摘要：本文介紹了一種基于單片機(jī)和測(cè)量電壓真有效值方案設(shè)計(jì)的智能數(shù)字交流毫伏表。它能精確測(cè)量任意波形的低頻模擬周期信號(hào)并同時(shí)顯示其有效值和分貝值。具有智能量程轉(zhuǎn)換功能。 關(guān)鍵詞：?jiǎn)纹瑱C(jī) 數(shù)字毫伏表 真有效值 智能量程轉(zhuǎn)換
上傳時(shí)間： 2013-11-09
上傳用戶：gaoqinwu
普通查表原理 查表時(shí)，執(zhí)行CALL指令后，下一條指令的地址被自動(dòng)壓入堆棧中，然后跳轉(zhuǎn)到數(shù)據(jù)表處，執(zhí)行TJMP指令，PC指針跳轉(zhuǎn)到PC11~PC8,TBR（TABLE BRANCH REGISTER）,AC(累加器)所指向的地址，該地址的數(shù)據(jù)通過(guò)RTNW指令返回，其中，高4位數(shù)據(jù)保存到TBR寄存器中，低4位數(shù)據(jù)保存到累加器AC中。返回時(shí)PC指針會(huì)自動(dòng)被堆棧中保存的PC數(shù)據(jù)覆蓋。
標(biāo)簽： 中穎 位單片機(jī) 注意事項(xiàng)
上傳時(shí)間： 2014-12-27
上傳用戶：zhaoman32
摘要：數(shù)字電壓表抗干擾能力強(qiáng)、測(cè)量速度快、測(cè)量準(zhǔn)確度高。本系統(tǒng)采AT89C51單片機(jī)、A／D轉(zhuǎn)換器ADC0808和共陽(yáng)極數(shù)碼管為主要硬件，詳細(xì)分析了數(shù)字電壓表Proteus軟件仿真電路設(shè)計(jì)及編程方法。關(guān)鍵詞：數(shù)字電壓表；單片機(jī)；A／D轉(zhuǎn)換器
上傳時(shí)間： 2013-10-26
上傳用戶：tiantwo
MCS-51系列單片機(jī)指令系統(tǒng)表數(shù)據(jù)傳送類指令
標(biāo)簽： MCS 51 單片機(jī) 指令系統(tǒng)
上傳時(shí)間： 2014-12-27
上傳用戶：13817753084
現(xiàn)代儀表最突出的特點(diǎn)是功能的模塊化，組裝一塊儀表通常只需將幾個(gè)功能模塊在定制PCB的基礎(chǔ)上聯(lián)合起來(lái)，就可以得到一個(gè)完整的系統(tǒng)。長(zhǎng)安等經(jīng)濟(jì)型汽車的指針儀表一般為獨(dú)立的模塊，提示/報(bào)警功能由PCB 上的小燈泡完成。SANTANA 系列的指針由 PCB上的十字線圈驅(qū)動(dòng)，提示/報(bào)警燈全部是發(fā)光二極管。轎車儀表板上顯示的主要數(shù)據(jù)、來(lái)源及對(duì)應(yīng)顯示方式如表1所示（SANTANA2000），可見(jiàn)目前的汽車儀表尚以機(jī)械式為主，通訊方式以線束為主。這種模式最大的弊病是過(guò)于依賴線束，導(dǎo)致系統(tǒng)的復(fù)雜化。
上傳時(shí)間： 2013-11-15
上傳用戶：三人用菜
摘要：本文首先簡(jiǎn)要說(shuō)明了同步表在船舶電站中的用途，以及實(shí)船上同步表各個(gè)部分的功能和操作方法；文中介紹了在輪機(jī)模擬器上對(duì)于電站同步表的一種新的仿真模型以及該模擬器對(duì)同步表的要求，這一仿真模型和模擬器需求是文中介紹的基于單片機(jī)的同步表的基礎(chǔ)；根據(jù)這一模型，詳細(xì)介紹了用通用單片機(jī)STC89C51實(shí)現(xiàn)輪機(jī)模擬器電站系統(tǒng)上的同步表的系統(tǒng)構(gòu)成，以及模擬實(shí)現(xiàn)同步表各項(xiàng)功能的的硬件和軟件方法，并在文中給出了詳細(xì)的軟件流程圖和部分硬件原理圖以及配套的軟件代碼；在文章最后，簡(jiǎn)要介紹了本文實(shí)現(xiàn)的基于單片機(jī)的同步表的特點(diǎn)以及其在輪機(jī)模擬器上實(shí)際應(yīng)用的表現(xiàn)。關(guān)鍵詞：船舶電站；同步表；單片機(jī)；模擬
標(biāo)簽： 單片機(jī) 輪機(jī)模擬器 電站
上傳時(shí)間： 2013-11-23
上傳用戶：lili123
STK單片機(jī)選型表
上傳時(shí)間： 2013-11-21
上傳用戶：魚(yú)哥哥你好
C8051F330低成本智能單相交流電壓表方案(取代傳統(tǒng)動(dòng)圈表) 該方案采用的http://www.elecfans.com/soft/33/2010/單片機(jī)集成度高，資源豐富。與其它類型的http://www.elecfans.com/soft/33/2010/單片機(jī)相比，所需要外加的外圍器件最少，是做智能單相電流電壓表最理想的一款http://www.elecfans.com/soft/33/2010/單片機(jī)。
標(biāo)簽： C8051F330 單相交流 動(dòng)圈 電壓表
上傳時(shí)間： 2013-10-27
上傳用戶：z754970244
常用三星單片機(jī)燒寫電壓設(shè)置參考表 燒寫電壓說(shuō)明:Vdd 電壓指燒寫時(shí)加載到芯片Vdd 端子的邏輯電壓,Vpp 電壓指燒寫時(shí)加載到芯片Vpp(Test)端子的編程電壓, Vpp=12V 是編程器的默認(rèn)燒寫電壓,無(wú)須特別設(shè)置. 由于編程器的默認(rèn)輸出Vpp 電壓均為12V,因此在燒寫Vpp=3.3V/5.0V 的芯片時(shí),需要對(duì)燒寫轉(zhuǎn)換適配器作以下改動(dòng):將燒寫器燒寫座引出的Vpp 端子完全空置不用, 并在適配器上將Vdd端子直接連接Vpp 端即可.當(dāng)用戶采用在PCB板上燒寫方式時(shí),建議最好能在PCB芯片端的Vpp腳并接一個(gè)104 的電容入地,可有效保護(hù)在燒寫電壓加載時(shí)板子電路共同作用產(chǎn)生的瞬間過(guò)壓脈沖不會(huì)輸入到Vpp 腳而造成Vpp 擊穿.S3F84K4 燒寫特別說(shuō)明,由于三星半導(dǎo)體DATA SHEET 要求在對(duì)該芯片進(jìn)行燒寫時(shí),須在Vpp 腳加接一個(gè)101 的電容到地,因此在使用我站各款燒寫器燒寫84K4 時(shí),須將燒寫器主板上的Vpp 端原來(lái)并接的10uf/50V-電解電容和104 電容去掉,另行并接一個(gè)101 電容入地即可.不過(guò),據(jù)本人特別測(cè)試結(jié)果,其實(shí)不做以上處理對(duì)燒寫過(guò)程沒(méi)有任何影響, 估計(jì)可能是三星半導(dǎo)體對(duì)芯片有做過(guò)改版,老版本的84K4 才會(huì)有以上特別要求,新版本是沒(méi)有這個(gè)要求的.
標(biāo)簽： 三星 單片機(jī) 燒寫 電壓設(shè)置
上傳時(shí)間： 2013-10-10
上傳用戶：wcl168881111111
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
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