Features:

• Operating conditions
– Operating power supply: 1.8 V to 3.6 V
Temperature range: −40 °C to 85 °C
• Low power features
– 5 low power modes: Wait, Low power run
(5.1 µA), Low power wait (3 µA), Active-halt
with RTC (1.3 µA), Halt (350 nA)
– Ultra-low leakage per I/0: 50 nA
– Fast wakeup from Halt: 5 µs
• Advanced STM8 core
– Harvard architecture and 3-stage pipeline
– Max freq: 16 MHz, 16 CISC MIPS peak
– Up to 40 external interrupt sources
• Reset and supply management
– Low power, ultra-safe BOR reset with 5
selectable thresholds
– Ultra-low power POR/PDR
– Programmable voltage detector (PVD)
• Clock management
– 32 kHz and 1 to 16 MHz crystal oscillators
– Internal 16 MHz factory-trimmed RC
– Internal 38 kHz low consumption RC
– Clock security system
• Low power RTC
– BCD calendar with alarm interrupt
– Digital calibration with +/- 0.5 ppm accuracy
– LSE security system
– Auto-wakeup from Halt w/ periodic interrupt
• Memories
– 8 Kbytes of Flash program memory and
256 bytes of data EEPROM with ECC
– Flexible write and read protection modes
– 1 Kbyte of RAM

• DMA
– 4 channels supporting ADC, SPI, I2C,
USART, timers
– 1 channel for memory-to-memory
• 12-bit ADC up to 1 Msps/28 channels
– Internal reference voltage
• Timers
– Two 16-bit timers with 2 channels (used as
IC, OC, PWM), quadrature encoder
– One 8-bit timer with 7-bit prescaler
– 2 watchdogs: 1 Window, 1 Independent
– Beeper timer with 1, 2 or 4 kHz frequencies
• Communication interfaces
– Synchronous serial interface (SPI)
– Fast I2C 400 kHz SMBus and PMBus
– USART
• Up to 18 I/Os, all mappable on interrupt vectors
• Development support
– Fast on-chip programming and nonintrusive
debugging with SWIM
– Bootloader using USART