STMicroelectronics STM32H742AII6

Overview

STM32H742AII6 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/DSP instructions. It delivers 1027 DMIPS performance and supports real-time deterministic execution in industrial motor control, high-resolution HMI, and edge AI inference at the device level.

For engineers reviewing the STM32H742AII6 datasheet, STM32H742AII6 pinout, STM32H742AII6 application, or STM32H742AII6 equivalent, key selection criteria include its triple-domain power architecture (D1/D2/D3), hardware JPEG codec, dual CAN FD interfaces, and 16-bit ADC with 3.6 MSPS sampling - all critical for safety-aware embedded systems requiring concurrent high-speed analog acquisition, graphics rendering, and secure connectivity.

Technical Context

The STM32H742AII6 implements a three-bus interconnect matrix (1 AXI + 2 AHB) with five AHB2-APB bridges and two AXI2-AHB bridges, enabling concurrent high-bandwidth data movement between CPU, DMA controllers (MDMA, dual-port DMAs), and peripherals. Its memory subsystem includes separate ITCM (64 KB) and DTCM (128 KB) for time-critical code/data, plus up to 864 KB user SRAM and Quad-SPI interface running at 133 MHz.

Clock management uses three PLLs - one system PLL with fractional mode, plus two kernel PLLs - feeding independent domains; reset/power control supports six voltage scaling ranges in Run/Stop modes, 2.95 µA Standby current (RTC/LSE active), and dedicated USB 3.3 V regulator for PHY operation without external LDO.

Key Specifications

Pinout & Package

STM32H742AII6 is housed in a TFBGA100 package (8 × 8 mm, 0.8 mm pitch), optimized for space-constrained industrial and automotive control applications requiring high I/O density and thermal efficiency. The package supports 168 GPIOs with interrupt capability, multiple alternate functions per pin, and robust ESD protection (±4 kV HBM).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H743AII6, the STM32H742AII6 omits FMC and one ADC but retains identical performance, graphics, and connectivity - making it optimal for self-contained applications without external memory. Versus STM32H753AII6, it lacks hardware crypto engines, reducing BOM cost where security is handled externally or at software layer.

Availability

STM32H742AII6 is available at Aetrix Electronics and suitable for industrial motor control, medical imaging edge nodes, smart building HMIs, and automotive ADAS sensor fusion hubs requiring stable component supply across long-life production cycles.

Supply support for STM32H742AII6 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, rich peripheral integration, and energy efficiency - especially where concurrent processing, graphics, and connectivity converge in resource-constrained environments.

FAQ

What is the maximum operating frequency and associated performance metric of the STM32H742AII6?

The STM32H742AII6 operates at up to 480 MHz with an Arm Cortex-M7 core, achieving 1027 DMIPS (Dhrystone 2.1) and 2.14 DMIPS/MHz. This performance is sustained under full cache and FPU utilization, validated across temperature and voltage ranges per DS12110 Rev 11 Section 6.3.1.

Does the STM32H742AII6 support hardware-accelerated cryptography?

No - the STM32H742AII6 does not integrate AES, HASH, or PKA cryptographic accelerators. Those features are present in the STM32H753 and STM32H750 lines. Security relies on software libraries or external secure elements; ROP and PC-ROP are supported for basic code protection.

How many independent ADC instances does the STM32H742AII6 provide, and what is their maximum combined sampling rate?

The device integrates three independent 16-bit ADCs, each supporting up to 36 input channels. When operated in interleaved mode with shared clocking, they achieve a combined sampling rate of 3.6 MSPS across all channels, as specified in DS12110 Section 6.3.20.

What debug interfaces are supported, and is SWD sufficient for full development access?

The STM32H742AII6 supports both SWD and JTAG interfaces via PA13/PA14 (SWDIO/SWCLK) and four additional pins for JTAG. SWD alone provides full debug, programming, and trace capability including 4 KB embedded trace buffer (ETB), eliminating need for JTAG unless legacy toolchain compatibility is required.