RA4W1 32-Bit Microcontroller Renesas Electronics RA4W1 32-Bit Microcontroller, based on a 48MHz Arm® Cortex®-M4 core, features integrated BLUETOOTH® 5.0 Low Energy (BLE) making it an ideal choice for low-power IoT devices. An on-chip capacitive touch sensing unit (CTSU) and a segment LCD controller (SLCDC) enable simple integration into human-machine interface (HMI) applications. Additional features include 512KB code flash memory, 96KB SRAM, a 14-bit ADC, a 12-bit DAC, and a USB 2.0 full-speed (USBFS) module.