Description
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.

FEATUREs
■ Core
   – Max fCPU: up to 24 MHz, 0 wait states @
      fCPU ≤ 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