Method and device for reading and writing data

Abstract

The embodiment of the invention discloses a method and device for reading and writing data. When the data needs to be sent from a first memory to a target memory, multiple cache areas can be preset, a first data packet is read from the first memory, and the first data packet is written into a first cache area; when the first data packet is completely written into the first cache area, an ecc algorithm can be used to encode or decode the first data packet, a second data packet can be read from the first memory during a processing period of encoding or decoding, and the second data packet is written into a second cache area; and when the encoding or decoding processing of the first data packet is completed, the first data packet can be sent to the target memory, and data transmission from the first memory to the target memory can be completed with processing processed of the first data packet as the reference. During the processing course, a time interval of the encoding or decoding processing is fully used, so that efficiency of data reading and writing can be increased effectively.

Description

technical field [0001] The invention relates to the technical field of data reading and writing, in particular to a data reading and writing method and device. Background technique [0002] Memory is a memory device used to save information in modern information technology. With the memory, the computer has the memory function to ensure normal work. The main function of the memory is to store programs and various data, and to complete the program or data access at high speed and automatically during the operation of the computer. There are many types of memory. Nand-flash memory has the advantages of large capacity and fast rewriting speed. It is suitable for storing large amounts of data, so it has been more and more widely used in the industry. For the convenience of subsequent introductions, Nand-flash The memory is called nand for short. Because nand has bit errors when reading and writing data, it uses the ECC algorithm to encode the data (ecc encoding) when the data ...

AI Technical Summary

Problems solved by technology

[0003] In the traditional way, when writing data to nand or reading data from nand, it is necessary to wait for the data to be encoded or decoded before writing new data to nand or reading new data from nand, while the data The process of encoding or decoding often takes a lot of time, resulting in a large loss of read and write bandwidth, making the efficiency of data reading and writing low

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