STMicroelectronics STM32F205RFT6

Overview

STM32F205RFT6 from STMicroelectronics is a 32-bit Arm® Cortex®-M3 microcontroller operating at up to 120 MHz, featuring 768 KB Flash, 96 KB SRAM (128+4 KB total), dual CAN 2.0B interfaces, and integrated 10/100 Ethernet MAC with IEEE 1588v2 hardware support. It delivers 150 DMIPS performance via ART Accelerator™ and targets industrial connectivity gateways requiring deterministic real-time control, secure firmware updates, and multi-protocol fieldbus integration.

For engineers reviewing the STM32F205RFT6 datasheet, STM32F205RFT6 pinout, STM32F205RFT6 application, or STM32F205RFT6 equivalent, key selection criteria include Ethernet MAC timing compliance, dual-CAN bus arbitration latency, USB OTG HS/FS PHY coexistence, and FSMC interface support for NOR/NAND external memory expansion in edge-node controllers.

Technical Context

The STM32F205RFT6 implements a tightly coupled Cortex-M3 core with Memory Protection Unit (MPU) and Adaptive Real-Time Accelerator (ART) enabling zero-wait-state execution from Flash. Its multi-AHB bus matrix concurrently serves CPU, DMA, and peripheral domains without arbitration stalls.

It integrates dual USB controllers - one full-speed OTG with on-chip PHY, another high-speed/full-speed OTG with dedicated DMA and ULPI interface - alongside a fully featured 10/100 Ethernet MAC supporting MII/RMII physical layer modes and IEEE 1588v2 timestamping for time-sensitive networking applications.

Key Specifications

Pinout & Package

LQFP64 package with exposed thermal pad; 64-pin quad flat pack, 0.5 mm pitch, RoHS-compliant, rated for industrial temperature range (–40°C to +105°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F207VCT6, the RFT6 offers identical Ethernet/USB/CAN functionality in compact LQFP64 form, while STM32H743VIT6 trades integrated hardware timestamping for higher CPU performance - making the RFT6 optimal for space-constrained, time-deterministic industrial gateways.

Availability

STM32F205RFT6 is available at Aetrix Electronics and suitable for industrial Ethernet gateways, multi-protocol fieldbus controllers, and secure firmware update nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32F205RFT6 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, and automotive ICs with vertical manufacturing capabilities.

The STM32F2 series targets high-performance industrial connectivity, emphasizing integrated Ethernet, dual CAN, USB OTG, and real-time determinism - designed specifically for programmable logic controllers, motor drives, and edge IoT gateways.

FAQ

What is the maximum operating frequency of the STM32F205RFT6 core?

The STM32F205RFT6 features an Arm Cortex-M3 core rated for up to 120 MHz operation. This frequency is achievable with the Adaptive Real-Time Accelerator (ART) enabled and proper power supply decoupling per Section 6.3.2 of DS6329 Rev 18. The core delivers 150 DMIPS at this speed, validated under industrial temperature conditions (–40°C to +105°C).

Does the STM32F205RFT6 support hardware-based IEEE 1588v2 timestamping?

Yes, the STM32F205RFT6 integrates IEEE 1588v2 hardware timestamping within its Ethernet MAC peripheral. This enables sub-microsecond packet timestamp accuracy without CPU intervention, as confirmed in Section 3.26 of DS6329 Rev 18. The feature supports both one-step and two-step clock synchronization modes for precision time protocol implementation.

How many 5 V-tolerant I/O pins does the LQFP64 variant provide?

The STM32F205RFT6 in LQFP64 package provides up to 51 5 V-tolerant I/O pins, as specified in Section 2.2 of DS6329 Rev 18. These pins tolerate 5 V inputs while operating from a 1.8–3.6 V supply, enabling direct interface with legacy industrial sensors and actuators without level-shifting circuitry.

Can the STM32F205RFT6 execute code directly from external NOR flash via FSMC?

Yes, the Flexible Static Memory Controller (FSMC) supports direct execution from external NOR flash memory. Section 3.9 of DS6329 Rev 18 confirms that FSMC enables address/data multiplexing and wait-state insertion for reliable XIP (eXecute-In-Place) operation, with timing parameters defined in Table 25 of Section 6.3.25 for 70 ns access cycles.