Description: CPU kernel: ARM Cortex-M0 CPU Maximum primary frequency: 32 MHz Operating Voltage Range: 1.8V~5.5V Internal Oscillator: External clock frequency range: 4 MHz ~ 32 MHz Program FLASH capacity: 32KB RAM Total capacity: 4KB EEPROM / Data FLASH capacity: -GPIO port number: 16 ADC (cell number / channel number / number of digits)