72 MHz Cortex-M4 with FPU — the throughput ceiling for control loops
The STM32F301C8T7 runs a single ARM Cortex-M4 core at 72 MHz, with a hardware FPU and single-cycle MAC — this is the arithmetic throughput that matters for a motor-control PI loop or a sensor-fusion filter, not just the raw clock rate. 64 KB of on-chip flash and 16K x 8 SRAM set the firmware budget: after the HAL and RTOS overhead, roughly 48-52 KB remains for the application image and about 8-10 KB for the stack, heap, and DMA buffers.
Industrial temperature grade and the board-fit checklist
The 48-LQFP (7x7 mm) package with 0.50 mm pitch demands a 4-layer PCB for reliable fan-out of the inner rows; a two-layer board breaks out only the peripheral pins on the outer rows and leaves the power/ground core pins on inner rows unconnected unless micro-vias are used.
Peripheral mix — what the ADC, DAC, and serial interfaces actually support
Eight 12-bit ADC channels and a single 12-bit DAC give enough analog front-end for a three-phase BLDC current-sense chain (two phases sensed, third reconstructed) plus one analog output for a setpoint or monitor.
ROHS3 compliant — no exemption-driven supply chain constraints; the part ships in a standard tray (260-piece reel-equivalent for the LQFP-48 format).