Quectel EG12 Series, Hardware Design, Page: 4 / 98

LTE-A Module Series
EG12 Hardware Design
EG12_Hardware_Design 3 / 97
Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 3
Table Index ................................................................................................................................................... 6
Figure Index ................................................................................................................................................. 8
1 Introduction ........................................................................................................................................ 10
1.1. Safety Information.................................................................................................................... 11
2 Product Concept ................................................................................................................................ 12
2.1. General Description ................................................................................................................. 12
2.2. Key Features ........................................................................................................................... 14
2.3. Functional Diagram ................................................................................................................. 16
2.4. Evaluation Board ..................................................................................................................... 17
3 Application Interfaces ....................................................................................................................... 18
3.1. General Description ................................................................................................................. 18
3.2. Pin Assignment ........................................................................................................................ 18
3.3. Pin Description ......................................................................................................................... 20
3.4. Operating Modes ..................................................................................................................... 31
3.5. Power Saving ........................................................................................................................... 32
3.5.1. Sleep Mode .................................................................................................................... 32
3.5.1.1. UART Application ................................................................................................. 32
3.5.1.2. USB Application with USB Remote Wakeup Function ........................................ 33
3.5.1.3. USB Application with USB Suspend/Resume and RI Function .......................... 34
3.5.1.4. USB Application without USB Suspend Function ................................................ 34
3.5.2. Airplane Mode ................................................................................................................ 35
3.6. Power Supply ........................................................................................................................... 36
3.6.1. Power Supply Pins ......................................................................................................... 36
3.6.2. Decrease Voltage Drop .................................................................................................. 37
3.6.3. Reference Design for Power Supply .............................................................................. 38
3.6.4. Monitor the Power Supply .............................................................................................. 38
3.7. Turn on and off Scenarios ....................................................................................................... 38
3.7.1. Turn on the Module Using PWRKEY ............................................................................. 38
3.7.2. Turn off the Module ........................................................................................................ 40
3.7.2.1. Turn off the Module Using PWRKEY ................................................................... 40
3.7.2.2. Turn off the Module Using AT Command ............................................................ 41
3.8. Reset the Module..................................................................................................................... 41
3.9. (U)SIM Interfaces..................................................................................................................... 43
3.10. USB Interface .......................................................................................................................... 45
3.11. UART Interfaces ...................................................................................................................... 47
3.11.1. Main UART Interface ...................................................................................................... 48
3.11.2. Debug UART Interface ................................................................................................... 48
3.11.3. BT UART Interface ......................................................................................................... 48