Usb Interface Design Considerations - Quectel SC66 Hardware Design

3.9.3. USB Interface Design Considerations

Table 15: USB Trace Length Inside the Module
Pin No. Signal
32 USB1_HS_DP
33 USB1_HS_DM
171 USB_SS1_RX_P
172 USB_SS1_RX_M
174 USB_SS1_TX_P
175 USB_SS1_TX_M
162 USB_SS2_RX_P
161 USB_SS2_RX_M
165 USB_SS2_TX_P
164 USB_SS2_TX_M
26 USB2_HS_DP
25 USB2_HS_DM
221 DP_AUX_P
220 DP_AUX_N
In order to ensure USB performance, please follow the following principles while designing USB interface.
SC66_Hardware_Design
Figure 16: USB2 Host
Length (mm) Length Difference (DP-DM)
46.15
44.95
39.75
39.75
35.75
35.75
31.6
31.6
37.7
37.3
40.75
40.95
41.95
41.05
Smart LTE Module Series
SC66 Hardware Design
1.20
0.00
0.00
0.16
0.40
-0.20
0.90
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