The RA4W1 MCU has a 48 MHz, 32-bit Arm Cortex-M4 core and Bluetooth 5.0 core in a 56-pin QFN package. The device also offers 512 KB flash, 96 KB SRAM, and additional connectivity includes USB, CAN, and Renesas’ HMI capacitive touch technology. Renesas’ Secure Crypto Engine supports symmetric encryption and decryption, hash functions, true random number generation (TRNG), and advanced key handling with key generation and MCU-unique key wrapping.
The RA4W1 has full Bluetooth 5.0 support including 2 Mbps data throughput, all advertising extension functions with maximum advertising length (1650 Byte), periodic advertisements, and channel selection algorithm #2 for applications requiring large amounts of traffic. It has a low peak power consumption of 3.3mA when receiving and 4.5mA (@0dBm) during transmission. The sensitivity of the MCU is -105dBm in 125kbps mode without additional loss from external components.
Renesas also offers several API functions that conform to all standard profiles, including a Heart Rate Profile (HRP), an Environment Sensing Profile (ESP), and an Automation I/O profile (AIOP).
Simultaneous development of communication control and system control can be easily accomplished through the development environment. Renesas’ Smart Configurator GUI generates Bluetooth code, MCU peripheral function driver code and pin settings for the e2 Studio IDE. Renesas’ QE tool for BLE generates programs for custom profiles and embeds them in user application programs. The Bluetooth Trial Tool Suite GUI allows users to perform initial wireless characteristics evaluations and Bluetooth functional verification.