Attribute Parameter Value Product Catalog Microcontroller (MCU/MPU/SOC) CPU Core ARM Cortex-M4 Max CPU Frequency 150MHz CPU Bit Width 32 Bit Program Storage Capacity 256KB Program Memory Type FLASH RAM Capacity 32KB Attribute Parameter Value EEPROM Capacity - I/O Count 55 Oscillator Type Internal + External Operating Voltage 2.6V~3.6V Operating Temperature -40℃~+105℃ Functional Features Window Watchdog (WWDG); Independent Watchdog (IWDG); Brown-out Reset (BOR/LVD/LVR/LVI); Calendar Function; Power-On Reset (POR); Built-in General-Purpose Timer; Built-in Temperature Sensor; Hardware CRC; Integrated LDO