User's Manual

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. GE865 MECHANICAL DIMENSIONS .......................................................................................................................... 11
4. GE865 MODULE CONNECTIONS ............................................................................................................................... 12
4.1. PIN-OUT ................................................................................................................................................................ 12
4.1.1. BGA Balls Layout .......................................................................................................................................... 15
5. HARDWARE COMMANDS ........................................................................................................................................ 16
5.1. TURNING ON THE GE865 ....................................................................................................................................... 16
5.2. TURNING OFF THE GE865 ...................................................................................................................................... 20
5.3. RESETTING THE GE865 ........................................................................................................................................... 22
5.3.1. Hardware Unconditional restart ................................................................................................................... 22
6. POWER SUPPLY ....................................................................................................................................................... 25
6.1. POWER SUPPLY REQUIREMENTS ............................................................................................................................. 25
6.2. POWER CONSUMPTION ............................................................................................................................................ 26
6.2.1. Power consumption Plots .............................................................................................................................. 27
6.3. GENERAL DESIGN RULES ........................................................................................................................................ 31
6.3.1. Electrical Design Guidelines ......................................................................................................................... 31
6.3.2. Thermal Design Guidelines ........................................................................................................................... 34
6.3.3. Power Supply PCB layout Guidelines ........................................................................................................... 35
7. ANTENNA ................................................................................................................................................................ 36
7.1. GSM ANTENNA REQUIREMENTS ............................................................................................................................ 36
7.2. GSM ANTENNA - PCB LINE GUIDELINES ................................................................................................................ 37
7.3. PCB GUIDELINES IN CASE OF FCC CERTIFICATION ................................................................................................. 38
7.3.1. Transmission line design ............................................................................................................................... 38
7.3.2. Transmission line measurements ................................................................................................................... 39
7.4. GSM ANTENNA - INSTALLATION GUIDELINES ........................................................................................................ 41
8. LOGIC LEVEL SPECIFICATIONS .................................................................................................................................. 42
8.1. RESET SIGNAL ......................................................................................................................................................... 43
9. SERIAL PORTS .......................................................................................................................................................... 44
9.1. MODEM SERIAL PORT ....................................................................................................................................... 44
9.2. RS232 LEVEL TRANSLATION ................................................................................................................................... 46
9.3. UART BEHAVIOUR ................................................................................................................................................. 49