1. A method for transmitting data on a bus with minimization of the bus switching activity, comprising the steps of: converting the datum to be transmitted from its own original format into a transmission format that reduces the bus switching activity, said step of converting including: swapping the position of one or more bits of the datum to be transmitted, said swapping being performable according to a plurality of different variants, each of which is identified by a respective sorting pattern; and selecting, between the various sorting patterns, a sorting pattern that reduces the bus switching activity upon transmission on the bus of the datum generated using said selected sorting pattern; transmitting on the bus the datum in said transmission format; transmitting on the bus the selected sorting pattern (P t ); receiving the datum in said transmission format; receiving the selected sorting pattern transmitted on the bus; and converting the datum received from said transmission format to said original format using the selected sorting pattern received.