Processing-in-memory devices having multiplication-and-accumulation circuits

A processing-in-memory (PIM) device comprising:

• a first memory bank configured to store weight data comprised of elements of a weight matrix;
• a second memory bank configured to store vector data comprised of elements of a vector matrix;
• a buffer configured to store constant data;
• and
• a multiplication-and-accumulation (MAC) circuit configured to selectively perform at least one of:
• a MAC arithmetic operation of the weight data and the vector data and an element-wise multiplication (EWM) arithmetic operation of the weight data and the constant data,
• wherein the MAC circuit comprising:
• a MAC operator circuit configured to selectively perform the MAC arithmetic operation or the EWM arithmetic operation;
• and
• a data input circuit configured to provide the MAC operator circuit with the weight data, the vector data, and the constant data,
• wherein the MAC operator circuit comprising:
• a multiplication circuit including a plurality of multipliers;
• a data output selection circuit configured to receive output data of the plurality of multipliers and output the output data of the plurality of multipliers through first output lines or second output lines of the data output selection circuit;
• an accumulation circuit including a plurality of accumulators and configured to perform an accumulating calculation of data outputted from the data output selection circuit;
• and
• an adder circuit configured to perform an adding calculation of data outputted from the plurality of accumulators, and output total accumulation result data through an output terminal.