A method performed by a control unit in an array of multiple self-addressable control units arranged in at least two dimensions involves obtaining information to be used to determine a self-address, determining a self-address value based upon the information, storing the determined self-address value, based upon the self-address value, specifying first data to be provided to a next self-addressable control unit in a first group of self-addressable control units for a first dimension of the array, providing the first data to the next self-addressable control unit in the first group, based upon the self-address value, specifying second data to be provided to a different self-addressable control unit in a second group of self-addressable control units for a second dimension of the array different from the first dimension of the array, and providing the second data to the different self-addressable control unit in the second group.