72 MHz Cortex-M4 with DSP instructions — the throughput for mixed-signal control
The STM32F303RBT6TR: The DSP extension and floating-point unit handle real-time math for motor-control loops and sensor fusion without offloading to a coprocessor. On-chip memory: 128 KB flash for firmware and bootloader, plus 32 KB SRAM for data buffers and stack. The 52 GPIOs give headroom for parallel sensor arrays or a 16-bit parallel LCD bus alongside the usual UART and SPI peripherals.
Analog integration — 22 ADC channels and dual DAC on a single die
22 analog inputs feed a 12-bit ADC with up to 5 Msps — enough to sample three-phase motor currents and a resolver position in a single PWM cycle. Two 12-bit DAC outputs generate analog setpoints or waveform references without an external SPI DAC. The peripheral set includes CAN, SPI, I2C, UART/USART, USB, and LINbus — the CAN interface connects to industrial fieldbus gateways, while the SPI and I2C lanes talk to external ADCs, encoders, or display drivers. DMA offloads the core during high-rate data transfers.
Industrial temperature grade and package for rework-friendly assembly
The gull-wing leads are hand-solderable with a fine-tip iron — a rework station can pull and replace this part without hot-air preheat. The tape-and-reel packaging (TR suffix) suits pick-and-place for production runs.
Active lifecycle — no LTB clock ticking
The base product number STM32F303 covers a family of pin-compatible variants with different flash and SRAM sizes — if a future design needs more memory, the PCB footprint stays the same.