STC32G12K128 Development Board

I. Development Board Pin Function Diagram


II. Onboard Components

Main Control Chip: STC32G12K128-LQFP-48
Power Connection: Powered by one Type-C port or connected to a computer for program download
LED Display: One power indicator, one test indicator, and two program download indicators
Button Control: One normally closed switch (POWER) for cold start download, replacing the RESET button; one independent button with interrupt function (BOOT0)
Program Expansion: An external M24C20 EEPROM chip (designed on the back of the development board) is connected via an IIC interface Pin
Header Interface: Two rows of 20-pin 2.54mm headers are used to bring out all chip pins, compatible with the pin arrangements of other mainstream microcontroller core boards; a header interface for connecting a programmer/debugger is reserved on the back of the development board.
Reference Voltage Source: A CD431 reference voltage source is used to provide a stable 2.5V reference voltage for the microcontroller (optional; 5V is provided when not soldered).
 

III. Other Instructions

This development board does not have an onboard serial port chip; instead, it uses the built-in USB-HID function of the main control chip to connect to the computer for downloading.
The download method is as follows: Connect the computer and the development board using a Type-C cable, press and hold the BOOT0 button, then press the POWER button to power on again. When you see the green LED light up, release the BOOT0 button; you have now entered download mode.
The download attachment provides a program for flashing the onboard LED2 (blue light) for testing the development board.