| 摘要 |
An apparatus for estimating a frequency of access to a storage device that includes a flash memory and a controller for controlling the flash memory includes interface. Data is written into the flash memory in units of a page and being erased from the flash memory in units of a block consisting of pages. The interface is supplied with an internal signal transferred between the flash memory and the controller, configured to recognize the internal signal, and outputs the internal signal as an input signal. An erasure sequence detection section outputs a detection signal when address data is followed by an erasure command requesting erasure of data in the block specified by the address data in the input signal. An address holding section holds address data in the internal signal, and outputs held address data as erasure address data when supplied with the detection signal.
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