Manual

GE863 Hardware User Guide
1vv0300783 Rev.0 - 10/06/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 4 of 80
6.1 GE863-GPS SERIAL PORTS .............................................................................................................36
6.2 GE863-QUAD/PY/SIM SERIAL PORTS ..........................................................................................36
6.3 MODEM SERIAL P
ORT ....................................................................................................................37
6.4 GE863-GPS secondary ports
...............................................................................................................39
6.4.1 MODEM SERIAL PORT 2 (GPS CONTROL) ................................................................................................39
6.4.2 GPS SERIAL PORT A (SIRF BINARY)..........................................................................................................39
6.4.3 GPS SERIAL PORT B (NMEA).......................................................................................................................40
6.5 GE863-QUAD/PY/SIM secondary port..............................................................................................40
6.5.1 MODEM SERIAL PORT 2 (Python Debug).....................................................................................................40
6.6 RS232 Level Translation......................................................................................................................41
6.7 5V UART level translation
...................................................................................................................44
7 Audio Section Overview.................................................................................................................. 46
7.1 INPUT LINES (Microphone) ..............................................................................................................48
7.1.1 Short description................................................................................................................................................48
7.1.2 Input Lines Characteristics ................................................................................................................................49
7.2 OUTPUT LINES (Speaker).................................................................................................................50
7.2.1 Short description................................................................................................................................................50
7.2.2 Output Lines Characteristics..............................................................................................................................51
8 General Purpose I/O....................................................................................................................... 52
8.1 GPIO Logic levels .................................................................................................................................54
8.2 Using a GPIO Pad as INPUT
...............................................................................................................55
8.3 Using a GPIO Pad as OUTPUT
..........................................................................................................55
8.4 Using the RF Transmission Control
GPIO4 ......................................................................................55
8.5 Using the RFTXMON Output GPIO5
................................................................................................55
8.6 Using the Alarm Output
GPIO6 .........................................................................................................56
8.7 Using the Bu
zzer Output GPIO7 ........................................................................................................57
8.8 Magnetic Buzzer Concept
s ..................................................................................................................58
8.8.1 Short Description ...............................................................................................................................................58
8.8.2 Frequency Behaviour.........................................................................................................................................59
8.8.3 Power Supply Influence.....................................................................................................................................59
8.8.4 Warning .............................................................................................................................................................59
8.8.5 Working Current Influence................................................................................................................................59
8.9 Using the Temperature Monitor Function .........................................................................................60
8.9.1 Short Description ...............................................................................................................................................60
8.9.2 Allowed GPIO ...................................................................................................................................................60
8.10 Indication of network service availability ..........................................................................................61
9 RTC and Ausiliary supply .............................................................................................................. 62
9.1 RTC Bypass out ....................................................................................................................................62