| 摘要 |
When the power of a memory apparatus is turned on, data written to a designated area of a memory of the memory apparatus is loaded to a register. When an initial state detecting portion has detected that data loaded to the register is an initial value, a gate G0 is turned on. As a result, a designated area and a hidden area become accessible. When data that is different from the initial value is written to the designated area, the designated area and the hidden area are access-restricted. When a used state detecting circuit has detected that the used capacity of the memory matches a setup value, the gate G0 is turned on. As a result, the hidden area becomes accessible. Hidden data prewritten to the hidden area is information rewarded to the user or advertisement/commercial information.
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