User's Manual
GE910 Hardware User Guide
GE910 Hardware User GuideGE910 Hardware User Guide
GE910 Hardware User Guide
1vv0300962 Rev.9-bis3 2013-05-20
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 5 of 87
Mod. 0805 2011-07 Rev.2
Contents
1.
Introduction.....................................................................................................................................................................8
1.1.
Scope........................................................................................................................................................................8
1.2.
Audience ..................................................................................................................................................................8
1.3.
Contact Information, Support...................................................................................................................................8
1.4.
Document Organization ...........................................................................................................................................9
1.5.
Text Conventions ...................................................................................................................................................10
1.6.
Related Documents ................................................................................................................................................10
2.
Overview........................................................................................................................................................................11
3.
GE910 module connections ..........................................................................................................................................12
3.1.
PIN-OUT................................................................................................................................................................12
3.2.
Important Pin-out to Debug in customer’s application ..........................................................................................16
3.3.
LGA PADs Layout.................................................................................................................................................17
4.
Hardware Commands...................................................................................................................................................18
4.1.
Turning ON the GE910..........................................................................................................................................18
4.2.
Turning OFF the GE910 ........................................................................................................................................22
4.3.
HW Unconditional Shutdown on GE910...............................................................................................................24
5.
Power Supply.................................................................................................................................................................26
5.1.
Power Supply Requirements ..................................................................................................................................26
5.2.
Power Consumption...............................................................................................................................................27
5.2.1.
Power consumption Plots ..............................................................................................................................28
5.3.
General Design Rules.............................................................................................................................................32
5.3.1.
Electrical Design Guidelines.........................................................................................................................32
5.3.2.
Thermal Design Guidelines...........................................................................................................................35
5.3.3.
Power Supply PCB layout Guidelines ...........................................................................................................36
6.
GSM Radio Section.......................................................................................................................................................38
6.1.
GSM Antenna Requirements .................................................................................................................................38
6.2.
GSM Antenna - PCB line Guidelines.....................................................................................................................39
6.3.
PCB Guidelines in case of FCC certification.........................................................................................................40
6.3.1.
Transmission line design ...............................................................................................................................40
6.3.2.
Transmission line measurements...................................................................................................................41
6.4.
GSM Antenna - Installation Guidelines .................................................................................................................43
7.
Global Navigation Satellite System (GE910-GNSS)...................................................................................................44
7.1.
Principles of operation ...........................................................................................................................................44
7.2.
GNSS Signals Pinout .............................................................................................................................................45
7.3.
Turning ON/OFF the GNSS module only in standalone mode..............................................................................45
7.4.
RF Front End Design..............................................................................................................................................45
7.4.1.
RF Signal Requirements................................................................................................................................46
7.4.2.
GNSS Antenna – PCB Line Guidelines .........................................................................................................46
7.4.3.
GNSS Antenna Polarization ..........................................................................................................................46
7.4.4.
GNSS Antenna Gain ......................................................................................................................................48
7.4.5.
Active versus Passive Antenna ......................................................................................................................48
7.4.6.
RF Trace Losses ............................................................................................................................................49
7.4.7.
Implications of the Pre-select SAW Filter .....................................................................................................49