This product is a C compiler for M32C/80 Series, M16C/80 Series and M16C/70 Series MCU. The powerful optimizations offer the ultimate in execution speed and code efficiency, and the utilities increase productivity. Furthermore, the MISRA C Rule Checker can also be purchased. It will help you write high-quality C source code.

Release Information

Latest Ver.: V.5.42 Release 00

Released: Apr 1, 2010

Details of upgrade (See Tool News)

Operating Environment

 Life cycle


  • This product is included in "C/C++ Compiler Package for R8C and M16C Families". This product is NOT available separately, but only included in the "C/C++ Compiler Package for R8C and M16C Families". To get a free upgrade version, download free updates from the Auto Update Utility or continue using separate on-line upgrade service as before.
  • "C/C++ Compiler Package for R8C and M16C Families 2011.04 " (released on 1 April, 2011) bundles C Compiler Package for M32C Series V.5.42 Release 00A which is identical in functionality with V.5.42 Release 00. If you purchase "C/C++ Compiler Package for R8C and M16C Families" , it comes with MISRA C Rule Checker SQMlint V.1.03 Release 00C (identical in functionality with V.1.03 Release 00B).


  • Integrated development environment High-performance Embedded Workshop
  • C compiler
  • Assembler
  • Linkage Editor
  • Load module converter
  • Librarian
  • Cross referencer
  • Absolute lister
  • Standard library
  • The SBDATA declaration & SPECIAL page Function declaration Utility
  • Simulator Debugger
  • Call Walker
  • MapViewer

Processing Flow

Installing this compiler package provides the following environment.

C compiler: NC308
Optimizing ANSI C compiler with extensions for embedded systems.
Assembler: AS308
Produces object code for the target MCU from assembly language source files.
Simulator debugger
Provides source level debugging capability in targetless system-level.
IDE (Integrated development environment): HEW (High-performance Embedded Workshop)
Provides seamless integration and easy access to all tools for coding, compiling, linking, and debugging. It greatly increases productivity.


Target Devices

  • M16C Family M32C/80 Series (32/16-bit)
  • M16C Family M16C/80 Series (16-bit)

Information supporting development tools

Title Description
My Renesas Create a My Renesas account to use our tool download services, receive e-newsletter/update notifications, and take advantage of our other services.
e-learning Information for studying and learning about microcontrollers and microprocessors.
FAQ Frequently asked questions and useful hints for development.
Forum A forum and community site to share technical information, questions and opinions with others who use Renesas MCU's.
Tool News Tool release information and other important information.
Operating Environment Information on system requirements and operating environment for the latest version of tools.
Info on Discontinued Products A list of Renesas software and tools that have been discontinued and are no longer being offered for new projects.