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1.14.8
HTTP ........................................................................................................................................... 58
1.14.9
SSL/TLS ........................................................................................................................................ 59
1.14.10 Bearer Independent Protocol ....................................................................................................... 60
1.14.11 AssistNow clients and GNSS integration ...................................................................................... 60
1.14.13 Wi-Fi integration ......................................................................................................................... 63
1.14.14 Firmware upgrade Over AT (FOAT) .............................................................................................. 63
1.14.15 Firmware update Over The Air (FOTA) ......................................................................................... 64
1.14.16 Smart temperature management................................................................................................. 64
1.14.17 Power Saving .............................................................................................................................. 66
2
Design-in ..................................................................................................................... 67
2.1
Overview ............................................................................................................................................ 67
2.2
Supply interfaces ................................................................................................................................ 68
2.2.1
Module supply (VCC) .................................................................................................................. 68
2.2.2
RTC supply (V_BCKP) ................................................................................................................... 82
2.2.3
Interface supply (V_INT) ............................................................................................................... 84
2.3
System functions interfaces ................................................................................................................ 85
2.3.1
Module power-on (PWR_ON) ...................................................................................................... 85
2.3.2
Module reset (RESET_N) .............................................................................................................. 86
2.3.3
Module / host configuration selection ......................................................................................... 87
2.4
Antenna interface ............................................................................................................................... 88
2.4.1
Antenna RF interface (ANT1 / ANT2) ........................................................................................... 88
2.4.2
Antenna detection interface (ANT_DET) ...................................................................................... 95
2.5
SIM interface ...................................................................................................................................... 97
2.6
Data communication interfaces ........................................................................................................ 103
2.6.1
UART interface .......................................................................................................................... 103
2.6.2
USB interface ............................................................................................................................ 108
2.6.3
HSIC interface ........................................................................................................................... 110
2
2.6.4
C) interface .................................................................................................................... 112
2.6.5
SDIO interface ........................................................................................................................... 116
2.7
Audio interface ................................................................................................................................. 117
2.7.1
Digital audio interface ............................................................................................................... 117
2.8
General Purpose Input/Output (GPIO) ............................................................................................... 121
2.9
Reserved pins (RSVD) ........................................................................................................................ 122
2.10
Module placement ........................................................................................................................... 122
2.11
Module footprint and paste mask ..................................................................................................... 123
2.12
Thermal guidelines ........................................................................................................................... 124
2.13
ESD guidelines .................................................................................................................................. 125
2.13.1
ESD immunity test overview ...................................................................................................... 125
2.13.2
ESD immunity test of u-blox LARA-R2 series reference designs .................................................. 125
2.13.3
ESD application circuits .............................................................................................................. 126
2.14
Schematic for LARA-R2 series module integration ............................................................................. 128
2.15
Design-in checklist ............................................................................................................................ 129
2.15.1
Schematic checklist ................................................................................................................... 129
UBX-16010573 - R12
LARA-R2 series - System Integration Manual
®
.............................................................................................. 61
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