The STM32F407VET6 is an STMicroelectronics STM32F4 series MCU built around an ARM Cortex-M4 core with single-cycle DSP instructions and a floating-point unit. The 168 MHz clock rate gives it headroom for real-time control loops, sensor fusion, and audio processing that an M3 at comparable speed would struggle with on floating-point math. The 512 KB Flash and 192 KB SRAM are enough for a moderate firmware stack with a FreeRTOS or bare-metal scheduler, plus a TCP/IP buffer pool if you're using the on-chip Ethernet MAC. The peripheral set is the main event: Ethernet MAC with dedicated DMA, two CAN 2.0B interfaces, USB OTG HS/FS, three SPI, three I²C, six USARTs plus IrDA and LIN support, and a DCMI for camera input. The 82 GPIOs in the 100-LQFP package give enough breakout for a parallel LCD or an external memory bus via the FSMC controller. Brown-out reset, power-on reset, and a programmable voltage detector are built in, so external supervisor ICs are optional in most designs.
The internal oscillator can serve as the system clock for non-critical timing, though the Ethernet PHY will want an external 25 MHz crystal for accurate link rates.
ST continues to support the STM32F4 family with regular datasheet updates and errata revisions.