STM32H750VBT6 Development Board STM32H7 ARM Series MCUDev DevEBox

Specifications

• Core: STM32H750VBT6
• Microcontroller Package: LQFP100
• Operating Frequency: Up to 480 MHz
• Internal Memory: 1MB RAM, 128KB Flash (Bootloader/Critical ISRs)
• Data storage: W25Q64 (QSPI driver)
• External Storage: Onboard 8MB QSPI Flash (W25Q64) for main application code/assets
• Display Interface: RGB LCD Interface / parallel 8080 interface support, OLED interface - plug and play, support 0.96 inch / 1.3 inch OLED
• Camera Interface: DCMI (Digital Camera Interface) supported
• Connectivity: USB Type-C (Power & Data)
• ADC/DAC: 3× 16-bit ADC (up to 3.6 MSPS), 2× 12-bit DAC
• Timers: 17 Timers (including high-resolution motor control timers)
• Debug Interface: Standard SWD (Serial Wire Debug) 4-pin header
• Dimensions: Compact form factor (matches standard DevEBox footprint)

Applications

• Real-Time Digital Signal Processing (DSP): Audio equalization, FFT analysis, and vibration monitoring.
• HMI Displays: Driving high-resolution TFT screens with complex GUIs (TouchGFX/LVGL) smoothly.
• Computer Vision: Basic image recognition and processing using the DCMI interface and fast RAM.
• Industrial Automation: High-speed motor control (FOC) requiring precise timing and multiple control loops.

Features:

• 400MHz MAX clock frequency (25M Crystal on board)
• 2M Flash memory, 1M RAM
• On board W25Q64 QSPI Flash chip
• Header for TFT / Oled Display (SPI Mode)
• SWD Header on board
• SD Card Connector using SDIO Peripheral
• 24-pin Camera Connector
• 25M HS and 32.768K LS Crystals available on Board

Project Evolution

This board represents a significant leap in your engineering journey.

• The Prerequisite: You have likely maxed out the STM32F103 (Blue Pill) or STM32F401 (Black Pill) doing basic sensor logging or LED control.
• The Upgrade: The STM32H750 unlocks Hardware Double-Precision FPU capabilities. Instead of just logging data, you can now perform real-time Fourier Transforms (FFT) on audio signals or run lightweight neural networks (TinyML) directly on the edge.
• Effort Level: Advanced. Requires understanding of linker scripts (scattering file) to execute code from the external QSPI flash, as the 128KB internal flash is too small for large applications.
• Hardware Needed: ST-Link V2 or V3 is mandatory for programming.

Package Includes:

1 x STM32H750VBT6 ARM STM32H7 Minimum System Development Board 

Frequently Asked Questions (Technical FAQ)

• Why does this board only have 128KB internal flash?
  The H750 "Value Line" sacrifices internal flash size to provide the H7 core performance at a lower cost, relying on the fast onboard QSPI flash for program storage.
• How do I upload code if my program is larger than 128KB?
  You must modify your linker script (.ld file) to map the text/rodata sections to the external QSPI flash memory address (usually starting at 0x90000000).
• Does this board support MicroPython?
  Yes, MicroPython ports for STM32H7 exist, but you will need a custom build definition to handle the specific QSPI flash configuration of this board.
• Can I use the Arduino IDE with this board?
  Yes, via the STM32Duino core. Select "Generic STM32H7 Series" and ensure you choose the correct board variant with external flash support.
• Is the 480MHz clock enabled by default?
  No, the chip starts at a lower internal frequency. You must configure the PLL (Phase Locked Loop) in your initialization code to boost it to 480MHz.
• Does it have WiFi or Bluetooth?
  No, this is a pure microcontroller board. You need external modules like ESP8266 or HC-05 for wireless connectivity.
• What is the "User Key" (K1) connected to?
  The user button is typically connected to PA0 (Check specific board overlay as revisions vary), often active-low.
• Can I power this from a LiPo battery?
  Directly, no. It needs a regulated 5V (via USB) or 3.3V input. You would need an external LDO or buck converter to use a LiPo.
• Why is my code crashing immediately after startup?
  This often happens if the QSPI flash is not initialized before the CPU tries to jump to code stored there. Ensure your bootloader/startup code initializes the QSPI interface first.
• Does it support double-precision floating point math?
  Yes, the Cortex-M7 core includes a double-precision FPU (Floating Point Unit), making it excellent for high-accuracy calculations.
• How many hardware UARTs are available?
  The chip supports up to 8 UART/USARTs, but accessibility depends on which pins are broken out to the headers.
• Can I drive an RGB interface LCD directly?
  Yes, the H750 has an LTDC (LCD-TFT Display Controller) peripheral designed exactly for driving parallel RGB displays without an external controller.
• Is the USB-C port for power only?
  No, the USB-C port is connected to the MCU's USB PHY pins, allowing it to act as a USB Device (HID, CDC, MSC) or Host.
• What is the maximum SPI speed?
  The SPI interfaces on the H7 series can run at extremely high speeds (up to 100MHz+ depending on the bus), vastly faster than standard Arduinos.
• Does it include a bootloader?
  The STM32 system memory contains a built-in serial bootloader (DFU/UART). The QSPI flash requires a custom external loader if you are programming via ST-Link.
• Why is the chip getting warm?
  At 480MHz, the STM32H7 consumes significant power (hundreds of milliamps). It is normal for it to feel warm to the touch during operation.
• Can I use the SD card slot with SDIO?
  Yes, the board usually routes the SDMMC interface to the SD card slot, allowing 4-bit high-speed data transfer (much faster than SPI SD modules).
• What logic level is the Reset pin?
  The NRST pin is active low.
• Do I need an external crystal?
  The board comes with an onboard high-speed external crystal (HSE), usually 25MHz, which the PLL multiplies to reach 480MHz.
• Is this board compatible with STM32CubeMX?
  Yes, you can generate initialization code using CubeMX by selecting the STM32H750VBTx part number.