The STM8S20xxx performance line 8-bit microcontrollers offer from 32 to 128 Kbytes Flash program memory. They are referred to as high-density devices in the STM8S microcontroller family reference manual.

All STM8S20xxx devices provide the following benefits: reduced system cost, performance 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 20 MIPS at 24 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 a common family product architecture with compatible pinout, memory map and modular peripherals. Full documentation is offered with a wide choice of development tools.

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.

• Core
  • Max f_CPU: up to 24 MHz, 0 wait states @ f_CPU≤ 16 MHz
  • Advanced STM8 core with Harvard architecture and 3-stage pipeline
  • Extended instruction set
  • Max 20 MIPS @ 24 MHz
• Memories
  • Program: up to 128 Kbytes Flash; data retention 20 years at 55 °C after 10 kcycles
  • Data: up to 2 Kbytes true data EEPROM; endurance 300 kcycles
  • RAM: up to 6 Kbytes
• Clock, reset and supply management
  • 2.95 to 5.5 V operating voltage
  • 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
  • Wait, active-halt, & halt low power modes
  • Peripheral clocks switched off 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
  • 2x 16-bit general purpose timers, with 2+3 CAPCOM channels (IC, OC or PWM)
  • Advanced control timer: 16-bit, 4 CAPCOM channels, 3 complementary outputs, dead-time insertion and flexible synchronization
  • 8-bit basic timer with 8-bit prescaler
  • Auto wakeup timer
  • Window watchdog, independent watchdog
• Communications interfaces
  • High speed 1 Mbit/s active beCAN 2.0B
  • UART with clock output for synchronous operation - LIN master mode
  • UART with LIN 2.1 compliant, master/slave modes and automatic resynchronization
  • SPI interface up to 10 Mbit/s
  • I²C interface up to 400 Kbit/s
• 10-bit ADC with up to 16 channels
• I/Os
  • Up to 68 I/Os on an 80-pin package including 18 high sink outputs
  • Highly robust I/O design, immune against current injection
  • Development support
  • Single wire interface module (SWIM) and debug module (DM)
• 96-bit unique ID key for each device