Features
- 80MHz Arm Cortex-M33 with TrustZone
- 512KB dual bank flash supporting BGO
- 64KB SRAM with 32KB parity and 32KB ECC
- 8KB data flash
- 168µA/MHz active current, 1.65µA standby current
- Fast wake-up <3.5µS (from MOCO)
- 6 SCI (UART, Simple SPI, Simple I2C)
- 2 low-power UARTs with 32kHz support
- SPI/I2C multi-master interface
- I3C interface
- USB 2.0 FS
- CAN FD
- Quad SPI with XIP
- 32-bit and 16-bit timers, 32-bit ultra-low power timers
- 2 x watchdog timer
- Real-Time Clock (RTC)
- 12-bit ADC and 12-bit DAC
- Low-power analog comparator
- Temperature sensor
- 8 x 48 segment LCD drive
- 12-channel capacitive touch
- Serial Sound Interface (SSI)
- Advanced security engine with support for: TRNG, Unique ID, AES, ECC, and SHA
Description
The Renesas RA4L1 MCU group features low-power, 32-bit microcontrollers (MCUs) based on the Arm® Cortex®-M33 (CM33) core with TrustZone®, delivering an ideal balance of low voltage operation, low power consumption, and high performance. The RA4L1 offers operation down to 1.6V combined with a low-power standby current of as little as 1.65µA and a multitude of low-power features enabling the user to dynamically optimize power/performance to their application requirements.
These MCUs include low-power features such as segment LCD display drive and an advanced security engine, as well as RTC, ADC, and timers. These MCUs integrate communications interfaces such as CAN FD, USB 2.0 FS without the need of a crystal, I2C/I3C, and low-power UARTs making these devices ideal for many industrial automation, home appliances, smart home, consumer, building/home automation, and medical/healthcare applications.
The RA4L1 comes in a wide variety of standard LQFP and QFN package options as well as a range of space-saving BGA and CSP options and offers support for operating temperatures of -40 °C to 125 °C. The RA4L1 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) | 64 |
| Carrier Type | Full Carton (Tray), Full Tray (Tray) |
| Supply Voltage (V) | 1.6 - 3.6 |
| I/O Ports | 37, 51, 55, 85 |
| DRAM I/F | No |
| Temp. Range (°C) | Ta = -40 to +105, Ta = -40 to +125 |
| Operating Freq (Max) (MHz) | 80 |
| Ethernet speed | No |
| EtherCat (ch) (#) | 0 |
| USB FS (host ch/device ch) | ( 1 / 1 ) |
| USB HS (host ch/device ch) | ( 0 / 0 ) |
| USB SS (host ch/device ch) | ( 0 / 0 ) |
| SCI or UART (ch) | 6, 8 |
| SPI (ch) | 1 |
| I2C (#) | 1 |
| 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) | 10, 12, 16 |
| 24-Bit Sigma-Delta A/D Converter (ch) | 0 |
| 12-Bit D/A Converter (ch) | 1 |
| 8-Bit D/A Converter (ch) | 0 |
| Capacitive Touch Sensing Unit (ch) | 8, 12 |
| Image Codec | No |
| Segment LCD Controller | Yes |
| Security & Encryption | Unique ID, TRNG, AES, ECC, SHA |
Product Comparison
| RA4L1 | RA4M3 | |
| Supply Voltage | 1.6 - 3.6 | 2.7 - 3.6 |
| Temp. Range (°C) | Ta = -40 to +105, Ta = -40 to +125 | Ta = -40 to +85, Ta = -40 to +105 |
| Pkg. Type | BGA, LQFP, QFN | BGA, LQFP |
| Segment LCD Controller | Yes | No |
| CAN-FD (ch) | 1 | 0 |
| I3C (ch) | 1 | 0 |
Application Block Diagrams
 | Metal Capacitive Touch Panel with NFC for Elevator & HMI Elevator control system with sleek capacitive metal touch, CAN FD reliability, and NFC security for a premium, safe, user‑friendly experience. |
 | Wireless Spirometer Wireless spirometer tracks lung health metrics with Bluetooth/Wi-Fi connectivity and NFC charging. |
 | Mid-Range Smart Lock Designed to Support Aliro – New In-Development Standard The smart lock platform is designed to support Aliro and offers secure access and optimized power usage. |
Additional Applications
- 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, printers, QR code readers, fingerprint scanners
- Healthcare: heart rate monitors, glucose meters, oximeters, blood pressure monitors
- Voice AI applications