Features
- 80MHz Arm Cortex-M33 with TrustZone
- 512KB dual bank flash supporting BGO
- 96KB SRAM with 64KB parity and 32KB ECC
- 8KB data flash
- 168µA/MHz active current, 1.73µA standby current
- Fast wake-up <3.5µS (from MOCO)
- 6 SCI (UART, Simple SPI, Simple I2C), SSI
- 2 x low-power UARTs with 32kHz support
- 2 x I2C multi-master interface
- 3 x SPI interfaces
- CAN FD
- Quad SPI with XIP
- 32-bit and 16-bit timers, 32-bit ultra-low power timers
- 2 x watchdog timer
- High-precision Real-Time Clock (RTC)
- 12-bit ADC
- Temperature sensor with 1% accuracy
- 8 x 44 segment LCD drive
- Advanced security engine with support for: TRNG, Unique ID, AES, ECC, SHA
Description
The Renesas RA4C1 32-bit MCU group features the low-power, Arm® Cortex®-M33 (CM33) core with TrustZone® to deliver an ideal balance of low voltage operation, low power consumption, and high performance. The RA4C1 offers operation down to 1.6V, combined with a low-power standby current of as little as 1.73µA and a multitude of low-power features enabling the user to dynamically optimize power/performance to their application requirements.
The RA4C1 integrates an advanced security engine offering isolation from improper access from the CPU or a debugger, and offers a 128-bit unique ID, secure key management, and acceleration for AES, ECC, and SHA algorithms. This security feature secures data from cyberattacks and complies with the latest legislation.
Many low-power features are included in the RA4C1 MCUs, such as segment LCD display drive, RTC with a high-precision mode, ADC, and timers, as well as integrated communications interfaces such as CAN FD, I2C, SPI, and low-power UARTs. All these built-in features make the RA4C1 MCUs ideal for metering applications such as power, gas, and water meters, as well as many industrial automation, home appliances, smart home, consumer, and building/home automation applications.
The RA4C1 comes in a range of 64-pin or 100-pin LQFP packages and offers support for operating temperatures of -40°C to 105°C. The RA4C1 MCUs are fully supported by the Renesas Flexible Software Package and a comprehensive set of hardware and software development tools.
Parameters
| Attributes | Value |
|---|---|
| Main CPU | Arm Cortex-M33 |
| Program Memory (KB) | 256, 512 |
| RAM (KB) | 96 |
| Carrier Type | Full Carton (Tray), Full Tray (Tray) |
| Supply Voltage (V) | 1.6 - 3.6 |
| I/O Ports | 49, 83 |
| DRAM I/F | No |
| Temp. Range (°C) | Ta = -40 to +105 |
| Operating Freq (Max) (MHz) | 80 |
| 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) | 8 |
| SPI (ch) | 3 |
| I2C (#) | 2 |
| CAN (ch) | 0 |
| CAN-FD (ch) | 1 |
| Wireless | No |
| SDHI (ch) | 0 |
| High Resolution Output Timer | No |
| PWM Output (pin#) | 12 |
| 32-Bit Timer (ch) | 4 |
| 16-Bit Timer (ch) (#) | 4 |
| Standby operable timer | Yes |
| Asynchronous General Purpose Timer / Interval Timer (ch) | 2 |
| 16-Bit A/D Converter (ch) | 0 |
| 14-Bit A/D Converter (ch) | 0 |
| 12-Bit A/D Converter (ch) | 12, 16 |
| 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 | Yes |
| Security & Encryption | Unique ID, TRNG, AES, ECC, SHA |
Product Comparison
| RA4C1 | RA4L1 | |
| Supply Voltage | 1.6 - 3.6 | 1.6 - 3.6 |
| Temp. Range (°C) | Ta = -40 to +105 | Ta = -40 to +105, Ta = -40 to +125 |
| Pkg. Type | LQFP | BGA, LQFP, QFN |
| Segment LCD Controller | Yes | Yes |
| CAN-FD (ch) | 1 | 1 |
| I2C (#) | 2 | 1 |
| SPI (ch) | 3 | 1 |
Application Block Diagrams
 | Dual-Needle Gauge Dual-needle gauge displays two real-time values for fast, intuitive analog monitoring. |
 | Smart 1-Ph E-Meter Flexible energy metering system with wired and wireless communications, tamper detection, and isolation support. |
 | Industrial Electronic Valve Control Industrial electronic valve to offer precise, SIL2-compliant control. |
Additional Applications
- Smart meters: power meters, gas meters, water meters, flow meters
- Appliances: small appliances, home appliances
- Smart home and building automation: entry systems, intercoms, thermostats, security panels, alarm sensors, smart locks, voice recognition
- Office automation: asset management, printer display, QR code readers, fingerprint scanners
- Healthcare: heart rate monitors, glucose meters, oximeters, BP monitors, imaging equipment
- Voice AI applications
Experience the optimized performance and low power consumption that RA4C1 MCU delivers to extend your battery lifespan. Explore the integrated advanced security engine that protects your data transfer and read.
Related Resources
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News Aug 21, 2025 |
Blog Post Aug 21, 2025 |
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Blog Post Oct 13, 2022 |
Blog Post Jan 28, 2022 |