Patent ID: 7971123
Filing Date: 2011-06-28
Classification: G06F,G11C

Abstract:
1. A method for operating a memory cell collection storing binary data, the method comprising: dividing a characteristic parameter of the memory cell collection into a plurality of characteristic parameter bands; assigning a binary multi-bit value to each of the plurality of characteristic parameter bands; converting the binary multi-bit values to be stored in the memory cell collection to characteristic parameter values, the characteristic parameter values being in the characteristic parameter band associated with the assigned binary multi-bit value corresponding to the binary multi-bit value; storing the binary multi-bit values in the memory cell collection as the characteristic parameter values; storing a stored count for each binary multi-bit value, the stored count being equal to the number of occurrences the binary multi-bit value is stored in the memory cell collection; converting the stored characteristic parameter values to retrieved binary multi-bit values according to the assigned binary multi-bit values; determining a retrieved count for each binary multi-bit value, the retrieved count being equal to the number of occurrences the binary multi-bit value is retrieved from the memory cell collection; and if the stored count of each binary multi-bit value is not equal to the retrieved count of each binary multi-bit value, the method further comprising: