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
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3.11 LDO output
SIM7090G has a LDO power output named VDD_EXT. The output voltage is 1.8V. This voltage can only be
pulled up for the external GPIO or power supply for the level conversion circuit.
Figure 22：Power on sequence of the VDD_EXT
Table 21: Electronic characteristic
Symbol
Description
Min.
Typ.
Max.
Unit
V
VDD_EXT
Output voltage
1.75
1.8
1.85
V
I
O
Output current
-
-
50
mA
The VDD_EXT is used to the IO power in the module. The Output voltage is not supported to adjust.
3.12USB_BOOT Interface
SIM7090G provides a USB_BOOT pin for firmware upgrade during development or factory production.
Before the module powers up, pull USB_BOOT up to high level will force the module to boot from USB port.
Table 22: Pin Definition of USB_BOOT Interfaces
Pin Name
Pin No.
I/O
Description
Comment
USB_BOOT
87
DI
Force the module to enter into
emergency download mode.
1.8V power domain.
Active high.
If unused, keep it open.
NOTE