Specifications
Table Of Contents
- 1Introduction
- 1.1Product Outline
- 1.2Hardware Interface Overview
- 1.3Hardware Block Diagram
- 1.4Functional Overview
- 2Package Information
- 2.1Pin Assignment Overview
- 2.2Pin Description
- 2.3Mechanical Information
- 2.4Footprint Recommendation
- 3Interface Application
- 3.1Power Supply
- 3.3WAKEUP Description
- 3.5UART Interface
- 3.6RI signal behaviors
- 3.7ADC
- 3.8SIM Card Interface
- 3.9Network Status
- 4Operation Mode
- 4.1Operating mode
- 4.2PSM
- 4.3PSM wake up
- 5RF Specifications
- 5.1LTE RF Specifications
- 5.2LTE Antenna Design Guide
- 5.3RF Layout Design Guide
- 6Electrical Specifications
- 6.1Normal Operating Conditions
- 6.2Current Consumption
- 6.3ESD Notes
- 7SMT Production Guide
- 7.1Top and Bottom View of SIM7028
- 7.2Typical SMT Reflow Profile
- 7.4Baking
- 8Packaging
- 8.1Tray packaging
- 9Appendix
SIM7028 Hardware Design V1.00
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SIM7028 download baud rate defaults to 115200bps. Download steps: first trigger the module to enter the
download mode: to ensure that the module is successfully powered on, first pull down BOOT, then pull
down RESET to reset the module. After the module is successfully reset, release RESET first, and then
release it. BOOT, so the module will enter the download mode and wait for the data transmitted by the
download tool. After the module enters the download mode, set the port, baud rate and software version on
the download tool, and click the "Download" button to start downloading data.
3.5.3 Debug serial port UART0
UART0 is the debug serial port. Customers can view the underlying log information through the debug serial
port for software debugging.
Need to use a special EPAT log tool.
The baud rate that needs to be set when capturing EPAT log cannot be less than 3Mbps, otherwise the log
will be lost.
The default baud rate of DBG_UART is 3 Mbps.
When using EPAT log tool to capture log, you need to select a serial cable with a baud rate greater than
3Mbps.
3.5.4 Serial Port Voltage Level Matching
1.8V as default voltage for the serial port of the module. Costumer can also configure the voltage of the
serial port to 3.3V upon the requirements, to match the IO level of MCU.
When serial port of the module and serial port of MCU have the same voltage level, the serial port and
GPIO of module can connect to the MCU directly, the voltage level translator circuit is not needed, as
shown below:
NOTE