The STM8S903K3/F3 access line 8-bit microcontrollers offer 8 Kbyte 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.
Full documentation is offered as well as a wide choice of development tools.
**Key Features**
Core
16 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline
Extended instruction set
Memories
Program memory: 8 Kbyte Flash; data retention 20 years at 55 °C after 10 kcycle
Data memory: 640 byte true data EEPROM; endurance 300 kcycle
RAM: 1 Kbyte
Clock, reset and supply management
2.95 to 5.5 V operating voltage
Flexible clock control, 4 master clock sources
Low power crystal resonator oscillator
External clock input
Internal, user-trimmable 16 MHz RC
Internal 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 28 external interrupts on 7 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 7 multiplexed channels + 1 internal channel, scan mode and analog watchdog
Internal reference voltage measurement
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
