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4.10.1. MIPI Design Considerations
⚫
Special attention should be paid to the pin definition of LCM and camera interfaces. Different video
devices will have varied definitions for their corresponding connectors. Ensure that the devices and
the connectors are correctly connected.
⚫
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 video device, keep all the MIPI
traces of the same length. In order to avoid crosstalk, a spacing of 1.5 times the trace width is
recommended among MIPI signal lines. During impedance matching, do not connect GND on
different planes so as to ensure impedance consistency.
⚫
It is recommended to select a low capacitance TVS component for ESD protection and the
recommended parasitic capacitance should be below 1 pF.
⚫
Route MIPI traces according to the following rules:
a) Control the differential impedance to 100 Ω ±10 %.
b) Control intra-lane length difference within 0.5 mm.
c)
Control inter-lane length difference within 1.3 mm.
d)
The trace length inside the module should be considered when keeping MIPI traces of the same
length.
Table 22: MIPI Trace Length Inside Module
Pin No.
Pin Name
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
CSI0_CLK0_N
SC200K_Series_Hardware_Design
Length (mm)
58.51
58.32
58.09
58.06
58.24
57.74
59.55
59.16
58.94
58.72
20.39
Smart Module Series
Length Difference (mm)
0.19
0.03
0.5
0.39
0.22
0.47
63 / 105
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