A System on Chip (SoC) usually has many functional blocks to deal with communication either on chip or the the external environment. For on chip communication the Advanced Microcontroller Bus Architecture is a common bus architecture. For more complex many core devices Network On Chip (NoC) protocols are adopted for communication between various components. For off chip communication there are a broad variety of serial and parallel protocols and connection methods using a variety of media such as wireless, wired and optical which are suited to the specific SoC application.