User's Manual
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Concept
- 3 Application Interface
- 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. Turn on and off Scenarios
- 3.8. Reset the Module
- 3.9. RTC Interface
- 3.10. UART Interface
- 3.11. USIM Card Interface
- 3.12. USB Interface
- 3.13. PCM and I2C Interface
- 3.14. Network Status Indication
- 3.15. Operating Status Indication
- 4 Antenna Interface
- 5 Electrical, Reliability and Radio Characteristics
- 6 Mechanical Dimensions
- 7 Storage and Manufacturing
- 8 Appendix A Reference
- 9 Appendix B GPRS Coding Scheme
- 10 Appendix C GPRS Multi-slot Class
- 11 Appendix D EDGE Modulation and Coding Scheme
UMTS/HSPA Module Series
UG96 Hardware Design
UG96_Hardware_Design Confidential / Released 35 / 75
3.7.2.3. Automatic Shutdown
The module will constantly monitor the voltage applied on the VBAT, if the voltage ≤ 3.5V, the following
URC will be presented:
+QIND: “vbatt”,-1
If the voltage ≥ 4.21V, the following URC will be presented:
+QIND: “vbatt”,1
The uncritical voltage is 3.3V to 4.3V, If the voltage > 4.3V or < 3.3V the module would automatically shut
down itself.
If the voltage < 3.3V, the following URC will be presented:
+QIND: “vbatt”,-2
If the voltage > 4.3V, the following URC will be presented:
+QIND: “vbatt”,2
The value of voltage threshold can be revised by AT command, refer to document [1] for details.
3.8. Reset the Module
The RESET_N can be used to reset the module.
Table 9: RESET_N Pin Description
Pin Name
Pin No.
Description
DC Characteristics
Comment
RESET_N
17
Reset the module.
V
IH
max=2.1V
V
IH
min=1.3V
V
IL
max=0.5V
Pull-up to VRTC
internally with 200kΩ
resistor.
Active low.
The module can be reset by driving the RESET_N to a low level voltage for more than 100ms and then
releasing.
NOTE