Renesas introduces MCUs focused on energy conservation

2 mins read

Renesas Electronics has introduced the RA2A2 microcontroller (MCU) Group based on the Arm Cortex-M23 processor.

These low-power devices offer a 24-bit Sigma-Delta analogue-to-digital converter (SDADC), and a dual-bank code flash and bank swap function making it easier to implement firmware over-the-air (FOTA) updates for smart energy management, building automation, medical devices, consumer electronics and other IoT applications that can benefit from firmware updates.

The RA2A2 devices offer multiple power structures and voltage detection hardware to enable energy-efficient, ultra-low power operation as low as 100 µA/MHz in active mode and 0.40µA in software standby mode.

An independent power supply real-time clock extends battery life for applications requiring long lifetime management in extreme conditions and these new MCUs also offer AES hardware acceleration, a high-precision (±1.0%), high-speed on-chip oscillator, a temperature sensor, and a wide operating voltage range from 1.6V to 5.5V.

RA2A2 MCUs have been designed to help with the digitalisation of conventional systems with key features including high-level analogue sensing, FOTA support, 8KHz/4KHz hybrid sampling, and AES hardware accelerator functions.

When end-systems are digitalised, it becomes possible to analyse individual systems status seamlessly for further energy-efficient, streamlining system operation. For example, next generation smart electricity meters with Non-Intrusive Load Management (NILM) technology enable energy consumption monitoring based on detailed analysis of the current and voltage of the total load. The adoption of smart meters with NILM is a cost-effective and scalable solution for increasing energy efficiency and lowering energy consumption.

“Renesas has worked closely with our customers to understand their requirements for next-generation systems that can support critical energy conservation goals,” said Akihiro Kuroda, Vice President of the Embedded Processing 2nd Division at Renesas. “The RA2A2 Group MCUs are the result of that collaboration and will enable significant energy savings in a wide array of systems.”

Key features of the RA2A2 Group MCUs

  • Core: 48MHz Arm Cortex-M23
  • Memory: 512KB integrated, dual-bank Flash memory and 48KB SRAM
  • Analogue Peripherals: 24-bit Sigma Delta ADC with digital filter, 12-bit ADC, and temperature sensor.
  • Packages: 100-, 80- and 64-pin LFQFP

The RA2A2 Group are supported by Renesas’ Flexible Software Package (FSP) which enables faster application development by providing all the infrastructure software needed, including multiple RTOS, BSP, peripheral drivers, middleware, connectivity, networking, and security stacks as well as reference software to build complex AI, motor control and cloud solutions.

It allows customers to integrate their own legacy code and choice of RTOS with FSP, providing full flexibility in application development. Using the FSP will ease migration of RA2A2 designs to larger RA devices if customers wish to do so.

The RA2A2 Group MCUs are available now.