Patent ID: 11907545
Assignee: SANDISK TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 9:
10. A method, comprising:
performing a read operation by each of a plurality of sense amplifiers on a plurality of memory cells, each sense amplifiers configured to read data from the memory cells connected to a corresponding one or more bit lines, the bits forming of a plurality of columns including a plurality of regular columns and one or more spare columns;
storing results of the read operation by each of the sense amplifiers in a corresponding set of internal data latches;
performing, within the corresponding set of internal data latches, a data compression operation of the results of the read operations by each of the sense amplifiers;
re-ordering bits of the compressed results of the read operation;
subsequent to re-ordering bits of the compressed results of the read operation, replacing the compressed results of the read operation from defective ones of the regular columns with corresponding compressed results of the read operation from spare columns by multiplexing circuitry on the re-ordered bits of the compressed results of the read operation;
storing the re-ordered bits of the compressed results with the compressed results of the read operation from defective ones of the regular columns replaced with corresponding compressed results of the read operation from spare columns in a plurality of first in, first out data buffers (FIFOs); and
transferring the compressed results of the read operation, including replaced compressed results of the read operation, from the plurality of FIFOs to an external data bus.