Блог компании ST STM32V873VI High-performance MCU Built On 18nm FD-SOI Process With Arm Cortex-M85 Core

Shenzhen Mingjiada Electronics Co., Ltd. supplies and recycles the ST STM32V873VI, a high-performance MCU based on the 18nm FD-SOI process and featuring an Arm Cortex-M85 core.

The STM32V873VI is the flagship microcontroller in the STM32V8 series and is one of the world’s first general-purpose, high-performance MCUs manufactured using the advanced 18nm FD-SOI (Fully Depleted Silicon-on-Insulator) process. It features an 800MHz Arm Cortex-M85 processor core, incorporating Helium (MVE) vector extensions, embedded PCM (phase-change memory), a hardware security architecture and a rich set of high-speed peripherals. Designed for high-computational-power, high-reliability embedded applications such as edge AI, industrial automation, humanoid robotics and high-end human-machine interaction, it redefines the standards for computational power, energy efficiency and robustness in high-performance real-time MCUs.

I. Core Process: 18nm FD-SOI – An epoch-making technological foundation in the MCU sector

The STM32V873VI is based on STMicroelectronics’ mature 18nm UTBB FD-SOI manufacturing process. Unlike traditional bulk silicon processes, it utilises a buried oxide layer to isolate the transistor channel, delivering multiple advantages:

Ultra-low leakage current and excellent energy efficiency: With enhanced static control of transistors, static power consumption is significantly reduced; controllable power consumption is maintained even when operating at high frequencies of 800 MHz, balancing peak computing power with sustained operational energy efficiency;

Enhanced environmental resilience: Supports a maximum junction temperature of 140°C, with an operating temperature range spanning -40°C to +125°C. It exhibits outstanding resistance to thermal drift and radiation, making it suitable for highly demanding environments such as high-temperature industrial control cabinets, outdoor smart terminals and aerospace applications;

Frequency ceiling breakthrough: The advanced process enables the core to run stably at 800MHz, delivering higher sustained computing performance within the same architecture;

Mixed-signal compatibility: FD-SOI is inherently suited to digital and analogue integration, ensuring the stable operation of high-speed communication and high-precision analogue peripherals.

The chip is paired with ST’s proprietary PCM (Phase-Change Memory), moving away from traditional Flash architectures. The STM32V873VI incorporates 2MB of PCM, supporting in-place rapid overwriting without the need for block-level erasure. It offers a read/write cycle life of up to 10⁸ cycles and data retention exceeding 10 years, whilst featuring hardware ECC (Error Correction Code) to significantly enhance stability in applications involving log storage and frequent parameter updates.

II. Computing Core: 800MHz Arm Cortex‑M85 with Helium Vector Extensions

The chip’s core utilises the current performance leader in the Cortex‑M product line — the Arm Cortex‑M85 (Armv8.1‑M architecture):

With a maximum clock speed of 800 MHz, it achieves a CoreMark score of up to 5,072 in real-world testing, representing an approximate 40% improvement in scalar performance compared to the STM32H7 (Cortex‑M7);

Native integration of the Helium M-Profile Vector Extensions (MVE) provides hardware acceleration for DSP filtering, FFT operations and edge machine learning inference, delivering up to a six-fold increase in AI and signal processing throughput compared to previous-generation MCUs;

Integrated hardware double-precision FPU, DSP instruction set, MPU memory protection unit and ETM real-time tracing unit;

Built-in TrustZone for Armv8-M hardware security isolation, combined with the PACBTI pointer authentication extension, separates the secure and non-secure worlds, laying a solid foundation for trusted device boot and key storage.

Memory architecture configuration:

1.5 MB high-capacity SRAM, with ECC error correction support for critical storage areas;

192 KB zero-wait TCM (Tightly Coupled Memory) to ensure latency-free data access for real-time control and AI inference tasks;

Separate I-Cache and D-Cache, significantly reducing bus access latency.

III. Peripheral Resources: Integrated High-Speed Interconnect, Multimedia and Real-Time Control

The STM32V873VI peripheral matrix is deeply optimised for industrial internet of things (IIoT), vision-based human-machine interfaces and multi-axis motor control:

Communication Interfaces

1 Gbps Gigabit Ethernet (with integrated PHY, supporting TSN – Time-Sensitive Networking), meeting the requirements of industrial real-time Ethernet and multi-device collaborative communication in robotics;

Dual USB 2.0 High-Speed + Full-Speed PHYs, supporting USB-PD;

Multiple FDCAN, I³C, I²C, SPI, high-speed xSPI and UART/LPUART interfaces, suitable for remote networking of sensors and servo drives;

Multimedia and Human-Machine Interface

Chrom-ART 2D graphics accelerator, hardware JPEG codec, TFT-LCD controller and parallel camera interface, capable of driving high-end HMI displays and enabling local image acquisition and pre-processing;

Analogue and Real-time Control

Multiple 12-bit high-speed ADCs, DACs and analogue comparators;

Advanced timer array, supporting multi-channel PWM output, suitable for multi-axis servo and BLDC brushless motor control;

HPDMA/GPDMA multi-level DMA controllers, enabling zero-CPU data transfer between peripherals and memory;

Package type: LQFP100 (standard package with ‘VI’ suffix), balancing the number of I/O pins with PCB routing complexity to facilitate hardware iterations in end products.

IV. Multi-layered Hardware Security Capabilities

The chip natively integrates a complete security subsystem, designed to support PSA Certified Level 3 and SESIP3 security certifications:

TrustZone hardware-isolated security domain;

SAES hardware cryptographic accelerator (supporting AES, SHA, ECC and other national and international mainstream algorithms);

Secure OTP (One-Time Programmable) memory and tamper-detection module;

Secure boot, firmware encryption and secure firmware update (SFI) to prevent firmware tampering and unauthorised cloning.

V. Typical Application Areas

Industrial automation: high-end motion controllers, multi-axis servo controllers, TSN industrial gateways, intelligent vision inspection units;

Humanoid robots / mobile robots: real-time joint control, local AI perception and computation, multi-sensor fusion processing;

High-end human-machine interface (HMI): industrial touchscreen terminals, smart panels, local image recognition devices;

Smart Energy Equipment: High-power converters, energy storage control systems, high-precision energy monitoring units;

High-Reliability Specialised Equipment: Aerospace payloads, outdoor edge gateways, high-end medical monitoring equipment;

In-Vehicle Edge Control Units: Non-safety-domain intelligent sensing, in-vehicle gateways, in-vehicle HMIs.

VI. Summary of Key Product Highlights

Leading-edge process technology: 18nm FD-SOI, offering high heat resistance, low leakage current and excellent resistance to environmental interference

Top-tier computing power: 800MHz Cortex-M85 + Helium vector extension, balancing real-time control with edge AI inference

Innovative memory: 2MB PCM phase-change memory, with high erase/write endurance and support for frequent online parameter updates

High-Speed Interconnectivity: Integrated TSN Gigabit Ethernet, high-speed USB, FDCAN and I³C next-generation industrial buses

Native Hardware Security: TrustZone + hardware encryption, meeting high-level IoT and industrial security standards

Mature Ecosystem: Fully compatible with the STM32Cube development environment and STM32Sidekick AI toolchain, enabling rapid porting of existing STM32 software

The STM32V873VI overcomes the traditional bottleneck in high-performance MCUs, where ‘increased computing power is accompanied by a sharp rise in power consumption and thermal stress’. Leveraging the combination of the 18 nm FD-SOI process and the Cortex-M85 core, it is the preferred device for a single-chip integrated solution enabling real-time motion control, signal processing, local AI inference, high-speed networking and graphics display.