| 摘要 |
PROBLEM TO BE SOLVED: To provide a memory system configured to stabilize response time with respect to a data write request from a host device.SOLUTION: The memory system includes: a nonvolatile semiconductor memory which can be connected to a host device, and is configured so that data are written by page size, and erased by block size which is a natural number of 2 or more and is a unit of the page size; and a controller which controls data write processing of writing data to the nonvolatile semiconductor memory and data erasure processing of erasing data from the nonvolatile semiconductor memory, according to a command received from the host device. The controller controls the nonvolatile semiconductor memory to erase data of 1 block during writing data of N pages (N is a natural number of 2 or more) on the nonvolatile semiconductor memory, according to a command received from the host device. 1 block is erased by N erasure operations.SELECTED DRAWING: Figure 1 |
