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NuMicro M2351SF – ARM Cortex M23 based IoT Security Microcontroller for Secure Storage

NuMicro M2351SF – ARM Cortex M23 based IoT Security Microcontroller for Secure Storage
NuMicro M2351SF – ARM Cortex M23 based IoT Security Microcontroller for Secure Storage

Nuvoton Technology Corporation has introduced a new NuMicro M23351SF chip based on M2351 IoT security MCUs and Winbond TrustME W77F Secure Flash drive. The M2351SF is enhanced for its secure storage inside by stacking the Winbonf W77F Secure Flash solution. The company claims that M2351SF provides an improved security level of much bigger secure storage for code and data for different applications and by using  Winbond’s  Secure Flash Solutions, M2351SF can protect code and data of a microcontroller from reducing vulnerability exposures. 


The Secure Flash is encrypted storage for valuable assets of applications such as biometric data, certificate authority (CA) data, system log, etc. Furthermore, to ensure confidentiality, integrity, and availability for digital assets of a microcontroller, the M2351SF uses a unique binding approach in between the MCU, and Secure Flash together with internal connecting by encrypted SPI bus interface. 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.


Features of M2351SF MCU:

  • Secure storage security with 4 Mbyte of slash memory density and countermeasures against different types of attacks
  • Uses Armv8-M based cortex-M23 CPU for TrustZone Security and LD0 or DC-DC power supply for low-power consumption.
  • Package dimension is the same with M2351 Series (LQFP – 64)

Note: More technical details on the M2351SF MCU product can be found at the bottom of the page.


The M2351 Series, the Arm cortex – m23 based MCU has been both PSA Certified Level 1 and PSA Functional API Certified. The M2351SF continues 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 the same with M2351 Series.


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

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