Mipi Design Considerations - Quectel SC200L Series Hardware Design

3.18.1. MIPI Design considerations

⚫
Pay attention to the pin definitions of LCM and camera connectors to ensure they are connected
correctly.
⚫
MIPI are high-speed signal lines, supporting maximum data rate up to 1.5 Gbps. The differential
impedance should be controlled to 100 Ω. Additionally, it is recommended to route the trace on the
inner layer of PCB, and do not cross it with other traces. For the same group of DSI or CSI signals, all
the MIPI traces should be of the same length. To avoid crosstalk, a distance of 1.5 times the trace
width among MIPI signal lines is recommended. During impedance matching, do not connect GND
on different planes to ensure impedance consistency.
⚫
It is recommended to select a low capacitance TVS for ESD protection and the recommended
parasitic capacitance should be below 1 pF.
⚫
Route MIPI traces according to the following rules:
a) The total trace length should not exceed 75 mm;
b) Control the differential impedance within 100 Ω ± 10%;
c) Control intra-lane length difference within 0.5 mm;
d) Control inter-lane length difference within 1.3 mm.
Table 24: MIPI Trace Length Inside the Module
Pin Name Pin No.
52 DSI_CLK_N
53 DSI_CLK_P
54 DSI_LN0_N
55 DSI_LN0_P
56 DSI_LN1_N
57 DSI_LN1_P
58 DSI_LN2_N
59 DSI_LN2_P
60 DSI_LN3_N
61 DSI_LN3_P
63 CSI1_CLK_N
64 CSI1_CLK_P
SC200L_Series(Dual-band Wi-Fi)_Hardware_Design
Length (mm)
32.79
32.57
32.90
32.58
32.58
32.41
33.17
33.37
35.93
36.23
13.71
13.56
Smart Module Series
Length Difference (P - N)
-0.22
-0.32
-0.17
0.20
0.30
-0.15
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