hardware design v1.00

Smart Machine Smart Decision
SIM968_Hardware Design_V1.00 2013.02.25
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4.8.2 Design Considerations for SIM Card Holder ...................................................................................... 34
4.9 LCD Display/SPI Interface..................................................................................................................... 36
4.10 Keypad Interface .................................................................................................................................... 36
4.11 ADC........................................................................................................................................................ 37
4.12 RI Behaviors........................................................................................................................................... 37
4.13 Network Status Indication ...................................................................................................................... 38
4.14 General Purpose Input/Output (GPIO) ................................................................................................... 39
4.15 External Reset......................................................................................................................................... 39
4.16 PWM ...................................................................................................................................................... 40
4.17 I
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C Bus.................................................................................................................................................... 40
4.18 GSM Antenna Interface.......................................................................................................................... 40
5 GNSS Application Interface........................................................................................................................... 42
5.1 Power Management ................................................................................................................................ 42
5.1.1 GNSS Power Input.............................................................................................................................. 42
5.1.2 Starting GNSS Engine......................................................................................................................... 42
5.1.3 Verification of GNSS Engine Start...................................................................................................... 42
5.1.4 Power Saving Modes........................................................................................................................... 42
5.1.5 Operating Mode .................................................................................................................................. 42
5.1.6 GPS_VANT_OUT and GPS_VANT_IN............................................................................................ 43
5.2 UART Interface ...................................................................................................................................... 44
5.3 1PPS Output ........................................................................................................................................... 44
5.4 A-GPS .................................................................................................................................................... 44
5.4.1 EPO ..................................................................................................................................................... 44
5.4.2 EASY MODE...................................................................................................................................... 45
5.4.3 SBAS and RTCM................................................................................................................................ 45
5.5 GNSS Antenna Interface ........................................................................................................................ 45
5.5.1 GNSS Antenna Interface..................................................................................................................... 45
5.5.2 GNSS Antenna Choice Consideration ................................................................................................ 46
5.5.3 Active antenna supervisor................................................................................................................... 47
6 Electrical, Reliability and Radio Characteristics......................................................................................... 49
6.1 Absolute Maximum Ratings................................................................................................................... 49
6.2 Recommended Operating Conditions..................................................................................................... 49
6.3 Digital Interface Characteristics ............................................................................................................. 49
6.4 SIM Card Interface Characteristics ........................................................................................................ 50
6.5 VDD_EXT Characteristics ..................................................................................................................... 50
6.6 SIM_VDD Characteristics...................................................................................................................... 51
6.7 VRTC Characteristics............................................................................................................................. 51
6.8 Current Consumption (VBAT = 3.8V) ................................................................................................... 51
6.9 Electro-Static Discharge ......................................................................................................................... 52
6.10 Radio Characteristics.............................................................................................................................. 53
6.10.1 Module RF Output Power................................................................................................................ 53
6.10.2 Module RF Receive Sensitivity ....................................................................................................... 54
6.10.3 Module Operating Frequencies........................................................................................................ 54
6.11 Module label information ....................................................................................................................... 55
Appendix ................................................................................................................................................................ 56
A. Related Documents.......................................................................................................................................... 56
B. Terms and Abbreviations ................................................................................................................................. 57