72 MHz Cortex-M4 with FPU — what it means for the control loop
The STM32F301C6T7 is a 32-bit ARM Cortex-M4 MCU from ST's STM32F3 series, clocked at 72 MHz with a single-cycle multiply-and-accumulate and a hardware FPU. That FPU is the reason to pick this part over an M3 or M0+ at the same speed — it handles floating-point PID coefficients or sensor fusion trig without a software library eating cycles. The 32 KB Flash and 16 KB RAM are sized for a single motor drive, a digital power converter, or a sensor hub running one control loop; if your firmware needs a second comm stack or a bootloader plus an application, you'll be counting bytes. 37 I/O in a 48-LQFP gives enough PWM channels and ADC inputs for a three-phase inverter with Hall sensors, but not enough for a multi-axis servo controller.
Industrial temperature range and on-chip peripherals
Rated for -40 to 105 °C. Internal oscillator saves a crystal for UART and I²C. On-chip DMA, I²S, POR, PWM, WDT. Supply range is 2 V to 3.6 V.