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US 11,699,476 B2Granted
Apparatuses and methods for monitoring word line accesses
AssigneeMicron Technology, Inc.
InventorsJason M. Brown, Daniel B. Penney
Life of this patent
Estimating the term…
Abstract
An apparatus may include multiple memory devices. Each memory device may include multiple memory banks. Addresses of accessed word lines for a particular portion of memory and the number of times those word lines are accessed may be tracked by each memory device. When a memory device determines that an accessed word line is an aggressor word line, the memory device alerts other memory devices of the apparatus. The memory devices may then perform targeted refresh operations on victim word lines of the aggressor word line.
Claims20
An apparatus comprising:
- a plurality of memory devices, wherein at least one of the plurality of memory devices includes:
- a memory;
- and
- an aggressor row trigger configured to receive an alert signal provided by a different one of the plurality of memory devices, wherein the aggressor row trigger is configured to latch a current row address responsive to the alert signal.
1 more element
An apparatus comprising:
- a first memory device;
- and
- a second memory device comprising a refresh address generator configured to calculate a victim row address associated with an aggressor row address, wherein the aggressor row address is received from the first memory device.
A method comprising:
- receiving at a first memory device, an alert signal received from a second memory device, wherein the alert signal indicates detection of an aggressor row address;
- responsive to the alert signal, at the first memory device, calculating at least one victim row address associated with the aggressor row address;
- and
- refreshing at least one word line associated with the victim row address.
1 more element
Dependencies are inferred from the claim text.