Users Manual

ME910C1 HW User Guide
1VV0301351 Rev.13 Page 6 of 106 2020-06-30
VAUX Power Output ................................................................... 35
RTC Supply ................................................................................ 35
5. DIGITAL SECTION .................................................................... 36
Logic Levels ................................................................................ 36
Power On.................................................................................... 36
Power Off.................................................................................... 42
Wake from deep sleep mode ...................................................... 44
Unconditional Shutdown ............................................................. 44
Fast power down ........................................................................ 48
5.6.1. Fast Shut Down by Hardware ..................................................... 48
5.6.2. Fast Shut Down by Software....................................................... 49
Communication ports .................................................................. 50
5.7.1. USB 2.0 HS ................................................................................ 50
5.7.2. SPI.............................................................................................. 51
5.7.3. Serial Ports ................................................................................. 52
5.7.3.1. Modem serial port 1 .................................................................... 52
5.7.3.2. Modem serial port 2 .................................................................... 54
5.7.3.3. RS232 level translation ............................................................... 55
General purpose I/O ................................................................... 56
5.8.1. Using a GPIO as INPUT ............................................................. 57
5.8.2. Using a GPIO as OUTPUT ......................................................... 58
5.8.3. Indication of network service availability ..................................... 58
External SIM Holder .................................................................... 59
ADC Converter ........................................................................... 59
6. RF SECTION .............................................................................. 61
Bands Variants ........................................................................... 61
TX Output power ......................................................................... 61
RX Sensitivity ............................................................................. 62
Antenna requirements................................................................. 69
6.4.1. PCB Design guidelines ............................................................... 74
6.4.2. PCB Guidelines in case of FCC Certification .............................. 76
6.4.2.1. Transmission line design ............................................................ 76
6.4.2.2. Transmission Line Measurements .............................................. 77
6.4.2.3. Antenna Installation Guidelines ................................................... 79
7. AUDIO SECTION ....................................................................... 80
Electrical Characteristics ............................................................. 80