Product Info
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Concept
- 3 Application Interfaces
- 3.1. General Description
- 3.2. Pin Assignment
- 3.3. Pin Description
- 3.4. Operating Modes
- 3.5. Power Saving
- 3.6. Power Supply
- 3.7. Power-on/off Scenarios
- 3.8. Reset the Module
- 3.9. (U)SIM Interfaces
- 3.10. USB Interface
- 3.11. UART Interfaces
- 3.12. PCM and I2C Interfaces
- 3.13. SPI Interface
- 3.14. Network Status Indication
- 3.15. STATUS
- 3.16. ADC Interface
- 3.17. Behaviors of RI
- 3.18. USB_BOOT Interface
- 4 GNSS Receiver
- 5 Antenna Interfaces
- 6 Electrical, Reliability and Radio Characteristics
- 7 Mechanical Dimensions
- 8 Storage, Manufacturing and Packaging
- 9 Appendix A References
- 10 Appendix B GPRS Coding Schemes
- 11 Appendix C GPRS Multi-slot Classes
- 12 Appendix D EDGE Modulation and Coding Schemes
LTE Standard Module Series
EG91 Hardware Design
EG91_Hardware_Design 49 / 93
Table 18: Pin Definition of STATUS
Pin Name Pin No. I/O Description Comment
STATUS 20 DO Indicate the module’s operating status
1.8V power domain.
If unused, keep it open.
The following figure shows the reference circuit of STATUS.
4
.
7
K
47K
VBAT
2.2K
Module
STATUS
Figure 27: Reference Circuit of STATUS
3.16. ADC Interface
The module provides one analog-to-digital converter (ADC) interface. AT+QADC=0 command can be used
to read the voltage value on ADC0 pin. For more details about the command, please refer to document
[2].
In order to improve the accuracy of ADC voltage values, the traces of ADC should be surrounded by
ground.
Table 19: Pin Definition of ADC Interface
Pin Name Pin No. I/O Description Comment
ADC0 24 AI
Force the module to enter into
emergency download mode
If unused, keep this pin
open.
The following table describes the characteristics of ADC interface.