US Patent 11748274 Banked memory device storing hamming weight

A memory device includes a memory array and a memory controller. The memory array includes a first memory bank, a second memory bank, and a third memory bank. The first memory bank includes a first sub memory bank. The second memory bank includes a second sub memory bank. The memory controller, according to a write command from a host, writes first data from the host to the first memory bank and second data to the second memory bank at the same time, and writes a first Hamming weight of the first data to the third memory bank. The second data is the inverse of the first data.