Patent ID: 7433245
Filing Date: 2008-10-07
Classification: G06F,G06K

Abstract:
1. A memory card comprising: a flash memory; an external interface unit operable to transfer data to and from a host apparatus; a storage unit that prestores a predetermined writable block size; and a controlling unit operable, when receiving through the external interface unit a write command which specifies a write block size, to (a) judge whether the write block size satisfies a predetermined condition in relation to the writable block size and (b) perform a control operation concerning whether to permit writing of data into the flash memory according to a result of the judgment, wherein the writable block size is a predetermined integral multiple of a size of an erase block in the flash memory, wherein the predetermined condition is that the write block size is an integral multiple of the writable block size, and wherein the controlling unit performs the control operation to write data into the flash memory only if the predetermined condition is satisfied.