Nuvoton Debuts PSA Certified Level 1 and PSA Functional API Certified Arm Cortex-M23 Based MCU for Global Market Targeting IoT Security

Hsinchu, Taiwan – Feb. 26th, 2019 –Nuvoton Technology Corporation, a leading microcontroller platform solution provider, is showing the latest achievements with the NuMicro® M2351 Series. The M2351 is the first Arm® Cortex®-M23 based MCUs that has been both PSA Certified ™ Level 1 and PSA Functional API Certified. The certification process was conducted at Beijing’s CTTL-Terminal Laboratory (China Telecommunication Technology Laboratory), which belongs to CAICT (China Academy of Information and Communication Technology).

Nuvoton takes the shared responsibility of security with Arm and its ecosystem very seriously and together work towards the vision of a trillion connected devices. We can expect anything connected to the internet to be hacked eventually, so security can never be optional. Therefore to implement security in a trusted manner, independent testing is crucial.

PSA Certified provides a simple and comprehensive approach to security testing. It comprises two elements: a multi-level, security robustness scheme (Levels 1, 2 and 3) and a developer focused API test suite. PSA Certified enables device makers to achieve the security required for their use case through these three progressive levels of security assurance, each requiring increasingly rigorous hardware and software evaluation, which are assigned by analyzing the use case threat vectors.

“In a world of a trillion connected devices trust is essential, and it’s our industry’s responsibility to enable this trust,” said Paul Williamson, VP and GM, Emerging Business Group at Arm. “PSA Certified enables IoT solution developers and device makers to verify their solutions have been designed with a secure foundation, in line with PSA principles. Nuvoton is the first of our partners to deliver both a Level 1 PSA Certified and PSA Functional API Certified solution with the NuMicro® M2351 Series.”

If the robustness of a device’s security can be certified by a trusted third party, people can trust in this device and enable the deployment of many of these devices at scale. Nuvoton selects the M2351 Series microcontrollers to be PSA Certified with CTTL, Beijing. Furthermore, M2351 Series has equipped enough functionality for a final IoT product design so we do believe our customers will benefit from all offerings of the series easily to build secure IoT applications to scale faster and more cost effectively.

“CTTL has accumulated and practiced in the field of information security testing and certification of mobile devices. This time, assisting Nuvoton Technology’s M2351 Series to complete PSA certification also shows that security is gradually gaining importance in the field of Internet of Things,” said Vicky Quo, Director of CTTL-Terminal Lab.
“We believe this certification will help guide the industry to a healthier direction”

In achieving PSA Functional API Certification, Nuvoton better enables ecosystem software compatibility to PSA standards, independent of hardware platforms. There is an open source project, Trusted Firmware-M (TF-M), for minimizing production effort and ease of software integration. It’s highly configurable to suit target applications on constrained devices. TF-M is eligible to be a foundation for a secure IoT platform, e.g. NuMicro® M2351Series, TrustZone® for Armv8-M devices.


Major features of NuMicro® M2351 Series
• Arm® Cortex®-M23 with TrustZone® processor capable of supporting:
• 64 MHz operating frequency
• 512 K-Byte Flash/ 96 K-Byte SRAM
• Secure Bootloader
• Secure Debug
• Cryptographic Hardware Accelerators covering AES, SHA, DES/3DES, ECC
• Tamper detection pins
• Arm Pelion IoT Platform connection support
• Low-power consumption with LDO or DC-DC power supply

M2351 Series has been in volume production since Q3 end, 2018 with LQFP-128, LQFP-64 and QFN-33 packages. Please contact your Nuvoton sales office or Nuvoton Direct eStore for pricing options and sample requests.
Understand more about NuMicro® M2351:

More information:

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 became public in September 2010 on the Taiwan Stock Exchange (TSE). Nuvoton Technology focuses on development of analog/mixed signal, microcontroller, cloud and computing products and has strong market share in Industrial, Consumer and Computer markets. Nuvoton owns a wafer fab, featuring customized processes for analog, power and MCU 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 trademarks or 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. 37608

News Contact
Carol Chang
Nuvoton Technology Corporation
Tel: +886-3-5770066 ext. 33123



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