RX671 High-Performance 32-bit MCUs Renesas Electronics RX671 High-Performance 32-bit MCUs combine high performance, low power consumption, hygienic UI, and cloud connectivity in a tiny package. The RX671 has enhanced features, including a higher power efficiency of 48.8 CoreMark/mA, capacitive touch sensing, voice recognition over long distances by digital microphones, and an easy-to-mount small 48-pin HWQFN package.