| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress the amount of electric power expended during a data saving operation from a volatile memory to a nonvolatile memory to reduce the supply power required for the data saving operation. <P>SOLUTION: In a memory controller that controls data transfer between a volatile memory and a nonvolatile memory, wherein data being held in a plurality of volatile memories each having a refresh operation mode and a self-refresh operation mode is transferred to the nonvolatile memory. When readout of data from at least one volatile memory is finished, the volatile memory is shifted from the refresh operation mode to the self-refresh operation mode. Then, control is performed to return the volatile memory from the self-refresh operation mode depending on the progress of writing of data to the nonvolatile memory. <P>COPYRIGHT: (C)2011,JPO&INPIT |
