CS+
Tokyo, Japan
What it is
CS+ is Renesas's integrated development environment for creating software for Renesas microcontrollers. The IDE is free for development and production, while evaluation compiler packages may impose limits. CS+ for CC targets RL78, RH850, and RX families; CS+ for CA,CX covers RL78, 78K, and V850 families. Its installer includes compiler packages for target products, and compatible Renesas emulators can provide debugging. A GUI can generate C device-driver programs for supported MCU peripherals, although not every MCU offers that feature. Modified or saved source files build automatically in the background, and action events can display a variable value at a specified address. Smart Browser for CS+ for CC presents device details, hardware manual content, sample code, and related FAQs. CS+ can work with Smart Configurator for RX and connect to MATLAB and Simulink through a co-simulation tool. Current listed versions run on Windows 10 64-bit and Windows 11; 32-bit operation requires IDE V8.06 or earlier. Debugging emulators are sold separately. Renesas provides online communities, a knowledge base, and ticket support for technical or confidential questions.
For and against
For
- IDE is free for development and production.
- Background builds modified or saved files.
- Includes GUI C code generation on some MCUs.
- Online communities and technical ticket support are available.
Against
- Evaluation compiler packages may impose limits.
- Compatible debugging emulators are sold separately.
- Current versions list Windows 10 64-bit and Windows 11.
- Regional promotion is limited in the U.S. and Europe.
The verdict
CS+ offers Renesas MCU development tools, with features varying by product variant and target device. Check target-family coverage, operating-system requirements, and compiler evaluation limits before choosing it.
Who it suits
CS+ is for developers building software for supported Renesas MCU families. It may suit users who want an IDE with background builds and emulator-based debugging.
Plans and prices
CS+ for CA,CX
IDE is free · compiler evaluation editions may restrict object size or available memory
Read 3 Oct 2026 · renesas.com
CS+ for CC
IDE is free for development and production · compiler evaluation limits apply when using an evaluation compiler
Read 3 Oct 2026 · renesas.com
On the record
- Build and debug
- CS+ automatically builds modified or saved source files in the background and supports action events that display variable values at a specified address.renesas.com · read 3 Oct 2026
- Code generation
- Its GUI can generate C device driver programs for MCU peripheral functions, though some MCUs do not support this feature.renesas.com · read 3 Oct 2026
- Emulators
- Compatible debugging emulators are sold separately; listed models include IECUBE, IE850, IE850A, E2, E2 Lite, and E20.renesas.com · read 3 Oct 2026
- Evaluation distinction
- CS+ itself has no evaluation edition; evaluation compiler packages have their own periods and limitations, while the IDE product is available for free.renesas.com · read 3 Oct 2026
- Included tools
- The CS+ installer includes compiler packages for target products, and compatible Renesas emulators can provide debugging functions.renesas.com · read 3 Oct 2026
- Integrations
- CS+ can interoperate with Smart Configurator for the RX family, and Renesas offers a co-simulation tool linking CS+ with MATLAB and Simulink.renesas.com · read 3 Oct 2026
- Operating system
- The listed operating environment for current CS+ versions is Windows 10 64-bit and Windows 11; 32-bit use requires CS+ IDE V8.06 or earlier.renesas.com · read 3 Oct 2026
- Purpose
- CS+ is an integrated development environment and coding tool for developing software for Renesas MCUs.renesas.com · read 3 Oct 2026
- Regional availability
- Renesas says CS+ is not generally promoted to customers in the U.S. and Europe and directs interested customers there to regional marketing departments.renesas.com · read 3 Oct 2026
- Security feature
- Main-core debugging supports developing user programs while keeping secure information confidential from engineers working on non-secure programs.renesas.com · read 3 Oct 2026
- Smart Browser
- For CS+ for CC, Smart Browser displays device information, hardware manual content, sample code, and related FAQs.renesas.com · read 3 Oct 2026
- Support
- Renesas offers online support communities, a knowledge base, and ticket submission for technical questions or confidential information.renesas.com · read 3 Oct 2026
- Target families
- CS+ for CC supports RL78, RH850, and RX families, while CS+ for CA,CX supports RL78, 78K, and V850 families.renesas.com · read 3 Oct 2026
