User's Manual

GE910 Hardware User Guide
1vv0300962 Rev.12 2013-10-22
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 5 of 83
Mod. 0805 2011-07 Rev.2
Contents
1. Introduction ..................................................................................................................................................................... 7
1.1. Scope ........................................................................................................................................................................ 7
1.2. Audience .................................................................................................................................................................. 7
1.3. Contact Information, Support ................................................................................................................................... 7
1.4. Document Organization ........................................................................................................................................... 8
1.5. Text Conventions ..................................................................................................................................................... 9
1.6. Related Documents .................................................................................................................................................. 9
2. Overview ........................................................................................................................................................................ 10
3. GE910 module connections .......................................................................................................................................... 11
3.1. PIN-OUT ................................................................................................................................................................ 11
3.2. Important Pin-out to Debug in customer’s application .......................................................................................... 15
3.3. LGA PADs Layout ................................................................................................................................................. 16
4. Hardware Commands................................................................................................................................................... 17
4.1. Turning ON the GE910 .......................................................................................................................................... 17
4.2. Turning OFF the GE910 ........................................................................................................................................ 21
4.3. HW Unconditional Shutdown on GE910 ............................................................................................................... 23
5. Power Supply ................................................................................................................................................................. 25
5.1. Power Supply Requirements .................................................................................................................................. 25
5.2. Power Consumption ............................................................................................................................................... 26
5.2.1. Power consumption Plots .............................................................................................................................. 27
5.3. General Design Rules ............................................................................................................................................. 31
5.3.1. Electrical Design Guidelines ......................................................................................................................... 31
5.3.2. Thermal Design Guidelines ........................................................................................................................... 34
5.3.3. Power Supply PCB layout Guidelines ........................................................................................................... 35
6. GSM Radio Section ....................................................................................................................................................... 36
6.1. GSM Antenna Requirements ................................................................................................................................. 36
6.2. GSM Antenna - PCB line Guidelines ..................................................................................................................... 37
6.3. PCB Guidelines in case of FCC certification ......................................................................................................... 38
6.3.1. Transmission line design ............................................................................................................................... 38
6.3.2. Transmission line measurements ................................................................................................................... 39
6.4. GSM Antenna - Installation Guidelines ................................................................................................................. 41
7. Global Navigation Satellite System (GE910-GNSS) ................................................................................................... 42
7.1. Principles of operation ........................................................................................................................................... 42
7.2. GNSS Signals Pinout ............................................................................................................................................. 43
7.3. Turning ON/OFF the GNSS module only in standalone mode .............................................................................. 43
7.4. RF Front End Design.............................................................................................................................................. 43
7.4.1. RF Signal Requirements ................................................................................................................................ 44
7.4.2. GNSS Antenna – PCB Line Guidelines ......................................................................................................... 44
7.4.3. GNSS Antenna Polarization .......................................................................................................................... 44
7.4.4. GNSS Antenna Gain ...................................................................................................................................... 45
7.4.5. Active versus Passive Antenna ...................................................................................................................... 45
7.4.6. RF Trace Losses ............................................................................................................................................ 46
7.4.7. Implications of the Pre-select SAW Filter ..................................................................................................... 46
7.4.8. External LNA Gain and Noise Figure ........................................................................................................... 46