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Download GM862-QUAD / PY Hardware User Guide
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GM862-QUAD / PY Hardware User Guide 1vv0300748 Rev. 5 - 20/09/07 Contents 1 Overview ........................................................................................................................... 6 2 Dimensions ....................................................................................................................... 7 3 Interface connectors on GM862-QUAD / PY .................................................................. 8 3.1 Description .............................................................................................................................. 8 3.2 Connectors Position .............................................................................................................. 8 3.3 Board to Board Connector .................................................................................................... 9 Molex 52991-0508 (male) GM862 Connector PIN-OUT ................................................................10 Antenna Connector .........................................................................................................................12 3.3.1 3.3.2 4 Antenna ........................................................................................................................... 13 4.1 GSM Antenna Requirements ............................................................................................... 13 4.2 GSM Antenna - Installation Guidelines .............................................................................. 14 4.3 Logic level specifications .................................................................................................... 14 Reset signal ....................................................................................................................................15 4.3.1 5 Hardware Commands .................................................................................................... 16 5.1 Turning ON the GM862-QUAD / PY ..................................................................................... 16 5.2 Turning OFF the GM862-QUAD / PY ................................................................................... 18 Hardware Shutdown .......................................................................................................................18 Hardware Unconditional Restart .....................................................................................................19 5.2.1 5.2.2 6 Power Supply .................................................................................................................21 6.1 Power Supply Requirements ............................................................................................... 21 6.2 General Design Rules .......................................................................................................... 22 6.2.1 Electrical Design Guidelines ...........................................................................................................22 6.2.1.1 + 5V input Source Power Supply Design Guidelines .................................................................22 6.2.1.2 + 12V input Source Power Supply Design Guidelines ...............................................................24 6.2.1.3 Battery Source Power Supply Design Guidelines ......................................................................26 6.2.1.4 Battery Charge control Circuitry Design Guidelines ...................................................................26 6.2.2 Thermal Design Guidelines ............................................................................................................28 6.2.3 Power Supply PCB layout Guidelines ............................................................................................29 7 8 Serial Ports ..................................................................................................................... 30 7.1 Level translation ................................................................................................................... 32 7.2 5V UART level translation .................................................................................................... 34 Audio Section Overview ................................................................................................ 36 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 2 of 68
