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Renesas’ new RX23W is a wireless microcontroller which is based on the high-performance, 54MHz 32-bit RXv2 CPU core, and which offers full Bluetooth® 5.0 networking functionality.

It provides an ideal way for RX family MCU users to add Bluetooth 5.0 connectivity to their designs, and for designers to implement secure wireless point-to-point or mesh networking. The RX23W supports the full set of Bluetooth Low Energy single-mode functions specified in the Bluetooth 5.0 standard: it transfers data at rates up to 2Mbits/s, and over a long range of up to 400m.

The RX23W’s RXv2 core provides higher performance than the Arm® Cortex®-M4 processor used in many competing wireless MCUs. The RX23W’s powerful core supports the operation of a rich set of peripherals including a USB 2.0 controller and a CAN controller, as well as capacitive touch sensing.

Security is another strong suit of the RX23W: Trusted Secure IP (TSIP) in the RX23W MCU provides strong key management and advanced encryption capability.

The MCU is notable for its excellent power efficiency. It features lower peak power consumption than any competing wireless MCU, with just 3mA in Receive mode. It also offers industry-best sensitivity of -105dBm at 125kbits/s.

Renesas has made the RX23W easy to implement in end-product designs. No external parts are required for the RF antenna line because the RX23W integrates a complete on-chip matching circuit and the RF oscillator adjustment circuit.

RX23W: Available in BGA (left) and QFN (right) packages

  • Memory provision:
    • 512kbytes maximum program Flash
    • 64kbytes maximum SRAM
  • 14-channel, 12-bit ADC
  • Supply-voltage range: 1.8V to 3.6V
  • Operating-temperature range: -40°C to 85°C
  • Healthcare equipment
  • Home appliances
  • Building automation
  • IoT devices
  • Industrial products


FTM Development Board

Renesas supplies target boards for devices in the RX family to provide a means to evaluate the MCU and develop prototypes based on it. The target board incorporates an emulator circuit, and provides through-holes for Arduino®-style pin headers which give access to all the MCU’s signal pins.