Back to results
US 8,274,855 B2Granted
Semiconductor device for performing a refresh operation
AssigneeElpida Memory, Inc.
InventorsTetsuaki Okahiro, Hiromasa Noda, Katsunobu Noguchi
Life of this patent
Estimating the term…
Abstract
A semiconductor device according to the present invention has an address scrambling circuit for performing address scrambling operation of an address and a redundancy judging circuit for judging that redundancy judgment is performed about the address scrambled by the address scrambling circuit. This structure makes it possible to completely refresh operation concerned with normal word lines and redundancy word lines.
Claims20
A semiconductor device comprising:
- a first memory bank including a plurality of first memory mats, each of the first memory mats including a plurality of memory cells;
- and
- a first address circuit receiving address information, the first address circuit selecting, in a normal mode, a first one of the first memory mats in the first memory bank in response to a first content of the address information and selecting, in a refresh mode, a second one of the first memory mats in the first memory bank in response to the first content of the address information, the first and second ones of the first memory mats being different from each other.
Dependencies are inferred from the claim text.