Telit Wireless Solutions GE864 Benutzerhandbuch
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