STMicroelectronics STM32H742VIH6

Overview

STM32H742VIH6 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), and dual-domain power architecture (D1/D2/D3). It integrates dual CAN FD controllers, Ethernet MAC, LCD-TFT controller, hardware JPEG codec, and 3× 16-bit ADCs (3.6 MSPS), deployed in industrial HMI, motor control gateways, and real-time vision edge nodes.

For engineers reviewing the STM32H742VIH6 datasheet, STM32H742VIH6 pinout, STM32H742VIH6 application, or STM32H742VIH6 equivalent, key selection criteria include dual-domain voltage scaling (6 ranges), 100-pin LQFP package with 86 I/Os, 2.95 µA Standby current (RTC/LSE ON), and FDCAN/ETH/DCMI interface coexistence for deterministic multi-peripheral systems.

Technical Context

The STM32H742VIH6 implements a triple-bus matrix interconnect (1 AXI + 2 AHB) with 5 AHB2-APB bridges and 2 AXI2-AHB bridges, enabling concurrent high-bandwidth peripheral access without CPU arbitration bottlenecks. Its memory subsystem includes separate ITCM (64 KB) and DTCM (128 KB) for time-critical code/data, plus 864 KB user SRAM and dual-mode Quad-SPI supporting 133 MHz XIP operation.

Power management uses three independent domains: D1 (Cortex-M7 core, GPU, LTDC), D2 (peripherals including FDCAN, ETH, SDMMC), and D3 (reset/clock/power control), each with configurable clock gating and voltage scaling. The device supports true low-power modes-Standby with VBAT backup, Stop with RTC wake-up, and Sleep with full register retention-verified at 2.95 µA (Backup SRAM OFF, RTC/LSE ON).

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; 86 user-configurable GPIOs, 14 power/ground pins (VDD/VSS/VDDA/VSSA/VCAP), and dedicated debug (SWD/JTAG), reset (NRST), and boot configuration pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H743VIH6, the STM32H742VIH6 reduces analog peripheral count without sacrificing core performance, flash, or connectivity-making it optimal for display-centric or communication-dense applications where ADC/DAC headroom is not critical. Against i.MX RT1176DVMAA, it delivers lower system complexity via integrated flash and native vision/display interfaces, at the expense of dual-core flexibility.

Availability

STM32H742VIH6 is available at Aetrix Electronics and suitable for industrial HMI, motor control gateways, smart vision sensors, and secure IoT gateways requiring stable component supply across multi-year production cycles.

Supply support for STM32H742VIH6 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 management ICs, sensors, and automotive-grade components.

The STM32H7 series targets high-end real-time embedded applications demanding both computational throughput and deterministic peripheral response-specifically industrial automation, advanced human-machine interfaces, and edge AI vision systems.

FAQ

What is the maximum operating frequency and core type of the STM32H742VIH6?

The STM32H742VIH6 features an Arm Cortex-M7 core rated for up to 480 MHz operation, validated with double-precision floating-point unit, 16 KB instruction cache, and 16 KB data cache. Its 1027 DMIPS performance (2.14 DMIPS/MHz) is measured under Dhrystone 2.1 benchmark conditions with cache enabled and optimized compiler settings.

Does the STM32H742VIH6 support external SDRAM, and what are the timing constraints?

Yes, the STM32H742VIH6 supports external SDRAM via its Flexible Memory Controller (FMC) with synchronous mode up to 100 MHz. It supports standard x16 SDRAM parts (e.g., IS42S16160J) with programmable CAS latency, burst length, and refresh timing; setup/hold requirements are defined in Section 6.3.17 of DS12110 Rev 11.

How many I/O pins are available in the LQFP100 package, and what is their voltage tolerance?

The STM32H742VIH6 in LQFP100 provides 86 general-purpose I/O pins, all 5 V-tolerant when configured as inputs (except analog pins and JTAG/SWD). Each GPIO supports interrupt generation, configurable pull-up/pull-down, and alternate functions mapped across 18 AF selection registers per port.

What low-power modes are supported, and what is the lowest achievable current draw?

The STM32H742VIH6 supports Sleep, Stop, Standby, and VBAT modes. In Standby mode with Backup SRAM disabled and RTC + LSE active, it achieves 2.95 µA typical current consumption (measured per Section 6.3.7 of DS12110 Rev 11), making it suitable for battery-backed applications requiring long-term calendar functionality.