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
