Embedded systems based on small cheap microcontrollers surround all aspects of our lives. Due to inherent concurrency microcontroller software can exhibit complex behavior that is best specified using specialized programming langauges. The IndustrialC language has been successfully used in a number of embedded appications and has proven useful for specification of complex reactive systems within the constrained computational capabilities of 8-bit microcontrollers. Many microcontroller-based systems are considered safety-critical and the safety of microcontroller software can only be assured using formal verification methods such as deductive verification and model checking. These methods require programming language semantics to be specified formally and unambiguously, yet the nature of microcontroller programming is such that program semantics differs even between CPU architectures and chip models. We present a translational semantics for IndustrialC in application to AVR-family microcontrollers that uses AVR Libc as a denotational metalanguage along with plain C constructs and discuss the benefits and pitfalls of the approach.