CPU kernel: ARM Cortex-M4 CPU Maximum main frequency: 168 MHz operating voltage range: 1.8V~3.6V internal oscillator: program FLASH capacity: 1MB RAM Total capacity: 192KB GPIO port number: 114 ADC (number of cells / channels / number of digits): 1@x24ch / 12bit DAC (number of cells / channels / number of digits): 1@x2ch / 12bit peripherals / work