Description The STM8S003F3/K3 value line 8-bit microcontrollers offer 8 Kbytes of Flash program memory, plus integrated true data EEPROM. They are referred to as low-density devices in the STM8S microcontroller family reference manual (RM0016). The STM8S003F3/K3 value line devices provide the following benefits: performance, robustness and reduced system cost. Device performance and robustness are ensured by true data EEPROM supporting up to 100000 write/erase cycles, advanced core and peripherals made in a state-of-the-art technology at 16 MHz clock frequency, robust I/Os, independent watchdogs with separate clock source, and a clock security system. The system cost is reduced thanks to a high system integration level with internal clock oscillators, watchdog, and brown-out reset. Full documentation is offered as well as a wide choice of development tools. All features Core 16 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline Extended instruction set Memories Program memory: 8 Kbyte Flash memory; data retention 20 years at 55 °C after 100 cycles RAM: 1 Kbyte Data memory: 128 bytes true data EEPROM; endurance up to 100 k write/erase cycles Communications interfaces UART with clock output for synchronous operation, SmartCard, IrDA, LIN master mode SPI interface up to 8 Mbit/s I2C interface up to 400 Kbit/s Analog to digital converter (ADC) 10-bit ADC, ± 1 LSB ADC with up to 5 multiplexed channels, scan mode and analog watchdog I/Os Up to 28 I/Os on a 32-pin package including 21 high-sink outputs Highly robust I/O design, immune against current injection Development support Embedded single-wire interface module (SWIM) for fast on-chip programming and non-intrusive debugging