User's Guide

WL865E4-P Module Hardware User Guide
1VV0301580 Rev. 4 Page 6 of 56 2019-08-08
Communication ports .................................................................. 24
5.5.1. High Speed UART ...................................................................... 24
5.5.2. Low Speed UART ....................................................................... 24
5.5.3. SDIO ........................................................................................... 25
5.5.4. SPI.............................................................................................. 25
5.5.5. I2C .............................................................................................. 25
5.5.6. USB ............................................................................................ 25
General purpose I/O ................................................................... 25
ADC Converter ........................................................................... 27
General Digital Interface Recommendations ............................... 27
6. RF SECTION .............................................................................. 29
Bands Variants ........................................................................... 29
6.1.1. WIFI ............................................................................................ 29
6.1.2. BlueTooth ................................................................................... 29
TX Output power ......................................................................... 30
6.2.1. WIFI ............................................................................................ 30
6.2.1.1. 2.4GHz ....................................................................................... 30
6.2.1.2. 5GHz .......................................................................................... 31
6.2.2. BlueTooth ................................................................................... 31
RX Sensitivity ............................................................................. 32
6.3.1. WIFI ............................................................................................ 32
6.3.1.1. 2.4GHz ....................................................................................... 32
6.3.1.2. 5GHz .......................................................................................... 33
6.3.2. BlueTooth ................................................................................... 33
WIFI Antenna requirements ........................................................ 34
BlueTooth Antenna requirements ............................................... 34
PCB Antenna Design Guidelines ................................................ 34
PCB Design Guidelines .............................................................. 34
6.7.1. PCB General Guidelines ............................................................. 34
6.7.2. RF PCB Guidelines ..................................................................... 36
7. AUDIO SECTION ....................................................................... 39
Electrical Characteristics ............................................................. 39
8. MECHANICAL DESIGN ............................................................. 40
Drawing ...................................................................................... 40
9. APPLICATION PCB DESIGN .................................................... 42