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FIBOCOM SU806 Series Hardware Guide
Page 46 of 91
LCM design notice:
1) MIPI is a high-speed signal. It is recommended to connect the common mode inductor in series near
the LCD connector to reduce the electromagnetic interference of the circuit.
2) MIPI routing is recommended to be in the inner layer, with three-dimensional grounding;
3) The MIPI signal needs to be controlled with a differential impedance of 100
Ω tolerance ±10%;
4) The total length of the trace must
≤70mm, VIAs≤4;
5) The intra lane match of MIPI differential pair signal must
≤ 0.5mm;
6) The inter lane match of MIPI signal must
≤ 2mm;
7) It is recommended that the space of intra lane should be 1.5 times trace width and the differential
cable should keep 3 times trace width from other cable;
8) The parasitic capacitance of differential signal must not exceed 1.0pF;
Table 3-20 Length of MIPI_DSI differential signal line in module
Pin Name
Pin
Number
Length (mm)
Length Difference (DP-DM) mm
MIPI_DSI0_CLK_N
52
62.96494
0.03838
MIPI_DSI0_CLK_P
53
63.00332
MIPI_DSI0_LN0_N
54
62.71304
-0.27227
MIPI_DSI0_LN0_P
55
62.44077
MIPI_DSI0_LN1_N
56
62.22446
0.32383
MIPI_DSI0_LN1_P
57
62.54829
MIPI_DSI0_LN2_N
58
62.8235
0.1031
MIPI_DSI0_LN2_P
59
62.9266
MIPI_DSI0_LN3_N
60
63.84148
-0.39457
MIPI_DSI0_LN3_P
61
63.44691
3.16 TP
SU806 series module provides one I2C interface can be used to connect the touch panel and it provides
