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:
Mar. 15, 2016
Filed:
May. 29, 2015
Hitachi, Ltd., Tokyo, JP;
Seiji Miura, Hachioji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A control circuit of a semiconductor device (memory module) realizes long life and others by a mechanism that suppresses and smoothes variations in use of a memory by equalizing the sizes of data write and data erase with respect to a data write request and sequentially allocating and using addresses of the memory in data write to an overwritable non-volatile memory device without carrying out an overwriting operation even in the case of an overwrite request. The control circuit realizes data write by a set of two types of operations of (a) an operation of erasing data of a first address or an operation of setting a flag value to an invalid state and (b) an operation of writing data to a second address different from the first address or an operation of setting a flag value to a valid state.