Memory device, memory system having the same and operating method thereof

A memory device comprising:

• an access count table configured to store an access count value for each of a plurality of target row addresses;
• a victim point table configured to store a victim point value for each of the plurality target row addresses and row addresses adjacent to the plurality of target row address;
• and
• a processing-in-memory (PIM) module configured to, based on a row address being received from an external device, calculate a new victim point value based on access count values of the access count table and victim point values of the victim point table.

A memory system comprising:

• at least one memory device;
• and
• a memory controller configured to:
• control the at least one memory device, and
• issue a refresh management command based on an accumulated command value,
• wherein the at least one memory device is configured to perform a target refresh operation based on a victim point table in response to the refresh management command, and
• wherein the victim point table is configured to store victim point values for target row addresses and row addresses adjacent to the target row addresses.