User's Manual
LE910 Hardware User Guide
1vv0301089 Rev.3 – 09-06-2014
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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
1.7 DOCUMENT HISTORY .......................................................................................................................................................... 10
2 OVERVIEW .............................................................................................................................................................. 11
3 LE910 MODULE CONNECTIONS................................................................................................................................ 12
3.1 PIN-OUT ......................................................................................................................................................................... 12
3.1.1 LGA Pads Layout ..................................................................................................................................................... 17
4 HARDWARE COMMANDS ........................................................................................................................................ 18
4.1 TURNING ON THE LE910 .................................................................................................................................................... 18
4.2 INITIALIZATION AND ACTIVATION STATE................................................................................................................................... 20
4.3 TURNING OFF THE LE910 ................................................................................................................................................... 21
4.3.1 Shutdown by Software Command .......................................................................................................................... 21
4.3.2 Hardware Shutdown .............................................................................................................................................. 22
4.4 LE910 UNCONDITIONAL SHUTDOWN ..................................................................................................................................... 23
4.5 SUMMARY OF TURNING ON AND OFF THE MODULE ................................................................................................................. 26
5 POWER SUPPLY ....................................................................................................................................................... 27
5.1 POWER SUPPLY REQUIREMENTS ............................................................................................................................................ 27
5.2 POWER CONSUMPTION ....................................................................................................................................................... 28
5.3 GENERAL DESIGN RULES ...................................................................................................................................................... 29
5.3.1 Electrical Design Guidelines ................................................................................................................................... 29
5.3.2 Thermal Design Guidelines ..................................................................................................................................... 33
5.3.3 Power Supply PCB layout Guidelines ...................................................................................................................... 34
6 GSM/WCDMA/LTE RADIO SECTION......................................................................................................................... 36
6.1 LE910 PRODUCT VARIANTS ................................................................................................................................................. 36
6.2 TX OUTPUT POWER ............................................................................................................................................................ 36
6.3 GSM/WCDMA/LTE ANTENNA REQUIREMENTS .................................................................................................................... 37
6.4 GSM/WCDMA/LTE - PCB LINE GUIDELINES ......................................................................................................................... 40
6.5 GSM/WCDMA/LTE ANTENNA - INSTALLATION GUIDELINES .................................................................................................... 41
6.6 ANTENNA DIVERSITY REQUIREMENTS ..................................................................................................................................... 41
7 GNSS RECEIVER ....................................................................................................................................................... 43
7.1 GNSS SIGNALS PINOUT ....................................................................................................................................................... 43
7.2 GPS/GLONASS ANTENNA REQUIREMENTS ............................................................................................................................ 43
7.2.1 GNSS Antenna - PCB Line Guidelines ...................................................................................................................... 44
7.2.2 RF Trace Losses....................................................................................................................................................... 44
7.2.3 GNSS Antenna - Installation ................................................................................................................................... 45
8 LOGIC LEVEL SPECIFICATIONS .................................................................................................................................. 46