Overview
Description
The RA0E2 group is a basic, simple microcontroller (MCU) in the entry line of the RA0 series, offering excellent cost-effectiveness and ultra-low power consumption. In addition, it is a ROM/PIN extension product of the RA0E1 group, with which it is highly compatible. It delivers up to 32MHz of CPU performance using an Arm® Cortex®-M23 core with up to 128KB of embedded flash memory, 16KB SRAM, and a wide operation temperature range from -40 to 125°C. The RA0 series is ideal for cost-sensitive applications such as low power and lower cost for consumer electronics, system control for small appliances, industrial system control, and building automation.
Features
- 32MHz Arm Cortex-M23 core
- Up to 128KB Flash and 16KB SRAM
- 2KB data flash memory (100,000 program / erase (P/E) cycles)
- 32-pin, 48-pin, and 64-pin package options
- Wide operating temperature range from -40 to 125°C
- Wide voltage range of 1.6V to 5.5V
- +-1% high-accuracy high-speed on-chip oscillator
- TAU (16-bit general PWM timer)
- TML32 (32-bit interval timers)
- RTC
- 12-bit A/D converter
- Temperature sensor
- SAU (UART, Simplified SPI, Simplified I2C)
- UART
- I2C bus
- Random number generator
- Safety functions
- Flexible power architecture with fast wake-up
- Best-in-class HAL driver code
- Supports Arm ecosystem and Renesas original development tools
Comparison
Applications
Design & Development
Software & Tools
Sample Code
Sample Code
Filters
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| Type | Title | Date Date |
| Sample Code | ZIP 4.90 MB 日本語 | |
| Sample Code | ZIP 10.41 MB | |
| Sample Code | ZIP 1.17 MB | |
| Sample Code |
[Software=RA Flexible Software Package|v5.9.0],[Toolchains=GNU Arm Embedded|13.2.1.arm-13-7]
ZIP
11.78 MB
Application:
Communications Infrastructure, Consumer Electronics, Industrial
Compiler:
GNU ARM Embedded
Function:
Software Package
IDE:
e2 studio
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| Sample Code |
[Software=RA Flexible Software Package|v5.9.0],[Toolchains=GNU Arm Embedded|13.2.1.arm-13-7]
ZIP
1.93 MB
Application:
Communications Infrastructure, Consumer Electronics, Industrial
Compiler:
GNU ARM Embedded
Function:
Software Package
IDE:
e2 studio
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5 items
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Boards & Kits
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Support
Support Communities
Renesas Academy
FAQs
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Difference between RA0E1 and RA0E2
Last Updated: 04/22/2025 Question: What are the differences between RA0E1 and RA0E2? Answer: RA0E1 and RA0E2 differ in the following 6 points. Memory size Operating temperature range Number of serial communication channels Number of ADC channels Package lineup Current consumption RA0E1 RA0E2 Memory Code Flash 64KB ...
Apr 22, 2025 -
Evaluation boards for RA0 series
RA Family is preparing three types of evaluation board in public following RA kit strategy. First one is EK-Board which aiming for seamlessly evaluation by supporting rich on-board features. Second one is Fast Prototyping board (FPB) specialized for prototype development for a variety of applications. Last one is ...
Apr 22, 2025 -
What is RA0 Series?
RA0 series are an RA family’s most low-end product line-up with Cortex-M23 CPU and optimized peripherals for cost-sensitive applications. The RA0 MCUs also integrate timers, serial communications, analog functions, safety functions and HMI functionality to reduce customer BOM cost.
Apr 22, 2025
Videos & Training
This video introduces the RA0E2 microcontroller, designed for smarter, scalable designs with cost-effectiveness and ultra-low power consumption. Compatible with the RA0E1 group, it features up to 128KB of embedded flash memory and operates efficiently across a wide temperature range. Perfect for applications in consumer electronics, small appliances, industrial systems, and building automation, the RA0E2 delivers reliable performance where it matters most.
Related Resources
Additional Videos
Events & Webinars
News & Blog Posts
News
Apr 22, 2025
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Blog Post
Apr 22, 2025
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Blog Post
Oct 13, 2022
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Blog Post
Jan 28, 2022
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