The MCU of this system board adopts the CH55x series of Qinheng Electronics and is packaged as an SOP16 microcontroller. Specific supported models include CH551G CH552G CH554G, etc. CH55x is an 8051 core microcontroller that can be programmed using the c51 language. Because the CH55x series comes with USB function, many small projects that support HID can be developed based on this minimal system, such as BadUSB, keyboard, For specific interfaces such as the mouse, please refer to the attached datasheet. Burning method: Use the official ISP software to short-circuit the download interface and then power on. ~~~~ Routines and ISP download tools can be downloaded from the official website. The appendix usrLED control pin is P3^2. You can download the appendix file for programming testing.
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