Read control device, read control method and memory controller for memory

Abstract

The present invention provides a read control device, a read control method and a memory controller for a memory. The reading control device for the memory includes: DSP firmware, used to pre-store a plurality of static voltmeters; a table selection module, used to select part of the static voltmeters from the pre-stored static voltmeters according to the first parameter; The sorting module is used to prioritize the selected static voltmeter according to the second parameter; the detection voltage configuration module is used to set the detection voltage according to the priority of the selected static voltmeter; the reading module is used to read from the memory The stored data is fetched; the ECC decoding circuit is used for decoding and correcting the stored data. In the present invention, the frequency of retrying the reading operation of the reading control device is reduced by prioritizing the static voltmeters, and by reducing the number of static voltmeters, the ECC decoding circuit is only performed in a limited number of correct static voltmeters. Polling, thereby improving the error correction efficiency of the ECC decoding circuit.

Description

technical field [0001] The present application relates to the field of memory, and more particularly to a read control device, a read control method, and a memory controller for a memory. Background technique [0002] Flash memory (flash) is a non-volatile memory widely used in electronic devices such as memory cards, solid state drives, and portable multimedia players. The flash memory can be classified into NOR type flash memory and NAND type flash memory. [0003] In order to ensure data security, an ECC (Error Checking and Correction) decoding circuit is usually installed in the controller of the flash memory for data recovery and error correction processing. The ECC decoding circuit is set at the control end of the flash memory. In the data writing stage, the encoded data generated based on the original data encoding is stored in the flash memory. In the data reading stage, an error correction code (ECC) is used to correct a certain amount of data. erroneous data bits...

AI Technical Summary

Problems solved by technology

Moreover, when the service life of the flash memory increases, the various working states of the flash memory are also constantly changing, resulting in a significant increase in the probability of read operation errors.

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