Smart Module Series
SA800U-WF Hardware Design
SA800U-WF_Hardware_Design 66 / 106
DSI1_CLK_P
LEDA
NC
LEDK
NC (SDA-TP)
VIO18
NC (VTP-TP)
DSI1_LN3_P
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
L
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
μ
F
Module
LCM
FL1
FL2
FL3
FL4
FL5
EMI filter
C3
NC
GND
GND
GND
GND
ADC_PMU_GPIO21
31
32
33
34
LCM1_LED-
100
4.7
μ
F
C2
C1
2.2
μ
F
LDO_IC
VBAT
C5
C4
100K
nF
LDO14A_1V88
GPIO
NC
2.2
μ
F
R1
Figure 23: Reference Circuit Design for LCM1 Interface
MIPI are high-speed signals. 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.
ICMEF112P900MFR is recommended.
When compatible design with other displays is required, 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 the ADC
pin.
SA800U-WF provides a backlight driving output which can be used to drive LCM backlight WLEDs
directly. The features are listed below:
Use the high voltage output (LCD_BL_A) for powering WLED strings, and the OVP voltage output is
29.6 V.
Support 4 current sink drivers (LCD_BL_K1, LCD_BL_K2, LCD_BL_K3, LCD_BL_K4), with
maximum sink current of up to 30 mA for each. 2 of them can be connected in parallel for powering
16 WLEDs and 4 of them for 32 WLEDs.
