For more information about our products and tools, please refer to the following.
RX671: RX671 - 32-bit Microcontrollers for Fast Real-Time Control and Contactless HMI
RX631: RX631 - 32-bit Microcontrollers with Enhanced Security, Image Capture
Differences between RX671 Group and RX631 Group: https://www.renesas.com/search?keywords=R01AN5766
RX Family Development Environments: RX Family Development Environment