Description: CPU kernel: ARM Cortex-M0 CPU Max Main frequency: 64 MHz Operating voltage Range: 2V~3.6V internal oscillator: program FLASH capacity: 32K@x8bit RAM Total capacity: 8KB GPIO Port number: 29 ADC (number of channels / number / digits): 1@x18ch / 12bit peripheral / function / protocol stack: undervoltage detection / reset; DMA