Overview
Description
The RA2L1 group is based on the Arm® Cortex®-M23 core, the most energy-efficient CPU among Arm Cortex-M today. The optimized processing and Renesas’ low power process technology makes it the industry's most energy-efficient ultra-low power microcontroller. The RA2L1 group supports a wide operating voltage range of 1.6V to 5.5V, and a maximum CPU clock frequency of 48MHz, lower active mode current, and standby mode current. The RA2L1 group also features an enhanced Capacitive Touch Sensing Unit (CTSU2), a set of serial communication interfaces, highly accurate converters, and timers. The products are available with pin counts ranging from 48-pin to 100-pin.
Features
- 48MHz Arm Cortex-M23
- 128kB/256kB Flash Memory and 32kB SRAM with ECC
- 8kB Data Flash to store data as in EEPROM
- Scalable from 48-pin to 100-pin packages
- Internal voltage regulators
- Enhanced Capacitive Touch Sensing Unit (CTSU2)
- 12-bit ADC, 12-bit DAC, LPACMP
- 32-bit general PWM timer, 16-bit general PWM timer, low power asynchronous general-purpose timer
- RTC
- SCI (UART, Simple SPI, Simple I2C)
- SPI/I2C multi-master interface
- CAN
- Safety
- Security and encryption
Comparison
Applications
Design & Development
Software & Tools
Sample Code
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
Get quick technical support online from Renesas Engineering Community technical staff.
Support Communities
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Does the FSP configurator support LittleFS directly for RA2L1?
Hello, I want to run LittleFS on a NOR flash chip from MXIC (MX25R6435F). I found and installed a PACK file to import into e2studio.Does the FSP configurator support LittleFS directly for RA2L1? on other models the LittleFS port appears in the FSP configurator. example showing the port to ...
Nov 10, 2023 -
SSD1306 using I2C in RA2L1
Hi,Is there any library for RA2L1MCU's SSD1306 OLED using I2C interface,If yes please provide the link, Thanks. [locked by: AZ [Renesas] at 9:52 (GMT 0) on 16 Jul 2025]
Jan 10, 2024 -
RA2L1 AES-256 encrption,decryption problem
... DOCUMENT：https://renesas.github.io/fsp/group___r_m___p_s_a___c_r_y_p_t_o.html Appication： PC(AES 256-bit encryption)-> RA2L1(AES 256-bit decryption) ->device Please provide me RA2L1 PC tool or some AES document(RA2L1) for our exploition,thanks.
Nov 16, 2022
FAQs
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EK-RA2L1 Schematic Missing Connections
Suitable Products
Apr 14, 2022 -
Errata to EK-RA2L1 schematic and manual on MikroBUS Connector for ES Boards
Last Updated: 10/12/2021 There appears to be an error in the schematics and documentation for the EK-RA2L1 ES board. From tests it would appear that CS of the MikroBUS connector is connected to P1_04 of the RA2L1, not P1_03. The below attached project ...
Oct 12, 2021 -
Running RA2L1 UART at 1MBps Example
Last Updated: 11/30/2021 The attached project using e2studio v3.3.0 and with an EK-RA2L1 board runs the UART at 1MBps without issue. In project Properties, make sure Baud Rate Modulation is Enabled and set baud rate to 1000000. See the below output display: Suitable ...
Nov 30, 2021
Videos & Training
Introducing the RA2L1 Group of 48MHz ArmⓇ CortexⓇ-M23 ultra-low power general-purpose microcontrollers (MCUs). These MCUs deliver industry-leading power efficiency with enhanced peripherals for IoT applications.
