User's Manual

CE910-DUAL Hardware User Guide
1vv0301010 Rev .0 – 2012-07-10
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved. Page 6 of 63
5.2.6. Power Supply PCB layout Guidelines .............................................................................. 30
6. Antenna........................................................................................................................... 32
6.1. CDMA Antenna Requirements ................................................................................... 32
6.2. CDMA antenna – PCB line Guidelines ....................................................................... 33
6.3. CDMA Antenna installation Guidelines ........................................................................... 34
7. USB Port ......................................................................................................................... 35
8. Serial Port....................................................................................................................... 36
8.1. Modem Serial Port 1 .................................................................................................. 36
8.2. RS232 Level Translation ............................................................................................ 39
9. Audio Section Overview .................................................................................................. 41
9.1. MIC connection .......................................................................................................... 42
9.2. LIN-IN connection ...................................................................................................... 43
9.3. EAR connection .......................................................................................................... 44
10. General Purpose I/O .................................................................................................... 45
10.1. Logic Level Specification ........................................................................................ 46
10.2. Using a GPIO Pad as Input ...................................................................................... 47
10.3. Using a GPIO Pad as Output ................................................................................... 47
10.4. Using the Temperature Monitor Function ............................................................. 48
10.4.1. Short Description.............................................................................................................. 48
10.5. Indication of Network Service Availability .............................................................. 48
10.6. RTC Bypass Output ................................................................................................. 49
10.7. VAUX/PWRMON Power Output ............................................................................... 49
11. ADC section ................................................................................................................. 50
11.1. Description ............................................................................................................. 50
11.2. Using ADC Converter .............................................................................................. 50
12. Mounting the Module on your Board ........................................................................... 51
12.1. General ................................................................................................................... 51
12.2. Module Finishing & Dimensions ............................................................................ 51
12.3. Recommended foot print for the application ......................................................... 52