The RA4W1 from Renesas is a Bluetooth® 5.0 Low Energy MCU with 2 Mbit High-Throughput (HT) and Long Range support for IoT applications requiring a high-performance Arm® Cortex®-M4 core at a low price point. The MCU is built on a highly efficient low power process and is supported by an open and flexible ecosystem concept, called Flexible Software Package (FSP), using FreeRTOS as a base. It has been purpose-built for IoT applications requiring Security, large embedded RAM, and low power consumption.
This Bluetooth 5.0 MCU delivers a data rate of up to 2 Mbps, has a Tx power of up to 6 dBm, and an Rx sensitivity of up to -105 dBm. It consists of a 48-MHz 32-bit Arm Cortex-M4 Core, 512-KB code flash memory, 96-KB SRAM, 14-bit ADC, 12/8-bit DAC, 2 Low Power Analog Comparators (ACMPLP), an Operational Amplifier (OPAMP), a Temperature Sensor (TSN), a capacitive touch sensing unit and a segment LCD controller. The MCU requires a DC supply of 1.8-3.6 V and consumes less than 106 mA of current. It can be controlled via USB 2.0, UART, I2C, SPI and CAN interfaces.
The RA4W1 has safety features like parity error check and ECC in SRAM, flash area protection, ADC self-diagnosis function, register write protection, main oscillator stop detection, illegal memory access detection. It has several system and power management functions like low power modes, Realtime Clock (RTC) with calendar and battery backup support, power-on reset function, Low Voltage Detection (LVD) with voltage settings etc. The MCU is available in a QFN package that measures 7.0 x 7.0 x 0.4 mm and is ideal for security (fire detection, burglar detection, panel control), metering (electricity, automated meter reading), industry (robotics, door openers, sewing machines, vending machines, UPS), health & wearables body sensors, remote control toys and smart home IoT applications.
