Quectel EG915U-EU - Table of Contents

LTE Standard Module Series
EG915U-EU_Hardware_Design 5 / 81
Contents
Safety Information ....................................................................................................................................... 3
About the Document ................................................................................................................................... 4
Table Index ................................................................................................................................................... 7
Figure Index ................................................................................................................................................. 8
1 Introduction ........................................................................................................................................ 10
1.1. Special Mark ............................................................................................................................ 10
2 Product Overview .............................................................................................................................. 11
2.1. Frequency Bands and Functions ............................................................................................ 12
2.2. Key Features ........................................................................................................................... 13
2.3. Functional Diagram ................................................................................................................. 15
2.4. Pin Assignment ........................................................................................................................ 15
2.5. Pin Description ........................................................................................................................ 17
2.6. EVB ......................................................................................................................................... 25
3 Operating Characteristics ................................................................................................................. 26
3.1. Operating Modes ..................................................................................................................... 26
3.2. Sleep Mode ............................................................................................................................. 27
3.2.1. UART Application Scenario ............................................................................................ 27
3.2.2. USB Application Scenario .............................................................................................. 27
3.2.2.1. USB Application with USB Remote Wakeup Function* ................................. 28
3.2.2.2. USB Application with USB Suspend/Resume and RI Function ..................... 29
3.3. Airplane Mode ......................................................................................................................... 29
3.4. Power Supply .......................................................................................................................... 30
3.4.1. Power Supply Pins ......................................................................................................... 30
3.4.2. Reference Design for Power Supply .............................................................................. 31
3.4.3. Requirements for Voltage Stability ................................................................................. 31
3.5. Turn On ................................................................................................................................... 33
3.5.1. Turn on the Module with PWRKEY ................................................................................ 33
3.6. Turn Off .................................................................................................................................... 34
3.6.1. Turn off the Module with PWRKEY ................................................................................ 35
3.6.2. Turn off the Module with AT Command .......................................................................... 35
3.7. Reset ....................................................................................................................................... 36
4 Application Interfaces ....................................................................................................................... 38
4.1. Analog Audio Interfaces .......................................................................................................... 38
4.1.1. Audio Interfaces Design ................................................................................................. 38
4.1.2. Microphone Interface Design ......................................................................................... 39
4.1.3. Receiver Interface Design .............................................................................................. 40
4.2. USB Interface .......................................................................................................................... 40
4.3. USB_BOOT Interface .............................................................................................................. 42
4.4. (U)SIM Interface ...................................................................................................................... 43
4.5. I2C and PCM Interfaces .......................................................................................................... 45