SEMICONDUCTOR MEMORY DEVICE EMPLOYING PROCESSING IN MEMORY (PIM) AND METHOD OF OPERATING THE SEMICONDUCTOR MEMORY DEVICE

A semiconductor memory device includes a plurality of memory bank groups configured to be accessed in parallel; an internal memory bus configured to receive external data from outside the plurality of memory bank groups; and a first computation circuit configured to-receive internal data (W0) from a first memory bank group of the plurality of memory bank groups; to-during a period of reception of the internal data (W0) from the first memory bank group , receive successively a first external data (A0) and a second external data (B0) through the internal memory bus and to-in said period, perform successively a processing in memory, hereinafter termed PIM, arithmetic operation (A0xW0) on the internal data and the first external data and the PIM arithmetic operation (B0xW0) on the internal data and the second external data.