MeiG_SLM550_Hardware Design Manual
MeiG Smart Technology Co., Ltd
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4.17 Antenna Interface..................................................................................................................... 61
4.17.1 Main Antenna................................................................................................................. 61
4.17.2 DRX Antenna................................................................................................................. 62
4.17.3 GPS Antenna................................................................................................................. 63
4.17.4 Wi-Fi/BT antenna........................................................................................................... 63
5 PCB Layout ........................................................................................................................................ 65
5.1 Module PIN distribution............................................................................................................. 65
5.2 PCB Layout Principles .............................................................................................................. 65
5.2.1 Antenna........................................................................................................................... 65
5.2.2 Power Supply.................................................................................................................. 66
5.2.3 SIM Card......................................................................................................................... 66
5.2.4 MIPI................................................................................................................................. 66
5.2.5 USB................................................................................................................................. 67
5.2.6 Audio............................................................................................................................... 67
5.2.7 Safety clearance............................................................................................................. 68
6 Electrical, Reliability ......................................................................................................................... 69
6.1 Absolute Maximum.................................................................................................................... 69
6.2 Working Temperature................................................................................................................ 69
6.3 Working Voltage........................................................................................................................ 69
6.4 Digital Interface Features.......................................................................................................... 70
6.5 SIM_VDD Characteristics ......................................................................................................... 70
6.6 PWRKEY Feature ..................................................................................................................... 70
6.7 VCOIN Feature ......................................................................................................................... 71
6.8 Current Consumption (VBAT = 3.8V)........................................................................................ 71
6.9 Electrostatic Protection ............................................................................................................. 72
6.10 Module Operating Frequency Band......................................................................................... 72
6.11 RF Characteristics.................................................................................................................... 73
6.12 Module Conduction Receiving Sensitivity................................................................................ 74
6.13 WIFI Main RF Performance ..................................................................................................... 76
6.14 BT Main RF Prformance .......................................................................................................... 77
6.15 GNSS Main RF Performance .................................................................................................. 77
7 Production.......................................................................................................................................... 78
7.1 Top And Bottom Views Of The Module ..................................................................................... 78
7.2 Recommended Soldering Furnace Temperature Curve........................................................... 79
7.3 Humidity Sensitivity (MSL)........................................................................................................ 79
7.4 Baking Requirements................................................................................................................ 80
8 Support Peripheral Device List........................................................................................................ 81
9 Appendix ............................................................................................................................................ 83
9.1 Related Documents .................................................................................................................. 83
9.2 Terms and Explanations............................................................................................................ 83
9.3 Multiplexing function ................................................................................................................. 85
9.4 Safety Warning.......................................................................................................................... 87
