User's Manual

M50Hardware Design
M50_HD_V2.0 - 4 -
3.10.3. Receiver and speaker interface design ...................................................................... 52
3.10.4. Earphone interface design.......................................................................................... 54
3.10.5. Loud speaker interface design ................................................................................... 54
3.10.6. Audio characteristics .................................................................................................. 55
3.11. SIM card interface ................................................................................................................ 55
3.11.1. SIM card application .................................................................................................. 55
3.11.2. 6 Pin SIM cassette ...................................................................................................... 57
3.11.3. 8 Pin SIM cassette ...................................................................................................... 58
3.12. SD card interface .................................................................................................................. 60
3.13. PCM interface ....................................................................................................................... 62
3.13.1. Configuration .............................................................................................................. 62
3.13.2. Timing ......................................................................................................................... 63
3.13.3. Reference design ........................................................................................................ 64
3.13.4. AT command .............................................................................................................. 64
3.14. ADC ....................................................................................................................................... 66
3.15. Behaviors of the RI............................................................................................................... 66
3.16. Network status indication..................................................................................................... 69
3.17. Operating status indication .................................................................................................. 69
4. Antenna interface........................................................................................................................... 71
4.1. RF reference design ................................................................................................................ 71
4.2. RF output power ..................................................................................................................... 72
4.3. RF receiving sensitivity.......................................................................................................... 72
4.4. Operating frequencies............................................................................................................. 72
4.5. RF cable soldering .................................................................................................................. 73
5. Electrical, reliability and radio characteristics ......................................................................... 74
5.1. Absolute maximum ratings .................................................................................................... 74
5.2. Operating temperature ............................................................................................................ 74
5.3. Power supply ratings .............................................................................................................. 75
5.4. Current consumption .............................................................................................................. 76
5.5. Electro-static discharge .......................................................................................................... 78
6. Mechanical dimensions ................................................................................................................ 79
6
.1. Mechanical dimensions of module ........................................................................................ 79
6.2. Recommended footprint without bottom centre pads .......................................................... 81
6.4. Top view of the module ......................................................................................................... 82
6.5. Bottom view of the module.................................................................................................... 83
7. Storage and manufacturing ......................................................................................................... 84
7.1. Storage ..................................................................................................................................... 84
7.2. Soldering ................................................................................................................................. 85
7.3. Packaging ................................................................................................................................ 86
Appendix A: GPRS coding schemes ............................................................................................. 87
Appendix B: GPRS multi-slot classes............................................................................................ 88
Quecctel
Confidential