Reading control apparatus and method used for memory, and memory controller

Abstract

The invention provides a reading control apparatus and method used for a memory, and a memory controller. The reading control apparatus for the memory comprises DSP firmware used for pre-storing multiple static voltage meters, a meter selection module used for selecting part of the static voltage meters from the pre-stored static voltage meters according to a first parameter, a table sorting module used for performing priority sorting on the selected static voltage meters according to a second parameter, a detection voltage configuration module used for setting detection voltages according topriorities of the selected static voltage meters, a reading module used for reading stored data from the memory, and an ECC decoding circuit used for performing decoding and error correction on the stored data. By reducing the quantity of the static voltage meters, the ECC decoding circuit performs roll polling only in the finite quantity of the correct static voltage meters, so that the error correction efficiency of the ECC decoding circuit is improved.

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...

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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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