Core Processor ARM Cortex-M3 Core Size 32-Bit Speed 72MHz Peripherals DMA, Motor Control PWM, PDR, POR, PVD, PWM, Temp Sensor, WDT Number of I/O 80 Program Memory Size 256KB (256K x 8) Program Memory Type FLASH Voltage - Supply (Vcc/Vdd) 2 V ~ 3.6 V Data Converters A/D 16x12b; D/A 2x12b Oscillator Type Internal datasheet: http://www.st.com/content/ccc/resource/technical/document/datasheet/59/f6/fa/84/20/4e/4c/59/CD00191185.pdf/files/CD00191185.pdf/jcr:content/translations/en.CD00191185.pdf