STMicroelectronics STM32H747BIT6

Overview

STM32H747BIT6 from STMicroelectronics is a dual-core 32-bit Arm® Cortex®-M7 (480 MHz) and Cortex®-M4 (240 MHz) microcontroller with 2 MB flash, 1 MB RAM (including 192 KB TCM), and integrated SMPS regulator. It supports DSI display interface, hardware JPEG codec, and dual CAN FD controllers. Used in high-performance industrial HMI and real-time motor control systems requiring deterministic M7/M4 task partitioning.

For engineers reviewing the STM32H747BIT6 datasheet, STM32H747BIT6 pinout, STM32H747BIT6 application, or STM32H747BIT6 equivalent, key selection criteria include dual-core clock domain isolation, TCM RAM allocation for time-critical routines, SMPS vs LDO supply configuration, and DSI host timing compliance for embedded display subsystems.

Technical Context

The device implements three independent power domains (D1/D2/D3) enabling selective clock gating and voltage scaling across CPU cores, peripherals, and system control logic. Its interconnect matrix comprises one AXI and two AHB bus matrices with five AHB2-APB bridges, supporting concurrent high-bandwidth data paths for DMA2D, MDMA, and Ethernet MAC.

Dual-core operation uses asymmetric architecture: Cortex-M7 executes high-throughput tasks (e.g., JPEG decode, FFT) with double-precision FPU and 32 KB L1 cache, while Cortex-M4 handles real-time I/O control (CAN FD, SDMMC, ADC acquisition) with ART Accelerator for zero-wait-state flash execution.

Key Specifications

Pinout & Package

LQFP176 package with 0.5 mm pitch, 24 × 24 mm body size, and exposed thermal pad (EP) for enhanced thermal dissipation in high-clock applications. Pin count includes 168 GPIOs with interrupt capability, multiple power/ground pairs for noise suppression, and dedicated VCAP pins for SMPS stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core Arm Cortex-M microcontroller applications.

Compared with STM32H757IIK6, STM32H747BIT6 trades cryptographic acceleration for DSI/JPEG graphics capability and LQFP176 accessibility; versus STM32H743VIT6, it adds deterministic real-time control via dedicated M4 core but increases software complexity for inter-core messaging.

Availability

STM32H747BIT6 is available at Aetrix Electronics and suitable for industrial HMI, motor control, medical imaging, and automotive camera preprocessing requiring stable component supply across multi-year production cycles.

Supply support for STM32H747BIT6 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, Switzerland, specializing in microcontrollers, power management, sensors, and automotive ICs.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, rich graphics, and energy efficiency-designed specifically for industrial automation, medical devices, and advanced human-machine interfaces.

FAQ

What power supply configurations does STM32H747BIT6 support?

The STM32H747BIT6 supports three primary supply configurations: SMPS-only (for highest efficiency), LDO-only (for lowest noise), or hybrid (SMPS for VCORE + LDO for analog). External VCAP capacitors (2.2 µF each) are mandatory for SMPS stability, and voltage scaling ranges must be selected per operating frequency to meet current limits.

How is dual-core communication implemented between Cortex-M7 and Cortex-M4?

Dual-core communication uses shared memory (SRAM D2/D3) with hardware semaphores and mailbox interrupts. The M7 and M4 each have dedicated AXI/AHB bus access to memory regions, and inter-processor interrupts (IPI) trigger event-driven synchronization without polling. ST's CMSIS-RTOS2 abstraction layer provides standardized APIs for message queues and mutexes.

Does STM32H747BIT6 support external SDRAM, and what are the timing constraints?

Yes, the Flexible Memory Controller (FMC) supports SDRAM/LPSDR up to 125 MHz clock rate with configurable burst length, CAS latency, and refresh intervals. Required setup includes precise PCB trace matching for address/control lines, termination resistors on DQ lines, and adherence to tRCD/tRP/tRC timing parameters per JEDEC specification-verified in DS12930 Section 6.3.20.

What debug interfaces are available, and can both cores be debugged simultaneously?

The device supports SWD and JTAG interfaces with 4 KB embedded trace buffer. Both Cortex-M7 and Cortex-M4 cores can be debugged simultaneously using ST-LINK/V2-1 or compatible probes, with separate debug sessions managed via ST's STM32CubeIDE. Core-specific breakpoints, register views, and trace data are accessible without cross-core interference.