STM32F407VET6 - 168MHz ARM Cortex-M4 MCU with FPU by STMicroelectronics

What Is STM32F407VET6 and How Does It Work?

The STM32F407VET6 is built around the ARM Cortex-M4F core - a 32-bit RISC processor that extends the Cortex-M3 architecture with a single-precision IEEE 754 FPU and a full DSP instruction set (SIMD, saturating arithmetic, multiply-accumulate). The FPU handles floating-point operations in hardware rather than software emulation, giving a 5–10× speedup for math-heavy algorithms like FFT, PID control, and sensor fusion.

The device uses a multi-layer AHB bus matrix with adaptive real-time (ART) accelerator for zero-wait-state execution from Flash at up to 168 MHz. A separate DMA controller with 16 streams and FIFO/burst support offloads data movement between peripherals and memory.

Position in the product line: The STM32F407VET6 is the mid-range member of the STM32F407 family. It sits between the STM32F407VGT6 (1024 KB Flash, same package) and the smaller STM32F405RGT6 (64-pin, no Ethernet). Its closest competitor is the NXP LPC54606 (Cortex-M4, 180 MHz). The STM32F407's advantage is its mature ecosystem, extensive middleware, and the largest community of any Cortex-M4 MCU.

What Are the Specifications of STM32F407VET6?

Key Parameter Commentary

• Core = Cortex-M4F @ 168 MHz: 210 DMIPS with hardware FPU. Roughly 2.3× the compute of STM32F103. The FPU alone makes a dramatic difference for FFT, motor control observers, audio DSP, and sensor fusion.
• Flash = 512 KB / SRAM = 192 KB: The 64 KB CCM is directly connected to the CPU core bus - zero contention, ideal for time-critical ISRs and real-time control loops. The remaining 128 KB SRAM is DMA-accessible for data buffers.
• LQFP-100 with FSMC: Interface directly with external SRAM, NOR Flash, PSRAM, and NAND Flash. Critical for large frame buffers (LCD displays, camera capture) or data logging.
• Ethernet + dual CAN + dual USB: Unique connectivity combination in LQFP-100. IEEE 1588v2 enables real-time industrial Ethernet (EtherCAT, PROFINET, Modbus TCP).
• ADC: 3× 2.4 MSPS: Triple interleaved mode reaches 7.2 MSPS - sufficient for high-speed current sensing in motor control and power electronics.
• 17 Timers including 2× 32-bit: 32-bit timers provide 6 ns resolution at 168 MHz. Two advanced motor control timers handle 3-phase BLDC/PMSM drives.

What Is STM32F407VET6 Used For?

Industrial Ethernet Gateways and PLCs

Ethernet MAC (10/100, IEEE 1588v2) + dual CAN + six serial ports make this the go-to MCU for industrial communication products. Run Modbus TCP, CANopen, and Modbus RTU simultaneously, bridging legacy factory floor networks to industrial IoT.

Motor Control and Drives

Dual advanced motor control PWM timers + 3× high-speed ADCs (7.2 MSPS interleaved) + FPU for sensorless FOC. Control two 3-phase motors simultaneously from a single chip. 32-bit timers provide the PWM resolution for high-precision servo drives.

Audio Processing and Voice Recognition

Cortex-M4 FPU + DSP instructions enable real-time FIR/IIR filtering, FFT analysis, audio codec processing, and voice activation. Combined with I²S audio interface and USB Audio Class for standalone USB audio devices.

Medical Devices

FPU handles diagnostic algorithms (ECG filtering, pulse oximetry). FSMC drives TFT displays. Ethernet/USB enables HL7 and DICOM communication.

Camera and Machine Vision

DCMI captures 8-14 bit parallel video at up to 54 MB/s. Combined with external memory via FSMC and DSP extensions for image processing, handles basic machine vision without external FPGA or application processor.

IoT Edge Gateways

Ethernet + dual USB + SDIO (for WiFi modules) + 512 KB Flash for LWIP + MQTT + TLS stacks. FPU handles sensor fusion and data aggregation.

Development and Ecosystem

Key Middleware: LWIP (TCP/IP), FreeRTOS, FatFS, USB Host & Device, mbedTLS (TLS/SSL), TouchGFX / LVGL (GUI)

Frequently Asked Questions About STM32F407VET6

Q1: What is the difference between STM32F407VET6 and STM32F103C8T6?

A: F407: Cortex-M4F with FPU, 168 MHz, 512 KB Flash, 192 KB SRAM, LQFP-100. Adds Ethernet, dual CAN, USB HS, camera interface. F103: Cortex-M3, 72 MHz, 64 KB Flash, 20 KB SRAM, LQFP-48. Choose F407 for performance, F103 for cost-sensitive designs.

Q2: Does STM32F407VET6 have a floating-point unit?

A: Yes. Single-precision IEEE 754 FPU built into Cortex-M4F. Hardware float gives 5–10× speedup over software emulation. Double-precision is not supported in hardware.

Q3: Can STM32F407VET6 run Linux?

A: No. Cortex-M4 has no MMU (required for Linux). Runs FreeRTOS, ThreadX, or bare-metal. For Linux-capable STM32, see STM32MP1 series (dual Cortex-A7 + M4).

Q4: What is the maximum Ethernet speed?

A: 10/100 Mbps. Requires external PHY (LAN8720A for RMII, DP83848 for MII). IEEE 1588v2 hardware timestamping for <1 μs synchronization accuracy.

Q5: How many PWM outputs can STM32F407VET6 generate?

A: Up to 30 PWM channels from 17 timers. Two advanced motor control timers each provide 6 complementary PWM outputs with dead-time for two 3-phase motor drives.

Q6: Is STM32F407VET6 compatible with STM32F103 pinout?

A: Not directly. F407 is LQFP-100, F103C8 is LQFP-48. However, the HAL API is shared across STM32 families, making software migration relatively easy.

Q7: What external memory can I connect via FSMC?

A: SRAM (up to 64 MB, 16-bit), NOR Flash, PSRAM, NAND Flash (up to 8 GB), and Compact Flash. For SDRAM, you need STM32F429 or higher with FMC controller.

Q8: What are the common counterfeit issues?

A: Relabeled lower-Flash variants, GD32F407 relabeled as STM32, pulled failed parts. Symptoms: incorrect UID, incorrect Flash size, or failure at 168 MHz. Source from ICMASS or other verified suppliers.

Pricing & Availability

Contact ICMASS for current pricing and stock availability. We carry original STMicroelectronics MCUs with full traceability and lot codes.