Patent ID: 9501343
Filing Date: 2016-11-22
CPC Classification: G06F,G11C

Claim Text:
1. A method of operating a non-volatile memory device including first buffer memory cells and main memory cells, the first buffer memory cells storing a first data, the main memory cells storing a second data, which is read from the first buffer memory cells, or a recovered first data, which is recovered from the second data through a correction process, the method comprising: reading data, which is stored in sample buffer memory cells included in the first buffer memory cells, as sample data when an accumulated number of read commands, which are executed on the non-volatile memory device, reaches a reference value; counting a number of errors included in the sample data based on an error correction code; and determining whether the main memory cells store the second data or the recovered first data based on the number of the errors relative to a first threshold value.