User's Guide

ME910C1 HW User Guide
1VV0301351 Rev. 2 Page 6 of 81 2017-07-19
VAUX Power Output ................................................................... 29
5. DIGITAL SECTION .................................................................... 30
Logic Levels ................................................................................ 30
Power On.................................................................................... 30
Power Off.................................................................................... 36
Unconditional Shutdown ............................................................. 38
Fast power down ........................................................................ 41
5.5.1. Fast Shut Down by Hardware ..................................................... 41
5.5.2. Fast Shut Down by Software....................................................... 43
Communication ports .................................................................. 44
5.6.1. USB 2.0 HS ................................................................................ 44
5.6.2. SPI.............................................................................................. 45
5.6.2.1. SPI Connections ......................................................................... 45
5.6.2.2. Modem serial port 1 (USIF0) ....................................................... 46
5.6.2.3. Modem serial port 2 (USIF1) ....................................................... 48
5.6.2.4. RS232 level translation ............................................................... 48
General purpose I/O ................................................................... 49
5.7.1. Using a GPIO as INPUT ............................................................. 50
5.7.2. Using a GPIO as OUTPUT ......................................................... 51
5.7.3. Indication of network service availability ..................................... 51
External SIM Holder .................................................................... 53
ADC Converter ........................................................................... 53
6. RF SECTION .............................................................................. 54
Bands Variants ........................................................................... 54
TX Output power ......................................................................... 54
RX Sensitivity ............................................................................. 54
Antenna requirements................................................................. 54
6.4.1. PCB Design guidelines ............................................................... 56
6.4.2. PCB Guidelines in case of FCC Certification .............................. 58
6.4.2.1. Transmission line design ............................................................ 58
6.4.2.2. Transmission Line Measurements .............................................. 59
6.4.2.3. Antenna Installation Guidelines ................................................... 61
7. AUDIO SECTION ....................................................................... 62
Electrical Characteristics ............................................................. 62
Codec examples ......................................................................... 62
8. MECHANICAL DESIGN ............................................................. 63