STM8S103F3P6 Minimum System Development Board
= STM8 8-Bit Microcontroller Core Board with Micro USB =
This minimum system board is built around the STM8S103F3P6, an 8bit microcontroller from STMicroelectronics. It provides a costeffective platform for embedded development with Micro USB power and SWIM debugging support.
8KB Flash & 640B EEPROM - Superior to STM8S003F3 variants
Micro USB Power - Uses common smartphone cables
Input voltage range is 4.5V to 15V via 2.54mm pins
Use SWIM interface for programming with ST-Link
5V pin voltage equals module input voltage - not regulated output
= Technical Specifications =
| Parameter | Value |
|---|
| Core | STM8 8-bit |
| Clock Speed | 16MHz internal |
| Flash Memory | 8KB |
| SRAM | 1KB |
| EEPROM | 640 bytes |
| GPIO Pins | Up to 16 |
| ADC | 10-bit with 5 channels |
| Communication | UART, I2C, SPI |
| Programming Interface | SWIM (Single Wire) |
= Key Features =
Micro USB Power - Compatible with smartphone cables
SWIM Debugging Singlewire programming interface
All Pins Exposed - Labeled 2.54mm headers
Onboard LEDs Power and userprogrammable demo LED
Reset Button - Hardware reset capability
== Applications ==
- Embedded system learning and prototyping
- Industrial control and automation
- Consumer electronics projects
- Sensor data acquisition
- Low-cost product development
Superior to STM8S003F3 - More EEPROM and 100x flash endurance
LowCost Entry Affordable 8-bit development platform
√ 30x20mm compact size
√ Supports STVD and IAR development environments
√ Complete pin labeling for easy wiring
= Connection Guide =
Power options:
- Micro USB: Standard 5V phone charger
- 2.54mm pins: 4.5V to 15V input
- 3.3V pin: Can output 3.3V to external devices
Programming:
- SWIM: Single-wire debug interface
- Use ST-Link programmer
Use Micro USB for convenient power from phone chargers
5V pin reflects input voltage - not regulated output
Do not exceed 15V input voltage
Input voltage range applies to 2.54mm pin power only
= Development Environment =
The board supports STVD (ST Visual Develop) and IAR Embedded Workbench. Programming requires an STLink or compatible USBto-SWIM adapter. STM8 library examples are available for timers, UART, ADC, and clock switching.
STM8S103F3 offers 10000 flash erase cycles vs 100 on STM8S003F3
Use STVP programming software for firmware upload
SWIM interface is singlewire no complex JTAG needed
= Troubleshooting =
Board not powering:
- Check Micro USB cable and charger
- Verify input voltage 4.5V-15V if using pin power
- Avoid using USB MINI cables (not supported)
Programming fails:
- Connect SWIM correctly (SWIM, GND, RESET)
- Ensure ST-Link drivers installed
- Check target voltage matches programmer setting
