Smart Module Series
SC200L_Series(Dual-band Wi-Fi)_Hardware_Design 57 / 111
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.
Length (mm)
Length Difference (P - N)
52
DSI_CLK_N
32.79
-0.22
53
DSI_CLK_P
32.57
54
DSI_LN0_N
32.90
-0.32
55
DSI_LN0_P
32.58
56
DSI_LN1_N
32.58
-0.17
57
DSI_LN1_P
32.41
58
DSI_LN2_N
33.17
0.20
59
DSI_LN2_P
33.37
60
DSI_LN3_N
35.93
0.30
61
DSI_LN3_P
36.23
63
CSI1_CLK_N
13.71
-0.15
64
CSI1_CLK_P
13.56
