SARA-G3 series - System Integration Manual
UBX-13000995 - A1 Advanced InformationPreliminary Contents
Page 5 of 161
1.13.5 FTP .............................................................................................................................................. 54
1.13.6 HTTP ........................................................................................................................................... 54
1.13.7 SMTP ........................................................................................................................................... 54
1.13.8 Smart temperature management ................................................................................................. 55
1.13.9 AssistNow clients and GPS/GNSS integration ............................................................................... 57
1.13.10 Hybrid positioning and CellLocateTM ......................................................................................... 58
1.13.11 Firmware upgrade Over AT (FOAT) .......................................................................................... 60
1.13.12 Firmware upgrade Over The Air (FOTA) .................................................................................... 60
1.13.13 In-Band modem (eCall / ERA-GLONASS) .................................................................................. 61
1.13.14 Power saving ........................................................................................................................... 61
2 Design-in ..................................................................................................................... 62
2.1 Supply interfaces ................................................................................................................................ 63
2.1.1 Module supply (VCC) .................................................................................................................. 63
2.1.2 RTC supply (V_BCKP) ................................................................................................................... 71
2.1.3 Interface supply (V_INT) ............................................................................................................... 73
2.2 System functions interfaces ................................................................................................................ 74
2.2.1 Module power-on (PWR_ON) ...................................................................................................... 74
2.2.2 Module reset (RESET_N) .............................................................................................................. 75
2.2.3 32 kHz signal (EXT32K and 32K_OUT) ......................................................................................... 76
2.3 Antenna interface ............................................................................................................................... 78
2.3.1 Antenna RF interface (ANT) ......................................................................................................... 78
2.3.2 Antenna detection interface (ANT_DET) ...................................................................................... 83
2.4 SIM interface ...................................................................................................................................... 86
2.5 Serial interfaces .............................................................................................................................. 9493
2.5.1 Asynchronous serial interface (UART)....................................................................................... 9493
2.5.2 Auxiliary asynchronous serial interface (UART AUX) ................................................................. 9796
2.5.3 DDC (I2C) interface .................................................................................................................. 9998
2.6 Audio Interface ........................................................................................................................... 102101
2.6.1 Analog Audio interface ....................................................................................................... 102101
2.6.2 Digital Audio interface ......................................................................................................... 108107
2.7 General Purpose Input/Output (GPIO) ......................................................................................... 109108
2.8 Reserved pins (RSVD) .................................................................................................................. 111110
2.9 Module placement...................................................................................................................... 111110
2.10 Module footprint and paste mask ........................................................................................... 112111
2.11 Thermal guidelines .................................................................................................................. 113112
2.12 ESD guidelines ........................................................................................................................ 115114
2.12.1 ESD immunity test overview ................................................................................................ 115114
2.12.2 ESD immunity test of u-blox SARA-G3 series reference designs ........................................... 115114
2.12.3 ESD application circuits ........................................................................................................ 116115
2.13 SARA-G350 ATEX integration in explosive atmospheres applications ...................................... 118117
2.13.1 General guidelines ............................................................................................................... 118117
2.13.2 Guidelines for VCC supply circuit design ............................................................................. 119118
2.13.3 Guidelines for antenna RF interface design .......................................................................... 120119