EXTERNAL MEMORY ACCESSING DMA REQUEST SCHEDULING IN IC OF PARALLEL PROCESSING ENGINES ACCORDING TO COMPLETION NOTIFICATION QUEUE OCCUPANCY LEVEL

An integrated circuit comprises an external memory, a plurality of parallel connected Vector Processing Engines (VPEs), and an External Memory Unit (EMU) providing a data transfer path between the VPEs and the external memory. Each VPE contains a plurality of data processing units and a message queuing system adapted to transfer messages between the data processing units and other components of the integrated circuit.