NEURAL PROCESSOR

A processing device comprises a first set of processors comprising a first processor and a second processor, each of which comprises at least one controllable port, a first memory operably coupled to the first set of processors, at least one forward data line configured for one-way transmission of data in a forward direction between the first set of processors, and at least one backward data line configured for one-way transmission of data in a backward direction between the first set of processors. wherein the first set of processors are operably coupled in series via the at least one forward data line and the at least one backward data line.