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US 8,797,818 B2Granted
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.
Claims17
A memory device, comprising:
- a number of memory cells within a stacked memory array;
- a logic die to manage refresh rates in the stacked memory array;
- and
- a tracker to track a power down state for different portions, wherein the tracked power down states are used to refresh different portions within the stacked memory array at different refresh rates.
1 more element
A memory device, comprising:
- a number of memory cells within a stacked memory array;
- a logic die to manage refresh rates in the stacked memory array;
- and
- an error tracker to track an error rate for different portions, wherein the tracked error rate is used to refresh different portions within the stacked memory array at different refresh rates.
1 more element
A memory device, comprising:
- a stack of memory dies;
- a logic die to manage refresh rates in the stack of memory dies;
- and
- a memory map generated by sensed data from operation of the number of memory cells, to refresh different variable sized portions within the stack of memory dies at different refresh rates.
1 more element
Dependencies are inferred from the claim text.