This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

ST STM32H750B Discovery Kit


The STM32H750B-DK Discovery kit is a complete demonstration and development platform for Arm® Cortex®-M7 core-based STM32H750XBH6 microcontroller, with 128Kbytes of Flash memory and 1 Mbytes of SRAM.

The STM32H750B-DK Discovery kit is used as a reference design for user application development before porting to the final product, thus simplifying the application development.

The full range of hardware features available on the board helps users to enhance their application development by an evaluation of all the peripherals (such as USB OTG FS, Ethernet, microSD™ card, USART, CAN FD, SAI audio DAC stereo with audio jack input and output, MEMS digital microphone, HyperRAM™, Octo-SPI Flash memory, RGB interface LCD with capacitive touch panel, and others). ARDUINO® Uno V3, Pmod™ and STMod+ connectors provide easy connection to extension shields or daughterboards for specific applications.

STLINK-V3E is integrated into the board, as the embedded in-circuit debugger and programmer for the STM32 MCU and USB Virtual COM port bridge. STM32H750B-DK board comes with the STM32CubeH7 MCU Package, which provides an STM32 comprehensive software HAL library as well as various software examples.


More information about the board can be found at the STM32H750B-DK website. More information about STM32H750 can be found here:

Supported Features

The current Zephyr stm32h750b_dk board configuration supports the following hardware features:






nested vector interrupt controller



serial port-polling; serial port-interrupt







Other hardware features are not yet supported on Zephyr porting.

The default configuration per core can be found in the defconfig file: boards/arm/stm32h750b_dk/stm32h750b_dk_defconfig

Pin Mapping

For more details please refer to STM32H750B-DK website.

Default Zephyr Peripheral Mapping:

  • UART_3 TX/RX : PB10/PB11 (ST-Link Virtual Port Com)

  • LD1 : PJ2

  • LD2 : PI13

System Clock

The STM32H750B System Clock can be driven by an internal or external oscillator, as well as by the main PLL clock. By default, the System clock is driven by the PLL clock at 480MHz. PLL clock is feed by a 25MHz high speed external clock.

Serial Port

The STM32H750B Discovery kit has up to 6 UARTs. The Zephyr console output is assigned to UART3 which connected to the onboard ST-LINK/V3.0. Virtual COM port interface. Default communication settings are 115200 8N1.

Programming and Debugging

See Building an Application for more information about application builds.


Connect the STM32H750B-DK to your host computer using the ST-LINK USB port, then run a serial host program to connect with the board. For example:

$ minicom -b 115200 -D /dev/ttyACM0

You can then build and flash applications in the usual way. Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b stm32h750b_dk samples/hello_world
west flash

You should see the following message in the serial host program:

$ Hello World! stm32h750b_dk


You can debug an application in the usual way. Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b stm32h750b_dk samples/hello_world
west debug