User's Manual

DE910 Series Hardware User Guide
1vv0301183 Rev.1 – 2015-2-13
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Reserved. Page 6 of 70
6. Antenna ..................................................... 34
6.1. CDMA Antenna Requirements ................................ 34
6.1.1. CDMA antenna – PCB line Guidelines ......................... 35
6.1.2. PCB Guidelines in case of FCC certification ................ 36
6.1.3. CDMA Antenna – Installation Guidelines ..................... 38
6.2. GNSS Antenna Requirements ................................ 39
6.2.1. Combined GNSS Antenna ...................................... 39
6.2.2. Linear and Patch GNSS Antenna .............................. 39
6.2.3. The Design Considerations to enhanced GNSS performance ..... 39
6.2.4. GNSS Antenna – PCB Line Guidelines ......................... 42
6.2.5. GNSS Antenna – Installation Guidelines ..................... 42
7. USB Port .................................................... 43
8. Serial Port ................................................. 44
8.1. Modem Serial Port 1 ...................................... 45
8.2. Modem Serial Port 2 ...................................... 46
8.3. RS232 Level Translation .................................. 46
9. Audio Section Overview ...................................... 49
9.1. Electrical Characteristics ............................... 49
9.1.1. CODEC Example .............................................. 49
10. General Purpose I/O ......................................... 50
10.1. Logic Level Specification .............................. 51
10.2. Using a GPIO Pad as Input .............................. 51
10.3. Using a GPIO Pad as Output ............................. 52
10.4. Using the Temperature Monitor Function ................. 52
10.4.1. Short Description ........................................ 52
10.5. Indication of Network Service Availability ............. 53
10.6. VCOIN .................................................. 54
10.7. VCC_1V8 Power Output ................................... 55
11. ADC section ................................................. 56
11.1. ADC Converter .......................................... 56
11.1.1. Description .............................................. 56
11.1.2. Using ADC Converter ...................................... 56
12. Test Point .................................................. 57