Deep neural networks (dnn) hardware accelerator and operation method thereof

An operating method of a DNN hardware accelerator including a processing element array, the processing element array comprising a plurality of processing element groups and each of the processing element groups comprising a plurality of processing elements, the operating method comprising:

• receiving input data by the processing element array;
• transmitting the input data from a first processing element group of the processing element groups to a second processing element group of the processing element groups in a first network connection implementation;
• and
• transmitting data between the processing elements in the first processing element group in a second network connection implementation,
• wherein, the first network connection implementation is different from the second network connection implementation.