A data processor apparatus and memory interface comprises a memory, a plurality of processor units couplable to receive data from the memory, and control means for controlling transmission of data from the control means to each processor unit. The control means for controlling operations of the data processor units is arranged to transmit data intended for each processor unit (i.e. broadcast data) to the memory, and is adapted to control each processor unit to receive the broadcast data from the memory. This arrangement eliminates the need for a dedicated broadcast bus from the array controller to each PU, which thereby enables the area/space required to accommodate the data processor to be significantly reduced.