Memory access control apparatus and memory access control method

摘要

A memory is readable by page and erasable by block including a plurality of pages. After a read request to the memory is issued, a memory controller specifies all blocks which can be accessed based on an address specified by a read command, as candidate blocks, and specifies an inspection target page out of pages included in the candidate blocks on the basis of a predetermined rule. The memory controller inspects whether or not there is an error in the inspection target page.

主权项

1. A memory access control apparatus for controlling access to a rewritable nonvolatile semiconductor memory which is readable by page and erasable by block including a plurality of pages, comprising:
a read count memory configured to store a read count for said nonvolatile semiconductor memory by block; a specifying part configured to specify an inspection target page after a read request to said nonvolatile semiconductor memory is issued; and an inspection part configured to inspect whether there is an error in said inspection target page, wherein said specifying part includes: a candidate specifying part configured to specify all blocks which can be accessed based on an address specified by a read command, as candidate blocks; a block specifying part configured to specify a block whose read count is the highest among said candidate blocks as an inspection target block by referring to said read count memory; and a page specifying part configured to specify said inspection target page out of said inspection target block on the basis of a predetermined rule.