User's Manual

GE865 Hardware User Guide
1vv0300799 Rev.6 - 04/06/09
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 3 of 58
10.1 Short description ............................................................................................................... 38
10.2 Output Lines Characteristics ............................................................................................ 38
11 General Purpose I/O ....................................................................................................... 39
11.1 GPIO Logic levels .............................................................................................................. 40
11.2 Using a GPIO Pad as INPUT .............................................................................................. 41
11.3 Using a GPIO Pad as OUTPUT .......................................................................................... 41
11.4 Using the RF Transmission Control GPIO4 ..................................................................... 41
11.5 Using the RFTXMON Output GPIO5 ................................................................................. 41
11.6 Using the Alarm Output GPIO6 ......................................................................................... 42
11.7 Using the Buzzer Output GPIO7 ....................................................................................... 42
11.8 Indication of network service availability ......................................................................... 43
11.9 RTC Bypass out ................................................................................................................. 44
11.10 External SIM Holder Implementation ............................................................................ 44
12 DAC and ADC section .................................................................................................... 45
12.1 DAC Converter ................................................................................................................... 45
12.1.1 Description ..................................................................................................................................... 45
12.1.2 Enabling DAC ................................................................................................................................ 46
12.1.3 Low Pass Filter Example ............................................................................................................... 46
12.2 ADC Converter ................................................................................................................... 47
12.2.1 Description ..................................................................................................................................... 47
12.2.2 Using ADC Converter .................................................................................................................... 47
12.3 Mounting the GE865 on your Board ................................................................................. 48
12.3.1 General .......................................................................................................................................... 48
12.3.2 Module finishing & dimensions ...................................................................................................... 48
12.3.3 Suggested Inhibit Area .................................................................................................................. 49
12.3.4 Debug of the GE865 in production ................................................................................................ 50
12.3.5 Stencil ............................................................................................................................................ 50
12.3.6 PCB pad design ............................................................................................................................. 51
12.3.7 Solder paste ................................................................................................................................... 52
12.3.8 GE865 Solder reflow ...................................................................................................................... 53
12.4 Packing system .................................................................................................................. 54
12.4.1 Moisture sensibility ........................................................................................................................ 55
13 Conformity Assessment Issues .................................................................................... 56
14 SAFETY RECOMMANDATIONS ..................................................................................... 57
15 Document Change Log .................................................................................................. 58