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RX Family


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Development Environment for RX Family

Starter Kit Evaluation Board Integrated Development Environment e2 studio, CS+ Sample Code Middleware Device Driver OS Design tools Build tools Debugging tools E20 E1 E2 Lite Flash Programming Software Renesas Flash Programmer Flash Programmer PG-FP5

e² studio and CS+, our integrated development environments, are easy to use, scalable to match your development needs, have a proven track record, and fully support the RX family. They enable you to handle everything from coding and building to evaluation and verification.

They provide the necessary environment for all stages of the RX application development process and are backed by comprehensive support services, enabling customers to develop new systems in less time.

Allows smooth coding, building, and debugging with one integrated development environment.

  • - A free evaluation version is also available for the building tools and the flash programming software.
  • - The simulator is included in the compiler package.
  • - The tool lineup differs depending on the product group of the RX family. See the following Product Lineup List (by RX MCU Group) for details.

〈RX Family Development Tool Lineup〉

Series Software Tools Real-time OS Emulators Programming Tools Programming Software
C/C++ Compiler Package for RX Family
CS+(*1), e² studio(*2)
RI600V4 RI600PX
E2 Lite E1 E20
E1, E20
Renesas Flash Programmer
RX100 -
RX700 -

✔: Supported, △: Some Support, -: Not Supported

  • *1. This includes the CS+ integrated development environment itself, a simulator, etc.
  • *2. The package does not actually include an IDE, simulator, or emulator debugger. However, it can be used with the e² studio IDE if you install it separately.
  • *3. This only applies to devices with an MPU (memory protection unit).
  • *4. △: Supported debugging functionality is only equivalent to that of the E1. ✔: Full functionality is supported.
  • *5. This is in the case of use with a programming GUI (provided free of charge).
  • *6. These are in the case of use with the Renesas Flash Programmer programming software (a free evaluation version is available).

※ Refer to the annex table regarding the High-performance Embedded Workshop IDE and further tools other than those mentioned above.


Software and Tool Product Lineup List

You can find a list of development environment products and their support status for each RX MCU group here :
RX71M Group | RX610 Group | RX621, RX62N Group | RX62G Group | RX62T Group | RX630 Group | RX63N, 631 Group | RX63T Group | RX64M Group | RX210 Group | RX220 Group | RX21A Group | RX231 Group | RX23T Group | RX110 Group | RX111 Group | RX113 Group |


Integrated Development Environment

Integrated development environments—powerful and comprehensive support for developing embedded systems

Renesas integrated development environments provide powerful support for developing applications to run on devices of the RX family.



[e² studio]
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e² studio


Learn more about this product
Download free evaluation version

[Note] CS+ is not generally promoted in the U.S. and Europe. For customers in the U.S. and Europe who are interested in CS+, please contact our regional marketing departments for details.


<Transition guide>
For customers making the switch from the High-performance Embedded Workshop to CS+, we provide a transition guide covering differences in functionality and operations between the High-performance Embedded Workshop and CS+, and procedures for the transition. CS+ is an all-in-one package designed as an easy-to-use integrated development environment with a GUI-based interface and extensive pop-up menus. Nevertheless, its operation may seem unfamiliar to users accustomed to the High-performance Embedded Workshop so such users may have difficulty locating the functions they need. The transition guide is designed to help users avoid such inconveniences as far as is possible.
Integrated Development Environment for RX Family - Migration to CubeSuite+ (Build)
Integrated Development Environment for RX Family - Migration to CubeSuite+ (Emulator)

[Note] We do not plan to make the High-performance Embedded Workshop compatible with the RX700 Series, the RX64M Group and the RX100 Series. The High-performance Embedded Workshop only supports the RX210, RX220 and RX21A Groups of the RX200 Series.


Starter Kits

Ready-to-Use Starter Kits
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Want to get started evaluating RX Family products right away? Renesas Starter Kits are just what you are looking for. They contain all the development environment elements needed for MCU evaluation and initial implementation. Since all of the MCU's control signals are output, the board can be connected to the system under development for easy debugging.

[ Components of Renesas Starter Kit for RX ]

  • CPU board
  • On-chip debugging emulator E1
  • Evaluation version of C/C++ Compiler Package for RX Family (incl. Simulator)
  • Evaluation version of the flash programmer software
  • Integrated Development Environment (differs depending on the package)


Renesas Starter Kit for RX



C/C++ Compiler for RX Family
[IDE supported] Corresponding IDE is e²studio e² studio, Corresponding IDE is CS+ CS+, Corresponding IDE is High-performance Embedded Workshop High-performance Embedded Workshop
Learn more about this product
Download free evaluation version


  • Package includes compiler, assembler, optimizing linker, cycle accurate simulator, and stack analysis tool
  • Conformance with ANSI C89 and C99 standards (except for variable-length arrays)
  • Easy porting of program code for earlier MCUs (setting option to assimilate language specifications, checking/notification of specific extended specifications, endian switching)


Simulator for RX Family (Included in Compiler)
[IDE supported] Corresponding IDE is e²studio e² studio, Corresponding IDE is CS+ CS+, Corresponding IDE is High-performance Embedded Workshop High-performance Embedded Workshop
Learn more about this product
Download free evaluation version


  • Support for debugging similar to actual system even without target board
  • Cycle accurate simulator for high-precision debugging


Real-time OS

Real-time OS for RX Family

  • Conformance with industry-standard µITRON4.0 specification (RI600PX includes memory protection functionality)
  • Compact design suitable for implementation in ROM
  • Automatic selection of only required modules during linking for a more lightweight system
  • GUI configurator to facilitate building the kernel
  • Interoperates with e² studio * and CS+ to support automatic setting of options required to build the OS and display of the state of objects managed by the OS such as masks and semaphores.

  • * Renesas real-time OS supported by e² studio is only for RI600V4.


OS aware debugging on High-performance Embedded Workshop

RX Family Real-time OS Lineup

  • RI600PX
  • [IDE supported] Corresponding IDE is CS+ CS+
    A real-time operating system for the RX600 Series, RX200 Series conforming to the µITRON4.0/PX-specification for Protect Function Extension.
    Learn more about this product

  • Partner OS Aware Debugging Plug-in
  • [IDE supported] Corresponding IDE is e²studio e² studio, Corresponding IDE is CS+ CS+
    e² studio and CS+ supports each Partner OS Application's task level debugging.

  • Learn more about corresponding Partner OSes and OS Aware Debugging Plug-in
  • For e² studio
    For CS+

[Note] RI600V4, RI600PX, RI600/4 and RI600/PX real-time OSes are not generally promoted in the U.S. and Europe. For customers in the U.S. and Europe who are interested in these products, please contact our regional marketing departments for details.



Middleware and Software Library for RX

  • Extensive lineup for RX applications including display, file system, network, audio and security functions
  • Flexible support for RX Family products with common interface settings
  • Sample program code included. Highly efficient design enabling rapid progress to the finished product

*The library can be used with both CS+ and High-performance Embedded Workshop, but the sample program included in the library is compatible with High-performance Embedded Workshop only.
* The target devices, IDE support and development status of Middleware differ depending on the products.
Click on each product from the following RX Middleware Lineup List for details.

[ RX Middleware Lineup ]

Signal Processing / Numerical Libraries




  • MP3 decoder 1



File Systems

Memory Drivers

  • MultiMedia Card driver
  • Serial EEPROM driver
  • Data flash driver 2
  • Serial flash driver
  • Renesas SPI Serial EEPROM Driver
  • Renesas I2C Serial EEPROM Driver 3
  • I2C Single Master Driver 3
1. Under development or planning
2. Under consideration for RX100 Series
3. The Application Notes and Sample Code for the RX111 can be downloaded from HERE.


Application Notes and Sample Code [ Application Notes and Sample Code ]
Free download sample code for RX

Renesas provides sample programs with documentation describing how to use microcontroller peripheral functions as well as system examples.

  • A large number of sample code packages for RX are available online for you to download.
  • Most sample programs include source code and register definition files are also available in the source program.
  • This code can significantly contribute to shortening the time to market for product development.

The sample code has been written to make development quick and easy and can be downloaded for use from HERE.


Coding Assistance

Code Generator Plug-in
[IDE supported] e²studio e² studio, CS+ CS+
*: Some RX200 and RX600 Series MCUs are supported by Peripheral Driver Generator (a free tool), which operates independently of the integrated development environment.
Learn more about this product

  • Simple operation of all processes through an easy-to-understand GUI
  • Handles checking for cases where multiple peripheral modules are contending for the same pins
  • An API provides functions to make the peripheral functions operate.
  • Since this tool is included in the CS+ and e² studio integrated development environments from Renesas, all processes from editing and building code to debugging can be smoothly executed from the same integrated environment.

Automatically generate control programs for peripheral modules.



All emulator products include the integrated development environment and an emulator-debugger that runs under it.

[ E2 Lite, E1 and E20 On-Chip Debugging Emulators ]
[IDE supported] Corresponding IDE is e²studio e² studio, Corresponding IDE is CS+ CS+, Corresponding IDE is High-performance Embedded Workshop High-performance Embedded Workshop

  • Easy connection. Allows debugging of an RX MCU while mounted on the system board.
  • Powered by USB bus. No dedicated power supply needed.
  • Also functions as a flash programmer. *1
  • Environmentally friendly: All materials in components and packages are RoHS compliant.
  • On the RX64M or RX71M Group, a coverage function is also provided when used in combination with the E20 emulator.
  • In the E20 emulator, debugging without the need for dedicated user pins can be accomplished using the debug MCU board, sold separately. *2
  • *1. The flash programmer support by E2 Lite is under development.
  • *2. The support availability differs on the MCU type.
E2 emulator Lite
E2 emulator Lite
Learn more
Compatible with E1 emulator and more economical price. Suitable for the whole range from professional development to hobbyist projects and education.
* Supported IDE is only e² studio.
E1 emulator
E1 Emulator
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Basic debugging functions at an affordable price. Also provides on-chip trace function.
E20 emulator
E20 Emulator
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More fully featured than the E1. Enables more advanced debugging with more powerful trace functions, real-time RAM monitoring, and more. (For RX600 or RX700 Series)

[ Graphical display of function information and variable information. CS+ analysis graph function ]

With the E1 and E20 emulators, CS+ is able to display virtual oscilloscopes on the monitor that show the changing values of variables as a program runs. This allows you to monitor changes in analog signals, as is required for sensor and similar applications, during program development. Times taken to run functions, proportions of the overall execution time, and call graphs can also be used to identify high-load processes and provide an efficient way to boost the performance of the system as a whole.

Conceptual view of analysis graphs

[ E20 Debug MCU Board for Debugging that Leaves User Pins Free ]
With an on-chip debugger, some user pins must be used for connections to the debugger. A debug MCU board, in contrast, leaves all the user pins free while enabling the full functionality of the E20. There are also high-capacity trace and real-time RAM monitoring functions that work even with MCUs that have no trace signals.

Debug MCU Board for E20


Flash Programming Tools

On-board Programming Software
Renesas Flash Programmer
Learn more about this product
Download free evaluation version


  • PC-controlled programming via the E1, E20, a serial or USB connection
  • Support for two types of programming operation modes (basic mode and full mode)
  • Support for automated programming using scripts
  • Support for programming unique codes


Renesas Flash Programmer


Flash programmer
Learn more about this product
Download the latest Programming GUI, Firmware, FPGA data and Parameter File


  • Standalone programming
  • PC-controlled programming using dedicated GUI
  • Ability to store settings for up to eight programming environments
  • Designed specifically for use on production lines (command control or remote control)
  • Support for programming unique codes




Third-Party Partner Solutions

Third-party tool vendors are also introducing a succession of compilers, emulators, programmers, and other products for the RX Family. This range of products meets a wide variety of requirements.





1. Under development


Click HERE for more details on the Alliance Partner Program.

Firmware Integration Technology

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