STM32F103C8T6/C6T6 ARM Cortex-M3 Minimum System Development Board for Arduino Take your embedded systems projects to the next level with the STM32F103C8T6/C6T6 Minimum System Development Board. Powered by an ARM Cortex-M3 core running at 72MHz, this compact yet capable board is the go-to choice for hobbyists, students, and engineers who need a reliable, flexible microcontroller platform compatible with Arduino-style development workflows. Made in Mainland China. Key Features High-Performance Cortex-M3 Core: 72MHz operating frequency with 64KB Flash and 20KB SRAM in a compact LQFP-48 package — perfect for demanding real-time tasks and applications. Rich Connectivity Interfaces: 2× SPI, 3× USART, 2× I2C, 1× CAN, and 37× I/O ports give you everything you need to interface with sensors, modules, and peripherals in complex projects. Flexible Debugging & Programming: Supports JTAG/SWD debug interface for easy debugging and IAP (In-Application Programming), plus a Micro USB interface for power and USB communication, and USART1 for program download. Stable Power Management: RT9193 3.3V voltage regulator delivers up to 300mA stable output. Dual power interfaces (5V and 3.3V) plus a power LED (PWR) and user LED (PC13) for clear status indication. Customizable Pin Headers: Ships with un-soldered pin headers so you can choose your preferred soldering direction — ideal for breadboards, custom PCBs, or enclosures. Dual Crystal Oscillators: 8MHz main crystal for 72MHz system clock, plus a 32.768KHz crystal for built-in RTC or calibration use. Technical Specifications Chip STM32F103C8T6 / C6T6 Package Type LQFP-48 Core ARM Cortex-M3 Operating Frequency 72MHz Flash / SRAM 64KB Flash / 20KB SRAM I/O Ports 37× GPIO Serial Interfaces 2× SPI, 3× USART, 2× I2C, 1× CAN ADC 2× 12-bit / 16-channel ADC Timers 3× General Purpose + 1× Advanced Debug Interface JTAG / SWD + IAP Support Voltage Regulator RT9193 3.3V, up to 300mA Power Input 5V or 3.3V Board Size 54 × 23 × 12 mm (2.11 × 0.9 × 0.47 in) Condition New Interface Overview SWD Interface: Supports simulation, download, and full debugging. Micro USB Interface: Power supply and USB communication (note: program download not supported via USB). USART1 Interface: Download programs or use for serial communication. MCU Pin Interface: All I/O port pins broken out for easy peripheral connections. 5V / 3.3V Power Interfaces: For external power supply or shared ground with other modules. What's in the Box 1× STM32F103C8T6/C6T6 Minimum System Development Board Related Products You May Like 10-Pack 22AWG Glass Tube Fuse Holder 5x20mm & 6x30mm Screw 140W USB-C Fast Charger with Auto Power-Off Overcharge Protection 140W Auto-Eject USB-C Cable – Anti-Overcharge Battery Guard For further reading on microcontroller standards and embedded systems, visit the NIST Electronics & Electrical Engineering resources. Frequently Asked Questions Q: What is the STM32F103C8T6 development board used for? A: The STM32F103C8T6 minimum system development board is used for learning embedded systems, prototyping microcontroller projects, and building Arduino-compatible applications. Its ARM Cortex-M3 core and rich peripheral set (SPI, I2C, USART, CAN, GPIO) make it suitable for robotics, IoT devices, sensor interfacing, motor control, and more. Q: Is this board compatible with Arduino IDE? A: Yes, with the appropriate STM32 board support package installed in the Arduino IDE, the STM32F103C8T6 board can be programmed using the Arduino environment. You can also use STM32CubeIDE, Keil, or other ARM-compatible development tools. Q: How do I upload code to the STM32F103C8T6 board? A: You can upload code via three methods: (1) using the SWD interface with an ST-Link programmer for full debug support, (2) via USART1 using a USB-to-TTL adapter and the boot0 jumper set to boot from system memory, or (3) via JTAG. Note that the Micro USB port on this board is for power and USB communication only — it does not support direct program download. Q: What voltage does this development board operate at? A: The board accepts both 5V and 3.3V power inputs. The onboard RT9193 voltage regulator converts 5V input to a stable 3.3V output (up to 300mA) for the STM32 chip. GPIO pins operate at 3.3V logic levels, though most are 5V-tolerant. {"@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{"@type": "Question", "name": "What is the STM32F103C8T6 development board used for?", "acceptedAnswer": {"@type": "Answer", "text": "The STM32F103C8T6 minimum system development board is used for learning embedded systems, prototyping microcontroller projects, and building Arduino-compatible applications. Its ARM Cortex-M3 core and rich peripheral set (SPI, I2C, USART, CAN, GPIO) make it suitable for robotics, IoT devices, sensor interfacing, motor control, and more."}}, {"@type": "Question", "name": "Is this board compatible with Arduino IDE?", "acceptedAnswer": {"@type": "Answer", "text": "Yes, with the appropriate STM32 board support package installed in the Arduino IDE, the STM32F103C8T6 board can be programmed using the Arduino environment. 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