New STM32H5 lines give developers more room to scale
Build with the memory and features your design needs
Designing secure, connected systems often means balancing performance, memory, integration, and cost.
With the latest STM32H5 lines, you can now scale within the same platform, from a compact 1 Mbyte device to higher-memory MCUs for graphics-rich and feature-heavy designs.
Built on the Arm Cortex-M33 running up to 250 MHz, STM32H543/553 and STM32H5Ex/Fx devices scale from 1 Mbyte to 4 Mbytes of flash, enabling a consistent platform for secure, connected, and graphics-enabled embedded applications.
STM32H543/553: a compact option for secure embedded designs
The new STM32H543/553 line are designed for developers who need strong security, rich connectivity, and efficient memory use in a more compact device.
Key features:
- Build secure embedded applications in a smaller memory footprint with 1 Mbyte of flash and 304 Kbytes of RAM
- Start from a stronger security foundation with TrustZone, secure boot, authenticated debug, tamper protection, and a broad crypto set including AES, SAES, SHA-1/2/3, RSA, ECC, TRNG, HUK, and OTFDEC
- Integrate more without adding extra components thanks to Ethernet, FD-CAN, USB FS/UCPD, I²C, I3C, SPI, UART/USART, OctoSPI, SDMMC, FMC, ADC, and COMP
- Add custom control on chip with PLAY for logic, state machines, and application-specific behavior
STM32H5Ex/Fx: more memory and more graphics headroom
If your design needs larger code space, more SRAM, or advanced graphics support, the STM32H5Ex/Fx lines extend the family with more room to build.
Key features:
- Up to 4 Mbytes of flash and 1.5 Mbytes of SRAM, giving you more headroom for complex software, graphics assets, and feature-rich applications
- Flash partitioning for both code and graphics assets
- Three ADCs and three FDCAN interfaces, supporting industrial‑grade analog signal acquisition
- USB FS and USB HS with embedded PHY
- PLAY for fast custom logic and deterministic control
- High on‑chip integration to reduce external components and simplify overall design
The STM32H5Ex/Fx lines also introduce the first STM32 MCU with the ChromART2 accelerator. For developers building embedded GUIs, this means:
- Smoother rendering
- More fluid animations
- Support for larger and sharper displays
- Higher resolutions when paired with external memory
- Hardware-accelerated rotation, scaling, and command lists to simplify advanced UI effects and reduce CPU load
- MJPEG decoding to simplify multimedia playback
Robust, ready to‑to‑use security
Security is deeply integrated with:
- STM32Trust TEE and hardware accelerators (AES, HASH, PKA, OTFDEC)
- STiRoT secure boot
- Coupling and chaining bridge (CCB) to securely transmit keys
- Target PSA Certified Level 3 and SESIP3 certification
These features help developers meet rising cybersecurity demands without complex design work.
Whether you choose 1 Mbyte or 4 Mbytes of flash, STM32H5 delivers TrustZone, STiRoT, Secure boot, advanced crypto, and rich peripherals, making the family a strong fit for industrial, connected, and high-end embedded systems.
Availability
- STM32H5Ex/Fx lines (STM32H5E5/5F5 - STMicroelectronics) with associated Nucleo board (NUCLEO-H5E5ZJ) and discovery kit (STM32H5F5J-DK)
- STM32H543/553 lines (STM32H543/H553 - STMicroelectronics) with this nucleo board (NUCLEO-H553ZG)
Available at distribution later this year - Contact your ST sales office for samples.
First published on July 09, 2026
