User Guide

ME310G1 Hardware Design Guide
1VV0301588 Rev. 11 Page 5 of 91 2021-03-16
Serial Ports ............................................................................ 42
5.7.3.1. Asynchronous Serial Port (USIF0) ......................................... 42
5.7.3.2. Asynchronous Serial Port (USIF1) ......................................... 44
5.7.3.3. Auxiliary Serial Port ............................................................... 44
General purpose I/O .............................................................. 45
Using a GPIO as INPUT .......................................................... 45
Using a GPIO as OUTPUT ....................................................... 45
External SIM Holder .............................................................. 46
ADC Converter ....................................................................... 46
Using ADC Converter ............................................................. 47
DAC Converter ....................................................................... 47
Enabling DAC ......................................................................... 47
CTANK .................................................................................... 47
Forced USB boot .................................................................... 47
RF SECTION .......................................................................... 48
Antenna requirements .......................................................... 48
PCB Design guidelines .......................................................... 49
AUDIO SECTION .................................................................... 51
Electrical Characteristics ...................................................... 51
GNSS SECTION ..................................................................... 52
GNSS Signals Pin-out ............................................................ 52
RF Front End Design .............................................................. 52
Guidelines of PCB line for GNSS Antenna ............................ 52
Hardware-based solution for GNSS and LTE coexistence ... 53
GNSS Antenna Requirements ............................................... 54
GNSS Antenna specification .................................................. 54
GNSS Antenna – Installation Guidelines ............................... 54
Powering the External LNA (active antenna) ........................ 54
GNSS Characteristics ............................................................ 56