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 list at the bottom of the left panel and select the desired version.

ST STM32H573I-DK Discovery


The STM32H573I-DK Discovery kit is designed as a complete demonstration and development platform for STMicroelectronics Arm® Cortex®-M33 core-based STM32H573IIK3Q microcontroller with TrustZone®. Here are some highlights of the STM32H573I-DK Discovery board:

  • STM32H573IIK3Q microcontroller featuring 2 Mbytes of Flash memory and 640 Kbytes of SRAM in 176-pin BGA package

  • 1.54-inch 240x240 pixels TFT-LCD with LED backlight and touch panel

  • USB Type-C™ Host and device with USB power-delivery controller

  • SAI Audio DAC stereo with one audio jacks for input/output,

  • ST MEMS digital microphone with PDM interface

  • Octo-SPI interface connected to 512Mbit Octo-SPI NORFlash memory device (MX25LM51245GXDI00 from MACRONIX)

  • 10/100-Mbit Ethernet,

  • microSD™

  • A Wi‑Fi® add-on board

  • Board connectors

    • STMod+ expansion connector with fan-out expansion board for Wi‑Fi®, Grove and mikroBUS™ compatible connectors

    • Pmod™ expansion connector

    • Audio MEMS daughterboard expansion connector

    • ARDUINO® Uno V3 expansion connector

  • Flexible power-supply options

    • ST-LINK

    • USB VBUS

    • external sources

  • On-board STLINK-V3E debugger/programmer with USB re-enumeration capability:

    • mass storage

    • Virtual COM port

    • debug port

  • 4 user LEDs

  • User and reset push-buttons

STM32H573I-DK Discovery

More information about the board can be found at the STM32H573I-DK Discovery website.


The STM32H573xx devices are an high-performance microcontrollers family (STM32H5 Series) based on the high-performance Arm® Cortex®-M33 32-bit RISC core. They operate at a frequency of up to 250 MHz.

  • Core: ARM® 32-bit Cortex® -M33 CPU with TrustZone® and FPU.

  • Performance benchmark:

    • 375 DMPIS/MHz (Dhrystone 2.1)

  • Security

    • Arm® TrustZone® with ARMv8-M mainline security extension

    • Up to 8 configurable SAU regions

    • TrustZone® aware and securable peripherals

    • Flexible lifecycle scheme with secure debug authentication

    • Preconfigured immutable root of trust (ST-iROT)

    • SFI (secure firmware installation)

    • Secure data storage with hardware unique key (HUK)

    • Secure firmware upgrade support with TF-M

    • 2x AES coprocessors including one with DPA resistance

    • Public key accelerator, DPA resistant

    • On-the-fly decryption of Octo-SPI external memories

    • HASH hardware accelerator

    • True random number generator, NIST SP800-90B compliant

    • 96-bit unique ID

    • Active tampers

    • True Random Number Generator (RNG) NIST SP800-90B compliant

  • Clock management:

    • 25 MHz crystal oscillator (HSE)

    • 32 kHz crystal oscillator for RTC (LSE)

    • Internal 64 MHz (HSI) trimmable by software

    • Internal low-power 32 kHz RC (LSI)( ±5%)

    • Internal 4 MHz oscillator (CSI), trimmable by software

    • Internal 48 MHz (HSI48) with recovery system

    • 3 PLLs for system clock, USB, audio, ADC

  • Power management

    • Embedded regulator (LDO) with three configurable range output to supply the digital circuitry

    • Embedded SMPS step-down converter

  • RTC with HW calendar, alarms and calibration

  • Up to 139 fast I/Os, most 5 V-tolerant, up to 10 I/Os with independent supply down to 1.08 V

  • Up to 16 timers and 2 watchdogs

    • 12x 16-bit

    • 2x 32-bit timers with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input

    • 6x 16-bit low-power 16-bit timers (available in Stop mode)

    • 2x watchdogs

    • 2x SysTick timer

  • Memories

    • Up to 2 MB Flash, 2 banks read-while-write

    • 1 Kbyte OTP (one-time programmable)

    • 640 KB of SRAM including 64 KB with hardware parity check and 320 Kbytes with flexible ECC

    • 4 Kbytes of backup SRAM available in the lowest power modes

    • Flexible external memory controller with up to 16-bit data bus: SRAM, PSRAM, FRAM, SDRAM/LPSDR SDRAM, NOR/NAND memories

    • 1x OCTOSPI memory interface with on-the-fly decryption and support for serial PSRAM/NAND/NOR, Hyper RAM/Flash frame formats

    • 2x SD/SDIO/MMC interfaces

  • Rich analog peripherals (independent supply)

    • 2x 12-bit ADC with up to 5 MSPS in 12-bit

    • 2x 12-bit D/A converters

    • 1x Digital temperature sensor

  • 34x communication interfaces

    • 1x USB Type-C / USB power-delivery controller

    • 1x USB 2.0 full-speed host and device

    • 4x I2C FM+ interfaces (SMBus/PMBus)

    • 1x I3C interface

    • 12x U(S)ARTS (ISO7816 interface, LIN, IrDA, modem control)

    • 1x LP UART

    • 6x SPIs including 3 muxed with full-duplex I2S

    • 5x additional SPI from 5x USART when configured in Synchronous mode

    • 2x SAI

    • 2x FDCAN

    • 1x SDMMC interface

    • 2x 16 channel DMA controllers

    • 1x 8- to 14- bit camera interface

    • 1x HDMI-CEC

    • 1x Ethernel MAC interface with DMA controller

    • 1x 16-bit parallel slave synchronous-interface

  • CORDIC for trigonometric functions acceleration

  • FMAC (filter mathematical accelerator)

  • CRC calculation unit

  • Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™

More information about STM32H573 can be found here:

Supported Features

The Zephyr STM32H573I_DK board configuration supports the following hardware features:






reset and clock control






nested vector interrupt controller






True Random number generator



serial port-polling; serial port-interrupt



independent watchdog



DAC Controller



ADC Controller






Real Time Clock



i2c bus



spi bus






can bus






disk access



USB full-speed host/device bus




Other hardware features are not yet supported on this Zephyr port.

The default configuration can be found in the defconfig and dts files:

Connections and IOs

STM32H573I-DK Discovery Board has 9 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.

For more details please refer to STM32H573I-DK Discovery board User Manual.

Default Zephyr Peripheral Mapping:

  • USART_1 TX/RX : PA9/PA10 (VCP)

  • USART_3 TX/RX : PB11/PB10 (Arduino USART3)

  • USER_PB : PC13

  • LD1 (green) : PI9

  • DAC1 channel 1 output : PA4

  • ADC1 channel 6 input : PF12

System Clock

STM32H573I-DK System Clock could be driven by internal or external oscillator, as well as main PLL clock. By default System clock is driven by PLL clock at 240MHz, driven by 25MHz external oscillator (HSE).

Serial Port

STM32H573I-DK Discovery board has 3 U(S)ARTs. The Zephyr console output is assigned to USART1. Default settings are 115200 8N1.

Programming and Debugging

Applications for the stm32h573i_dk board configuration can be built and flashed in the usual way (see Building an Application and Run an Application for more details).


STM32H573I-DK Discovery board includes an ST-LINK/V3E embedded debug tool interface. Support is available on STM32CubeProgrammer V2.13.0.

Alternatively, this interface will be supported by a next openocd version.

Flashing an application to STM32H573I-DK Discovery

Connect the STM32H573I-DK Discovery to your host computer using the USB port. Then build and flash an application. Here is an example for the Hello World application.

Run a serial host program to connect with your Nucleo board:

$ minicom -D /dev/ttyACM0

Then build and flash the application.

# From the root of the zephyr repository
west build -b stm32h573i_dk samples/hello_world
west flash

You should see the following message on the console:

Hello World! stm32h573i_dk


Waiting for openocd support, debugging could be performed with pyocd which requires to enable “pack” support with the following pyocd command:

$ pyocd pack --update
$ pyocd pack --install stm32h5

Once installed, 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 stm32h573i_dk samples/hello_world
west debug