4-Bit/8-Bit MCU

The STM8S103F2/x3 access line 8-bit microcontrollers offer 8 Kbytes Flash program memory, plus integrated true data EEPROM. The STM8S microcontroller family reference manual (RM0016) refers to devices in this family as low-density. They provide the following benefits: performance, robustness, and reduced system cost.Device performance and robustness are ensured by advanced core and peripherals made in a state-of-the art technology, a 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 an integrated true data EEPROM for up to 300 k write/erase cycles and a high system integration level with internal clock oscillators, watchdog and brown-out reset.

Core

16 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline

Extended instruction set

Memories

Program memory: 8 Kbytes Flash; data retention 20 years at 55 °C after 10 kcycles

Data memory: 640 bytes true data EEPROM; endurance 300 kcycles

RAM: 1 Kbytes

Clock, reset and supply management

2.95 to 5.5 V operating voltage

Flexible clock control, 4 master clock sourcesLow power crystal resonator oscillatorExternal clock inputInternal, user-trimmable 16 MHz RCInternal low-power 128 kHz RC

Clock security system with clock monitor

Power management:Low-power modes (wait, active-halt, halt)Switch-off peripheral clocks individually

Permanently active, low consumption power-on and power-down reset

Interrupt management

Nested interrupt controller with 32 interrupts

Up to 27 external interrupts on 6 vectors

Timers

Advanced control timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization

16-bit general purpose timer, with 3 CAPCOM channels (IC, OC or PWM)

8-bit basic timer with 8-bit prescaler

Auto wake-up timer

Window watchdog and independent watchdog timers

Communication 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, ±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

Unique ID

96-bit unique key for each device