STMicroelectronics STM32H743IIK6

Overview

STM32H743IIK6 from STMicroelectronics is a 32-bit Arm® Cortex®-M7 microcontroller operating at up to 480 MHz, featuring 2 MB flash, 1 MB RAM (including 192 KB TCM), dual-bank read-while-write capability, and integrated FPU with L1 cache. It integrates dual CAN FD controllers, Ethernet MAC, LCD-TFT controller, JPEG codec, and hardware-accelerated DMA2D for high-performance industrial HMI and real-time control applications.

For engineers reviewing the STM32H743IIK6 datasheet, STM32H743IIK6 pinout, STM32H743IIK6 application, or STM32H743IIK6 equivalent, key selection criteria include its 480 MHz M7 core performance, dual-domain power management (D1/D2/D3), 168 GPIOs with interrupt capability, and support for time-critical firmware execution in ITCM/DTCM RAM.

Technical Context

The STM32H743IIK6 implements a three-domain power architecture (D1 high-performance, D2 communication/timers, D3 reset/clock/power), enabling selective clock gating and domain shutdown. Its interconnect matrix comprises one AXI and two AHB bus matrices with five AHB2-APB bridges, supporting concurrent high-bandwidth peripheral access without CPU contention.

It features three independent PLLs - one system clock PLL and two kernel-clock PLLs with fractional mode - enabling precise clock tree configuration for mixed-signal timing requirements. The device supports simultaneous operation of multiple high-speed interfaces including USB OTG HS/FS, SDMMC (125 MHz), Quad-SPI (133 MHz), and SPDIFRX, coordinated via four DMA controllers including MDMA with linked-list support.

Key Specifications

Pinout & Package

STM32H743IIK6 uses the UFBGA176+25 package: 10 × 10 mm body, 0.65 mm ball pitch, 176 signal balls plus 25 dedicated ground balls for EMI suppression and power integrity. Ball layout follows ST's standardized BGA mapping for STM32H743xI/G series, with VCAP pins (VCAP1/VCAP2) located adjacent to VDD/VSS pairs for decoupling stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H753IIK6, the STM32H743IIK6 trades cryptographic acceleration for lower cost and identical non-secure firmware execution capability; versus i.MX RT1176DVMAA, it offers simpler BOM (no external flash/DDR), deterministic single-core latency, and broader ecosystem tooling for industrial firmware development.

Availability

STM32H743IIK6 is available at Aetrix Electronics and suitable for industrial HMI, medical imaging edge nodes, automotive ADAS gateways, and energy monitoring IoT gateways requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for STM32H743IIK6 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 vertical manufacturing and broad IP portfolio.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, rich connectivity, and graphical user interfaces - designed specifically for industrial automation, medical devices, and automotive telematics where performance-per-watt and peripheral integration are critical.

FAQ

What is the maximum operating frequency of the STM32H743IIK6 core?

The STM32H743IIK6 features an Arm Cortex-M7 core rated for up to 480 MHz operation under specified voltage and temperature conditions. This frequency is achievable with proper PCB layout, VCAP capacitor placement, and thermal management. The core delivers 1027 DMIPS at this speed, validated per Dhrystone 2.1 benchmark with L1 cache enabled.

Does the STM32H743IIK6 support hardware encryption?

No, the STM32H743IIK6 does not integrate cryptographic accelerators such as AES, PKA, or HASH engines. Those features are present in the pin-compatible STM32H753IIK6 variant. For secure boot or data encryption, software libraries (e.g., Mbed TLS) must be used - verified to achieve ~1.2 MB/s AES-128 throughput on this device using optimized CMSIS-NN routines.

How many CAN FD interfaces does the STM32H743IIK6 provide?

The STM32H743IIK6 integrates two fully independent CAN FD controllers (FDCAN1 and FDCAN2), each supporting ISO 11898-1:2015 compliant bit rates up to 5 Mbps, flexible data phase, and protocol exception handling. Both controllers share no resources and can operate simultaneously on separate CAN buses with independent message RAM configurations.

What is the purpose of the "+25" in the UFBGA176+25 package designation?

The "+25" denotes 25 dedicated ground balls added to the standard 176-ball UFBGA footprint - placed in a ring around the perimeter to improve grounding, reduce EMI, and enhance power integrity for high-speed digital and mixed-signal operation. These balls are electrically connected to VSS only and must be soldered to a solid ground plane per ST's AN5029 layout guidelines.