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New RA4E1 MCUs Based on Arm Cortex-M33 Core offer Optimal Value with Low Power Performance and Feature Integration

RA4E1 Entry-line MCUs
RA4E1 Entry-line MCUs

Renesas Electronics has announced the expansion of its 32-bit RA Family of microcontrollers (MCUs) with a new Group based on the latest Arm Cortex-M33 core. The new 100-MHz RA4E1 Group has good power consumption balanced with high performance and optimized feature integration. The RA4E1 MCUs are the first Entry-Line Group in the 100-MHz RA4 Series and the group includes four different parts, spanning from 48-pin to 64-pin packages, and from 256kB to 512kB of flash memory along with 128kB of SRAM. These devices are ideal for cost-sensitive applications and other systems requiring an optimal combination of performance and low power consumption.


The RA4E1 devices offer the lowest active power consumption in their class, using only 60µA / MHz while executing from Flash at 100MHz and deliver an optimized combination of innovative peripherals, connectivity options, and system cost saving features.



  • 100MHz Arm Cortex-M33 with TrustZone

  • 256kB - 512kB Flash memory and 128kB SRAM

  • 8kB Data Flash to store data as in EEPROM

  • 1kB Stand-by SRAM

  • Scalable from 48-pin to 64-pin packages

  • USB 2.0 Full Speed

  • CAN 2.0B

  • Quad SPI

  • SCI (UART, Simple SPI, Simple I2C)

  • SPI/I2C multi-master interface



  • General purpose

  • Home Appliances (Smart Coffee Machine)

  • Smart Home and Building Automation (Voice command, Smart IoT Air Filter)

  • Industrial sensor hub with for flow, humidity, temperature, etc.

  • Home entertainment (housekeeping MCU)



The new RA4E1 MCUs are now available and to help engineers get started with the RA4E1 MCUs, Renesas is offering the FPB-RA4E1 fast prototype board with an on-chip debugger priced in the 20 USD range.

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