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Features: 1. This core board pursues a small size with a single TYPE-C port design, and the USB function and serial port function are designed to be mutually exclusive. 2. For small volume control schemes, all IO ports are simultaneously led out on both sides of the needle arrangement, and the SWD download port is separately led out (both sides of the needle arrangement IO ports are simultaneously led out). 3. Easy to use, MINI32 can download programs through the onboard serial port. 4. High security, the chip has hardware encryption and access control functions, which can protect the security of the system. 5. Support low-power mode, the chip supports multiple low-power modes, which can achieve energy-saving application design. Parameter: TYPE-C: Choose between power input or USB/serial port (CH340) Buttons: RST (reset button), BTO (BOOT mode selection button) LED: PWR (POWER indicator light), C13 (user controlled indicator light, PC13 controls LED cathode) PCB dimensions (excluding SWD download port): 25.40 * 22.86MM (100MIL=2.54MM) PIN spacing: 2.54MM; Needle spacing on both sides: 15.24MM (600MIL) on the inner side, 20.32MM (800MIL) on the outer side Style 1: Main controller: STM32F103C8T6 Specification: STM32F103C8T6 (without CH340) STM32F103C8T6 (with CH340) Download methods: SWD/serial port, SWD C port function: serial port, USB Core: ARM Correx-M3 Main frequency: 72MHz SRAM[KB]：20 FLASH[KB]：64 C-port power input: 5V@500MA PIN POWER:5V/ 3.3V@500MA Style 2: Main controller: STM32F103C6T6A Specifications: STM32F103C6T6A (without CH340) STM32F103C6T6A (with CH340) Download methods: SWD/serial port, SWD C port function: serial port, USB Core: ARM Correx-M3 Main frequency: 72MHz SRAM[KB]：6 FLASH[KB]：32 C-port power input: 5V@500MA PIN POWER:5V/ 3.3V@500MA Style Three: Main controller: CH32V103C8T6 Specification: CH32V103C8T6 (without CH340) Download methods: SWD/serial port, SWD/USB C port function: serial port, USB Ker