SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R26 Contents
Page 5 of 217
Contents
Preface ................................................................................................................................ 4
Contents .............................................................................................................................. 5
1 System description ..................................................................................................... 10
1.1 Overview ............................................................................................................................................ 10
1.2 Architecture ........................................................................................................................................ 13
1.2.1 Internal blocks ............................................................................................................................. 15
1.3 Pin-out ............................................................................................................................................... 17
1.4 Operating modes ................................................................................................................................ 22
1.5 Supply interfaces ................................................................................................................................ 24
1.5.1 Module supply input (VCC) ......................................................................................................... 24
1.5.2 RTC supply input/output (V_BCKP) .............................................................................................. 33
1.5.3 Generic digital interfaces supply output (V_INT) ........................................................................... 34
1.6 System function interfaces .................................................................................................................. 35
1.6.1 Module power-on ....................................................................................................................... 35
1.6.2 Module power-off ....................................................................................................................... 39
1.6.3 Module reset ............................................................................................................................... 41
1.6.4 External 32 kHz signal input (EXT32K) ......................................................................................... 42
1.6.5 Internal 32 kHz signal output (32K_OUT) .................................................................................... 42
1.7 Antenna interface ............................................................................................................................... 43
1.7.1 Antenna RF interface (ANT) ......................................................................................................... 43
1.7.2 Antenna detection interface (ANT_DET) ...................................................................................... 44
1.8 SIM interface ...................................................................................................................................... 44
1.8.1 (U)SIM card interface ................................................................................................................... 44
1.8.2 SIM card detection interface (SIM_DET) ....................................................................................... 44
1.9 Serial interfaces .................................................................................................................................. 45
1.9.1 Asynchronous serial interface (UART) .......................................................................................... 46
1.9.2 Auxiliary asynchronous serial interface (AUX UART) ..................................................................... 59
1.9.3 USB interface .............................................................................................................................. 63
1.9.4 DDC (I
2
C) interface ...................................................................................................................... 66
1.10 Audio interface ............................................................................................................................... 68
1.10.1 Analog audio interface ................................................................................................................ 68
1.10.2 Digital audio interface ................................................................................................................. 70
1.10.3 Voice-band processing system ..................................................................................................... 72
1.11 General Purpose Input/Output (GPIO) ............................................................................................. 76
1.12 Reserved pins (RSVD) ...................................................................................................................... 80
1.13 System features............................................................................................................................... 81
1.13.1 Network indication ...................................................................................................................... 81
1.13.2 Antenna detection ...................................................................................................................... 81
1.13.3 Jamming detection ...................................................................................................................... 81
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