
NE866B1_Hardware_Design_Guide
1VV0301354 Rev. 6
Page
6
of
70
2018-02-28
4.3.1.1.
+5V Source Power Supply Design Guidelines ............................ 23
4.3.1.2.
+12V Source Power Supply Design Guidelines .......................... 24
4.3.1.3.
Battery Source Power Supply Design Guidelines ........................ 25
4.3.2.
Thermal Design Guidelines ......................................................... 26
4.3.3.
Power Supply PCB layout Guidelines ......................................... 27
VAUX/PWRMON Power Output .................................................. 28
3GPP Power Saving Mode (PSM) .............................................. 29
4.5.1.
LP_WAKE design guide .............................................................. 30
5.
DIGITAL SECTION .................................................................... 31
Logic Levels ................................................................................ 31
Power On.................................................................................... 32
Unconditional Restart.................................................................. 34
Power OFF procedure ................................................................ 37
Communication ports .................................................................. 38
5.5.1.
Serial Ports ................................................................................. 38
5.5.1.1.
MODEM SERIAL PORT 1 .......................................................... 38
5.5.1.2.
MODEM SERIAL PORT 2 .......................................................... 40
5.5.1.3.
RS232 LEVEL TRANSLATION ................................................... 40
General purpose I/O ................................................................... 42
5.6.1.
Using a GPIO as an INPUT ........................................................ 43
5.6.2.
Using a GPIO as an OUTPUT .................................................... 43
I2C Port ...................................................................................... 44
SIM Interface .............................................................................. 44
5.8.1.
SIMIN Detection .......................................................................... 44
ADC Converter ........................................................................... 44
6.
RF SECTION .............................................................................. 45
Bands Variants ........................................................................... 45
TX Output power ......................................................................... 45
RX Sensitivity ............................................................................. 45
RED requirements ...................................................................... 45
Antenna requirements................................................................. 46
6.5.1.
Main Antenna ............................................................................. 46
6.5.2.
PCB design guidelines ................................................................ 47
6.5.3.
Antenna installation Guidelines ................................................... 48
7.
MECHANICAL DESIGN ............................................................. 49
Mechanical Dimensions .............................................................. 49