STMicroelectronics STM32H7B3I-DK

Overview

STM32H7B3I-DK from STMicroelectronics is a Discovery kit development board centered on the STM32H7B3LIH6Q Arm® Cortex®-M7 microcontroller (2 MB Flash, 1.4 MB RAM, BGA225), featuring a 4.3" 480×272 RGB LCD with capacitive touch, Wi-Fi® 802.11 b/g/n module, CAN FD interface, Octo-SPI NOR flash, and SDRAM - used for rapid prototyping of high-performance embedded applications including industrial HMI and connected edge devices.

For engineers reviewing the STM32H7B3I-DK datasheet, STM32H7B3I-DK pinout, STM32H7B3I-DK application, or STM32H7B3I-DK equivalent, this board serves as a fully integrated reference platform supporting USB OTG HS, audio codec, camera interface, microSD™, ARDUINO® Uno V3 and STMod+ expansion, and on-board ST-LINK-V3E debugger with mass storage and Virtual COM port functionality.

Technical Context

The STM32H7B3I-DK implements a dual-board architecture: main board (MB1332) hosting the STM32H7B3LIH6Q MCU, LCD board (MB1315), fanout board (MB1280), and Wi-Fi® module (MB1486). It enables full peripheral evaluation including RGB LCD timing control, Octo-SPI memory mapping, SDRAM initialization sequences, and CAN FD bit-rate configuration up to 5 Mbps.

ST-LINK-V3E is embedded as a dedicated debug/programming subsystem with independent USB enumeration, supporting simultaneous debug, virtual COM port, and mass storage modes without host driver conflicts. Power routing supports flexible sourcing via USB VBUS, external supply, or ST-LINK USB, with hardware-level isolation between target and debugger domains.

Key Specifications

Availability

STM32H7B3I-DK is available at Aetrix Electronics and suitable for industrial HMI development, edge AI inference prototyping, wireless gateway validation, and real-time motor control system design requiring stable component supply and full ecosystem support.

Supply support for STM32H7B3I-DK 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 analog components for industrial, automotive, and consumer markets.

The STM32 Discovery kit product line delivers validated, out-of-box-ready evaluation platforms targeting rapid firmware development, peripheral interoperability testing, and reference design reuse across Cortex-M-based applications.

FAQ

Does the STM32H7B3I-DK support external SDRAM operation at full speed?

Yes - the board integrates a 128-Mbit SDRAM (IS42S16160J-6BLI) wired for 16-bit data bus and 120 MHz clock, matching the STM32H7B3LIH6Q FMC controller's maximum SDRAM timing specifications. Initialization is handled by HAL drivers in STM32CubeH7, with example projects demonstrating burst reads/writes and framebuffer allocation.

Can the on-board Wi-Fi® module be used with TLS 1.2 for secure MQTT communication?

Yes - the Wi-Fi® module (based on SPWF04SA) supports TLS 1.2 via ST's X-CUBE-WIFI1 middleware stack. Example projects in STM32CubeH7 demonstrate mutual authentication with AWS IoT Core using client certificates stored in internal flash or external Octo-SPI memory.

Is the RGB LCD interface configured for active-high or active-low pixel clock polarity?

The LCD uses active-high pixel clock (LCD_CLK) and active-high data enable (LCD_DE), aligned with standard RGB timing mode 0. The LTDC peripheral is preconfigured in the demonstration firmware for 272-line vertical resolution, 480-pixel horizontal resolution, and 16-bit RGB565 format with no external level-shifting required.

What debug probe firmware version ships with the ST-LINK-V3E on STM32H7B3I-DK?

The board ships with ST-LINK/V3 firmware v3.J37.M3, supporting SWD/JTAG, USB CDC ACM (Virtual COM port), and MSC (mass storage) simultaneously. Firmware updates are performed via STM32CubeProgrammer or STSW-LINK007, and the probe enumerates as three distinct USB interfaces without requiring manual driver installation on Windows 10/11 or Linux.