單片機(jī)作為一種微型計(jì)算機(jī)，其內(nèi)部具有一定的存儲單元（8031除外），但由于其內(nèi)部存儲單元及端口有限，很多情況下難以滿足實(shí)際需求。為此介紹一種新的擴(kuò)展方法，將數(shù)據(jù)線與地址線合并使用，通過軟件控制的方法實(shí)現(xiàn)數(shù)據(jù)線與地址線功能的分時(shí)轉(zhuǎn)換，數(shù)據(jù)線不僅用于傳送數(shù)據(jù)信號，還可作為地址線、控制線，用于傳送地址信號和控制信號，從而實(shí)現(xiàn)單片機(jī)與存儲器件的有效連接。以單片機(jī)片外256KB數(shù)據(jù)存儲空間的擴(kuò)展為例，通過該擴(kuò)展方法，僅用10個(gè)I/O端口便可實(shí)現(xiàn)，與傳統(tǒng)的擴(kuò)展方法相比，可節(jié)約8個(gè)I/O端口。 Abstract: As a micro-computer,the SCM internal memory has a certain units(except8031),but because of its internal storage units and the ports are limited,in many cases it can not meet the actual demand.So we introduced a new extension method,the data line and address lines combined through software-controlled approach to realize the time-conversion functions of data lines and address lines,so the data lines not only transmited data signals,but also served as address lines and control lines to transmit address signals and control signals,in order to achieve an effective connection of microcontroller and memory CHips.Take microcontroller CHip with256KB of data storage space expansion as example,through this extension method,with only10I/O ports it was achieved,compared with the traditional extension methods,this method saves8I/O ports.
標(biāo)簽： 單片機(jī) P0口 數(shù)據(jù)存儲器 擴(kuò)展
上傳時(shí)間： 2014-12-26
上傳用戶：adada
為提高太陽能的利用率，以ATmega8單片機(jī)為控制核心，設(shè)計(jì)了一套光電跟蹤與視日運(yùn)動軌跡跟蹤互補(bǔ)控制的雙軸太陽跟蹤器。該跟蹤器在晴天時(shí)，利用光敏電阻采集光強(qiáng)判斷太陽位置,控制步進(jìn)電機(jī)實(shí)現(xiàn)光電跟蹤；在陰天時(shí)，采集時(shí)鐘器件PCF8583的時(shí)間信息,計(jì)算當(dāng)前太陽位置來實(shí)現(xiàn)視日運(yùn)動軌跡跟蹤。實(shí)驗(yàn)表明：該太陽跟蹤器能在不同天氣狀況下對太陽進(jìn)行較準(zhǔn)確地跟蹤，能量接收效率提高了30%，達(dá)到充分利用太陽能的目的。 Abstract: To improve the utilization rate of solar energy，a kind of solar tracking controller which effectively combined the sun angle tracking and photo electric tracking based on ATmega8is designed.In the sunny days，the solar tracking con-troller determines the sun's position by using photosensitive resistances to collect light intensity and control stepper motors to achieve photo electric tracking，n cloudy days，it collects clock CHip PCF8583time information to calculate the current position of the sun and achieve the sun angle tracking.Experimental results show the solar tracking controller accurately tracks the sun in different weather conditions，improves received energy efficiency by30%and reaches the purpose of full use of solar energy.
上傳時(shí)間： 2013-10-15
上傳用戶：urgdil
設(shè)計(jì)一種基于P89V51RD2的功率因數(shù)測量儀，采用光電隔離器和專用數(shù)碼管驅(qū)動器。該測量儀是以增強(qiáng)型單片機(jī)P89V51RD2為核心，大大簡化系統(tǒng)硬件設(shè)計(jì)。而軟件部分采用模塊化設(shè)計(jì)思想，采用中值濾波和小數(shù)補(bǔ)償算法，實(shí)現(xiàn)功率因數(shù)的高精度測量。實(shí)驗(yàn)測試表明，該功率因數(shù)測量儀測量精度高，運(yùn)行穩(wěn)定可靠。 Abstract: A power－factor measurement instrument based on P89V51RD2is designed，which uses optical coupler and specific LED drive CHip.The power factor measurement instrument uses P89V51RD2as a core of which greatly simplifies the system design.Furthermore，modularization software is developed in detail.The high precision power－factor measuring system is realized by the center value filter and fractional compensation algorithm.Experiments manifests that the power－ factor measurement instrument is high precision，steady and reliable.
上傳時(shí)間： 2014-12-27
上傳用戶：CHINA526
實(shí)時(shí)時(shí)鐘是微機(jī)保護(hù)裝置的重要部件，在討論P(yáng)CF8583結(jié)構(gòu)與功能的基礎(chǔ)上，提出采用dsPIC33F系列微處理器與串行I2C時(shí)鐘PCF8583的接口設(shè)計(jì)方案，給出了相應(yīng)的接口電路與軟件流程。該設(shè)計(jì)方案結(jié)構(gòu)簡單，可靠性高，開發(fā)周期短，具有一定的實(shí)用與參考價(jià)值。所設(shè)計(jì)的微機(jī)保護(hù)裝置已投入現(xiàn)場運(yùn)行，效果良好。 Abstract: Real-time clock CHip is an important part in microcomputer protection device.Based on discussing the structure and function of PCF8583，a new interface scheme which uses dsPIC33F microprocessor and serial clock CHip（I2C）PCF8583is proposed.The method of the circuit design and the main software flow are introduced in this paper.The scheme has simple structure，higher reliability and shorter exploitation cycle，so has definite practicality or reference value.The microcomputer protection device has been put into operation with better effects.
標(biāo)簽： 8583 PCF 串行時(shí)鐘 中的應(yīng)用
上傳時(shí)間： 2013-11-18
上傳用戶：Thuan
設(shè)計(jì)一種基于AT89C52的語音錄放系統(tǒng)，利用單片機(jī)、ISD2560語音錄放器件、麥克風(fēng)、揚(yáng)聲器等元器件實(shí)現(xiàn)硬件電路的設(shè)計(jì)，并利用C51高級語言設(shè)計(jì)ISD2560器件控制字的寫入和定時(shí)中斷程序。經(jīng)軟硬件調(diào)試，結(jié)果表明該系統(tǒng)錄放效果良好，具有一定的工程實(shí)用價(jià)值。 Abstract: Voice recording and playback system based on AT89C52is designed in this paper.Using the single-CHip microcomputer，voice recording and playback CHip ISD2560，microphone and speaker to realize the hardware circuit design.Writing ISD2560control words and timing interrupt procedures are designed by C51advanced language.Through the hardware and software test,voice recording and playback system play better voice,and this system has some engineering practical values.
上傳時(shí)間： 2013-10-20
上傳用戶：ywcftc277
MG3500SoC是支持H.264高清編解碼器的片上系統(tǒng)，內(nèi)部集成一個(gè)嵌入式ARM926處理器，支持高清H.264編解碼、MPEG鄄2解碼和JPEG編解碼。介紹了MG3500SoC的主要性能特點(diǎn)、引腳排列、主要接口功能及在DVR上的應(yīng)用，以及MG3500SoC及其周圍器件的硬件設(shè)計(jì)，提出了在設(shè)計(jì)中應(yīng)注意的問題。 Abstract: The MG3500System-on-CHip（SoC）is high definition（HD）H.264codec,including ARM926-EJ processor，H.264encoder/decoder，MPEG2decoder and JPEG/MJPEG encoder/decoder.The features,pin assignments，interfaces and the typical application of MG3500in DVR are introduced in this paper.The application hardware circuit between the MG3500SoC and peripheral device are given,the questions which the syetem design needs to pay attention are explained.
上傳時(shí)間： 2013-11-12
上傳用戶：elinuxzj
詳細(xì)介紹了PCI9052接口器件的功能、結(jié)構(gòu)和使用方法，并結(jié)合實(shí)際給出了基于PCI9052器件開發(fā)PCI總線接口卡的應(yīng)用實(shí)例。 Abstract: The main functions,structures and usage of PCI9052inferface CHip are introduced in detail in this paper.And an application example of designing PCI bus interface card based on PCI9052is proposed in this paper.
上傳時(shí)間： 2013-10-16
上傳用戶：togetsomething
數(shù)字信號處理器dsPIC33F集多通道高精度A/D轉(zhuǎn)換、多通訊模式、看門狗、CMOS Flash技術(shù)等于一體，其內(nèi)部可完成所有數(shù)據(jù)操作，實(shí)現(xiàn)總線不出芯片技術(shù)。將該處理器應(yīng)用于微機(jī)保護(hù)裝置，提出基于dsPIC33F微處理器的微機(jī)保護(hù)裝置的設(shè)計(jì)方案，給出相應(yīng)的接口電路與軟件流程。該設(shè)計(jì)方案結(jié)構(gòu)簡單，性價(jià)比及可靠性高，開發(fā)周期短，具有一定的實(shí)用推廣價(jià)值。所研制的微機(jī)保護(hù)裝置現(xiàn)場運(yùn)行效果良好。 Abstract: The dsPIC33F microprocessor has a plentiful interior resource which contains multi-channel，high precision A/D converters，multi-communication module，watchdog，CMOS Flash technology，and so on.All data manipulations is accomplished interiorly.What is more，it makes the technology that bus does not go beyond the CHip comes into practice.The paper put forwards a design scheme based on dsPIC33F microprocessor.The scheme has the advantages of simple structure，high reliability and shortened exploitation cycle.What is more，it has definite practicality and reference.The microcomputer protection device has been put into operation with excellent effects.
上傳時(shí)間： 2013-11-16
上傳用戶：開懷常笑
提出一種基于C8051F040的炮塔方位角測試系統(tǒng)的設(shè)計(jì)方案，給出測試系統(tǒng)的各個(gè)模塊軟硬件設(shè)計(jì)。炮塔方位角測試系統(tǒng)集數(shù)據(jù)采集，數(shù)據(jù)傳輸和數(shù)據(jù)顯示等功能于一體，實(shí)現(xiàn)了炮塔方位角裝置的離線檢測。系統(tǒng)軟件采用C51編寫，對單片機(jī)進(jìn)行有效電源管理，保證了系統(tǒng)的穩(wěn)定性，可靠性。 Abstract: This paper puts forwards a design of artillery position system based on C8051F040，describes all modules hardware and software design of measurement system.The system has the function of information collection，transmission，and display.It can measure artillery position system in offline.The system software using C51can manage the power of single CHip microcomputer，guarantee the stability，reliability.
標(biāo)簽： C8051F040 方位角 測試系統(tǒng)
上傳時(shí)間： 2014-12-27
上傳用戶：7891
介紹一種多功能音樂播放器，它是以AT89S52單片機(jī)為核心，并輔有一些外圍器件，采用匯編語言編寫程序，實(shí)現(xiàn)多功能音樂播放，歌曲自動循環(huán)播放和使用琴鍵自編曲目功能。此外，彩燈顯示歌曲節(jié)奏，按鍵跳轉(zhuǎn)到喜愛曲目，液晶顯示當(dāng)前播英文曲目。并給出了系統(tǒng)軟硬件設(shè)計(jì)。 Abstract: It introduces a multifunctional music player,taking AT89S52 single-CHip microcomputer as hardware control core and using some peripheral elements.Programmes are compiled in assembly language to act as expected.There are two functional modes in this system.One is to make the music play automatically and consecutively,the other is to compose new songs through keys.In addition,lights show the pace of music and the English names can be displayed in the liquid crystal screen.With perfect combination of hardware and software,the music player can meet many music lovers’needs for multifunctional music player.And the hardware and software of the system are given.
上傳時(shí)間： 2013-11-18
上傳用戶：xiaodu1124
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