NAND Flash設(shè)備

通信工程論文編號(hào):TX392  論文字?jǐn)?shù):10928,頁數(shù):49

目   錄

摘要 I
Abstract II
第1章 緒論 1
1.1課題背景 1
1.2 研究?jī)?nèi)容 2
第2章 工具介紹 3
2.1 ADS1.2簡(jiǎn)介 3
2.2 JTAG仿真器簡(jiǎn)介 4
第3章 STR710XF芯片的EMI介紹 5
3.1 EMI總線接口信號(hào)描述 5
3.2 EMI內(nèi)存映射 5
3.3 EMI可編程時(shí)間 5
3.4寄存器描述 6
第4章 NAND Flash介紹 9
4.1存儲(chǔ)組織 9
4.2信號(hào)描述 9
4.2.1  輸入/輸出(I/O0-I/O15) 9
4.2.2  地址使能(AL) 10
4.2.3  指令使能(CL) 10
4.2.4  片選使能(E) 10
4.2.5  讀使能(R) 10
4.2.6  寫使能(W) 10
4.2.7  寫保護(hù)(WP) 10
4.2.8  就緒/忙(RB) 10
第5章 NAND Flash驅(qū)動(dòng)軟件設(shè)計(jì) 12
5.1硬件邏輯連接圖 12
5.2總線操作 12
5.2.1  指令輸入 12
5.2.2  地址輸入 14
5.2.3  數(shù)據(jù)輸入 15
5.2.4  數(shù)據(jù)輸出 16
5.2.5  寫保護(hù) 18
5.2.6  標(biāo)準(zhǔn)模式 18
5.3內(nèi)存操作 18
5.3.1  頁讀 18
5.3.2  頁寫 19
5.3.3  塊拷貝 22
5.3.4  塊擦除 24
5.3.5  復(fù)位 26
5.3.6  讀芯片ID 27
第6章 總結(jié) 28
致謝 29
參考文獻(xiàn) 30
附錄1 源程序 31

摘要

 NAND Flash設(shè)備能被連接到微控制器系統(tǒng)總線，用于大容量的指令和數(shù)據(jù)的儲(chǔ)存,廣泛應(yīng)用于U盤或儀器設(shè)備的數(shù)據(jù)保存。對(duì)于通用的微控制器，NAND Flash被連接時(shí)無須額外的膠合邏輯，簡(jiǎn)化了硬件。NAND Flash 存儲(chǔ)器是使用Single Level Cell(SLC)NAND cell技術(shù)的穩(wěn)定的Flash存儲(chǔ)器家族。此類芯片的接口中數(shù)據(jù)線與地址線復(fù)用，這樣的接口減少了管腳的數(shù)量，并且使得在不改變硬件設(shè)計(jì)的條件下更換不同容量的芯片成為可能。但是它的操作時(shí)序復(fù)雜特殊，因此驅(qū)動(dòng)軟件的設(shè)計(jì)成為使用該芯片的關(guān)鍵。本論文詳細(xì)介紹了NAND Flash與ARM芯片STR710X的硬件接口,以及驅(qū)動(dòng)軟件程序,包括對(duì)該芯片的讀寫操作、擦除操作和其它相關(guān)函數(shù)。經(jīng)過驗(yàn)證這些驅(qū)動(dòng)軟件可以實(shí)現(xiàn)數(shù)據(jù)的大量存儲(chǔ)和讀取。該軟件驅(qū)動(dòng)易于移植到不同的硬件平臺(tái)。

關(guān)鍵詞：NAND Flash, 微控制器, 移植, 軟件驅(qū)動(dòng)

Abstract

 NAND Flash devices, which can be connected to the microcontroller system bus for the store of commands and statistics of bulk memory, is commonly applied in USB and other equipment’s data preservation. As for common microcontrollers, there’s no need of extra glue logic when NAND FLASH is being connected to them, which simplifies hardwares. NAND FLESH memory belongs to the non-volatile Flash memory family which adopts Single Level Cell (SLC) NAND cell technology. At these chips’ interfaces, data line and address line are combined into one bus line. This kind of interfaces not only use less pins but also make possible for the change of larger memory chips without changing hardwares. However, because of its complex and special operation cycle time, the design of software driver becomes the focus of the chips. This paper gives detailed introduction about the hardware interface of NAND FLASH and ARM chip STR710X, and driver software, including the read and write to the chip, erasing practices and other relative functions. Test proves that these driver softwares can access large data memory. This software driver can be easily migrated to different hardware platforms. 
Keywords: NAND Flash, microcontroller, migration, software drivers