当前位置:网站首页>Design of NAND flash interface control
Design of NAND flash interface control
2020-11-06 22:06:00 【DISPLAY】
Nand flash yes flash One kind of memory ,Nand flash It adopts nonlinear macro cell mode and provides a cheap and effective solution for the implementation of solid state large capacity memory .NAND FLASH Memory has the advantages of large capacity and fast rewriting speed, which is suitable for the storage of large amounts of data , Therefore, it has been widely used in the industry .NAND The structure can provide extremely high cell density , High storage density , And the speed of writing and erasing is very fast . This article introduces the memory chip supplier Yuxin electronics about NAND Flash Storage structure of and NAND Flash Interface control design of .
NAND Flash Storage structure of
Most of the NAND Flash It's all the same , The only difference is that NAND Flash The basic characteristics of the chip, such as capacity size and read-write speed .
block Block yes NAND Flash The basic of erase operation of / Smallest unit . Page is the basic unit of read and write operations .
Every page , There's another area , It's called the free zone / Redundant areas , And in the Linux In the system ﹐ Generally called OOB(Out Of Band)[2]. This area was originally based on NAND Flash Hardware features of ﹐ Data is relatively error prone when reading and writing ﹐ So in order to ensure the correctness of the data , There must be a corresponding detection and error correction mechanism , This mechanism is called EDC /ECC. So the extra areas are designed ﹐ Check value used to place data .OOB Read and write operations are generally completed along with page operations , When reading and writing a page , Read and write accordingly OOB.OOB Main purpose of : Whether the mark is a bad block ﹐ Storage ECC data ﹐ Store some file system related data .
NAND Flash Interface control design of
because NAND Flash Only 8 individual I/O Pin , And it's reusable , It can transmit data ﹐ You can also send an address 、 command . Design command latch enable (Command Latch Enable,CLE) And address latch enable ( Ad-dress Latch Enable,ALE), That is to send a CLE( or ALE) command , tell NAND Flash A sound from the controller , The picture to be passed on below 1NAND Flash The control circuit is a command ( Or address ). such NAND Flash Internal ability according to the content of the incoming ﹐ Do the corresponding action . Relative to parallel port NOR Flash Of 48 or 52 One pin , Greatly reduces the number of pins , In this way, the chip is small in size . At the same time, the chip interface is reduced ﹐ The peripheral circuits associated with this chip will be simplified , Avoid cumbersome hardware wiring .
NAND Flash The interface control circuit is shown in the figure 1 Shown
版权声明
本文为[DISPLAY]所创,转载请带上原文链接,感谢
边栏推荐
- Understanding formatting principles
- File download manager realized by electron
- Count the number of project code lines
- Call analysis of start method in JNI thread and callback analysis of run method
- STM32F030K6T6兼容替换灵动MM32F031K6T6
- An article takes you to understand CSS gradient knowledge
- How to start the hidden preferences in coda 2 on the terminal?
- [forward] how to view UserData in Lua
- Epu360: all the H5 templates you want are here, e-book, big turntable, red envelope rain, questionnaire survey
- 2020-08-19: what mechanism does TCP ensure reliability?
猜你喜欢
To solve the problem that the data interface is not updated after WPF binding set
高速公路二维码定位报警系统
2020-08-20: the difference between go and python?
August 30, 2020: naked write algorithm: the nearest common ancestor of two nodes in a binary tree.
迅为-iMX6ULL开发板上配置AP热点
预留电池接口,内置充放电电路及电量计,迅为助力轻松搞定手持应用
Flink's datasource Trilogy: direct API
Code generator plug-in and creator preform file analysis
Countdown | 2020 PostgreSQL Asia Conference - agenda arrangement of Chinese sub Forum
Unexpected element.. required element
随机推荐
实用工具类函数(持续更新)
Qt音视频开发46-视频传输UDP版
git远程库回退指定版本
MRAM高速缓存的组成
Bluetooth broadcast chip for Shanghai giant micro
Ora-02292: complete constraint violation (midbjdev2.sys_ C0020757) - subrecord found
Using an example to understand the underlying processing mechanism of JS function
Python basic data type -- tuple analysis
Interviewer: how about shardingsphere
Detect certificate expiration script
【涂鸦物联网足迹】涂鸦云平台全景介绍
细数软件工程----各阶段必不可少的那些图
Unity performance optimization
Understanding formatting principles
迅为iMX6开发板-设备树内核-menuconfig的使用
C calls SendMessage to refresh the taskbar icon (the icon does not disappear at the end of forcing)
Google browser realizes video playback acceleration function
vue3 新特性
2020-08-15: under what circumstances should data tasks be optimized?
A concise tutorial for Nacos, ribbon and feign