Telit Wireless Solutions LE910Cx - Page 7

LE910Cx Hardware User Guide
1VV0301298 Rev. 1.05 - 2017-06-18
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7.5. GNSS Antenna Requirements .......................................................................... 65
7.5.1. Combined GNSS Antenna ..................................................................... 65
7.5.2. Linear and Patch GNSS Antenna ........................................................... 65
7.5.3. Front End Design Considerations ......................................................... 65
7.5.4. GNSS Antenna – PCB Line Guidelines ................................................... 66
7.5.5. GNSS Antenna – Installation Guidelines ............................................... 67
8. Hardware Interfaces......................................................................................... 68
8.1. USB Port ........................................................................................................... 69
8.2. HSIC Interface .................................................................................................. 70
8.3. SGMII Interface (optional) ............................................................................... 70
8.3.1. Ethernet Control interface ................................................................... 70
8.4. Serial Ports ....................................................................................................... 71
8.4.1. Modem Serial Port 1 Signals ................................................................. 72
8.4.2. Modem Serial Port 2 ............................................................................. 73
8.4.3. RS232 Level Translation ........................................................................ 74
8.5. Peripheral Ports ............................................................................................... 76
8.5.1. SPI – Serial Peripheral Interface ........................................................... 76
8.5.2. I2C - Inter-integrated Circuit ................................................................ 77
8.5.3. SD/MMC Card Interface ....................................................................... 77
8.5.4. WiFi SDIO Interface .............................................................................. 79
8.6. Audio Interface ................................................................................................ 81
8.6.1. Digital Audio ......................................................................................... 81
8.6.1.1. Short Frame Timing Diagrams .............................................. 82
8.6.1.2. Long Frame Timing Diagrams ............................................... 84
8.7. General Purpose I/O ........................................................................................ 86
8.7.1. Using a GPIO Pad as Input .................................................................... 88
8.7.2. Using a GPIO Pad as an interrupt / Wakeup source ............................. 88
8.7.3. Using a GPIO Pad as Output ................................................................. 88
9. Miscellaneous Functions .................................................................................. 90
9.1. Indication of Network Service Availability ....................................................... 90