Product Info

Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 54 / 118
 For USB3.1，the Rx-to-Tx spacing should be three times the line width, Rx-and-Tx to other signals
spacing should be four times the line width;For USB2.0, the DP-to-DM spacing shouled be three
times the line width, DP-and-DM to other signals spacing should be four times line width.
 For DisplayPort, The routing length difference between DP_AUX_N and DP_AUX_P should be less
than 7mm.
Table 13: USB Trace Length Inside the Module
3.9.2. DP Interfaces
SC66 also supports DisplayPort mode with 4 lanes up to 4K@30ps. It should be noticed that Display
mode cannot be supported with USB1 together, but it can be used with USB2 together.
The differences between USB mode and DisplayPort Mode are listed below：
Pin No.
Signal
Length (mm)
Length Difference (DP-DM)
33
USB1_HS_DM
50.88
-0.32
32
USB1_HS_DP
51.20
171
USB_SS1_RX_P
39.96
0.00
172
USB_SS1_RX_M
39.96
174
USB_SS1_TX_P
39.69
-0.01
175
USB_SS1_TX_M
39.70
162
USB_SS2_RX_P
39.40
-0.18
161
USB_SS2_RX_M
39.57
165
USB_SS2_TX_P
39.85
-0.05
164
USB_SS2_TX_M
39.90
25
USB2_HS_DM
37.80
-0.26
26
USB2_HS_DP
37.54
220
DP_AUX_N
42.88
-0.94
221
DP_AUX_P
41.94