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

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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.

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