Renesas boosts IoT security features on RX65N/RX651 MCUs

November 14, 2017 // By Graham Prophet
A development of Renesas’ MCU offering adds enhanced flash functionality and an optimized HMI interface for endpoint devices at the edge

The development is in the RX65N/RX651 Group of MCUs, and addresses advanced security needs for connected devices operating in industrial automation, building automation, and smart metering systems. The expanded lineup features MCUs with integrated Trusted Secure IP, and enhanced, trusted flash functionality and human-machine interface (HMI) for industrial and network control systems.


The expanded RX65N/RX651 devices support evolving security and reprogrammability needs, earning Cryptographic Algorithm Validation (CAVP) certification. These security advancements enable seamless flash firmware updates in the field through secure network communications.


Features include;

- Integrated Trusted Secure IP

These MCUs are based on the high-performance RXv2 core and a 40 nm process, which provide power efficiency for CPU operation at 4.55 Core Mark/MHz. Integrating the Trusted Secure IP into the new MCUs enables system control engineers to realize high root-of-trust levels for device operation through a combination of three new features: Protect encryption key by Trusted Secure IP; Integration of encryption hardware accelerators including AES, 3DES, SHA, and TRNG as part of Trusted Secure IP; Protect boot code by area of Flash.

The Trusted Secure IP received the CAVP certification, which ensures the customer will use a device with a high security level.

- Network connectivity and HMI features optimized for the IIoT

Renesas has optimized the new RX65N/RX651 MCUs for connected industrial environments. The new MCUs offer network connectivity and HMI support that makes it possible to: Monitor the operating state of machinery from both inside and outside the factory; Exchange data for making changes to production instructions; and reprogram the MCU’s memory to update equipment settings

Design engineers are often asked to integrate small TFT displays into their IoT edge devices or system control applications. These displays allow users to monitor machine behavior through a modern low-cost HMI solution. The RX65N/RX651 is an ideal solution for controlling these displays as it features an embedded TFT controller and an integrated 2D graphic accelerator to provide