Hardware Design V1.00

Smart Machine Smart Decision
SIM2000S_Hardware_Design_V1.00 4 2014-02-27
4.8.1. PCM Multiplexing Function ............................................................................................................... 35
4.8.2. PCM Interface ..................................................................................................................................... 35
4.8.3. Auxiliary PCM (128 KHz PCM clock)............................................................................................... 35
4.8.4. Primary PCM (2048KHz PCM clock) ................................................................................................ 37
4.9. Keypad Interface.................................................................................................................38
4.9.1 Keypad Multiplexing Function ........................................................................................................... 39
4.10. I2C Bus ...............................................................................................................................39
4.10.1 I2C Multiplexing Function .............................................................................................................. 39
4.11. General Purpose Input/Output (GPIO) ...............................................................................40
4.12. ADC ....................................................................................................................................40
4.13. PWM ...................................................................................................................................40
4.14. Network Status Indication...................................................................................................41
4.15. NETLIGHT Multiplexing Function....................................................................................42
4.16. Operating Status Indication.................................................................................................42
4.16.1 STATUS Multiplexing Function...................................................................................................... 42
4.17. Antenna Interface................................................................................................................42
5. PCB Layout........................................................................................................ 44
5.1 Pin Assignment ...................................................................................................................44
5.2 Principle of PCB layout ......................................................................................................45
5.2.1 Antenna Interface................................................................................................................................ 45
5.2.2 Power Supply ...................................................................................................................................... 45
5.2.3 RUIM Card Interface .......................................................................................................................... 45
5.2.4 Audio Interface.................................................................................................................................... 45
5.2.5 Others .................................................................................................................................................. 45
6. Electrical, Reliability and Radio Characteristics...........................................46
6.1 Absolute Maximum Ratings ...............................................................................................46
6.2 Recommended Operating Conditions .................................................................................46
6.3 Digital Interface Characteristics..........................................................................................46
6.4 RUIM_VDD Characteristics...............................................................................................47
6.5 VDD_EXT Characteristics .................................................................................................47
6.6 Electro-Static Discharge .....................................................................................................47
6.7 Radio Characteristics ..........................................................................................................47
7. Manufacturing ...................................................................................................49
7.1. Top and Bottom View of SIM2000S ..................................................................................49
7.2. Typical Solder Reflow Profile ............................................................................................49
7.3. The Moisture Sensitivity Level...........................................................................................50
7.4. Baking Requirements..........................................................................................................50
8. Appendix.............................................................................................................51
I. Related Documents .............................................................................................................51
II. Terms and Abbreviations ....................................................................................................52
III. Safety Caution.....................................................................................................................53