User Manual

GE863-PRO
3
Hardware User Guide
1vv0300773a Rev. 1 DRAFT - 24/04/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 2 of 82
Contents
1 Overview ...........................................................................................................................7
2 GE863-PRO
3
Mechanical Dimensions ............................................................................8
3 GE863-PRO
3
module connections..................................................................................9
3.1 BALL-OUT............................................................................................................................. 9
3.2 BALLS LAYOUT .................................................................................................................. 15
3.3 ARM Port IO multiplexing..................................................................................................... 16
4 Hardware Commands ....................................................................................................19
4.1 Turning ON the GE863-PRO
3
GSM Engine ......................................................................... 19
4.2 Turning OFF the GE863-PRO
3
GSM Engine ....................................................................... 21
4.2.1 Hardware shutdown........................................................................................................................21
4.3 Hardware Unconditional Reboot of GSM Engine ................................................................. 21
4.4 Turning ON/OFF the GE863-PRO
3
ARM ............................................................................. 22
5 Power Supply..................................................................................................................24
5.1 GSM Power Supply Requirements....................................................................................... 24
5.2 ARM Power Supply Requirements....................................................................................... 25
5.3 VRTC Backup supply........................................................................................................... 25
5.4 General Design Rules.......................................................................................................... 26
5.4.1 Electrical design Guidelines............................................................................................................26
5.4.1.1 + 5V input Source Power Supply Design Guidelines .................................................................27
5.4.1.2 + 12V input Source Power Supply Design Guidelines ...............................................................28
5.4.1.3 Battery Source Power Supply Design Guidelines ......................................................................30
5.4.1.4 Battery Charge control Circuitry Design Guidelines ...................................................................30
5.4.2 Thermal Design Guidelines ............................................................................................................32
5.4.3 Power Supply PCB layout Guidelines ............................................................................................33
6 Antenna...........................................................................................................................34
6.1 GSM Antenna Requirements ............................................................................................... 34
6.2 GSM Antenna - PCB line Guidelines.................................................................................... 35
6.3 GSM Antenna - installation Guidelines................................................................................. 36
6.4 Electro Magnetic Interference - Guidelines .......................................................................... 36
6.5 Logic level specifications ..................................................................................................... 37
6.5.1 GSM Reset signal...........................................................................................................................39
7 Serial Ports .....................................................................................................................40
7.1 MODEM SERIAL PORT ...................................................................................................... 40