Patent ID: 7571276

Claim:
A method of performing a read operation in a memory device, the memory device comprising a NAND flash memory having a memory cell array and a page buffer; and a data RAM configured to output data in response to a clock signal received from a host, wherein the data RAM comprises a first data RAM and a second data RAM, the method comprising: sensing data stored in one page of the memory cell array in the page buffer; transferring the sensed data from the page buffer to the data RAM in multiple blocks via a corresponding number of transfer operations by transferring a first block of sensed data from the page buffer to the first data RAM, and afterwards, transferring a second block of sensed data from the page buffer to the second data RAM; and reading the transferred data from the data RAM in response to the host clock signal, wherein a read-out operation for the transferred data commences during any one of the plurality of transfer time periods.