The CH32V103 is A General-Purpose Microcontroller with A 32-Bit Risc-V Instruction Set Core, Featuring Fast Interrupt Response and Low Power Consumption Design Features. It Integrates Rich Peripheral Resources, Including Usb2.0 Host/Device Controller, Multi-Channel Touch Key Detection (Touchkey), Dma Controller, 12-Bit Adc, , 7-Group , Multi-Group I2c/Uart/Spi and Other Commonly Used Communication Interfaces. 4. It Can Meet the Requirements of Motor Control, Sensor Acquisition, and Healthcare Industries. Can Meet the Motor Control, Sensor Acquisition, Health Care, Consumer Electronics and Other Markets in A Variety of Applications. Portable Use, Carry with You. To query the chip read protection status; to set the chip read protection, power on again for the configuration to take effect; to release the chip read protection, power on again for the configuration to take effect; Description: Interface introduction: 1. Button S2: reset button 2. Debugging interface: used for downloading, simulation debugging 3. Startup configuration mode: Select the startup mode when the chip is powered on by configuring BOOTO/1 4. USB-A port: USB communication interface of the main chip, with Host and Device functions 5.TYPE-C port: USB communication interface of the main chip, with Host and Device functions 6.Power indicator light 7. LED1, LED2 cathode pins: can be connected to the chip IO port through wire for control. development environment IDE use-MounRiver Download MounRiver_Studio, double-click to install, and you can use it after installation. For development routines and IDE usage instructions, please refer to the official documentation of Qinheng Microelectronics. Download instructions WCH-LINK download Using this method requires a WCH-Link downloader, which can be downloaded and debugged online and is easy to use. to use WCH-LINK, you first need to install MounRiver IDE, and then install the USB driver. the driver path is MounRiver/MounRiver_Studio/LinkDrv/Link. size: 48mm x 58mm Material: PCB colour: Navy blue Package Contents: 1 x CH32V103R_MINI Development Board 1 x 14 Double Rows of Pin 1 x 15 Double Rows of Pin 1 x 5 Double Rows of Pin 1 x Jumper Cap Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.