STMicroelectronics STM3240G-SK/KEI

Overview

STM32F407VG from STMicroelectronics is a 32-bit Arm® Cortex®-M4 MCU with FPU, operating up to 168 MHz, featuring 1 MB flash, 192+4 KB SRAM (including 64 KB CCM), dual CAN 2.0B interfaces, 10/100 Ethernet MAC with IEEE 1588v2 hardware support, and USB OTG HS/FS controllers - deployed in industrial gateway controllers requiring real-time protocol bridging and deterministic network timing.

For engineers reviewing the STM32F407VG datasheet, STM32F407VG pinout, STM32F407VG application, or STM32F407VG equivalent, key selection criteria include Ethernet MAC timing compliance, dual-CAN arbitration latency, ART Accelerator-enabled zero-wait-state flash execution at 168 MHz, and VBAT-backed RTC calendar accuracy for time-stamped event logging.

Technical Context

The device integrates an Adaptive Real-Time (ART) Accelerator enabling deterministic 0-wait-state execution from flash memory at full 168 MHz CPU frequency, coupled with a multi-AHB bus matrix for concurrent peripheral access. Its embedded Ethernet MAC includes dedicated DMA and hardware timestamping per IEEE 1588v2, supporting precise PTP synchronization in industrial automation nodes.

It implements dual bxCAN controllers with 28 filter banks and FIFO-based message handling, plus a parallel DCMI interface capable of 54 MB/s throughput for machine vision preprocessing. The dual USB OTG controllers - one full-speed with on-chip PHY, one high-speed with ULPI support and dedicated DMA - enable simultaneous host/device roles in embedded USB-compliant edge devices.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm) package with 100-pin quad flat pack, ECOPACK2-compliant, 0.5 mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance ARM Cortex-M4 microcontroller applications.

Compared with STM32F407VG, the STM32F407IG offers greater I/O density and memory expandability in larger footprint, while the MK66FN2M0VLQ18 trades networking features for higher CPU clock and motor control peripherals - making the VG variant optimal for space-constrained, connectivity-intensive edge nodes.

Availability

STM32F407VG is available at Aetrix Electronics and suitable for industrial gateways, automotive diagnostic tools, machine vision edge nodes, and secure IoT gateways requiring stable component supply across extended production lifecycles.

Supply support for STM32F407VG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, sensors, and automotive ICs.

The STM32F4-series targets high-performance embedded applications demanding real-time processing, rich connectivity, and deterministic timing - especially industrial control, motor drives, and networked edge devices.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32F407VG achieves 168 MHz maximum CPU frequency using its internal PLL with HSE (4–26 MHz) or HSI (16 MHz) as source, combined with the ART Accelerator to eliminate flash wait states. This allows deterministic real-time execution without external SRAM, verified under 1.8–3.6 V supply and ambient temperatures from –40°C to +85°C per DS8626 Rev 12.

Does this MCU support hardware-accelerated cryptography?

No, the STM32F407VG does not integrate dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It includes a True Random Number Generator (RNG) and CRC calculation unit, but encryption/decryption must be implemented in software or via external secure elements - unlike later STM32H7 or STM32L5 series which embed crypto co-processors.

Can the Ethernet MAC operate in RMII mode with external PHY?

Yes, the integrated 10/100 Ethernet MAC supports both MII and RMII physical layer interfaces. In RMII mode, it requires only 9 pins (REF_CLK, CRS_DV, RXD0/RXD1, TX_EN, TXD0/TXD1, and MDIO/MDC for PHY management), enabling compact, low-pin-count Ethernet connectivity with standard PHYs like LAN8720A or DP83848.

What is the purpose of the CCM (Core Coupled Memory) SRAM?

The 64 KB CCM SRAM is a CPU-exclusive memory block not accessible by DMA or other bus masters. It provides ultra-low-latency storage for critical real-time tasks - such as interrupt service routine stacks, control law coefficients, or safety-critical variables - ensuring deterministic execution without bus arbitration delays or cache misses.