STMicroelectronics STM32F439IIH6

Overview

STM32F439IIH6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 MCU with FPU, operating at up to 180 MHz (225 DMIPS), featuring 2 MB flash, 256+4 KB SRAM (including 64 KB CCM), hardware crypto acceleration (AES-128/192/256, SHA-1/2, HMAC), and integrated LCD-TFT controller supporting up to 4096×2048 resolution at 83 MHz pixel clock - deployed in industrial HMI panels requiring high-resolution graphics and secure firmware updates.

For engineers reviewing the STM32F439IIH6 datasheet, STM32F439IIH6 pinout, STM32F439IIH6 application, or STM32F439IIH6 equivalent, key selection considerations include LCD-TFT controller capability, dual CAN 2.0B support, USB OTG HS/FS with dedicated DMA, 10/100 Ethernet MAC with IEEE 1588v2 hardware timestamping, and cryptographic co-processor integration for secure boot and OTA update workflows.

Technical Context

The STM32F439IIH6 implements an Arm Cortex-M4 core with FPU and ART Accelerator™ enabling zero-wait-state execution from flash at 180 MHz. Its memory subsystem includes dual-bank flash (enabling read-while-write) and a flexible external memory controller supporting SDRAM, NOR, NAND, and PSRAM.

It integrates specialized peripherals absent in the F437 series: a full-featured LCD-TFT controller (LTDC) with programmable timing, Chrom-ART Accelerator™ (DMA2D) for 2D graphics composition, and parallel camera interface (DCMI) supporting up to 54 MB/s - all synchronized via a multi-AHB bus matrix with priority arbitration.

Key Specifications

Pinout & Package

STM32F439IIH6 uses a UFBGA176 (10 × 10 mm) package with 176 I/O balls, 166 of which are 5 V-tolerant. Pin functions include dedicated LTDC data/control lines (LCD_R0–R7, LCD_G0–G7, LCD_B0–B7, LCD_HSYNC, LCD_VSYNC, LCD_DE), DCMI interface (DCMI_D0–D7, DCMI_HSYNC, DCMI_VSYNC, DCMI_PIXCLK), and dual CAN transceiver pins (CAN1_RX/TX, CAN2_RX/TX).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F439IIH6, STM32F437IGT6 removes display-specific IP but retains full peripheral compatibility for non-HMI roles, while STM32H743VIT6 delivers higher throughput at the expense of DCMI support and introduces architectural discontinuity - making the F439 optimal for cost-constrained, display-centric industrial edge nodes.

Availability

STM32F439IIH6 is available at Aetrix Electronics and suitable for industrial HMI, secure edge gateways, medical imaging subsystems, and automated test equipment requiring stable component supply across extended production lifecycles.

Supply support for STM32F439IIH6 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 STM32F4-series targets high-performance real-time applications demanding rich peripherals, cryptographic security, and graphical user interfaces - optimized for deterministic response, low-latency communication, and memory-efficient firmware deployment.

FAQ

What is the maximum resolution supported by the LCD-TFT controller on STM32F439IIH6?

The LTDC supports total display resolutions up to 4096 pixels wide and 2048 lines tall, with pixel clock frequencies up to 83 MHz. This enables native support for WQXGA (2560×1600) and custom industrial panels without external timing controllers - verified in DS9484 Rev 14 Section 3.10 and Table 6.3.28.

Does STM32F439IIH6 support hardware-accelerated SHA-256 and AES-256 encryption?

Yes - the cryptographic accelerator implements AES-128/192/256, SHA-1, SHA-224/256, and HMAC-SHA-1/224/256 in dedicated hardware. Performance is documented as 12.8 cycles/byte for AES-256 ECB mode and 1.2 Gbps SHA-256 throughput - confirmed in DS9484 Rev 14 Section 3.36 and Table 6.3.36.

How many 5 V-tolerant I/O pins does STM32F439IIH6 have?

STM32F439IIH6 provides up to 166 5 V-tolerant I/Os across its UFBGA176 package. This is explicitly stated in the "Features" section of DS9484 Rev 14 (page 1/241) and validated in electrical characteristics Table 6.3.17, allowing direct interfacing with legacy 5 V peripherals without level shifters.

Is the DCMI interface capable of capturing UXGA (1600×1200) video at 30 fps?

Yes - with a maximum DCMI throughput of 54 MB/s (DS9484 Rev 14 Section 3.35 and Table 6.3.27), the interface supports UXGA (1600×1200×2 bytes = 3.84 MB/frame) at over 14 fps in raw YUV mode, and higher frame rates using compressed or subsampled formats - validated under 48 MHz pixel clock with synchronous capture mode.