ARM® Cortex®-M3 32-bit MCU, Max Speed (MHz): 108; Memory (Bytes) Flash: 64K; Memory (Bytes) SRAM: 20K; I/O: up to 37; Timer GPTM (16bit): 3; Timer Advanced TM (16bit): 1; Timer SysTick (24bit): 1; Timer WDG: 2; Timer RTC: 1; Connectivity I2C: 2; Connectivity SPI: 2; Connectivity USB 2 FS: 1; Analog Interface 12bit ADC Units (CHs): 2(10); Package: LQFP48