1. A data processor chip comprising: a plurality of programmable data processing arrangements; a segmented bus system including a plurality of segments that are adapted for simultaneous transmission on at least two of the plurality of segments, and that are adapted for interconnecting the plurality of programmable data processing arrangements; at least one data cache arrangement that: is adapted for connection to the plurality of programmable data processing arrangements via at least a subset of the plurality of segments; and includes an arbiter adapted to select, for each of a plurality of data transmissions, at least one respective one of the plurality of segments for a respective connection to one or more of the plurality of programmable data processing arrangements; and at least one permanently implemented memory interface unit that is adapted for transferring data between the at least one data cache and; a higher level memory.