US 11,868,224 B2
Memory sub-system data retention via refresh
Nicholas T. Heath, Pittsboro, NC (US)
Assigned to Micron Technology, Inc., Boise, ID (US)
Filed by Micron Technology, Inc., Boise, ID (US)
Filed on Aug. 31, 2021, as Appl. No. 17/462,442.
Prior Publication US 2023/0062129 A1, Mar. 2, 2023
Int. Cl. G06F 11/00 (2006.01); G06F 11/30 (2006.01); G06F 3/06 (2006.01); G06F 1/30 (2006.01)
CPC G06F 11/3037 (2013.01) [G06F 1/30 (2013.01); G06F 3/0619 (2013.01); G06F 3/0659 (2013.01); G06F 3/0679 (2013.01); G06F 11/3058 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method, comprising:
providing, when delivery of power to a memory sub-system comprising a plurality of non-volatile memory components from a main power supply is interrupted, power from an auxiliary power supply to a portion of a controller interfacing with the non-volatile memory components to:
responsive to a prediction, generated when the delivery of the power from the main power supply to the memory sub-system is interrupted, that a particular portion of the plurality of non-volatile memory components will experience an impending data loss event, perform a targeted refresh operation of data stored in the particular portion; and
when the delivery of the power to the memory sub-system from the main power supply is interrupted, the power from the auxiliary power supply supplies power to a processing device of the memory sub-system to:
monitor a characteristic of the memory sub-system associated with data retention at the plurality of non-volatile memory components when the delivery of the power to the memory sub-system from the main power supply is interrupted; and
generate, based on the monitored characteristic, the prediction that the particular portion of the plurality of non-volatile memory components will experience the impending data loss event by comparing the monitored characteristic to a threshold value of the monitored characteristic associated with the data loss event.