Product Info

LTE Standard Module Series
EG91 Series Hardware Design
EG91_Series_Hardware_Design
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Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 5
Table Index ................................................................................................................................................... 7
Figure Index ................................................................................................................................................. 9
1 Introduction ........................................................................................................................................ 11
1.1. Safety Information .................................................................................................................... 12
2 Product Concept ................................................................................................................................ 13
2.1. General Description ................................................................................................................. 13
2.2. Key Features............................................................................................................................ 14
2.3. Functional Diagram .................................................................................................................. 17
2.4. Evaluation Board ...................................................................................................................... 18
3 Application Interfaces ........................................................................................................................ 19
3.1. General Description ................................................................................................................. 19
3.2. Pin Assignment ........................................................................................................................ 20
3.3. Pin Description ......................................................................................................................... 21
3.4. Operating Modes ..................................................................................................................... 28
3.5. Power Saving ........................................................................................................................... 29
3.5.1. Sleep Mode .................................................................................................................... 29
3.5.1.1. UART Application ................................................................................................. 29
3.5.1.2. USB Application with USB Remote Wakeup Function ......................................... 30
3.5.1.3. USB Application with USB Suspend/Resume and RI Function............................ 30
3.5.1.4. USB Application without USB Suspend Function ................................................. 31
3.5.2. Airplane Mode ................................................................................................................ 32
3.6. Power Supply ........................................................................................................................... 32
3.6.1. Power Supply Pins ......................................................................................................... 32
3.6.2. Decrease Voltage Drop .................................................................................................. 33
3.6.3. Reference Design for Power Supply .............................................................................. 34
3.6.4. Monitor the Power Supply .............................................................................................. 34
3.7. Power-on/off Scenarios............................................................................................................ 35
3.7.1. Turn on Module Using the PWRKEY ............................................................................. 35
3.7.2. Turn off Module .............................................................................................................. 37
3.7.2.1. Turn off Module Using the PWRKEY Pin ............................................................. 37
3.7.2.2. Turn off Module Using AT Command ................................................................... 37
3.8. Reset the Module ..................................................................................................................... 38
3.9. (U)SIM Interfaces ..................................................................................................................... 39
3.10. USB Interface ........................................................................................................................... 42
3.11. UART Interfaces ...................................................................................................................... 43
3.12. PCM and I2C Interfaces........................................................................................................... 46
3.13. SPI Interface ............................................................................................................................ 49
3.14. Network Status Indication ........................................................................................................ 50