Data reading method, memory controller, and memory storage device

摘要

A data reading method adapted to a rewritable non-volatility memory module having physical blocks is provided, wherein each physical block has a plurality of physical pages. In the data reading method, each physical page is partitioned into bit data areas, where at least one of the bit data areas has a data length different from that of the other bit data areas. Data is written into the bit data areas. Data in each bit data area is corresponding to an ECC frame. The data is read from the bit data areas. Because the at least one of bit data areas has a relatively short data length, the error correction capability is improved and the data can be correctly read. An error bit information is obtained according to the read data. A log likelihood ratio (LLR) lookup table or a threshold voltage is adjusted according to the error bit information.

主权项

1. A data reading method, adapted to a rewritable non-volatility memory module, wherein the rewritable non-volatility memory module has a plurality of physical blocks, and each of the physical blocks has a plurality of physical pages, the data reading method comprising:
partitioning each of the physical pages into a plurality of bit data areas, wherein in each of the physical pages, at least one of the bit data areas has a data length different from the other bit data areas; writing data into the bit data areas, wherein each of the bit data areas is corresponding to an error checking and correcting (ECC) frame, and among the ECC frames, the ECC frame corresponding to the at least one bit data area has a relatively short data length; reading the data from the bit data areas; executing a data processing procedure according to the read data to obtain an error bit information; and adjusting a log likelihood ratio (LLR) lookup table or at least one threshold voltage according to the error bit information.