The STM8S105x4/6 access line 8-bit microcontrollers offer from 16 to 32 Kbyte Flash program memory, plus integrated true data EEPROM. The STM8S microcontroller family reference manual (RM0016) refers to devices in this family as medium-density. All devices of the STM8S105x4/6 access line provide the following benefits: reduced system cost, performance and robustness, short development cycles, and product longevity.
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.
Device performance is ensured by a 16 MHz CPU clock frequency and enhanced characteristics which include robust I/O, independent watchdogs (with a separate clock source), and a clock security system.
Short development cycles are guaranteed due to application scalability across common family product architecture with compatible pinout, memory map and modular peripherals.
Product longevity is ensured in the STM8S family thanks to their advanced core which is made in a state-of-the-art technology for applications with 2.95 V to 5.5 V operating supply.
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: up to 32 Kbyte Flash; data retention 20 years at 55 °C after 10 kcycle
Data memory: up to 1 Kbyte true data EEPROM; endurance 300 kcycle
RAM: up to 2 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 37 external interrupts on 6 vectors
Timers
Advanced control timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization
2x16-bit general purpose timer, with 2+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 10 multiplexed channels, scan mode and analog watchdog
I/Os
Up to 38 I/Os on a 48-pin package including 16 high sink outputs
Highly robust I/O design, immune against current injection
