N
1uF
C1
10V
1uF
C2
10V
Figure 20: Reference Circuit Design for LCM1 Interface
MIPI are high speed signal lines. It is recommended that common-mode filters should be added in series
near the LCM connector, so as to improve protection against electromagnetic radiation interference.
When compatible design with other displays is required, please connect the LCD_ID pin of LCM to the
module’s ADC pin, and please note that the output voltage of LCD_ID cannot exceed the voltage range of
ADC pin.
The SC650T does not have an integrated backlight driver, and LCM requires an external backlight
driver.The reference circuit of external backlight drive is shown below, where the pin WLED_PWM
supports PWM output and can be used for backlight brightness adjustment.
152
WLED_PWM
Module
2.2uF
Backlight
Driver
LCM_LED-
VBAT
C1
Figure 21: Reference Design of LCM External Backlight Driving Circuit
