Overview
Description
The MCU in this series incorporates an energy-efficient and performant Renesas RISC-V 32-bit core, that is particularly well-suited for cost-sensitive and low-power applications. It features 128KB code flash memory, 4KB data flash, 16KB SRAM with ECC support, many timers and serial connectivity interfaces, a high number of IOs with output current control, and rich analog functionality (12-bit A/D Converter, DAC, comparator). The device supports 125°C temperature operation and can be delivered in 16 WLCSP, 24, 32 and 48 QFN package options. Renesas provides a complete free-of-charge development ecosystem including e2 studio IDE, code generator, compiler toolchain, flashing tools, and application notes to assist the end user in developing and deploying this new technology in a product. Additional commercial environments like IAR Embedded Workbench and SEGGER Embedded Studio are available for this MCU.
Features
- State-of-the-art 32-bit CPU core based on RISC-V, with high computing power at 48 MHz operation
- Rich analog and digital peripheral mix
- 16 WLCSP, 24/32/48 QFN package (QFP option), 125°C temperature support
- Low voltage and low power operation, low active current
- Easy to use by simple configuration & generation of optimized software for small memory footprint
Comparison
Applications
Design & Development
Software & Tools
Software & Tools
| Software title
|
Software type
|
Company
|
|---|---|---|
| Renesas Flash Programmer (Programming GUI) Flash memory programming software [Support MCU/MPU and devices: RA, RE, RX, RL78, RH850, RISC-V MCU Renesas Synergy, DA1453x, DA1459x, DA1469x, DA1470x, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver, V850, 78K0R, 78K0]
|
Programmer (Unit/SW) | Renesas |
| PG-FP6 Flash memory programmer [Programming software: Dedicated GUI-based software, the "FP6 Terminal"] [Support MCU/MPU and devices: RA, RE, RX, RL78, RH850, RISC-V MCU, Renesas Synergy, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver, SuperH RISC engine, V850, 78K, R8C]
|
Programmer (Unit/SW) | Renesas |
| E2 emulator Lite [RTE0T0002LKCE00000R] On-chip debugging emulator. Also available as a flash memory programmer. [Support MCU/MPU: RA, RE, RL78, RX, RISC-V MCU]
|
Emulator | Renesas |
| SEGGER J-Link and J-Trace PRO With their outstanding performance, robustness, and ease of use, J-Link debug probes are widely recognized as the market-leading debug probes today.
|
Emulator | SEGGER |
| IAR Embedded Workbench for RISC-V IAR Embedded Workbench for RISC-V MCUs
|
IDE and Coding Tool | IAR Systems |
| SEGGER Embedded Studio for RISC-V SEGGER Embedded Studio for Renesas R9A02G21 RISC-V MCUs
|
IDE and Coding Tool | SEGGER |
| e² studio - information for RISC-V MCU Eclipse-based Renesas integrated development environment (IDE).
|
IDE and Coding Tool | Renesas |
| RISC-V Smart Configurator RISC-V Smart Configurator is an automatic driver generation tool for internal peripheral I/O modules through GUI settings.
|
Solution Toolkit | Renesas |
| E2 emulator [RTE0T00020KCE00000R] On-chip debugging emulator. Also available as a flash memory programmer. [Support MCU/MPU: RA, RE, RH850, R-Car D1, RL78, RX, RISC-V MCU]
|
Emulator | Renesas |
|
9 items
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Sample Code
Boards & Kits
Development
FPB-R9A02G021
Active
FPB-R9A02G021 RISC-V MCU Fast Prototyping Board
The FPB-R9A02G021 Fast Prototyping Board provides an entry point for evaluation, prototyping and development with the R9A02G021 MCU. Moreover, since this board incorporates a SEGGER J-Link™ emulator circuit, you can use it for designing your own applications without further investments in tools....
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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.
Product Options
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Support
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Resources
Partners
IAR Systems
Complete development toolchain providing one toolbox in one view, giving you one uninterrupted workflow. As a well-established frontrunner in the embedded industry, you can rely on IAR Embedded Workbench to compile, analyze and debug your code in the most efficient way.
SEGGER
Embedded Studio for RISC-V is the development environment for devices based on the open RISC-V architecture. Whether you use an available device or designed your own chips, Embedded Studio offers a complete solution to develop and debug your application.
Support Communities
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Getting started with FPB-R9A02G021 + e2studio on macOS
Hello, I'm stuck right now and can not get a working development environment. I'm not new to MCU alltogether but I'm new in the Renasas ecosystem Host device: MacBook Pro with M1 Pro (Apple Silicon) I downloaded: e2studio_installer-2025-04_macosx_host.txz - e2studio standalone app ...
May 14, 2025 -
R9A02G021 -> HOCO Frequency out of tolerance?
Hello, In our design we use R9A02G021 microcontroller, that uses HOCO as main oscillator with frequency set to 32MHz. We observed that BSP calls for R_BSP_SoftwareDelay(100, BSP_DELAY_MICROSECS); seems to be inacurate measured ~81ms vs 100ms expected. We did activate CLKOUT to see the clock frequency ...
Mar 12, 2025 -
RISC-V FPB-R9A02G021 Fast Prototyping Board - cJTAG
I have bought RISC-V based MCU -- FPB-R9A02G021 Fast Prototyping Board. Facing issue with cJTAG when trying to build the target. May I know the debug connection required on the board? I don't find the specific Forum for RISC-V based MCUs and so I am posting my ...
Jul 17, 2024
FAQs
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Using IAR RISC-V tools to work with the Renesas R9A02G021 Fast Prototyping Board
The Fast Prototyping board has the onboard JLINK so you will have to use the Segger JLINK GDB Server to this setup. Configuration options in IAR Embedded Work Bench The entry for the TCP/IP Address or hostname[.port] is different that what you expect this entry is using ...
Sep 20, 2024
Videos & Training
Watch this lab overview of the features, low-power operation, design resources, and fast prototyping board for the general-purpose RISC-V MCU with Renesas core.