Table Of Contents; Contents - Quectel FGM842D Hardware Design

Contents

Safety Information ...................................................................................................................................... 3
About the Document .................................................................................................................................. 4
Contents ...................................................................................................................................................... 5
Table Index .................................................................................................................................................. 7
Figure Index ................................................................................................................................................ 8
1 Introduction ............................................................................................................................................. 9
1.1. Special Mark .................................................................................................................................. 9
2 Product Overview ................................................................................................................................. 11
2.1. Key Features ................................................................................................................................ 12
3 Application Interfaces .......................................................................................................................... 13
3.1. Pin Assignment ............................................................................................................................ 13
3.2. Pin Description ............................................................................................................................. 14
3.3. GPIO Multiplexing ........................................................................................................................ 16
3.4. Application Interfaces ................................................................................................................... 17
3.4.1. UARTs ............................................................................................................................... 17
3.4.2. SPI ..................................................................................................................................... 18
3.4.3. I2C Interface ...................................................................................................................... 20
3.4.4. PWM Interfaces ................................................................................................................. 20
3.4.5. ADC Interfaces .................................................................................................................. 21
4 Operating Characteristics .................................................................................................................... 22
4.1. Power Supply ............................................................................................................................... 22
4.1.1. Reference Design for Power Supply ................................................................................. 22
4.2. Turn On ........................................................................................................................................ 23
4.3. Reset ............................................................................................................................................ 24
5 RF Performances .................................................................................................................................. 26
5.1. Wi-Fi Performances ..................................................................................................................... 26
5.2. Bluetooth Performances .............................................................................................................. 27
5.3. Antenna/Antenna Interfaces ........................................................................................................ 28
5.3.1.1. Antenna Design Requirements ............................................................................... 28
5.3.2. FGM842D RF Coaxial Connector ..................................................................................... 28
5.3.2.1. Receptacle Specifications ....................................................................................... 28
5.3.2.2. Antenna Connector Installation ............................................................................... 29
5.3.2.3. Recommended RF Connector Installation .............................................................. 30
5.3.2.4. Recommended Manufacturers of RF Connector and Cable .................................. 32
6 Electrical Characteristics & Reliability ............................................................................................... 33
6.1. Absolute Maximum Ratings ......................................................................................................... 33
FGM842D_Hardware_Design
Wi-Fi&Bluetooth Module
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