Renesas unveils RXv3 CPU core powering up new 32-Bit RX MCU families

Renesas Electronics announced the development of its third-generation 32-bit RX CPU core, the RXv3. The RXv3 CPU core will be employed in Renesas’ new RX microcontroller families that begin rolling out at the end of 2018. The new MCUs are designed to address the real-time performance and enhanced stability required by motor control and industrial applications in next-generation smart factory, smart home and smart infrastructure equipment.

The innovative RXv3 core boosts the proven Renesas RX CPU core architecture with up to 5.8 CoreMark/MHz. The RXv3 core is backwards compatible with the RXv2 and RXv1 CPU cores in Renesas’ current 32-bit RX MCU families. Binary compatibility using the same CPU core instruction sets ensures that applications written for the previous-generation RXv2 and RXv1 cores carry forward to the RXv3-based MCUs. Designers working with RXv3-based MCUs can also take advantage of the robust Renesas RX development ecosystem to develop their embedded systems.

The unique RX CPU core combines a design optimized for power efficiency and a fabrication process producing excellent performance. The new RXv3 CPU core is primarily a CISC (Complex Instruction Set Computer) architecture that offers significant advantages over the RISC (Reduced Instruction Set Computer) architecture in terms of code density. RXv3 utilizes a pipeline to deliver high instructions per cycle (IPC) performance comparable to RISC. The new RXv3 core builds on the proven RXv2 architecture with an enhanced pipeline, options for register bank save functions and double precision floating-point unit capabilities for the highest computing performance, power and code efficiency.


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