| 摘要 |
A nonvolatile storage apparatus which is not deadlocked even if a data processing section gets out of control during a power-on reset is provided. The nonvolatile storage apparatus includes a first semiconductor device having a data processing section capable of executing instructions and an external interface section, and a second semiconductor device controlled by the first semiconductor device. The external interface section, upon detecting that an operating supply voltage supplied from outside the nonvolatile storage apparatus has reached or exceeded a prescribed voltage, responds to an initialization command supplied from outside the nonvolatile storage apparatus and makes the data processing section start reset exception processing. After the reset exception processing is completed, the external interface section does not respond to the initialization command. When a prescribed state is reached during the reset exception processing, the external interface section again responds to the initialization command and makes the data processing section start the reset exception processing. The prescribed state is a state in which, during the reset exception processing, the data processing section has become or is anticipated to become out of control.
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