M10 Hardware Design
M10_HD_V3.0 - 3 -
3.9.1. Decrease TDD noise and other noise ...................................................................... 47
3.9.2. Microphone interfaces configuration ....................................................................... 48
3.9.3. Receiver and speaker interface configuration .......................................................... 49
3.9.4. Earphone interface configuration ............................................................................ 51
3.10. SIM card interface ........................................................................................................... 52
3.10.1. SIM card application ............................................................................................. 52
3.10.2. Design considerations for SIM card holder ........................................................... 54
3.11. Keypad interface .............................................................................................................. 56
3.12. ADC................................................................................................................................. 57
3.13. Behaviors of the RI ......................................................................................................... 58
3.14. Network status indication ................................................................................................ 60
3.15. Operating status indication .............................................................................................. 61
3.16. General purpose input & output (GPIO) ......................................................................... 61
3.17. Open drain output (LIGHT_MOS) .................................................................................. 62
3.18. SD card interface ............................................................................................................. 63
4. Antenna interface ........................................................................................................................ 65
4.1. Antenna installation ........................................................................................................... 65
4.2. RF output power ................................................................................................................ 66
4.3. RF receiving sensitivity ..................................................................................................... 66
4.4. Operating frequencies ....................................................................................................... 66
4.5. Recommendation of RF pad welding ................................................................................ 66
5. Electrical, reliability and radio characteristics ............................................................................ 68
5.1. Absolute maximum ratings ................................................................................................ 68
5.2. Operating temperature ....................................................................................................... 68
5.3. Power supply ratings ......................................................................................................... 69
5.4. Current consumption ......................................................................................................... 70
5.5. Electro-static discharge ..................................................................................................... 72
6. Mechanical dimensions ............................................................................................................... 73
6.1. Mechanical dimensions of module .................................................................................... 73
6.2. Footprint of recommendation ............................................................................................ 75
6.3. Top view of the module .................................................................................................... 77
6.4. Bottom view of the module ............................................................................................... 77
Appendix A: GPRS coding schemes ............................................................................................... 78
Appendix B: GPRS multi-slot classes ............................................................................................. 79
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