STMicroelectronics STM32F746IET6

Overview

STM32F746IET6 from STMicroelectronics is a high-performance ARM Cortex-M7 microcontroller with FPU, 216 MHz max clock, 1 MB Flash, 320+16+4 KB RAM, integrated LCD-TFT controller, dual CAN, USB OTG HS/FS, and 10/100 Ethernet MAC. It serves as the main application processor in industrial HMI, medical imaging front-ends, and networked embedded gateways requiring real-time graphics and connectivity.

For engineers reviewing the STM32F746IET6 datasheet, STM32F746IET6 pinout, STM32F746IET6 application, or STM32F746IET6 equivalent, key selection criteria include its 216 MHz Cortex-M7 core with ART Accelerator™, dual-mode Quad-SPI interface, Chrom-ART Accelerator™ for DMA2D graphics rendering, and IEEE 1588v2–capable Ethernet MAC with dedicated DMA.

Technical Context

The STM32F746IET6 implements an Arm Cortex-M7 core with FPU, adaptive real-time accelerator (ART Accelerator™), and separate 4 KB instruction and 4 KB data L1 caches-enabling zero-wait-state execution from Flash and external memories. Its memory subsystem includes 320 KB SRAM (64 KB DTCM + 16 KB ITCM + 4 KB backup), plus flexible external memory controller supporting SDRAM, NOR/NAND, and PSRAM.

It integrates dual USB controllers (OTG_FS with on-chip PHY; OTG_HS with ULPI support), a full-featured 10/100 Ethernet MAC with IEEE 1588v2 hardware timestamping, and a parallel 8–14-bit camera interface capable of 54 MB/s throughput-making it suitable for vision-enabled edge nodes with deterministic timing and multi-interface concurrency.

Key Specifications

Pinout & Package

LQFP100 package (14 × 14 mm, 0.5 mm pitch), 100-pin quad flat with exposed thermal pad. Pinout supports full peripheral multiplexing including dual USB PHYs, Ethernet RMII/MII, LCD parallel interface (8080/6800), DCMI, and FMC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance Cortex-M7 MCU applications.

Compared with STM32F746IET6, STM32H743VIT6 delivers 2.2× higher DMIPS but sacrifices integrated LCD-TFT and Chrom-ART-requiring external graphics IP-while STM32F767ZIT6 offers double Flash/RAM and crypto engines in a larger package, better suited for secure IoT gateways than compact HMIs.

Availability

STM32F746IET6 is available at Aetrix Electronics and suitable for industrial HMI, medical imaging front-ends, and networked energy gateways requiring stable component supply, long-term lifecycle assurance, and qualified production lots.

Supply support for STM32F746IET6 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 strong industrial and embedded market focus.

The STM32F7 series targets high-end real-time applications demanding both computational performance and rich peripheral integration-including graphics, connectivity, and analog-without external co-processors.

FAQ

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

The STM32F746IET6 achieves 216 MHz maximum CPU frequency using its Arm Cortex-M7 core with FPU and ART Accelerator™. This requires enabling the 4 KB instruction and data caches, configuring the PLL with appropriate VCO and dividers, and supplying stable 1.7–3.6 V power with proper VCAP1/VCAP2 decoupling capacitors per Section 6.3.2 of DS10916 Rev 5.

Does STM32F746IET6 support external SDRAM, and what interface is used?

Yes, STM32F746IET6 supports external SDRAM up to 256 MB via its Flexible Memory Controller (FMC) with 32-bit data bus. The FMC provides dedicated SDRAM timing control, refresh management, and bank addressing-fully documented in Section 3.8 and Table 11 of DS10916 Rev 5-and is accessible on specific GPIO banks (e.g., PF0–PF15, PG0–PG15).

Can the LCD-TFT controller drive a 1024×768 (XGA) display without external components?

Yes-the integrated LCD-TFT controller supports XGA resolution (1024×768) with 24-bit RGB interface and hardware pixel blending via Chrom-ART Accelerator™. It requires only passive termination resistors and proper power sequencing; no external display controller or frame buffer RAM is needed, as internal SRAM (DTCM/AXI) serves as active framebuffer.

What debug interfaces are supported and what trace capability exists?

The STM32F746IET6 supports SWD and JTAG debug interfaces via dedicated pins (SWCLK, SWDIO, JTCK, JTMS, etc.), and includes Cortex-M7 Trace Macrocell™ (MTB) for instruction and data trace. Full trace bandwidth requires external trace port analyzer; MTB supports circular buffer capture of recent execution flow for post-mortem analysis without external hardware.