Rainbow Electronics GE863-PY - Manual (Page 3)

GE863 Hardware User Guide
1vv0300783 Rev.0 - 10/06/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 3 of 80
Contents
1 Overview............................................................................................................................................ 7
2 GE863 Mechanical Dimensions....................................................................................................... 8
3 GE863 module connections.............................................................................................................. 9
3.1 PIN-OUT .................................................................................................................................................9
3.2 PINS LAYOUT.....................................................................................................................................12
4 Hardware Commands..................................................................................................................... 13
4.1 Turning ON the GE863........................................................................................................................13
4.2 Turning OFF the GE863......................................................................................................................15
4.2.1 Hardware shutdown ...........................................................................................................................................15
4.2.2 Hardware Unconditional Shutdown (for GE863-GPS only)..............................................................................15
4.2.3 Hardware Unconditional Reboot (GE863-QUAD/PY/SIM only) .....................................................................17
4.3 Power Supply ........................................................................................................................................19
4.4 Power Supply Requirements ...............................................................................................................19
4.5 General Design Rules ...........................................................................................................................21
4.5.1 Electrical Design Guidelines..............................................................................................................................21
4.5.1.1 + 5V input Source Power Supply Design Guidelines ...............................................................................21
4.5.1.2 + 12V Input Source Power Supply Design Guidelines .............................................................................22
4.5.1.3 Battery Source Power Supply Design Guidelines .....................................................................................24
4.5.1.4 Battery Charge control Circuitry Design Guidelines ................................................................................25
4.5.2 Thermal Design Guidelines ...............................................................................................................................27
4.5.3 Power Supply PCB layout Guidelines ...............................................................................................................28
5 Antenna ........................................................................................................................................... 29
5.1 GSM Antenna Requirements ..............................................................................................................29
5.2 GSM Antenna - PCB line Guidelines..................................................................................................30
5.3 GSM Antenna - Installation Guidelines .............................................................................................31
5.4 GPS Antenna Requirements................................................................................................................31
5.4.1 Combined GPS Antenna....................................................................................................................................31
5.4.2 Linear and Patch GPS Antenna..........................................................................................................................31
5.4.3 LNA and Front End Design Considerations ......................................................................................................32
5.5 GPS Antenna - PCB Line Guidelines .................................................................................................33
5.6 GPS Antenna - Installation Guidelines...............................................................................................33
5.7 Logic level specifications ......................................................................................................................34
5.7.1 Reset signal........................................................................................................................................................35
6 Serial Ports...................................................................................................................................... 36