ME910C1 HW User Guide
1VV0301351 Rev.8 Page 6 of 99 2018-09-28
VAUX Power Output ................................................................... 35
RTC Supply ................................................................................ 35
5. DIGITAL SECTION .................................................................... 36
Logic Levels ................................................................................ 36
Power On.................................................................................... 36
Power Off.................................................................................... 41
Wake from deep sleep mode ...................................................... 43
Unconditional Shutdown ............................................................. 43
Fast power down ........................................................................ 47
5.6.1. Fast Shut Down by Hardware ..................................................... 47
5.6.2. Fast Shut Down by Software....................................................... 48
Communication ports .................................................................. 49
5.7.1. USB 2.0 HS ................................................................................ 49
5.7.2. SPI.............................................................................................. 50
5.7.3. Serial Ports ................................................................................. 51
5.7.3.1. Modem serial port 1 .................................................................... 51
5.7.3.2. Modem serial port 2 .................................................................... 53
5.7.3.3. RS232 level translation ............................................................... 54
General purpose I/O ................................................................... 55
5.8.1. Using a GPIO as INPUT ............................................................. 56
5.8.2. Using a GPIO as OUTPUT ......................................................... 57
5.8.3. Indication of network service availability ..................................... 57
External SIM Holder .................................................................... 58
ADC Converter ........................................................................... 58
6. RF SECTION .............................................................................. 60
Bands Variants ........................................................................... 60
TX Output power ......................................................................... 60
RX Sensitivity ............................................................................. 61
Antenna requirements................................................................. 66
6.4.1. PCB Design guidelines ............................................................... 70
6.4.2. PCB Guidelines in case of FCC Certification .............................. 72
6.4.2.1. Transmission line design ............................................................ 72
6.4.2.2. Transmission Line Measurements .............................................. 73
6.4.2.3. Antenna Installation Guidelines ................................................... 75
7. AUDIO SECTION ....................................................................... 76
Electrical Characteristics ............................................................. 76
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