Patent ID: 8068360
Filing Date: 2011-11-29
Classification: G11C

Abstract:
1. A method for data storage, comprising: storing data in a memory that includes multi-bit analog memory cells, each of which stores at least first and second data bits by assuming one of a predefined plurality of programming levels associated with respective storage values, the memory having at least a first built-in command for reading the first data bits of the memory cells by comparing the storage values of the memory cells to a first number of first thresholds, and a second built-in command for reading the second data bits of the memory cells by comparing the storage values of the memory cells to a second number of second thresholds, such that the first number is less than the second number; and after storing the data, reading the first data bits from the memory cells by executing at least the second built-in command, wherein reading the first data bits by executing at least the second built-in command comprises reading multiple instances of the first data bits using the respective second thresholds.