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US 2010/0165692 A1Published application
Variable memory refresh devices and methods
AssigneeMicron Technology, Inc.
InventorJoe M. Jeddeloh
Life of this patent
Estimating the term…
Abstract
Memory devices and methods are described such as those that monitor and adjust characteristics for various different portions of a given memory device. Examples of different portions include tiles, or arrays, or dies. One memory device and method described includes monitoring and adjusting characteristics of different portions of a 3D stack of memory dies. One characteristic that can be adjusted at multiple selected portions includes refresh rate.
Claims24
A memory device, comprising:
- a number of memory cells within a stacked memory array;
- logic coupled to the number of memory cells;
- a memory map to be used by the logic region to selectively refresh different portions of the number of memory cells at respective refresh rates.
A memory device, comprising:
- a stack of memory dies;
- a logic die to manage refresh rates in the stack of memory dies, wherein the logic die is attached to the stack of memory dies;
- a memory map located in the logic die and used to refresh different portions within the stack of memory dies at different refresh rates.
A method of operating a memory device, comprising:
- using a memory map generated using operational data from a number of different portions of a memory device to refresh a first portion of the memory device at a first refresh rate greater than zero;
- and
- using the memory map to refresh a second portion of the memory device at a second refresh rate greater than zero and different from the first refresh rate.
Dependencies are inferred from the claim text.