Product Info
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Concept
- 3 Application Interfaces
- 3.1. General Description
- 3.2. Pin Assignment
- 3.3. Pin Description
- 3.4. Power Supply
- 3.5. Turn on and off Scenarios
- 3.6. VRTC Interface
- 3.7. Power Output
- 3.8. Battery Charge and Management
- 3.9. USB Interfaces
- 3.10. UART Interfaces
- 3.11. (U)SIM Interfaces
- 3.12. SD Card Interface
- 3.13. GPIO Interfaces
- 3.14. I2C Interfaces
- 3.15. I2S Interfaces
- 3.16. SPI Interface
- 3.17. ADC Interfaces
- 3.18. LCM Interfaces
- 3.19. Touch Panel Interfaces
- 3.20. Camera Interfaces
- 3.21. Sensor Interfaces
- 3.22. Audio Interfaces
- 3.23. Emergency Download Interface
- 4 Wi-Fi and BT
- 5 GNSS
- 6 Antenna Interfaces
- 7 Electrical, Reliability and Radio Characteristics
- 8 Mechanical Dimensions
- 9 Storage, Manufacturing and Packaging
- 10 Appendix A References
- 11 Appendix B GPRS Coding Schemes
- 12 Appendix C GPRS Multi-slot Classes
- 13 Appendix D EDGE Modulation and Coding Schemes
- IC & FCC Requirement
Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 57 / 139
Figure 16: USB2 Host
3.9.3. USB Interface Design Considerations
Table 15: USB Trace Length Inside the Module
In order to ensure USB performance, please follow the following principles while designing USB interface.
Pin No. Signal Length (mm)
Length Difference (DP-DM)
32 USB1_HS_DP 46.15
1.20
33 USB1_HS_DM 44.95
171 USB_SS1_RX_P 39.75
0.00
172 USB_SS1_RX_M 39.75
174 USB_SS1_TX_P 35.75
0.00
175 USB_SS1_TX_M 35.75
162 USB_SS2_RX_P 31.6
0.16
161 USB_SS2_RX_M 31.6
165 USB_SS2_TX_P 37.7
0.40
164 USB_SS2_TX_M 37.3
26 USB2_HS_DP 40.75
-0.20
25 USB2_HS_DM 40.95
221 DP_AUX_P 41.95
0.90
220 DP_AUX_N 41.05