Memory apparatus and memory access restricting method
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 10, 2004
Grant Date -
Apr 4, 2002
app pub date -
Sep 28, 2001
filing date -
Sep 29, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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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