| abstract |
(57) [Problem] To provide an easy-to-use semiconductor memory that automatically executes a refresh operation internally. A plurality of first memory blocks and a second memory block for reproducing data of the first memory block are formed. When a read command and a refresh command conflict with each other, the read control circuit accesses the first memory block according to the refresh command and reproduces read data using the second memory block. When a write command and a refresh command conflict, the write control circuit operates the memory blocks in the order in which the commands are received. Therefore, the refresh operation can be automatically performed without making the user aware. That is, a semiconductor memory that is easy to use for the user can be provided. |