User's Manual
Table Of Contents
- Contents
- Table Index
- Figure Index
- 1Introduction
- 1.1Product Outline
- 1.2Hardware Interface Overview
- 1.3Hardware Block Diagram
- 1.4Functional Overview
- 2Package Information
- 2.1.Pin Assignment Overview
- 2.2.Pin Description
- 2.3.Mechanical Information
- 2.4.Footprint Recommendation
- 3Interface Application
- 3.1Power Supply
- 3.3UART Interface
- 3.4USB Interface
- 3.5SIM Interface
- 3.6PCM Interface
- 3.7I2C Interface
- 3.8SPI Interface
- 3.9Network status
- 3.10ADC interface
- 3.11LDO output
- 3.12USB_BOOT Interface
- 3.13GPIO Interface
- 3.14 RF control Interface
- 3.15Force USB Download Interface
- 4RF Specifications
- 4.1LTE RF Specifications
- 4.2LTE Antenna Design Guide
- 4.3GNSS
- 4.4RF traces note
- 5 Electrical Specifications
- 5.1Absolute maximum ratings
- 5.2Operating conditions
- 5.3Operating Mode
- 5.4Current Consumption
- 5.5ESD Notes
- 6 SMT Production Guide
- 6.1Top and Bottom View of SIM7090G
- 6.2Label Information
- 6.3Typical SMT Reflow Profile
- 6.5Baking
- 6.6Stencil Foil Design Recommendation
- 7 Packaging
- 7.1Tray packaging
- 8 Appendix
- 8.1Coding Schemes and Maximum Net Data Rates over Air
- 8.2Related Documents
- 8.3Terms and Abbreviations
- 8.4Safety Caution
SIM7090G User Manual V1.01
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Under-voltage warning function and under-voltage power-off function are disabled by default. For more
information about these AT commands, please refer to Document [1].
3.2 Power on/Power off/Reset Function
3.2.1 Turn on Module Using the PWRKEY Pin
SIM7090G can be powered on by briefly pulling the PWRKEY pin to ground.
The PWRKEY pin has been pulled up with a diode to 1.8V internally, so it does not need to be pulled up
externally. It is strongly recommended to put an ESD protection diode close to the PWRKEY pin, as it would
strongly enhance the ESD performance of PWRKEY pin.
The PWRKEY pin has its own reset function. The reset time is determined by the internal timer (default is 15
seconds). After the PWRKEY is pulled low, the module will be reset after 15 seconds. Therefore, it is not
recommended to connect PWRKEY to GND all the time in external circuit design.
Please refer to the following figure for the recommended reference circuit.
Figure 6: Reference power on/off circuit
The power-on scenarios are illustrated in the following figure.
NOTE