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) | 6 |
| 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, AES256, ECC384, SHA512 |
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, Tj = -40 to +125 |
| Pkg. Type | LQFP | CSP, HWQFN, LFBGA, LQFP |
| 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