Features
- 32MHz Arm Cortex-M23 core
- 16KB flash and 2KB SRAM
- Wide voltage range of 1.6V to 5.5V
- TAU (16-bit general PWM timer)
- TML32 (32-bit interval timers)
- 10-bit A/D converter
- Temperature sensor
- SAU (UART, Simple SPI, Simple I2C)
- I2C bus
- Safety functions
- +-1% high-accuracy high-speed on-chip oscillator
- Best-in-class HAL driver code
- Supports Arm ecosystem and Renesas original development tools
Description
The RA0E3 is a cost‑effective, entry‑level general‑purpose microcontroller (MCU) designed for low‑pin‑count applications that demand simplicity, efficiency, and reliable performance. Built on the Arm® Cortex®‑M23 core, the RA0E3 delivers ultra‑low power consumption, streamlined peripherals, and an architecture optimized to reduce BOM cost and accelerate development for the low-end MCU market.
Offering 16KB of flash, 2KB SRAM, and a wide operating voltage range of 1.6V to 5.5V, the RA0E3 provides a flexible platform for compact, power‑conscious designs. Its robust ‑40°C to 125°C operating temperature range makes it ideal for consumer, industrial, and IoT environments that require dependable performance in challenging conditions.
Parameters
| Attributes | Value |
|---|---|
| Main CPU | Arm Cortex-M23 |
| Program Memory (KB) | 16 |
| RAM (KB) | 2 |
| Carrier Type | Magazine, Tape & Reel |
| Supply Voltage (V) | 1.6 - 5.5 |
| I/O Ports | 17 |
| DRAM I/F | No |
| Operating Freq (Max) (MHz) | 32 |
| Ethernet speed | No |
| EtherCat (ch) (#) | 0 |
| USB FS (host ch/device ch) | ( 0 / 0 ) |
| USB HS (host ch/device ch) | ( 0 / 0 ) |
| USB SS (host ch/device ch) | ( 0 / 0 ) |
| SCI or UART (ch) | 2 |
| SPI (ch) | 2 |
| I2C (#) | 3 |
| CAN (ch) | 0 |
| CAN-FD (ch) | 0 |
| Wireless | No |
| SDHI (ch) | 0 |
| High Resolution Output Timer | No |
| PWM Output (pin#) | 7 |
| 32-Bit Timer (ch) | 0 |
| 16-Bit Timer (ch) (#) | 8 |
| Standby operable timer | Yes |
| Asynchronous General Purpose Timer / Interval Timer (ch) | 1 |
| 16-Bit A/D Converter (ch) | 0 |
| 14-Bit A/D Converter (ch) | 0 |
| 12-Bit A/D Converter (ch) | 0 |
| 24-Bit Sigma-Delta A/D Converter (ch) | 0 |
| 12-Bit D/A Converter (ch) | 0 |
| 8-Bit D/A Converter (ch) | 0 |
| Capacitive Touch Sensing Unit (ch) | 0 |
| Image Codec | No |
| Segment LCD Controller | No |
| Security & Encryption | 128-bit Unique ID |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TSSOP | 6.5 x 1.2 x 4.4 | 20 | 0.65 |
Application Block Diagrams
 | Heatstroke Prevention Watch A low-power wearable detects heatstroke risks and alerts users to take early action. |
 | Household Water Pump Smart water pump system with low power use, noise reduction, and enhanced safety for efficient operation. |
Additional Applications
- Consumer electronics
- System control for small appliances
- Industrial system control
- Building automation