Description: CPU kernel: ARM Cortex-M0 CPU Maximum primary frequency: 48 MHz Operating Voltage Range: 1.8V~5.5V Internal Oscator: External Clock frequency Range: 4 MHz ~ 32 MHz Program FLASH Capacity: 128KB RAM Total capacity: 16KB EEPROM / Data FLASH Capacity: -GPIO port number: 86 ADC (unit / channel number / bit