Abstract: A method (100) is disclosed for communicating data over a data communication bus (310) comprising a first conductor (312) and a set of further conductors (314). The method (300) comprises providing the first conductor (312) with a first signal transition (210) for signalling the start of a first data communication period (T1); and providing a further conductor (314), after a predefined delay with respect to the provision of the first signal transition (210), with a delayed signal transition (220), the predefined delay defining a first data value. Consequently, the method of the present invention provides a data encoding technique for data communication over a bus that requires less switching activity than other encoding techniques such as pulse width modulation encoding. The present invention further discloses a data communication device (400), a data reception device (500) and a system (300) including these devices, all implementing various aspects of the aforementioned method.