| 摘要 |
According to one embodiment, when a command has been detected, while data transfer is in progress, it is determined that the command has been unintentionally issued, and a mode move is limited. A control apparatus has a command decoder circuit, a data control circuit, a state control circuit which analyzes the content of the command, and then, controls states of the data control circuit and a memory unit, a detecting unit which detects a command indicating a state move, a data transfer state determining unit which, when the command has been detected, determines whether or not the data control unit is in data transfer, and a move mode setting unit which, when the data transfer state determining unit is in data transfer, moves an operating mode to an idle state.
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