Features: Core: 32-bit ARM Cortex-M4 CPU with FPU, Adaptive Real-Time Accelerator (ART Accelerator) allows zero-wait-state execution from flash, frequency up to 84 MHz, Memory Protection Unit, 105 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1), and DSP instructions. Memory: Up to 512 KB of flash; up to 96 KB of SRAM. Clock, Reset and Power Management: 1.7 V to 3.6 V application power and I/O; POR, PDR, PVD and BOR; 4 to 26 MHz crystal oscillator; internal 16 MHz factory-calibrated RC; 32 kHz oscillator for RTC, with calibration; internal 32 kHz RC, with calibration.