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GE863-PRO
3
 Hardware User Guide 
 1vv0300773a Rev. 0 - 24/01/08  
  
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved 
 
page 2 of 64 
 
 
Contents 
 
1
 
Overview ........................................................................................................................... 6
 
2
 
GE863-PRO
3
 Mechanical Dimensions ............................................................................ 7
 
3
 
GE863-PRO
3
 module connections .................................................................................. 8
 
3.1 
BALL-OUT ................................................................................................................................ 8 
3.2 
BALLS LAYOUT ..................................................................................................................... 14 
3.3 
ARM Port IO multiplexing ....................................................................................................... 15 
4
 
Hardware Commands .................................................................................................... 18
 
4.1 
Turning ON the GE863-PRO
3
 GSM/GPRS Engine ................................................................ 18 
4.2 
Turning OFF the GE863-PRO
3
 GSM/GPRS Engine .............................................................. 20 
4.2.1
 
Hardware shutdown ........................................................................................................................20
 
4.3 
Hardware Unconditional Reboot of GSM/GPRS Engine ........................................................ 20 
4.4 
Turning ON/OFF the GE863-PRO
3
 ARM ............................................................................... 21 
5
 
Power Supply ................................................................................................................. 23
 
5.1 
GSM Power Supply Requirements ......................................................................................... 23 
5.2 
ARM Power Supply Requirements ......................................................................................... 24 
5.3 
VRTC Backup supply ............................................................................................................. 24 
5.4 
General Design Rules ............................................................................................................ 25 
5.4.1
 
Electrical design Guidelines ............................................................................................................25
 
5.4.1.1
 
+ 5V input Source Power Supply Design Guidelines .................................................................26
 
5.4.1.2
 
+ 12V input Source Power Supply Design Guidelines ...............................................................27
 
5.4.1.3
 
Battery Source Power Supply Design Guidelines ......................................................................28
 
5.4.1.4
 
Battery Charge control Circuitry Design Guidelines ...................................................................29
 
5.4.2
 
Thermal Design Guidelines ............................................................................................................31
 
5.4.3
 
Power Supply PCB layout Guidelines ............................................................................................32
 
6
 
Antenna ........................................................................................................................... 33
 
6.1 
GSM Antenna Requirements .................................................................................................. 33 
6.2 
GSM Antenna - PCB line Guidelines ...................................................................................... 34 
6.3 
GSM Antenna - installation Guidelines ................................................................................... 35 
6.4 
Electro Magnetic Interference - Guidelines ............................................................................ 35 
6.5 
Logic level specifications ........................................................................................................ 36 
6.5.1
 
GSM Reset signal ...........................................................................................................................38
 
7
 
Serial Ports ..................................................................................................................... 39
 
7.1 
MODEM SERIAL PORT ......................................................................................................... 39