Renesas launches 64-bit MCU for IoT edge and gateway devices

2 mins read

Renesas has introduced a new 64-bit general-purpose microprocessor (MPU) for IoT edge and gateway devices that consumes significantly less power.

The latest addition to Renesas’ RZ/G Series MPU, the RZ/G3S is designed for modern IoT devices, offering power consumption as low as 10µW in standby mode and fast startup for the Linux operating system.

The device comes with a PCI Express interface that enables high-speed connectivity with 5G wireless modules and enhanced security features such as tamper detection to ensure data security. These features make it suitable for IoT applications such as home gateways, smart meters, and tracking devices.

“Renesas’ RZ/G has seen a steady increase in adoption in the global industrial human machine interface market,” said Daryl Khoo, Vice President of Embedded Processing 1st Division at Renesas. “The RZ/G3S represents the next generation products that will extend our reach to the rapidly growing 5G IoT and Gigabit Wi-Fi 7 gateway markets. Renesas has been aggressively expanding our connectivity portfolio in these markets through strategic acquisitions to offer advanced connectivity solutions that are power efficient at the system level and enhance data utilisation."

The RZ/G3S employs an Arm Cortex-A55 core as the main CPU with a maximum operating frequency of 1.1 GHz and two Cortex-M33 cores as sub-CPUs operating at 250 MHz.

Users can distribute the MPU’s workloads to sub-CPUs, allowing the device to efficiently handle tasks such as receiving data from sensors, controlling system functions and managing power systems. This reduces the workload on the main CPU, resulting in fewer components, lower costs and a smaller system size.

The device’s power management system is designed to reduce power consumption to extremely low levels -- less than 10 µW. The MPU also supports the DDR self-refresh function which allows to retain DRAM data, while also enabling fast Linux startup. The fast startup allows IoT devices, which frequently operate intermittently, to save power and significantly extend the runtime of battery-powered devices. Moreover, the device offers a standby mode that can maintain sub-CPU operation at a power level as low as 40 mW, offering the ability to optimise power consumption based on the specific operating requirements of each application.

The RZ/G3S is equipped with a wide range of peripheral functions including Gigabit Ethernet, CAN, USB, as well as the PCI Express interface. By connecting with 5G communication modules, the device can achieve high-speed communication at Gigahertz levels.

Similar to other RZ/G devices, the RZ/G3S features an ECC (Error Correction Code) function in both internal memory and external DDR interface to maintain data integrity. The Verified Linux Package (VLP) based on the industrial-grade Linux software (Civil Infrastructure Platform (CIP) Linux) is available for the RZ/G3S.

With VLP, developers receive over 10 years of maintenance support, ensuring long-term protection against security threats. The device also provides tamper detection along with secure boot, secure debug and more. RZ/G series products are already Level 2 PSA Certified from Arm and Renesas has plans to include the RZ/G3S in the future.

“Our IAR Embedded Workbench for Arm inherently supports both MPUs and MCUs,” said Anders Holmberg, CTO at IAR. “By combining Renesas’ RZ/G3S MPU, which features a highly secure Root of Trust, with extensive security tool solutions from IAR, developers can rapidly develop high-performance, secure IoT devices and bring them to market faster."