Table Of Contents; Contents - Quectel EG91 Series Hardware Design

Contents

Safety Information...................................................................................................................................................... 3
About the Document..................................................................................................................................................5
Contents........................................................................................................................................................................9
Table Index.................................................................................................................................................................11
Figure Index............................................................................................................................................................... 13
1 Introduction....................................................................................................................................................... 15
2 Product Concept...............................................................................................................................................17
2.1. General Description..............................................................................................................................17
2.2. Key Features......................................................................................................................................... 18
2.3. Functional
2.4. Evaluation
3 Application Interfaces.....................................................................................................................................23
3.1. General Description..............................................................................................................................23
3.2. Pin Assignment..................................................................................................................................... 24
3.3. Pin Description...................................................................................................................................... 25
3.4. Operating
3.5. Power Saving........................................................................................................................................ 32
3.5.1. Sleep
3.5.2. Airplane
3.6. Power Supply........................................................................................................................................ 36
3.6.1. Power Supply
3.6.2. Decrease Voltage
3.6.3. Reference Design for Power
3.6.4. Monitor the Power
3.7. Power-on/off
3.7.1. Turn on Module Using the
3.7.2. Turn off
3.8. Reset the
3.9. (U)SIM Interfaces..................................................................................................................................43
3.10. USB Interface........................................................................................................................................ 46
3.11. UART Interfaces................................................................................................................................... 47
3.12. PCM and I2C
3.13. SPI Interface.......................................................................................................................................... 52
3.14. Network Status
3.15. STATUS................................................................................................................................................. 54
3.16. ADC Interface........................................................................................................................................ 54
3.17. Behaviors of
3.18. USB_BOOT
4 GNSS Receiver..................................................................................................................................................58
EG91_Series_Hardware_Design
Diagram.............................................................................................................................. 21
Board...................................................................................................................................22
Modes.................................................................................................................................. 32
Mode................................................................................................................................. 32
Mode.............................................................................................................................35
Pins.....................................................................................................................36
Drop............................................................................................................. 36
Supply.........................................................................................................38
Scenarios....................................................................................................................... 38
PWRKEY......................................................................................38
Module...........................................................................................................................40
Module..................................................................................................................................42
Interfaces...................................................................................................................... 49
Indication....................................................................................................................53
RI......................................................................................................................................55
Interface.......................................................................................................................... 56
Supply.......................................................................................38
LTE Standard Module Series
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