STMicroelectronics STM3240G-ETH/NMF

Overview

STM32F407VG from STMicroelectronics is a 32-bit Arm® Cortex®-M4 MCU with FPU, operating at up to 168 MHz, featuring 1 MB flash, 192+4 KB SRAM (including 64 KB CCM), integrated 10/100 Ethernet MAC with IEEE 1588v2 hardware support, and USB OTG HS/FS controllers. It serves as a main application processor in industrial gateways requiring deterministic real-time control, networked I/O, and protocol bridging.

For engineers reviewing the STM32F407VG datasheet, STM32F407VG pinout, STM32F407VG application, or STM32F407VG equivalent, this part supports dual USB OTG operation, hardware-accelerated Ethernet timing, triple interleaved ADC sampling at 7.2 MSPS, and camera interface up to 54 MB/s - critical for edge node design with vision + connectivity.

Technical Context

The device integrates an Adaptive Real-time Accelerator (ART) enabling zero-wait-state execution from flash at 168 MHz, paired with a memory protection unit (MPU) and dual-bank flash for secure firmware updates. Its Ethernet MAC includes dedicated DMA and MII/RMII physical layer support, with hardware timestamping compliant to IEEE 1588v2 for sub-microsecond time synchronization.

It features three 12-bit ADCs (24-channel total), two 12-bit DACs, 17 timers (including two 32-bit advanced-control timers), and dual CAN 2.0B interfaces - enabling simultaneous motor control, analog sensing, and fieldbus communication in a single chip.

Key Specifications

Pinout & Package

LQFP100 package with 0.5 mm pitch, 14 × 14 mm body, exposed thermal pad (not electrically connected), RoHS-compliant and ECOPACK2 certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VG, the STM32H743VI delivers 2.3× higher integer performance but increases system cost and design effort due to external PHY dependency, while the STM32F767ZI trades IEEE 1588v2 compliance for raw processing headroom - making the F407VG optimal for cost-sensitive, time-aware industrial Ethernet nodes.

Availability

STM32F407VG is available at Aetrix Electronics and suitable for industrial gateways, smart camera nodes, medical data loggers, and energy monitoring hubs requiring stable component supply and long-term production support through March 2026.

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, designing and manufacturing microcontrollers, power ICs, sensors, and automotive-grade components since 1987.

The STM32F4 series targets high-performance real-time embedded systems demanding rich peripheral integration, deterministic timing, and industrial-grade reliability - especially where Ethernet, USB, and analog signal processing converge.

FAQ

Does STM32F407VG include an integrated Ethernet PHY?

No. The STM32F407VG integrates only the Ethernet MAC layer with dedicated DMA and IEEE 1588v2 timestamping logic. An external PHY (e.g., LAN8720A or DP83848) is required for physical layer signaling via MII or RMII interface. Pin assignments for RMII (e.g., PH13–PH15, PI0–PI10) are fixed and non-remappable.

What is the maximum achievable ADC sampling rate in interleaved mode?

In triple interleaved mode, the STM32F407VG achieves 7.2 MSPS aggregate sampling across all three 12-bit ADCs, with each ADC contributing 2.4 MSPS. This requires synchronous trigger configuration and uses shared DMA channels; actual sustained throughput depends on bus arbitration and memory bandwidth.

Can the USB OTG HS interface operate without an external PHY?

No. The USB OTG HS interface relies on ULPI (UTMI+ Low Pin Count) signaling and requires an external high-speed PHY (e.g., USB3300 or TUSB1210). The chip provides only the ULPI bus interface (PB12–PB15, PC0) and associated clock/control signals - no on-die HS transceiver is present.

Is the CCM (Core Coupled Memory) accessible by DMA controllers?

No. The 64 KB CCM RAM is accessible exclusively by the Cortex-M4 CPU core and cannot be targeted by any DMA channel. It is intended for low-latency stack storage, critical ISR variables, or real-time control buffers where cache coherency or DMA contention must be avoided.