Renesas' RA2L1 group is based on the Arm® Cortex®-M23 core, the most energy-efficient CPU among Arm Cortex-M today. The optimized processing and Renesas’ low power process technology make it one of the industry's most energy-efficient, ultra low-power microcontrollers. The RA2L1 group supports a wide operating voltage range of 1.6 V to 5.5 V, a maximum CPU clock frequency of 48 MHz, lower active mode current, and standby mode current. The RA2L1 group also features an enhanced capacitive touch sensing unit (CTSU2), a set of serial communication interfaces, highly accurate converters, and timers. The products are available with pin counts ranging from 48 pins to 100 pins.