]本文介紹了如何利用CPLD(復(fù)雜可編程邏輯器件)與單片機(jī)的結(jié)合實(shí)現(xiàn)并行I／\r\nO(輸入／輸出)接口的擴(kuò)展。該設(shè)計(jì)與用8255做并行I／O接口相比，與單片機(jī)軟件完全兼容，\r\n同時(shí)擁有速度快，功耗低，價(jià)格便宜，使用靈活等特點(diǎn)
標(biāo)簽： CPLD 如何利用 單片機(jī) 并行
上傳時(shí)間： 2013-08-14
上傳用戶：xa_lgy
:針對(duì)現(xiàn)場(chǎng)可編程門陣列(FPGA)芯片的特點(diǎn),研究FPGA中雙向端口I/O的設(shè)計(jì),同時(shí)給出仿真初始化雙向端口I/O的方法。采用這種雙向端口的設(shè)計(jì)方法,選用Xilinx的Spartan2E芯片設(shè)計(jì)一個(gè)多通道圖像信號(hào)處理系統(tǒng)。
上傳時(shí)間： 2013-08-17
上傳用戶：xiaoyunyun
Recent advances in low voltage silicon germaniumand BiCMOS processes have allowed the design andproduction of very high speed amplifi ers. Because theprocesses are low voltage, most of the amplifi er designshave incorporated differential inputs and outputs to regainand maximize total output signal swing. Since many lowvoltageapplications are single-ended, the questions arise,“How can I use a differential I/O amplifi er in a single-endedapplication?” and “What are the implications of suchuse?” This Design Note addresses some of the practicalimplications and demonstrates specifi c single-endedapplications using the 3GHz gain-bandwidth LTC6406differential I/O amplifi er.
標(biāo)簽： 單端應(yīng)用 差分 放大器
上傳時(shí)間： 2013-11-23
上傳用戶：rocketrevenge
PCB LAYOUT 基本規(guī)範(fàn)項(xiàng)次 項(xiàng)目 備註1 一般PCB 過(guò)板方向定義： PCB 在SMT 生產(chǎn)方向?yàn)槎踢呥^(guò)迴焊爐(Reflow), PCB 長(zhǎng)邊為SMT 輸送帶夾持邊. PCB 在DIP 生產(chǎn)方向?yàn)镮/O Port 朝前過(guò)波焊爐(Wave Solder), PCB 與I/O 垂直的兩邊為DIP 輸送帶夾持邊.1.1 金手指過(guò)板方向定義： SMT: 金手指邊與SMT 輸送帶夾持邊垂直. DIP: 金手指邊與DIP 輸送帶夾持邊一致.2 SMD 零件文字框外緣距SMT 輸送帶夾持邊L1 需≧150 mil. SMD 及DIP 零件文字框外緣距板邊L2 需≧100 mil.3 PCB I/O port 板邊的螺絲孔(精靈孔)PAD 至PCB 板邊, 不得有SMD 或DIP 零件(如右圖黃色區(qū)).PAD
上傳時(shí)間： 2014-12-24
上傳用戶：jokey075
HIGH SPEED 8051 μC CORE - Pipe-lined Instruction Architecture; Executes 70% of Instructions in 1 or 2 System Clocks - Up to 25MIPS Throughput with 25MHz System Clock - 22 Vectored Interrupt Sources MEMORY - 4352 Bytes Internal Data RAM (256 + 4k) - 64k Bytes In-System Programmable FLASH Program Memory - External Parallel Data Memory Interface – up to 5Mbytes/sec DIGITAL PERIPHERALS - 64 Port I/O; All are 5V tolerant - Hardware SMBusTM (I2CTM Compatible), SPITM, and Two UART Serial Ports Available Concurrently - Programmable 16-bit Counter/Timer Array with 5 Capture/Compare Modules - 5 General Purpose 16-bit Counter/Timers - Dedicated Watch-Dog Timer; Bi-directional Reset CLOCK SOURCES - Internal Programmable Oscillator: 2-to-16MHz - External Oscillator: Crystal, RC, C, or Clock - Real-Time Clock Mode using Timer 3 or PCA SUPPLY VOLTAGE ........................ 2.7V to 3.6V - Typical Operating Current: 10mA @ 25MHz - Multiple Power Saving Sleep and Shutdown Modes 100-Pin TQFP (64-Pin Version Available) Temperature Range: –40°C to +85°C
標(biāo)簽： C8051F020
上傳時(shí)間： 2013-10-12
上傳用戶：lalalal
常用主板I/O芯片簡(jiǎn)介
上傳時(shí)間： 2013-11-10
上傳用戶：yupw24
〔摘要〕介紹了幾種通過(guò)單片機(jī)1/O口鍵盤(pán)擴(kuò)展的方法。主要探討了幾種采用較少的1/O口實(shí)現(xiàn)較多按鍵的方法。〔關(guān)鍵詞〕單片機(jī);1/O口;鍵盤(pán)擴(kuò)展
標(biāo)簽： 單片機(jī) 鍵盤(pán) 擴(kuò)展方法
上傳時(shí)間： 2013-10-31
上傳用戶：jkhjkh1982
各系列I/O型單片機(jī)使用手冊(cè) 第一部份 單片機(jī)概論 1第一章 硬件結(jié)構(gòu) 3簡(jiǎn)介3特性4技術(shù)特性4內(nèi)核特性4周邊特性5選擇表6系統(tǒng)框線圖7引腳分配8引腳說(shuō)明10極限參數(shù)15直流電氣特性16交流電氣特性18EEPROM 交流電氣特性18系統(tǒng)結(jié)構(gòu)圖19時(shí)序和流水線結(jié)構(gòu)(Pipelining) 19程序計(jì)數(shù)器21堆棧23算術(shù)及邏輯單元 – ALU24MTP 程序存儲(chǔ)器25結(jié)構(gòu)25特殊向量26查表27查表程序范例28在線燒寫(xiě)30數(shù)據(jù)存儲(chǔ)器31結(jié)構(gòu)31通用數(shù)據(jù)存儲(chǔ)器32專用數(shù)據(jù)存儲(chǔ)器32
上傳時(shí)間： 2013-10-15
上傳用戶：yimoney
I/O 型單片機(jī)使用手冊(cè) 目錄 間接尋址寄存器 – IAR, IAR0, IAR1 .............................................35間接尋址指針 – MP, MP0, MP1 ......................................................35存儲(chǔ)區(qū)指針 – BP .........................................................................36累加器 – ACC...................................................................................37程序計(jì)數(shù)器低字節(jié)寄存器 – PCL....................................................37表格寄存器 – TBLP,TBHP,TBLH....................................................37看門狗定時(shí)寄存器 – WDTS............................................................38狀態(tài)寄存器 – STATUS.....................................................................38中斷控制寄存器 – INTC,INTC0,INTC1 .........................................39定時(shí)/計(jì)數(shù)寄存器...............................................................................39輸入/輸出端口和控制寄存器...........................................................40UART 寄存器 .USR,UCR1,UCR2,TXR/RXR,BRG.......................40輸入/輸出端口..........................................................................................41上拉電阻............................................................................................41PA 口的喚醒......................................................................................41輸入/輸出端口控制寄存器...............................................................41引腳共享功能....................................................................................42編程注意事項(xiàng)....................................................................................45定時(shí)/計(jì)數(shù)器..............................................................................................46配置定時(shí)/計(jì)數(shù)器輸入時(shí)鐘源...........................................................47定時(shí)/計(jì)數(shù)寄存器 – TMR, TMR0,TMR0L/TMR0H,TMR1L/TMR1H,TMR2.....................................................................49定時(shí)/計(jì)數(shù)控制寄存器 – TMRC,TMR0C,TMR1C,TMR2C............50定時(shí)器模式........................................................................................53事件計(jì)數(shù)器模式................................................................................53脈沖寬度測(cè)量模式............................................................................54可編程分頻器(PFD)和蜂鳴器的應(yīng)用..............................................55預(yù)分頻器(Prescaler)...........................................................................56輸入/輸出接口...................................................................................56編程注意事項(xiàng)....................................................................................57定時(shí)/計(jì)數(shù)器應(yīng)用范例.......................................................................57中斷............................................................................................................59中斷寄存器........................................................................................59中斷優(yōu)先權(quán)........................................................................................62外部中斷............................................................................................63定時(shí)/計(jì)數(shù)器中斷...............................................................................64UART 中斷........................................................................................64編程注意事項(xiàng)....................................................................................65復(fù)位和初始化............................................................................................66復(fù)位....................................................................................................66目錄iii異步串行口——UART............................................................................74UART 特性..........................................................................................74UART 外部引腳..................................................................................74數(shù)據(jù)發(fā)送.............................................................................................75UART 狀態(tài)控制寄存器......................................................................75波特率發(fā)生器.....................................................................................79UART 設(shè)置與控制..............................................................................81UART 發(fā)送器......................................................................................83UART 接收器......................................................................................84接收錯(cuò)誤處理.....................................................................................85接收中斷圖解.....................................................................................86地址檢測(cè)模式.....................................................................................86暫停模式下的UART 功能.................................................................87UART 應(yīng)用范例.................................................................................87振蕩器........................................................................................................89系統(tǒng)時(shí)鐘配置....................................................................................89系統(tǒng)晶體/陶瓷振蕩器.......................................................................89系統(tǒng)電阻電容振蕩器........................................................................90內(nèi)部系統(tǒng)電阻電容振蕩器................................................................90RTC 振蕩器........................................................................................91看門狗定時(shí)振蕩器............................................................................91暫停和喚醒................................................................................................92暫停.....................................................................................................92進(jìn)入暫停.............................................................................................92靜態(tài)電流.............................................................................................92喚醒....................................................................................................92看門狗定時(shí)器............................................................................................94掩膜選項(xiàng)....................................................................................................96應(yīng)用電路....................................................................................................97第二部份 程序語(yǔ)言.....................................................................99第二章 指令集介紹.................................................................................101指令集......................................................................................................101指令周期..........................................................................................101數(shù)據(jù)的傳送......................................................................................101算術(shù)運(yùn)算..........................................................................................102邏輯和移位運(yùn)算..............................................................................102分支和控制的轉(zhuǎn)換..........................................................................102位運(yùn)算..............................................................................................102查表運(yùn)算..........................................................................................103其它運(yùn)算..........................................................................................103指令設(shè)定一覽表......................................................................................104慣例..................................................................................................104I/O 型單片機(jī)使用手冊(cè)iv第三章 指令定義.....................................................................................107第四章 匯編語(yǔ)言和編譯器.....................................................................121常用符號(hào)..................................................................................................121語(yǔ)句語(yǔ)法..................................................................................................122名稱..................................................................................................122操作項(xiàng)..............................................................................................122操作數(shù)項(xiàng)..........................................................................................122注解..................................................................................................122編譯偽指令..............................................................................................123條件編譯偽指令..............................................................................123文件控制偽指令..............................................................................124程序偽指令......................................................................................126數(shù)據(jù)定義偽指令..............................................................................130宏指令..............................................................................................132匯編語(yǔ)言指令..........................................................................................136名稱..................................................................................................136助記符..............................................................................................136操作數(shù)、運(yùn)算子和表達(dá)式..............................................................136其它..........................................................................................................139前置引用..........................................................................................139局部標(biāo)號(hào)..........................................................................................139匯編語(yǔ)言保留字..............................................................................140編譯器選項(xiàng)..............................................................................................141編譯列表文件格式..................................................................................141源程序列表......................................................................................141編譯總結(jié)..........................................................................................142其它..................................................................................................142第三部份 開(kāi)發(fā)工具................................................................... 145第五章 單片機(jī)開(kāi)發(fā)工具.........................................................................147HT-IDE 集成開(kāi)發(fā)環(huán)境............................................................................147盛群?jiǎn)纹瑱C(jī)仿真器(HT-ICE) ..................................................................149HT-ICE 接口卡.................................................................................149OTP 燒寫(xiě)器.....................................................................................149OTP 適配卡.....................................................................................149系統(tǒng)配置..................................................................................................150HT-ICE 接口卡設(shè)置........................................................................151安裝..........................................................................................................153系統(tǒng)要求..........................................................................................153硬件安裝..........................................................................................153軟件安裝..........................................................................................154目錄v第六章 快速開(kāi)始.....................................................................................159步驟一：建立一個(gè)新項(xiàng)目..............................................................159步驟二：將源程序文件加到項(xiàng)目中..............................................159步驟三：編譯項(xiàng)目..........................................................................159步驟四：燒寫(xiě)OTP 單片機(jī).............................................................160步驟五：傳送程序與掩膜選項(xiàng)單至Holtek ..................................160附錄............................................................................................... 161附錄A 特性曲線圖...................................................................................163附錄B 封裝信息.......................................................................................173
上傳時(shí)間： 2013-10-18
上傳用戶：blacklee
HOLTEK I/O 8-Bit MTP輸入/輸出型八位可多次編程單片機(jī)初學(xué)者工具使用手冊(cè) MTP(可多次燒寫(xiě))使用者工具是一個(gè)認(rèn)識(shí)HOLTEK 8 位微控制器的快捷便利、低成本途徑。它也可以作為MTP 編程器和驗(yàn)證板。
上傳時(shí)間： 2013-10-08
上傳用戶：xiaodu1124
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