u-blox SARA-R4 Series System Integration Manual
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Contents
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SARA-R4 series - System Integration ManualUBX-16029218 - R06 ContentsPage 4 of 102ContentsPreface ................................................................................................................................ 3Contents.............................................................................................................................. 41 System description ....................................................................................................... 71.1 Overview .............................................................................................................................................. 71.2 Architecture .......................................................................................................................................... 91.3 Pin-out ............................................................................................................................................... 101.4 Operating modes ................................................................................................................................ 141.5 Supply interfaces ................................................................................................................................ 161.5.1 Module supply input (VCC) ......................................................................................................... 161.5.2 Generic digital interfaces supply output (V_INT) ........................................................................... 181.6 System function interfaces .................................................................................................................. 191.6.1 Module power-on ....................................................................................................................... 191.6.2 Module power-off ....................................................................................................................... 201.6.3 Module reset ............................................................................................................................... 211.7 Antenna interface ............................................................................................................................... 221.7.1 Antenna RF interface (ANT) ......................................................................................................... 221.7.2 Antenna detection interface (ANT_DET) ...................................................................................... 231.8 SIM interface ...................................................................................................................................... 231.8.1 SIM interface ............................................................................................................................... 231.8.2 SIM detection interface ............................................................................................................... 231.9 Data communication interfaces .......................................................................................................... 241.9.1 UART interface ............................................................................................................................ 241.9.2 USB interface............................................................................................................................... 261.9.3 SPI interface ................................................................................................................................ 261.9.4 SDIO interface ............................................................................................................................. 271.9.5 DDC (I2C) interface ...................................................................................................................... 271.10 Audio .............................................................................................................................................. 271.11 General Purpose Input/Output ........................................................................................................ 281.12 Reserved pins (RSVD) ...................................................................................................................... 281.13 System features............................................................................................................................... 291.13.1 Network indication ...................................................................................................................... 291.13.2 Antenna supervisor ..................................................................................................................... 291.13.3 Dual stack IPv4/IPv6 ..................................................................................................................... 291.13.4 TCP/IP and UDP/IP ....................................................................................................................... 291.13.5 FTP .............................................................................................................................................. 291.13.6 HTTP ........................................................................................................................................... 301.13.7 Firmware update Over AT (FOAT) ................................................................................................ 301.13.8 Firmware update Over The Air (uFOTA) ....................................................................................... 301.13.9 Power saving ............................................................................................................................... 30 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