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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Figure 16: SIM interface reference circuit
SIM_DATA has been pulled up with a 20KΩ resistor to SIM_VDD in module, so it no need pulled up resistor
anymore. SIM_VDD needs a 100nF capacitor close to SIM socket.
SIM_CLK is very important signal, the rise time and fall time of SIM_CLK should be less than 40ns. So the
junction capacity of the TVS need to less 50pF.
In order to enhance the reliability and availability of the (U)SIM card in applications. Please follow the
guidelines below when designing.
It is recommended to place a 100nF capacitor on the SIM_VDD signal line close to the SIM card
holder.
Place TVS near the SIM card holder. The junction capacity of the TVS should not exceed 50pF.
The 22Ω resistor in series between the SIM card holder and the module can enhance the ESD
protection performance.
Keep SIM card signals away from RF and VBAT traces.
SIM card signal line traces to avoid branch.
To avoid cross-talk between SIM_DATA and SIM_CLK, keep them away from each other and
shield them with surrounded ground. USIM_RST should also be ground shielded.
3.6 PCM Interface
SIM7090G provides a PCM interface for external codec, which can be used in master mode with short sync
and 16 bits linear format.