Nuvoton Technology Launches NuMicro® M5531 Series Microcontrollers: Delivering High-Performance Computing and Exceptional Security Protection

Ideal for Connected Devices, Industrial Automation, Smart Building, and HMI Applications

Hsinchu, Taiwan – November 12, 2025 – Nuvoton Technology today announced the launch of its NuMicro® M5531 series microcontrollers, powerful MCUs designed to deliver advanced digital signal processing performance. Based on the Arm® Cortex®-M55 processor, the M5531 series runs at speeds up to 220 MHz, delivering up to 371 DMIPS of computing performance. It also features excellent noise immunity, passing 3 kV ESD HBM and 4.4 kV EFT tests, providing users with stable and high-speed system performance.

Outstanding Computing Resources and Architectural Advantages

The M5531 series offers rich computing resources, making it an ideal choice for performance-intensive embedded applications such as real-time signal processing and high-performance control systems. Key features include:

● High-performance architecture: Built on a 64-bit AXI bus architecture, it provides high bandwidth and supports synchronous data read/write operations, reducing sequential latency and improving overall system efficiency. In addition, it provides CPU-dedicated Tightly Coupled Memory (TCM), including 64 KB I-TCM and 128 KB D-TCM, for running time-critical instructions and data.

● Hardware accelerators: Integrated Helium™ M-profile vector extension, double-precision floating-point unit (FPU), GDMA graphics accelerator, and a hardware cryptographic engine.

● Memory integration: Featuring up to 1.5 MB of SRAM and 2 MB of Flash memory on-chip, the M5531 series can operate independently in most applications without external SDRAM, simplifying system design and reducing overall cost.

Comprehensive Security Features Designed to Meet PSA Level 2 Requirements

Recognizing the growing demand for enhanced product security, the M5531 series integrates multiple hardware-based security mechanisms to strengthen system integrity and protection. These include Arm TrustZone®, Secure Boot, cryptographic engines (AES-256, ECC-571, RSA-4096, SHA-512, HMAC-512), Key Store, Key Derivation Function, True Random Number Generator (TRNG), eXecute-Only-Memory, One-Time Programmable Memory (OTP), and tamper detection pins.

Rich Peripheral Integration and Low Power Consumption

The M5531 series provides a wide range of peripheral interfaces to support complex system designs:

● High-speed communication: 10/100 Ethernet MAC (with RMII interface), 2 sets of CAN FD interfaces, and 1 set of I3C interface (up to 25 Mbps)

● USB interfaces: 1 set of USB 2.0 High-Speed OTG/Host/Device and 1 set of USB 2.0 Full-Speed OTG/Host/Device

● Versatile interfaces: Up to 15 sets of UARTs, 6 sets of SPI/I²S, 6 sets of I²C, 1 set of USCI (configurable as UART/SPI/I²C), 2 sets of QSPI, 2 sets of SDIO, 1 set of CCAP, 4-channel PDM microphone interface controller (DMIC), and 1 set of PSIO interface

● Analog and PWM control: 2 sets of 12-bit SAR ADCs (up to 48 channels), 2 sets of 12-bit 1 Msps DACs, 4 analog comparators, and up to 24 channels of PWM output

In terms of power efficiency, the M5531 series delivers impressive performance with a dynamic power consumption as low as 94.5 µA/MHz. It also offers multiple low-power peripherals such as LPSRAM, LPPDMA, LPTimer, and 12-bit LPADC, allowing the system to maintain essential functions in low-power modes.

Complete Development Resources and Software Support

To help developers fully leverage the capabilities of the M5531 series, Nuvoton provides a comprehensive development ecosystem. The M5531 series supports multiple real-time operating systems (RTOS), including FreeRTOS, Zephyr, and RT-Thread, along with extensive drivers and example projects to accelerate development. For HMI and display applications, it also supports popular GUI libraries such as emWin, LVGL, and Qt for MCUs, enabling developers to build smooth and visually appealing interfaces efficiently.

Application Fields

The M5531 series is suitable for a wide range of industrial, consumer, and connected products, including:

● Industrial IoT (e.g., industrial gateways, communication modules)

● Industrial automation (e.g., PLC protocol converters)

● Smart building systems (e.g., fire alarm systems, LED advertising display)

● HMI applications (e.g., smart thermostats)

● Sensor fusion (e.g., environmental data collectors)

The NuMicro® M5531 series is available in LQFP176 (24 x 24 mm), LQFP128 (14 x 14 mm), and LQFP64 (10 x 10 mm) packages.

For more information about the NuMicro® M5531 series, please visit: https://www.nuvoton.com/products/microcontrollers/arm-cortex-m55-mcus/m5531-series/

Nuvoton has also released the NuMaker-M5531 development board for the M5531 series: https://direct.nuvoton.com/tw/numaker-m5531?srsltid=AfmBOorPUAxFVW8m697F_y_Q3cYPY_rwVNJdoNz0sJY6uSXQJWyteHMy

About Nuvoton Technology

Nuvoton Technology Corporation (Nuvoton) was founded to bring innovative semiconductor solutions to the market. Nuvoton was spun-off as a Winbond Electronics affiliate in July 2008 and went public in September 2010 on the Taiwan Stock Exchange (TWSE). Nuvoton focuses on the developments of microcontroller/audio, cloud security, battery monitoring, component, visual sensing and IoT with security ICs and has strong market share in Industrial, Automotive, Communication, Consumer and Computer markets. Nuvoton owns 6-inch wafer fabs equipped with diversified processing technologies to provide professional wafer foundry services. Nuvoton provides products with a high performance/cost ratio for its customers by leveraging flexible technology, advanced design capability, and integration of digital and analog technologies. Nuvoton values long term relationships with its partners and customers and is dedicated to continuous innovation of its products, processes, and services. Nuvoton has established subsidiaries in the USA, China, Israel, India, Singapore, Korea, Japan and Germany to strengthen regional customer support and global management. For more information, please visit https://www.nuvoton.com 

*Note: Nuvoton and NuMicro are registered trademarks of Nuvoton Technology Corporation. All other trademarks and copyrights mentioned herein are the property of their respective owners.

Nuvoton Media Contact
Carol Chang
Microcontroller Digital Marketing Director
+886-3-5770066 ext. 23123
YHChang8@nuvoton.com