Product Info
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- 1Introduction
- 2Product Concept
- 3Application 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 Interface
- 3.10.UART Interfaces
- 3.11.(U)SIM Interfaces
- 3.12.SD Card Interface
- 3.13.GPIO Interfaces
- 3.14.I2C Interfaces
- 3.15.ADC Interfaces
- 3.16.Motor Drive Interface
- 3.17.LCM Interface
- 3.18.Touch Panel Interface
- 3.19.Camera Interfaces
- 3.20.Sensor Interfaces
- 3.21.Audio Interfaces
- 3.22.Emergency Download Interface
- 4Wi-Fi and BT
- 5GNSS
- 6Antenna Interface
- 7Electrical, Reliability and Radio Characteristics
- 8Mechanical Dimensions
- 9Storage, Manufacturing and Packaging
- 10Appendix A References
- 11Appendix B GPRS Coding Schemes
- 12Appendix C GPRS Multi-slot Classes
- 13Appendix D EDGE Modulation and Coding Schemes
Smart LTE Module Series
SC20 Hardware Design
SC20_Hardware_Design Confidential / Released
6-77
/ 122
Table 35: Wi-Fi/BT Frequency
Type
Frequency
Unit
802.11a/b/g/n
2400~2482
5180~5825
MHz
BT4.1 LE
2402~2480
MHz
The supported Wi-Fi frequencies of SC20-J are 2400MHz~2496MHz and 5180MHz~5825MHz.
A reference circuit design for Wi-Fi/BT antenna interface is shown as below. A π-type matching circuit
should be reserved for better RF performance. The π-type matching components (R1, C1, C2) should be
placed as close to the antenna as possible and are mounted according to the actual debugging. C1 and
C2 are not mounted and a 0Ω resistor is mounted on R1 by default.
Figure 36: Reference Circuit Design for Wi-Fi/BT Antenna
6.3. GNSS Antenna Interface
The following tables show pin definition and frequency specification of GNSS antenna interface.
Table 36: Pin Definition of GNSS Antenna Interface
Pin Name
Pin No.
I/O
Description
Comment
ANT_GNSS
121
AI
GNSS antenna interface
50Ω impedance
NOTE