STMicroelectronics STM32F405RGT7

Overview

STM32F405RGT7 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 168 MHz (210 DMIPS), featuring 1 MB flash, 192+4 KB SRAM (including 64 KB CCM), USB OTG HS/FS, 10/100 Ethernet MAC with IEEE 1588v2 support, and dual CAN 2.0B interfaces - deployed in industrial gateways requiring real-time connectivity and deterministic communication.

For engineers reviewing the STM32F405RGT7 datasheet, STM32F405RGT7 pinout, STM32F405RGT7 application, or STM32F405RGT7 equivalent, key selection considerations include its 168 MHz CPU clock with ART Accelerator for zero-wait-state flash execution, triple 12-bit ADCs (7.2 MSPS interleaved), parallel camera interface (DCMI), and dual USB OTG controllers with dedicated DMA - critical for embedded vision, protocol bridging, and time-sensitive networking designs.

Technical Context

The STM32F405RGT7 integrates an Arm Cortex-M4 core with hardware FPU and DSP instructions, coupled with ST's Adaptive Real-Time (ART) Accelerator enabling deterministic 168 MHz execution from internal flash memory. Its multi-AHB bus matrix supports concurrent access to flash, SRAM, and peripherals without contention.

It implements a full-featured connectivity stack: dual USB OTG (FS + HS with ULPI), 10/100 Ethernet MAC with IEEE 1588v2 hardware timestamping, two bxCAN 2.0B controllers, SDIO, and an 8–14-bit parallel DCMI interface capable of 54 MB/s - enabling simultaneous high-bandwidth data acquisition and protocol offloading.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad (ECOPACK2-compliant). Pin count: 64 leads; 51 user I/Os + 13 power/ground/reset/clock pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F407VGT6, the STM32F405RGT7 offers identical peripheral sets in a compact LQFP64 package but lacks Ethernet PHY pins and FSMC expansion capability; versus STM32H743VIT6, it delivers proven real-time determinism and DCMI support at lower power and cost, though with less raw compute headroom.

Availability

STM32F405RGT7 is available at Aetrix Electronics and suitable for industrial gateways, embedded vision systems, USB-C protocol adapters, and high-performance motor control hubs requiring stable component supply through 2028 and beyond.

Supply support for STM32F405RGT7 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, specializing in microcontrollers, power management, sensors, and automotive ICs - with over 40 years of industrial-grade silicon expertise.

The STM32F4 series targets high-performance real-time embedded applications demanding rich connectivity, analog precision, and deterministic execution - designed specifically for industrial automation, medical instrumentation, and advanced human-machine interfaces.

FAQ

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

The STM32F405RGT7 achieves 168 MHz maximum CPU frequency using its Arm Cortex-M4 core with FPU and ST's Adaptive Real-Time (ART) Accelerator. This accelerator employs prefetch, branch prediction, and cache-like buffering to deliver zero-wait-state execution from flash memory - verified per DS8626 Rev 12 Section 3.2 and Table 36 (PLL characteristics).

Does the STM32F405RGT7 support hardware encryption or secure boot?

No, the STM32F405RGT7 does not integrate hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It includes a true random number generator (RNG) and 96-bit unique ID for key derivation, but encryption must be implemented in software or via external secure elements - confirmed in DS8626 Sections 3.33 and 3.38.

Can the DCMI interface operate without external frame buffers?

Yes - the DCMI supports direct DMA transfer to internal SRAM or CCM RAM at up to 54 MB/s (DS8626 Section 3.32, Table 67). With 192 KB main SRAM + 64 KB CCM, it can buffer multiple VGA frames (e.g., ~3× 640×480×2 bytes) without external memory, provided application firmware manages DMA double-buffering and interrupt latency.

What are the key differences between STM32F405RGT7 and STM32F405VGT6?

The STM32F405RGT7 uses LQFP64 packaging (64-pin), while STM32F405VGT6 uses LQFP100 (100-pin). Both share identical core, flash, RAM, and peripheral specifications per DS8626 Table 1, but the VGT6 variant provides additional GPIOs, FSMC signals, and Ethernet PHY interface pins - making it suitable for designs requiring external SDRAM or integrated PHY routing.