- Renesas Technology Corp. designers turned to OpenAccess to address the major design challenges with systems on chip for the automotive, wireless, digital consumer and industrial markets. OpenAccess provides Renesas with an industry standard database that has the capacity and performance needed for today's largest designs. The C++ API (C++ Application Programming Interface) facilitates fast access to a unified data model for both logical and physical design. It enables an efficient level of access to the data model to integrate tools developed in-house with commercially available tools for translation free interoperability.