User's Manual

ManualsBrandsu-blox ManualsElectronicsGSM/UMTS/HSPA Data and Voice Module

SARA-G3 and SARA-U2 series - System Integration Manual

UBX-13000995 - R18 Advance Information Contents

Page 4 of 206

Contents

Preface ................................................................................................................................ 3

Contents .............................................................................................................................. 4

1 System description ....................................................................................................... 8

1.1 Overview .............................................................................................................................................. 8

1.2 Architecture ........................................................................................................................................ 10

1.2.1 Internal blocks ............................................................................................................................. 12

1.3 Pin-out ............................................................................................................................................... 14

1.4 Operating modes ................................................................................................................................ 19

1.5 Supply interfaces ................................................................................................................................ 21

1.5.1 Module supply input (VCC) ......................................................................................................... 21

1.5.2 RTC supply input/output (V_BCKP) .............................................................................................. 30

1.5.3 Generic digital interfaces supply output (V_INT) ........................................................................... 31

1.6 System function interfaces .................................................................................................................. 32

1.6.1 Module power-on ....................................................................................................................... 32

1.6.2 Module power-off ....................................................................................................................... 35

1.6.3 Module reset ............................................................................................................................... 37

1.6.4 External 32 kHz signal input (EXT32K) ......................................................................................... 38

1.6.5 Internal 32 kHz signal output (32K_OUT) .................................................................................... 38

1.7 Antenna interface ............................................................................................................................... 39

1.7.1 Antenna RF interface (ANT) ......................................................................................................... 39

1.7.2 Antenna detection interface (ANT_DET) ...................................................................................... 40

1.8 SIM interface ...................................................................................................................................... 40

1.8.1 (U)SIM card interface ................................................................................................................... 40

1.8.2 SIM card detection interface (SIM_DET) ....................................................................................... 40

1.9 Serial interfaces .................................................................................................................................. 41

1.9.1 Asynchronous serial interface (UART)........................................................................................... 42

1.9.2 Auxiliary asynchronous serial interface (AUX UART) ..................................................................... 56

1.9.3 USB interface............................................................................................................................... 58

1.9.4 DDC (I

C) interface ...................................................................................................................... 62

1.10 Audio interface ............................................................................................................................... 64

1.10.1 Analog audio interface ................................................................................................................ 64

1.10.2 Digital audio interface ................................................................................................................. 66

1.10.3 Voice-band processing system ..................................................................................................... 68

1.11 General Purpose Input/Output (GPIO) ............................................................................................. 71

1.12 Reserved pins (RSVD) ...................................................................................................................... 75

1.13 System features............................................................................................................................... 76

1.13.1 Network indication ...................................................................................................................... 76

1.13.2 Antenna detection ...................................................................................................................... 76

1.13.3 Jamming detection ...................................................................................................................... 76