Micron Technology Incorporated

Gregg D Wolff

Christopher Gordon Wieduwilt

Randall J Rooney

Christian N Mohr

Dennis G Montierth

C Omar Benitez

Methods, systems, and apparatuses related to detecting and reporting failures for a memory device are described. When a count of bit-flip errors is above a fail threshold, a memory device can report a failure. Failure reports can indicate a rate at which the memory device is accumulating errors. An offset fail threshold may be applied instead of a default fail threshold, such as a standardized or specified threshold. The offset fail threshold can be a summation of the default fail threshold and an offset determined from an initial error count determined before the memory device has accumulated errors from use.

Normalization of detecting and reporting failures for a memory device

An apparatus may include a memory array, a test circuit coupled to the memory array, a counter circuit coupled to the test circuit and an input/output (I/O) circuit coupled to the counter circuit. During a test operation, the test circuit may receive blocks of data from the memory array and compare the data to detect errors in the blocks of data. The counter circuit may increment a count value in response to detection of an error by the test circuit, and the I/O circuit may provide the count value to an output. The test circuit may also provide test comparison data based on the received blocks of data, and the I/O circuit may provide one of the count value and the test comparison data to the output.

System and method for counting fail bit and reading out the same

Apparatuses and methods for distributing row hammer refresh events across a memory device is disclosed. In one embodiment, the present disclosure is directed to an apparatus that includes a first memory configured to receive a sequential series of refresh commands and to replace a first of the sequential refresh commands with a row hammer refresh operation once during a refresh steal cycle, a second memory configured to receive the sequential series of refresh commands at to replace a second of the sequential refresh command with a row hammer refresh operation once during a refresh steal cycle, wherein the first of the sequential refresh commands and the second of the sequential refresh commands are different commands.

Apparatuses and methods for distributing row hammer refresh events across a memory device

Cache mode for word lines where the cache mode utilizes an internal timer for a memory cell to disable connection of a voltage to a transistor of a word line driver of the memory cell before an end of a specified end of period. By early disconnection, the local controls of the memory cell may provide additional time to settle after disconnection of the voltage without interfering with operations (e.g., read, write, activate) of the memory cell, since the internal timer may be programmed to be greater than or equal to a worst case scenario for the operations.

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Boise, ID, United States of America

Gregg D Wolff