The STM8L101xx is an 8-bit ultralow power microcontroller with features including multifunction timers, comparators, USART, SPI, and I2C. It operates at a supply voltage range of 1.65V to 3.6V and offers low power consumption, high performance, and a wide temperature range. It supports up to 8 Kbytes of Flash program and up to 2 Kbytes of data EEPROM with flexible write and read protection modes. In addition, it provides various clock management, reset and supply management, interrupt management, I/Os, and other peripherals.