IAR Embedded Workbench for Renesas M32C

The complete development toolchain IAR Embedded Workbench for Renesas M32C provides one toolbox in one view, giving you one uninterrupted workflow.


User-friendly IDE

Integrated development environment with project management tools and editor. Included is automatic checking of MISRA C rules (MISRA-C:2004), configuration files for all devices in M32C and M16C/8x families, linker and library tools as well as example projects and code templates.


Powerful build tools

The IAR C/C++ Compiler is a highly optimizing C and C++ compiler for M32C. Included is also run-time libraries and a relocating R32C assembler.


Comprehensive debugger

The C-SPY Debugger with M32C simulator is included. It provides support for RTOS-aware debugging on hardware as well as support for Renesas PC7501 emulator and Renesas E8 on-chip debug (OCD). Included is also RTOS-aware debugging with built-in plugins for several partner solutions.


On-demand training included

When you buy a license of IAR Embedded Workbench for Renesas M32C, you get access to free training courses through our IAR Academy on Demand offering.

Latest releases

We are constantly updating and refining our tools with new features, new device support and extended capabilities.

Version 3.30

E8a debugger improvements

Support for new devices, possibility to watch variables during program execution, and support for new breakpoint types are some of the improvements in the C-SPY driver for the Renesas E8a emulator.

Downloading multiple images with C-SPY

C-SPY is now able to download multiple images/applications at the same time.

Debug without downloading

The debugger can now be started with or without downloading code, using two new buttons on the toolbar and two new Project menu entries.

Edit breakpoints

When the context menu is opened from a row with one or more breakpoints, an entry Edit Breakpoint is now available. This will open the Edit Breakpoint dialog box that previously was available only from the Breakpoint window.

MISRA-C:2004 support

IAR Embedded Workbench now supports automatic checking of source code for conformance to the MISRA-C:2004 standard.

Auto refresh in Memory window

The C-SPY Memory window now has two new buttons on the toolbar. One button refreshes the window once and one button activates periodical refreshing of the window as long as the debugger is running.

Symbols debugger window

A new Symbols debugger window has been added. It displays the complete list of symbols used within the project including symbols from libraries and assembler labels.

Checksumming of segments by name

It is now possible to specify the name of a segment in a checksum command.

Updated device support

SFR header files, linker command files and device description files have been added for the latest Renesas devices.

IAR Visual State build integration

IAR Visual State design projects can now be included in an IAR Embedded Workbench project. This enables the code generation facility of IAR Visual State to be run automatically when needed as part of the normal IAR Embedded Workbench build chain.

IDE improvements

  • Multi-file compilation support
  • User-selectable background color in the text editor
  • If there is an external text editor, it is automatically disabled during debugging.

Information Center

An integrated navigation system that gives easy access to tutorials, product documentation, and example projects.

Read complete release notes

Version 3.20

  • PC7501 emulator support
  • E8 emulator support
  • ROM-monitor and hardware breakpoints
  • Updated device support
  • OSEK Run Time Interface (ORTI) support
  • embOS and Micriµm µC/OS-II RTOS plugins
  • Trace window
  • Stack window
  • New breakpoint category - Log breakpoint
  • New way to toggle breakpoints
  • Smart display of STL containers at debugging
  • Integration with source code control systems
  • Editor features

What type of license do you need?

Our tools are available in a flexible license model to suit your company needs. Together with our support and update agreements, you get the support you need in multiple time zones and multiple languages. Send a request for quote or contact sales to get started.

Read more about Licenses

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User guides and documentation

Languages and standards

The IAR C/C++ compilers offer different dialects of the C and C++ programming languages, as well as different extensions specific for embedded programming (please note that not all language standards are supported for all target implementations). The compiler can be instructed to disable extensions for strict conformance to the standards. 

A wide range of industry-standard debug and image formats compatible with most popular debuggers and emulators are supported. This includes ELF/DWARF where applicable.

ISO/ANSI C/C++ Compliance

The IAR C/C++ compilers adhere to a freestanding implementation of the following C programming language standards:

  • INCITS/ISO/IEC 9899:2018, known as C18 (Latest version only).
  • The compiler supports all C++17 features. The C++ library supports C++14 with no C++17 additions.  (Latest version only).
  • ISO/IEC 14882:2015, known as C++14
  • INCITS/ISO/IEC 9899:2012, known as C11
  • ANSI X3.159-1989, known as C89

The ISO/ANSI C/C++ Compliance level varies between the different compilers. For complete information, please refer to the IAR C/C++ Compiler user documentation in your chosen product.

IEEE 754 standard

IAR Embedded Workbench supports the IEEE 754 standard for floating-point arithmetic.


MISRA C is a software development standard for the C programming language developed by MISRA, The Motor Industry Software Reliability Association. Its aims are to facilitate code safety, portability and reliability in the context of embedded systems, specifically those systems programmed in ISO C.

The first edition of the MISRA C standard, "Guidelines for the use of the C language in vehicle based software", was produced in 1998. In 2004, a second edition was produced with many substantial changes to the guidelines, including a complete renumbering of the rules. Additionally MISRA C:2012 with extended support and MISRA C++:2008 for identifying unsafe code constructs in the C++ standard have also been added to the standards.

IAR Embedded Workbench features an add-on product C-STAT so you can check compliance with rules as defined by MISRA C:2004, MISRA C++:2008 and MISRA C:2012.

Test validation

We use the following commercial test suites to test conformance of our tools to the standards:

  • Plum Hall Validation test suite for ISO/IEC C conformance
  • Perennial EC++ Validation Suite for C++ conformance
  • Dinkum C++ Proofer to test how our libraries conform to the C and C++ standard as well as test our STL implementation against the C++ standard.

In addition to the commercial suites, we use several in-house test suites for testing new features, regression testing, corrected errors, etc.

Download free trial

IAR Embedded Workbench for Renesas M32C - Free trial version

The evaluation license is completely free of charge and allows you to try the software to evaluate its efficiency and ease of use. You can choose either a 14-days trial version or a size-limited version.

When you click download, you will be asked to register to get your license.

Please note the following for the 14-day time-limited version:

  • Time limit for evaluation license is 14 days
  • Must not be used for product development or any other kind of commercial use.
  • Source code for runtime libraries is not included
  • No support for MISRA C.
  • Limited technical support.
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