The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 2009
Filed:
Feb. 27, 2007
Fumio Hara, Higashikurume, JP;
Shigemasa Shiota, Tachikawa, JP;
Hiroyuki Goto, Higashimurayama, JP;
Hirofumi Shibuya, Matsuda, JP;
Fumio Hara, Higashikurume, JP;
Shigemasa Shiota, Tachikawa, JP;
Hiroyuki Goto, Higashimurayama, JP;
Hirofumi Shibuya, Matsuda, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
The present invention provides a memory device that can flexibly decide the data to be preread. The memory device according to the present invention includes: a nonvolatile memory; a buffer memory having a higher access speed than the nonvolatile memory; and a control circuit. The control circuit creates a preread data management table that associates a logical address of preread data specified by a preread command inputted from the outside and a buffer memory address for storing the preread data. Moreover, the control circuit reads data specified by the command from the nonvolatile memory and stores it in the buffer memory as preread data. When a logical address specified in a read command inputted from the outside matches a logical address associated by the preread data management table, the control circuit outputs corresponding preread data from the buffer memory.