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Nuvoton Introduces NuMicro® M2351SF – A Secure Storage MCU for Multi-Segments, Having Multi-Chip-Package with M2351 Series and Winbond’s W77F Secure Flash

Hsinchu, Taiwan - 2019/12/25 - Nuvoton Technology Corporation, a leading microcontroller platform solution provider, debuting a new NuMicro® M2351SF chip based on M2351 IoT security MCUs and Winbond TrustME® W77F Secure Flash. The M2351 Series, the first Arm® Cortex®-M23 based MCU that has been both PSA Certified™ Level 1 and PSA Functional API Certified. The M2351SF is better enhanced for its secure storage inside by stacking the Winbond W77F Secure Flash solution.

Trust is essential for the in-developing trillion connected devices, and secure storage is one of the significant required security features. The M2351SF provides an enhanced security level of much bigger secure storage for code and data for different applications. Cybersecurity is depending on mutual authentication through the end-to-end sides with IoT cloud services. To achieve the security goal, it needs a range of robust solutions including trusted boot, various keys, credentials, certificates, secure over-the-air updates for firmware and software. With the use of Winbond’s Secure Flash solution, M2351SF can well protect code and data of a microcontroller from reducing vulnerability exposures.

The Secure Flash is indeed encrypted storage for valuable assets of applications, such as biometric data, certificate authority (CA) data, system log, etc. Furthermore, the M2351SF uses a unique binding approach in between the MCU and Secure Flash together with internal connecting by encrypted SPI bus interface to ensure the confidentiality, integrity, and availability for digital assets of a microcontroller. The MCU system developers can easily design applications for security assurance demanding markets like Secure Industries, Smart Home, Smart City, and Smart Things as well as any other potential embedded devices.

In addition to the enhanced security of MCU storage, the M2351SF remains to keep all the security features with the M2351 Series, covering Armv8-M TrustZone®, Execute Only Memory (XOM), Cryptographic Hardware Accelerators, Secure Debug, system-level tamper detection pins, and all software tools for application development are same with M2351 Series.

Major features of NuMicro® M2351SF

  • Secure Storage Security
    • 4 Mbyte Flash memory density
    • Package dimension is the same with M2351 Series (LQFP-64)
    • Countermeasures against a side-channel attack, unauthorized operations against attacks of reply, rollback, man-in-the-middle, sniffer, and fault injection during data transferring between the MCU and Flash memories
  • TrustZone Security and Low Power
  • TrustZone® for Armv8-M based on Cortex®-M23 CPU
  • Low-power consumption with LDO or DC-DC power supply

M2351 Series has been in volume production with LQFP-128, LQFP-64, and QFN-33 packages. The M2351SF chip in the LQFP-64 package now is also available in the same dimension of M2351 with almost pin-to-pin compatible. Please contact Nuvoton sales office or Nuvoton Direct eStore for pricing options and sample requests.

Purchase M2351SF microcontroller and development kit online:

Know more details about NuMicro® M2351 series:


About Nuvoton Technology
Nuvoton Technology Corporation (NTC) was founded to bring innovative semiconductor solutions to the market. NTC was spun-off as a Winbond Electronics affiliate in July 2008 and went public in September 2010 on the Taiwan Stock Exchange (TSE). Nuvoton Technology focuses on the developments of microcontroller, microprocessor, smart home and cloud security IC and has strong market share in Industrial, Consumer and Computer markets. Nuvoton owns a wafer fab, featuring customized processes for analog and power products. Besides in-house IC products, the wafer fab also provides part of its capacity for foundry services. Nuvoton Technology 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. The company has established subsidiaries in the USA, China, Israel, and India to strengthen regional customer support and global management. For more information, please visit
*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.


Product Contact
Robert Ling
Technology Manager
Nuvoton Technology Corporation
Tel: +886-3-5770066 ext. 27608


News Contact
Carol Chang
Nuvoton Technology Corporation
Tel: +886-3-5770066 ext. 23123

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