When modelling architecture of complex embedded systems proper architecture languages and tools are necessary. UML [1] has become a proven and well accepted design language to express system as well as software architecture. For definition of internal behavior of components composed and specified during software design, Simulink is commonly used, especially for automotive and aerospace applications. As common practise, code is generated directly from such behavior models. Therefore, code generators such as TargetLink [2] are used. In this paper we propose a UML profile to describe specific properties necessary to adapt UML models to the code generator TargetLink.