Telit Wireless Solutions GE864 Contents

GE864 Hardware User Guide
1vv0300694 Rev.10 - 10/06/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 3 of 69
Contents
1Overview...........................................................................................................................7
2GE864 Mechanical Dimensions ......................................................................................8
3GE864 module connections............................................................................................ 9
3.1PIN-OUT...................................................................................................................................9
3.1.1BGA Balls Layout........................................................................................................................... 13
4Hardware Commands ....................................................................................................15
4.1Turning ON the GE864-QUAD / PY......................................................................................15
4.2Turning OFF the GE864-QUAD / PY....................................................................................17
4.2.1Hardware shutdown....................................................................................................................... 17
4.2.2Hardware Unconditional Restart.................................................................................................... 17
5Power Supply .................................................................................................................19
5.1Power Supply Requirements...............................................................................................19
5.2General Design Rules ..........................................................................................................20
5.2.1Electrical Design Guidelines.......................................................................................................... 20
5.2.1.1+ 5V input Source Power Supply Design Guidelines................................................................ 20
5.2.1.2+ 12V input Source Power Supply Design Guidelines.............................................................. 21
5.2.1.3Battery Source Power Supply Design Guidelines..................................................................... 23
5.2.1.4Battery Charge control Circuitry Design Guidelines.................................................................. 24
5.2.2Thermal Design Guidelines........................................................................................................... 26
5.2.3Power Supply PCB layout Guidelines ...........................................................................................27
6Antenna...........................................................................................................................28
6.1GSM Antenna Requirements............................................................................................... 28
6.2GSM Antenna – PCB line Guidelines..................................................................................29
6.3GSM Antenna – Installation Guidelines..............................................................................30
7Logic level specifications..............................................................................................31
7.1Reset signal ..........................................................................................................................32
8Serial Ports..................................................................................................................... 33
8.1MODEM SERIAL PORT.........................................................................................................33
8.2RS232 level translation........................................................................................................ 35
8.35V UART level translation....................................................................................................37
9Audio Section Overview................................................................................................ 39
9.1INPUT LINES (Microphone) .................................................................................................40
9.1.1Short description............................................................................................................................ 40
9.1.2Input Lines Characteristics............................................................................................................ 41