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
www.simcom.com 37 / 77
Figure 18: I2C reference circuit
The I2C signal has no pull-up resistors in module. So the pulling up resistors 1KR to VDD_EXT is
necessary in application circuit.
3.8 SPI Interface
SIM7090G supports a set of 4- wire (MISO, MOSI, CS and CLK) SPI interfaces and supports both SPI
master mode and SPI slave mode. The maximum clock frequency is up to 50MHz when operating in SPI
master mode and up to 25MHz when operating in SPI Slave mode.
Table 17: Pin Definition of SPI Interface
Pin Name
Pin No.
I/O
Description
Comment
*SPI_MOSI
40
DO
SPI master-out slave-in
1.8V power domain
SPI_MISO
8
DI
SPI master-in slave-out
1.8V power domain
SPI_CS_N
63
DO
SPI chip select
1.8V power domain
SPI_CLK
9
DO
SPI clock
1.8V power domain
SPI_MOSI is FAST BOOT function before system boot-up, so the level on this pin cannot be high
before the system boot-up, otherwise the module will not start normally.
NOTE