STM8

1 STM8S105K6

• 16 MHz advanced STM8 core
• 32 Kbyte Flash
• 1 Kbyte EEPROM
• 2 Kbyte RAM

• 10-bit, ±1 LSB ADC with up to 10 multiplexed channels ADC
• UART with clock output for SmartCard, IrDA, LIN master mode
• SPI interface up to 8 Mbit/s
• I2C interface up to 400 kbit/s
• Up to 38 I/Os on a 48-pin package

• 96-bit unique key for each device
• 2.95 to 5.5 V operating voltage

STM8S105K6 Datasheet

2 STM8S208

• https://www.st.com/content/st_com/en/products/microcontrollers/stm8-8-bit-mcus/stm8s-series/stm8s207-208/stm8s208mb.html

3 Toolchain

3.1 STM8Tools

• https://github.com/tenbaht/sduino/releases/download/v0.3.3/sduino-tools_linux32-2017.11.13.tar.bz2
• https://github.com/tenbaht/sduino/releases/download/v0.3.3/sduino-tools_linux64-2017.11.13.tar.bz2
• https://github.com/tenbaht/sduino/releases/download/v0.3.3/sduino-tools_macosx-2017.11.13.tar.bz2
• https://github.com/tenbaht/sduino/releases/download/v0.3.3/sduino-tools_mingw32-2017.11.13.tar.bz2

3.2 SDCC

• https://github.com/tenbaht/sduino/releases/download/v0.3.0/sdcc-stm8-amd64-unknown-linux2.5-20171020-10088.tar.bz2
• https://github.com/tenbaht/sduino/releases/download/v0.3.0/sdcc-stm8-i386-unknown-linux2.5-20171020-10088.tar.bz2
• https://github.com/tenbaht/sduino/releases/download/v0.3.0/sdcc-stm8-i586-mingw32msvc-20171020-10088.tar.bz2
• https://github.com/tenbaht/sduino/releases/download/v0.3.3/sdcc-stm8-universal-apple-macosx-20170720-9960.tar.bz2

3.3 i686-mingw32

• https://github.com/stm32duino/BoardManagerFiles/raw/master/STM8/tools/STM8Tools-0.1.0-windows.tar.bz2
• http://cosmicsoftware.com/Arduino/4.1.3/Cxppstm8.zip

3.4 Github

• https://github.com/tenbaht/sduino
• https://github.com/tenbaht/sduino/raw/master/package_sduino_stm8_index.json
• https://github.com/stm32duino/Arduino_Core_STM8
• https://github.com/stm32duino/BoardManagerFiles/raw/master/STM8/package_stm8_index.json

4 Upload

The STM8 SWIM protocol (STLink) is well documented in UM0470

4.1 Hardware

• https://github.com/rumpeltux/esp-stlink
• https://tenbaht.github.io/sduino/hardware/flashtool/

4.2 Connections

• The RST is connected to ESP8266 GPIO5 (D1 on NodeMCU).
• The SWIM is connected to ESP8266 GPIO4 (D2 on NodeMCU) via a 1kΩ pull-up resistor
• 3.3V --- VCC_3.3V
• GND --- GND

4.3 Software

• https://github.com/rumpeltux/stm8flash

6 Reference

• https://www.st.com/en/evaluation-tools/nucleo-8s208rb.html