Table of Contents
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3.21.
Audio Interfaces ....................................................................................................................... 57
3.21.1. Reference Circuit Design for Microphone ...................................................................... 58
3.21.2. Reference Circuit Design for Receiver Interface ........................................................... 58
3.21.3. Reference Circuit Design for Headphone Interface ....................................................... 59
3.21.4. Reference Circuit Design for Loudspeaker Interface..................................................... 59
3.21.5. Audio Interface Design Considerations ......................................................................... 59
3.22.
Emergency Download Interface .............................................................................................. 60
4
Wi-Fi and BT ....................................................................................................................................... 61
4.1.
Wi-Fi Overview ........................................................................................................................ 61
4.1.1.
Wi-Fi Performance ......................................................................................................... 61
4.2.
BT Overview ............................................................................................................................ 63
4.2.1.
BT Performance ............................................................................................................. 64
5
Antenna Interface ............................................................................................................................... 65
5.1.
Wi-Fi/BT Antenna Interface ..................................................................................................... 65
5.1.1.
Reference Design of RF Layout..................................................................................... 66
5.2.
Antenna Installation ................................................................................................................. 68
5.2.1.
Antenna Requirements .................................................................................................. 68
5.2.2.
Recommended RF Connector for Antenna Installation ................................................. 68
6
Electrical, Reliability and Radio Characteristics ............................................................................ 70
6.1.
Absolute Maximum Ratings ..................................................................................................... 70
6.2.
Power Supply Ratings ............................................................................................................. 70
6.3.
Charging Performance Specifications ..................................................................................... 71
6.4.
Operation and StorageTemperatures ...................................................................................... 71
6.5.
Current Consumption .............................................................................................................. 72
6.6.
Electrostatic Discharge ............................................................................................................ 73
7
Mechanical Dimensions .................................................................................................................... 74
7.1.
Mechanical Dimensions of the Module.................................................................................... 74
7.2.
Recommended Footprint ......................................................................................................... 76
7.3.
Top and Bottom Views of the Module ...................................................................................... 77
8
Storage, Manufacturing and Packaging .......................................................................................... 78
8.1.
Storage..................................................................................................................................... 78
8.2.
Manufacturing and Soldering .................................................................................................. 79
8.3.
Packaging ................................................................................................................................ 80
9
Appendix A References ..................................................................................................................... 82
SC20-WL_Hardware_Design
Smart Wi-Fi Module Series
SC20-WL Hardware Design
4 / 81
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