User's Manual

GE864-AUTO Hardware User Guide
1vv0300779 Rev.0 - 20/06/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 3 of 62
Contents
1 Overview ...........................................................................................................................6
2 GE864-AUTO Mechanical Dimensions ...........................................................................7
3 GE864-AUTO module connections .................................................................................8
3.1 PIN-OUT...................................................................................................................................8
3.1.1 BGA Balls Layout........................................................................................................................... 12
4 Hardware Commands ....................................................................................................14
4.1 Turning ON the GE864-AUTO module ................................................................................14
4.2 Turning OFF the GE864-AUTO ............................................................................................16
4.2.1 Hardware shutdown....................................................................................................................... 16
4.2.2 Hardware Unconditional Restart.................................................................................................... 16
5 Power Supply .................................................................................................................18
5.1 Power Supply Requirements...............................................................................................18
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
5.2.2 Thermal Design Guidelines ........................................................................................................... 24
5.2.3 Power Supply PCB layout Guidelines ........................................................................................... 25
6 Antenna...........................................................................................................................26
6.1 GSM Antenna Requirements ...............................................................................................26
6.2 GSM Antenna - PCB line Guidelines...................................................................................27
6.3 GSM Antenna - Installation Guidelines ..............................................................................28
7 Logic level specifications..............................................................................................29
7.1 Reset signal ..........................................................................................................................30
8 Serial Ports .....................................................................................................................31
8.1 MODEM SERIAL PORT.........................................................................................................31
8.2 RS232 level translation ........................................................................................................33
8.3 5V UART level translation....................................................................................................35
9 Audio Section Overview ................................................................................................37
9.1 INPUT LINES (Microphone) .................................................................................................38
9.1.1 Short description............................................................................................................................ 38
9.1.2 Input Lines Characteristics ............................................................................................................ 39