LIN is a single-wire serial communications protocol based on the common SCI (UART) byte-word interface. UART interfaces as available as low cost silicon module on almost all micro-controller and can also be implemented as equivalent in software or pure state machine for ASICs. The medium access in a LIN network is controlled by a master node so that no arbitration or collision management in the slave nodes is required, thus giving a guarantee of the worst-case latency times for signal transmission. A particular feature of LIN is the synchronisation mechanism that allows the clock recovery by slave nodes without quartz or ceramics resonator.