Memory controller comprising multiple buffer memories, and handling of read after write hazards

Abstract

A memory storage device includes: a memory controller configured to receive data from an outer device, and a nonvolatile memory connected to the memory controller, wherein the memory controller includes: a first buffer memory configured to store the data; a second buffer memory different from the first buffer memory; and a memory interface configured to provide the data provided from the first buffer memory to the nonvolatile memory, wherein the nonvolatile memory is configured to store the data, and provide a write done signal to the memory interface after storing the data, and wherein the memory controller is configured to copy the data stored in the first buffer memory to the second buffer memory in response to the write done signal, and remove the data stored in the first buffer memory after copying the data stored in the first buffer memory to the second buffer memory.