STM8S103F3P6 system board STM8S STM9 development board minimum core board Type-C interface

SKU: FA2174-1
Microcontroller

STM8S103F3P6 (8-bit, STM8 core)
Clock Speed

Up to 16 MHz
Flash Memory

8 Kbytes
RAM

1 Kbyte
EEPROM

640 bytes (true data EEPROM, 300k cycles endurance)
Operating Voltage (MCU)

2.95V – 5.5V DC
Input Voltage (Board)

4.5V – 15V DC (via power pads or Type-C)
Digital I/O Pins

Up to 16 (all broken out to headers)
ADC Channels

5 × 10-bit
Communication Interfaces

UART, SPI, I²C
Timers

Advanced 16-bit timer, 16-bit general purpose, 8-bit basic timer, watchdog timers
Programming Interface

SWIM (Single Wire Interface Module)
Board Dimensions

Approx. 28mm × 17mm – 30mm × 20mm
Operating Temperature

-40°C to +85°C

Description

The STM8S103F3P6 Minimum System Development Board is a compact, modern, and cost-effective entry point into the world of STM8S microcontroller development. Built around the robust STM8S103F3P6 8-bit MCU from STMicroelectronics, this core board provides everything you need to start prototyping embedded applications immediately.

The standout feature of this version is the Type-C USB interface for power input. Unlike older boards that use Micro-USB or the outdated Mini-USB standard, the Type-C connector is reversible, more durable, and compatible with modern smartphone chargers, power banks, and laptop ports. You can power your projects using cables you already own, without worrying about orientation.

The heart of the board is the STM8S103F3P6 microcontroller, featuring an advanced STM8 core with Harvard architecture and a 3-stage pipeline capable of running at up to 16 MHz. With 8 Kbytes of Flash program memory, 1 Kbyte of RAM, and 640 bytes of true data EEPROM, this MCU offers a balanced feature set for a wide range of applications. The true EEPROM has an endurance of 300 kcycles and data retention of 20 years at 55°C, making it suitable for storing calibration constants or user settings without external memory chips.

All microcontroller pins are broken out to standard 2.54mm headers with clear silkscreen labeling, making it easy to integrate into breadboards or custom PCBs. The board includes a SWIM (Single Wire Interface Module) connector for programming and debugging, a reset button for easy system restart, and a user LED connected to PORTB_5 for basic output testing. An onboard 3.3V voltage regulator allows the board to accept input voltages from 4.5V to 15V via the power pads or the Type-C port.

Whether you are a student learning embedded systems, a hobbyist building a DIY project, or a professional developing cost-sensitive industrial controls, this STM8S103F3P6 minimum system board with Type-C interface delivers exceptional value in a tiny 30mm × 20mm footprint.

Key Features

  • Modern Type-C USB Interface – Reversible, durable, and compatible with current smartphones, laptops, and power banks; no more struggling with cable orientation

  • STM8S103F3P6 Microcontroller – 16MHz advanced STM8 core with Harvard architecture and 3-stage pipeline

  • Memory Resources – 8 Kbytes Flash, 1 Kbyte RAM, 640 bytes true data EEPROM

  • All Pins Broken Out – All 16 GPIO pins accessible via 2.54mm headers for easy breadboard and PCB integration

  • SWIM Programming Interface – Single-wire debug and programming port for use with ST-Link programmers

  • Onboard Reset Button – Physical reset button for easy system restart during development

  • User LED – Built-in LED connected to PORTB_5 for basic output testing and debugging

  • Wide Power Input Range – 4.5V to 15V input via power pads; onboard 3.3V regulator

  • Rich Peripherals – 10-bit ADC (5 channels), UART, SPI, I²C, multiple timers

  • Compact Form Factor – Extremely small board (approx. 28–30mm × 17–20mm) for space-constrained projects

  • Clear Pin Labeling – All pins marked on the silkscreen for easy identification

Technical Specifications 

Specification Value
Microcontroller STM8S103F3P6 (8-bit, STM8 core)
Clock Speed Up to 16 MHz
Flash Memory 8 Kbytes
RAM 1 Kbyte
EEPROM 640 bytes (true data EEPROM, 300k cycles endurance)
Operating Voltage (MCU) 2.95V – 5.5V DC
Input Voltage (Board) 4.5V – 15V DC (via power pads or Type-C)
Digital I/O Pins Up to 16 (all broken out to headers)
ADC Channels 5 × 10-bit
Communication Interfaces UART, SPI, I²C
Timers Advanced 16-bit timer, 16-bit general purpose, 8-bit basic timer, watchdog timers
Programming Interface SWIM (Single Wire Interface Module)
Board Dimensions Approx. 28mm × 17mm – 30mm × 20mm
Operating Temperature -40°C to +85°C

Typical Usage

  • Embedded Systems Learning – Ideal for students and beginners learning 8-bit microcontroller programming, C coding for embedded systems, and register-level programming

  • Industrial Control – Motor control applications using the advanced 16-bit timer with complementary outputs and dead-time insertion

  • Home Automation – Smart home devices, sensor interfaces, and actuator control with I²C and SPI communication

  • Consumer Electronics – Small appliances, remote controls, and user interface controllers

  • IoT Edge Devices – Low-power sensor nodes with periodic wake-up using the auto-wake-up timer

  • LED Lighting Control – PWM generation for RGB LED control and dimming applications

  • Automotive Accessories – 12V automotive applications with 4.5V-15V input range

  • Prototype Development – Rapid proof-of-concept for products before custom PCB design

  • Data Logging – Store calibration data or user settings in the integrated EEPROM (640 bytes)

  • Communication Bridges – Interface conversion between UART, SPI, and I²C protocols

Q: Why should I choose the Type-C version over the Micro-USB version?

The Type-C connector offers several advantages: it is reversible (no more fumbling with orientation), more durable (rated for more insertion cycles), and universally compatible with modern smartphones, laptops, tablets, and power banks. Micro-USB is being phased out, and Type-C is the current and future standard. If you have modern devices, you likely already have Type-C cables available.

Q: Does this board have a USB bootloader? Can I program it via the Type-C port?

No. Unlike many ARM-based development boards (e.g., Arduino), this STM8S board does not have a USB bootloader. The Type-C port is for power only, not for programming or data transfer. You must use an external ST-Link programmer connected to the SWIM header to program the microcontroller.

Q: How do I program this board?

You need an ST-Link programmer (ST-Link V2 or compatible). Connect the programmer to the board’s SWIM interface (typically 4 pins: VCC, GND, SWIM, RESET). Use STMicroelectronics’ STVP (ST Visual Programmer) or open-source tools like SDCC with stm8flash. The SWIM interface uses a single wire for programming and debugging, making it simple to use.

Q: What is the input voltage range and how should I power the board?

The board accepts 4.5V to 15V DC input via the power pads, or 5V via the Type-C port. An onboard 3.3V regulator provides stable power to the microcontroller. Do not exceed 15V, as this may damage the voltage regulator. The 5V pin on the header reflects the input voltage, not a regulated output.

Q: What is the difference between STM8S103F3P6 and STM8S003F3P6?

The STM8S103F3P6 has 640 bytes of EEPROM (vs 128 bytes on the 003), 10,000 Flash erase cycles (vs 100 cycles on the 003), and is intended for development and prototyping. The STM8S003F3P6 is a value-line chip designed for mature, high-volume production where cost is critical. For learning and development, the 103F3P6 is the recommended choice.

Q: What development tools are available for this microcontroller?

Several options exist:

  • STVD (ST Visual Develop) – Free IDE from STMicroelectronics

  • COSMIC C compiler – Free for STM8 up to 32KB (limited edition)

  • SDCC (Small Device C Compiler) – Complete open-source option

  • IAR Embedded Workbench for STM8 – Commercial option with free size-limited version

  • STVP – Programming utility for flashing hex files

Q: What communication interfaces are available on this board?

The STM8S103F3P6 supports:

  • UART – Full-duplex serial communication (TX/RX) with LIN and IrDA support

  • SPI – Synchronous serial up to 8 Mbit/s

  • I²C – Two-wire interface up to 400 kbit/s
    All pins are broken out to the headers for easy connection to sensors, displays, and other peripherals.

Q: Can I use this board with Arduino IDE?

Not directly. The Arduino IDE does not natively support STM8 microcontrollers. However, community projects like Sduino (STM8duino) provide Arduino-style wrappers and libraries for the STM8 family, allowing you to use a simplified coding approach with SDCC compiler. This is an option for developers familiar with Arduino but requires additional setup.

Q: What is the EEPROM endurance and data retention?

The integrated 640-byte true data EEPROM has an endurance of 300 kcycles (write/erase cycles) and data retention of 20 years at 55°C. This makes it suitable for storing calibration data, configuration settings, or user preferences that may be updated frequently.

Q: Is this board suitable for commercial or industrial products?

Yes. The STM8S103F3P6 is rated for industrial temperature range (-40°C to +85°C) and is qualified for use in industrial applications. The minimum system board can be used for prototyping, and the design can be transferred to a custom PCB for mass production. Many businesses use this board for low-volume production runs (1-1000 units) due to its low cost and reliability.

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