Method for multimedia application processor to be compatible with various NandFlash

Abstract

The invention discloses a method for multimedia application processor compatible with various Nandflash, comprising: 1. connecting each Nandflash onto a corresponding chip selection of the processor, and short-circuiting R / b (ready / busy indicating pins) of each Nandflash and then connecting to the R / b of the processor; 2. abstracting the each common physical characteristics to compose to a specific data structure list based on different physical characteristics of the Nandflash; 3. configuring the corresponding register based on each Nandflash AC time sequence parameter and so on physical characteristics; accessing each Nandflash conveniently of the MTD layer of the system based on a structure body and a pointer. The invention can abstract various physical characteristics of the Nandflashas the common structure body by a driving layer, can provide the structure body and a function pointer to the MTD layer, simultaneously can control the processor to enable the processor to output an appropriate read-write time sequence to access the Nandflash, thereby ensuring the upper layer application of the MTD and the FS, without concerning the bottom layer various Nandflash types, the various Nandflash memory devices can be accessed conveniently and stably.

Description

technical field [0001] The invention relates to a method for storing and reading data by using a multimedia application processor to be compatible with various Nandflash storage devices (including single-chip or multi-chip nandflashes of different manufacturers and different types). Background technique [0002] In recent years, the rapid development of portable electronic products has put forward new requirements for memory, such as: small size, large capacity, low power, non-volatility and shock resistance. Therefore, the traditional hard disk and memory are not suitable for the new portable system. The biggest difference between flash memory and general DRAM or SRAM is that flash memory can preserve data integrity when there is no power supply, and it is a non-volatile memory. In addition, flash memory has power saving function and shock resistance, and is the best storage medium in the application of mobile devices. Therefore, flash memory has become the best memory sol...

AI Technical Summary

Problems solved by technology

However, when the embedded system needs to support more and more Nandflash with complex structures and varying timings, the original model becomes inadequate.

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