<button id="saqaa"></button> <button id="saqaa"></button> 介紹了一種基于AT89S52微處理器、鍵控顯示模式、多漢字顯示的顯示模塊設計方法。對AT89S52的內部功能及使用高128字節RAM時的尋址方式進行說明。給出了四漢字顯示模塊的硬件電路原理圖、主程序流程圖以及中斷顯示流程圖。 Abstract: The design method of display module base on the AT89S52 microcontroller,display mode controlled by keyboard and? showing several Chinese characterses are introduced in the paper.The internal function and the addressing mode for the high 128B RAM of the AT89S52 are explained.The basic circuit diagram,the main program flow chart and the display interrupt flow chart of four Chinese characterses display module are also given.
上傳時間： 2014-01-23
上傳用戶：咔樂塢
在需要實時大量輸入漢字的顯示控制處理應用中，利用傳統單片機實現顯示控制的設計方法是較難實現的。帶漢字字庫的液晶模塊的使用使得小容量ROM單片機的大量漢字信息輸入與顯示成為可能。提出了針對漢字字庫編碼的二級索引拼音輸入檢索方法,介紹了以ST7920作為控制器的帶漢字字庫的液晶顯示模塊的接口方法及漢字顯示和控制原理，給出了通用計算機鍵盤在單片機中的串行接口，采用該技術可大大增強單片機的漢字輸入功能。為小容量ROM單片機的大批量漢字信息處理提供了一種漢字輸入解決方案。 Abstract: It is difficult to realize Chinese characters input method based on the embedded system by using the traditional design method of display control. It is possible to input and display Chinese characters based on the embedded system with the ROM of small content by using the LCD module with Chinese characters.Chinese characters input method of the quadric index recall in allusion to Chinese characters code is brought forward.The interface and the principle of Chinese characters display control based on the LCD module controlled with the ST7920 is introduced too.The serial interface of the computer keyboard in common use and the embedded system is given at the same time. It can enhance the embedded system function of Chinese characters input by using this technology, and provide a kind of Chinese characters input scheme for the embedded system with small capacity ROM.
上傳時間： 2013-11-19
上傳用戶：jhksyghr
基于PIC單片機的低功耗讀卡器硬件設計:本文提出了一個完整的基于串口的智能讀卡器子系統設計方案并將其實現。讀卡器的設計突出了小型化的要求，全部器件使用貼片封裝。為了減小讀卡器的體積，設計中還使用了串口竊電的技術，使用串口信號線直接給讀卡器供電。為此，讀卡器使用了省電的設計，采用了省電的集成電路，并大膽簡化了許多傳統的設計電路。關鍵字： 讀卡器， 單片機， 串口竊電 Abstract： This paper aims to put forward a complete design of Smart IC card reader based onSerial Port and propose the way of realizing it for the purpose of Network Security. SMD isadopted to make Smart IC reader smaller in this design. To reduce the volume of Smart ICreader， Serial Port powered technology is employed to get power from the signal line of Serial Port. For this reason， low-power consumption components are adopted in the design and some traditional designs are simplified to reduce the power consumption.Keywords： Card Reader； Single-chip Computer； Serial Port Powered IC 卡系統保存了加密算法所需要的工作密鑰，供加密算法對網絡上傳輸的數據加密使用，是整個系統網絡安全的核心。在IC 卡子系統中，讀卡器是一個重要的部分。它起著管理IC卡、在IC 卡和PC或網絡計算機間傳遞數據的重要作用。本文以一片PIC單片機為核心完成了基于RS232 串口的讀卡器的硬件設計。
上傳時間： 2014-04-14
上傳用戶：wanghui2438
西門子PLC S7-200編程軟件最新版本(2012.3) STEP7 MicroWIN_V4 SP9 完整版, 全面支持Windows7。安裝完后，打開軟件，初次為英文版，點擊tools（左上角自左-右第6個）然后選擇最下面的options（自上而下第15個）單擊，出現又一個畫面，在左邊選擇第一個選項General，就出現了語言選項，選擇最下面的那個（Chinese）也就是中文。然后點擊OK按鈕，然后一路回車下去，直到軟件關閉，再打開時就是中文的啦！
上傳時間： 2013-11-19
上傳用戶：mikesering
One of the strengths of Synplify is the Finite State Machine compiler. This is a powerfulfeature that not only has the ability to automatically detect state machines in the sourcecode, and implement them with either sequential, gray, or one-hot encoding. But alsoperform a reachability analysis to determine all the states that could possibly bereached, and optimize away all states and transition logic that can not be reached.Thus, producing a highly optimal final implementation of the state machine.
標簽： Synplicity Machine Verilog Design
上傳時間： 2013-10-20
上傳用戶：蒼山觀海
manual
上傳時間： 2013-11-10
上傳用戶：linlin
bianpin
上傳時間： 2013-11-05
上傳用戶：qwe1234
西門子建筑電器-電氣安裝技術部發行的各類產品樣本：小型斷路器、剩余電流保護斷路器和模數化產品(中/ 英文)Miniature Circuit-Breakers, Residual Current Operated Circuit-Breakers and Modular Devices (Chinese/English)低壓熔斷器系統(中/ 英文)Fuse System (Chinese/English)雷擊，過電壓－不再是問題(中文)Thunderstorms - no problem (Chinese)西門子建筑電器目錄(中文)Electrical Installation Technology Catalog (Chinese)終端配電保護產品(中文)5 IN 1 (Chinese)SIKUS 和 STAB UNIVERSAL 目錄(中文)SIKUS and STAB UNIVERSAL Catalogue (Chinese)SIKUS HC 目錄(中文)SIKUS HC Catalogue (Chinese)SentronTM 母線槽 (中文)SentronTM Busway System (Chinese)SentronTM 母線槽系統快速選型 (準備中) (中文)SentronTM Busway System quick selection (in preparing) (Chinese)建筑低壓配電一體化解決方案－住宅小區應用(中文)Building LV PD Solution (Chinese)西門子 DELTA vista“遠景”系列開關和插座價目表(中文)Delta vista Switch and Socket Pricelist (Chinese)instabus EIB 面向未來的樓宇智能控制系統(中文)instabus EIB (Chinese)instabus EIB 面向未來的樓宇智能控制系統技術手冊 (準備中) (中文)instabus EIB technical handbook (in preparing) (Chinese)西門子電氣安裝技術業績卓越(中/ 英文)ET Reference Manual (Chinese/English)
上傳時間： 2013-11-23
上傳用戶：瓦力瓦力hong
labview的一份雜志
上傳時間： 2013-11-19
上傳用戶：誰偷了我的麥兜
在Multisim 10軟件環境下，設計一種由運算放大器構成的精確可控矩形波信號發生器，結合系統電路原理圖重點闡述了各參數指標的實現與測試方法。通過改變RC電路的電容充、放電路徑和時間常數實現了占空比和頻率的調節，通過多路開關投入不同數值的電容實現了頻段的調節，通過電壓取樣和同相放大電路實現了輸出電壓幅值的調節并提高了電路的帶負載能力，可作為頻率和幅值可調的方波信號發生器。Multisim 10仿真分析及應用電路測試結果表明，電路性能指標達到了設計要求。 Abstract: Based on Multisim 10， this paper designed a kind of rectangular-wave signal generator which could be controlled exactly composed of operational amplifier， the key point was how to implement and test the parameter indicators based on the circuit diagram. The duty and the frequency were adjusted by changing the time constant and the way of charging and discharging of the capacitor， the width of frequency was adjusted by using different capacitors provided with multiple switch， the amplitude of output voltage was adjusted by sampling voltage and using in-phase amplifier circuit，the ability of driving loads was raised， the circuit can be used as squarewave signal generator whose frequency and amplitude can be adjusted. The final simulation results of Multisim 10 and the tests of applicable circuit show that the performance indicators of the circuit meets the design requirements.
上傳時間： 2014-01-21
上傳用戶：shen007yue
