步进电机控制系统 毕业论文终

步进电机控制系统专业计算机科学与技术姓名学号指导教师摘要A1A0A2A3A4A5A6A7A8A9A10A11A12A13A15A16A14A3A8A11A17A18A19A20A21A22A23A15A25A24A26A27A28A30A29A8A32A3A31A33A34A36A37A35A38A39A40A42A41A44A43A8A45A32A47A46A8A48A49A32A51A50A48A52A36A8A3A39A40A53A15A55A56A54A57A58A59A60A61A62A63A64A65A66A27A68A69A67A16A14A3A8A11A43A70A72A71A15A74A73A75A43A70A76A77A5A78A66A79A77A32A81A80A82A83A36A64A34A65A84A85A86A87A68A90A43A70A72A71A11A88A6A15A92A89A91A88A6A5A93A91A88A6A94A95A96A97A98A68A55A53A15A89A91A88A6A99A85A102A100A101A103A8A104A105A72A71A32A108A106A43A70A107A109A32A16A14A3A8A110A31A107A109A32A44A111A112A113A107A109A36A114A82A107A109A11A88A6A15A42A41A89A91A3A115A56A3A115A118A116A11A117A119A68A93A91A88A6A102A100A99A120A121A42A41A54A57A107A109A11A43A70A120A121A15A104A122A117A119A74A16A14A3A8A123A31A124A125A41A123A31A79A77A11A43A70A15A128A126A127A16A14A3A8A11A123A31A79A77A31A129A112A113A56A132A130A131A44A111A133A116A68A90A72A71A34A65A134A82A135A32A117A27A135A41A138A136A135A11A137A139A68关键词A16A14A3A8A32A101A103A8A32A123A79A43A70A32A124A125A43A70目录第一章引言错误未定义书签。11问题的提出错误未定义书签。12设计目的及系统功能错误未定义书签。第二章硬件电路设计621硬件设计思路622总体设计框图623单片机系统7231单片机概述7232AT89S52单片机824步进电机14241步进电机概述14242步进电机的特性14243步进电机的种类15244永磁步进电机的控制15245与直流电机的比较1725外围电路设计及分析19251键盘控制电路19252步进电机驱动电路20253LED数码显示电路2226步进电机控制系统电路图2427步进电机控制系统实物图24第三章软件设计2531程序设计思路2532程序流程图25321主程序流程图25322读键盘子程序流程图26323键盘处理子程序流程图27324电机控制中断程序流程图28325数码显示中断程序流程图29第四章调试与改进3141调试与改进3142运行结果32第五章开发总结及心得体会33致谢错误未定义书签。参考文献错误未定义书签。THECONTROLSYSTEMOFMAGNETICSTEPPINGMOTOR错误未定义书签。附录程序清单错误未定义书签。A140A141A142A143A142A144A142A145A146A147A148A1492设计的步进电机控制系统有以G991功能G7261步进电机的G2563G1584控制2G714步进电机的G8503G2465G17728控制3步进电机的G2164G17907控制4步进电机的G1955G17907控制5步进电机G17728G17907的动G5589显示A140A141A142A143A142A144A142A145A146A147A148A1493第二章方案论证与比较1、步进电机的选择G7053G7708一G726G17885G6333G2465G5224G5347步进电动机G708G57RG709G452G18331G11004G20652G4560磁G7460G7021G7512G6116G21843G10378G17728子G2656G4462子G712G1866结G7512G12628单G712G10995G1147G6116G7424G1314G712步G17329G16294G2499以G1582的G11468G5415G4579G712G1306动G5589性能G11468G4557较G5058G452G7053G7708二G726G17885G6333永磁G5347步进电动机G708PMG709G452G17728子G18331G11004G3822磁G7509的G3290G12582G5430的永磁G19093G712G3324G1866外G1403G18209G13634G21843G10378G4462子G452G11004G17728子G2656G4462子G1055G19400的G2572引G2656G6502G7033G2159G1147G10995G17728动G712G17728动步的G16294G5242一G14336G7171750G452G4439的出G2159G3835G712动G5589性能G3921G727G1306步G17329G16294一G14336比较G3835G452G7053G7708三G726G17885G6333G9163G2524步进电动机G708HG37G709G452G17837G7171PMG2656G57R的G3809G2524G1147G2709G712G1866G17728子G18331G11004G21843G10378的G12244G3315永磁G7460G7021G712G4462子G2029G1038G21843G10378的G12373G17227结G7512G452G8504类电机G13520G2524G1114G2465G5224G5347G2656永磁G5347G1016G13785的G1260G9869G712步G17329G16294G4579G712出G2159G3835G712动G5589性能G3921G712G7171性能较G3921的一类步进电动机G712G3324计G12651机G11468G1863的设G3803中G3822G11004G8504类电机G452G11013G1122永磁G5347步进电机的动G5589性能比较G3921G712G13792G1000结G7512G11468G4557比较G12628单G712G1227G7696G17878中G712G7171电子G1006G1325G10245G3921G13785中G5132G11004的步进电机G452G6937G3324G8504G17885G11004永磁G5347步进电机G4522G451单片机的选择G7053G7708一G726G17885G6333ARM7TDMIS3C44G37OG59单片机S3C44G37OG59单片机G2265G2559ARM7TDMI处理G3132G452ARM7TDMI处理G3132G7171ARMG1856G2508G17902G11004的32G1313G5506处理G3132G4490G7075的G6116G2604G1055一G712G7171一种G20652性能G451G5277G1227G451G1314功G13803的RISC处理G3132G712G2528G7114G2460G1867有非G5132丰富的片上资源G712非G5132G17878G2524嵌入G5347G1147G2709的开发G452G7053G7708二G726G17885G6333AT89S52单片机AT89S52G7171一种带8K字节闪烁G2499编程G2499擦除只读存储G3132G708FPEROMFALSHPROGRAMMABLEANDERASABLEREADONLYMEMORYG709的G1314电压G712G20652性能CMOS8G1313G5506处理G3132G712俗A150A151A152A153A152A154A152A155A156A157A158A1594称单片机G452G4439的G2499擦除只读存储G3132G2499以G2465G3809擦除1000次G452该G3132件G18331G11004ATMELG20652密G5242非易失存储G3132制造技术制造G712与工G1006标准的MCS51指令集G2656输出管脚G11468兼容G452G11013G1122AT89S52的结G7512G12628单G451G1227G7696G17878中G451G20652性能G712G6937G3324G8504G17885G6333AT89S52单片机G4523、步进电机驱动电路的设计G7053G7708一G726使G11004G3822个功率放G3835G3132件驱动电机G17902过使G11004不G2528的放G3835电路G2656不G2528参数的G3132件G712G2499以达到不G2528的放G3835的要求G712放G3835后能够得到较G3835的功率G452G1306G7171G11013G1122使G11004的G7171四G11468的步进电机G712就需要G4557四路信号分别进行放G3835G712G11013G1122放G3835电路很难G1582到完全一致G712G5415电机的功率较G3835G7114运行G17227来会不稳G4462G712G13792G1000电路的制作也比较G3809杂G452G7053G7708二G726使G11004ULN2803八NPN达林顿连接晶体管驱动电机ULN2803八NPN达林顿连接晶体管G7171G1314逻辑电平数字电路G708如TTL,CMOS或PMOS/NMOSG709G2656G3835电流G20652电压要求的灯G451继电G3132G451打印机锤G2656G1866他类似负载G19400的接口的理想G3132件G452广泛G11004G1122计G12651机G712工G1006G2656消费类G1147G2709中G452所有G3132件有集电G7509开路输出G2656G11004G1122瞬变抑制的续流箝G1313二G7509管G452ULN2803的设计与标准TTL系列兼容。G11013G1122ULN2803八NPN达林顿连接晶体管的结G7512G12628单G13792G1000能G1038步进电机提供脉冲信号G712进G13792将脉冲G17728化G1038步进G16294G5242G712从G13792能控制步进电机G17728动G452G6937G17885G6333ULN2803八NPN达林顿连接晶体管作G1038所需单片机G4524、数码管显示电路的设计G7053G7708一G726共阳G7509接G8873G452G6238发G1821二G7509管的阳G7509连G3324一G17227G7512G6116G1856共阳G7509G712使G11004G7114G1856共阳G7509接G145G57G712G8611个发G1821二G7509管的G19464G7509G17902过电G19471与输入G12483G11468连G452G5415G19464G7509G12483输入G1314电平G7114G712G8585发G1821二G7509管就G4560G17902G9869G1154G712G13792输入G20652电平G7114G2029不G9869G1154G452G7053G7708二G726共G19464G7509接G8873G452G6238发G1821二G7509管的G19464G7509连G3324一G17227G7512G6116G1856共G19464G7509G712使G11004G7114A150A151A152A153A152A154A152A155A156A157A158A1595G1856共G19464G7509接G3332G452G8611个发G1821二G7509管的阳G7509G17902过电G19471与输入G12483G11468连G452G5415阳G7509G12483输入G20652电平G7114G712G8585发G1821二G7509管就G4560G17902G9869G1154G712G13792输入G1314电平G7114G2029不G9869G1154G452G3324G7424设计中所G18331G11004的G7171共阳G7509LED数码显示G3132G712G1866G1881G18108结G7512如图212所示G726A160A161A162A163A161A164A165A166A167A168A169A170A171A160G3324G7424设计中G712数码显示电路G17902过G1144G7379G2533P26G2656P27输出G1314电平G712使得与G17837G1016个G12483口连接的三G7509管G1144G7379G4560G17902G712从G13792G1038数码管提供电源G712也实G10628G1114数码管的动G5589G6207G6563G452G17902过P1口输出G8585G17885信号G712控制G1114数码管显示的G1881容G452A150A151A152A153A152A154A152A155A156A157A158A1596第三章硬件电路设计31硬件设计思路步进电机控制系统共分G1038四个G8181G3371G726单片机G7380G4579系统G8181G3371G451键盘控制G8181G3371G451数码显示G8181G3371G451步进电机驱动G8181G3371G452单片机G7380G4579系统主要G11013G3809G1313电路G2656G7114G19059电路G13464G6116G452G3809G1313电路G1038单片机系统提供G2499G19764G3809G1313G712使单片机能G8503G5132G2563动G452G7114G19059电路G18331G11004外G18108G7114G19059G7053G5347G712G1457G16789单片机个功能G18108件G18129G7171以G7114G19059G20069率G1038G3534准G712有G7477不G13022G3332一G6305一G6305G3332工作G452键盘控制G8181G3371G2265G6336G2563G1584键G451G7053G2533控制键G451G2164G17907键G2656G1955G17907键G712分别与单片机的P20G451G8321G451G8322G2656P23G11468连G452实G10628G4557步进电机的控制G452G5194G1000键盘上连接有发G1821二G7509管G712以指示键盘G10378G5589G452数码显示G8181G3371G18331G11004共阳G7509数码管来动G5589显示步进电机的实G19481G17728动G17907G5242G452G2045G11004三G7509管G1038数码管的G70OMG12483提供G20652电平G452单片机的P1口提供数码管的G8585G17885信号G712P26G2656P27控制数码管的G1313G17885信号G452步进电机驱动G8181G3371G17885G11004八NPN达林顿连接晶体管2803G1038步进电机提供脉冲信号G712驱动步进电机G17728动G452该G8181G3371与单片机的P34P37G11468连G45232总体设计框图总体设计框图如图21所示G452A160A161A162A163A172A173A174A175A176A160AT89S52A177A178A179A180A181A182A183A184A185A186A181A182A167A168A187A188A181A182A150A151A152A153A152A154A152A155A156A157A158A1597G16840G7138如G991G7261单片机接G2475键盘信G5699G712改变系统G1881G18108变G18339G1552G4522单片机输出脉冲信号G712控制步进电机G17728动G4523单片机G7693G6466步进电机实G19481G17728动G1552G712控制数码管显示G45233单片机系统331单片机概述目G2081G712单片机G8503G7409G11540G20652性能G2656G3822G2709种G7053G2533发G4649G17247G2195将G7171进一步G2533G11540CMOS化G451G1314功G13803G451G4579体G12227G451G3835容G18339G451G20652性能G451G1314G1227G7696G2656外围电路G1881G16025化G12573G1972个G7053G19766发G4649G452G991G19766G7171单片机的主要发G4649G17247G2195G452G17829G5192G712G11013G1122CHMOS技术的进步G712G3835G3835G3332G1431进G1114单片机的CMOS化G452CMOSG14467片除G1114G1314功G13803特性G1055外G712G17836G1867有功G13803的G2499控性G712使单片机G2499以工作G3324功G13803G12946G13466管理G10378G5589G452G17837也G7171G1182后以80C51G2474G12078051G1038标准MCUG14467片的G2419G3252G452G3252G1038单片机G14467片G3822数G7171G18331G11004CMOSG708G18341G4658G7641G8699化物G709G2334G4560体工G14414G10995G1147G452CMOS电路的特G9869G7171G1314功G13803G451G20652密G5242G451G1314G17907G5242G451G1314G1227G7696G452G18331G11004G2464G7509G3423G2334G4560体工G14414的TTL电路G17907G5242G5567G712G1306功G13803G2656G14467片G19766G12227较G3835G452G19555G11540技术G2656工G14414G8712平的提G20652G712G2460出G10628G1114HMOSG708G20652密G5242G451G20652G17907G5242MOSG709G2656CHMOS工G14414G452CHMOSG2656HMOS工G14414的结G2524G452目G2081G10995G1147的CHMOS电路G5062达到LSTTL的G17907G5242G712G1268输G5322G17843G7114G19400G4579G11222NSG712G4439的G13520G2524G1260G2195G5062G3324G1122TTL电路G452G3252G13792G712G3324单片机G20058G3507CMOSG8503G3324G17892G9188G2474G1207TTL电路G452G19555G11540G2334G4560体集G6116工G14414的不断发G4649G712单片机的集G6116G5242将G7368G20652G451体G12227将G7368G4579G451功能将列G5390G452G3324单片机G4490G7075中G7128051系列G7171G1866中的G1360G1360G13785G712G2164G1055ING87ELG1856G2508将G1866MCSG80251系列中的8051G1881G7692使G11004G7447以G999G2045G1126G6454或出G2818G5430G5347G17728G16765G13485全G1002G11040G16780G3822G14891G2529IC制造G2390G2842G712如PHG76LG76G83SG451NECG451AG87MELG451AMDG451G2338G18042G12573G712G17837G1135G1856G2508G18129G3324G1457G6357与8051单片机兼容的G3534G11796上改G2904G11148051的G16780G3822特性G452G17837G7691G7128051就变G6116有G1259G3822制造G2390G2842G6915G6357的G451发G4649出上G11346G2709种的G3835G4490G7075G712G10628统称G10388051系列G4528051单片机G5062G6116G1038单片机发G4649的主流G452G999G4490G16760G1038G712G15441G9994G1002G11040上的MCUG2709种G13333G3822G712功能G2520G5334G712开发G16025G13634也G1126不兼容G712G1306G7171G4470观发G4649表G7138G7128051G2499能G7380终G5430G6116事实上的标准MCUG14467片G452单片机G7171G5506G3423机的一个主要分G6915G712G3324结G7512上的G7380G3835特G9869G7171G6238CPUG451存储G3132G451G4462G7114G3132G2656G3822种输入/输出接口电路集G6116G3324一G3371超G3835规G8181集G6116电路G14467片上G452就G1866G13464G6116G2656功能G13792言G712A189A190A191A192A191A193A191A194A195A196A197A1988一G3371单片机G14467片就G7171一台计G12651机G452单片机G7171G17902过G1881G18108总线G6238计G12651机的G2520主要G18108件接G1038一体G712G1866G1881G18108总线G2265G6336G3332址总线G451数G6466总线G2656控制总线G452G1866中G712G3332址总线的作G11004G7171G3324进行数G6466G1144G6454G7114提供G3332址G712CPUG17902过G4439们将G3332址输出到存储G3132或I/O接口G727/数G6466总线的作G11004G7171G3324CPU与存储G3132或I/O接口G1055G19400G712或存储G3132与外设G1055G19400G1144G6454数G6466G727控制总线G2265G6336CPU发出的控制信号线G2656外G18108送入CPU的G5224答信号线G12573G452单片机作G1038计G12651机发G4649的一个重要G20058G3507G712G5224G11004一个较科学的分类G7053G8873G452G7693G6466目G2081发G4649情况G712从不G2528G16294G5242单片机G3835致G2499以分G1038G17902G11004G3423/G999G11004G3423G451总线G3423/非总线G3423及工控G3423/G4490电G3423G452G11013G1122单片机G1867有显G14891的G1260G9869G712G4439G5062G6116G1038科技G20058G3507的有G2159工G1867G712人类G10995活的得G2159助手G452G4439的G5224G11004遍及G2520个G20058G3507G712单片机G5062G6116G1038计G12651机发G4649G2656G5224G11004的一个重要G7053G19766G452另一G7053G19766G712单片机G5224G11004的重要意义G17836G3324G1122G712G4439从G7693G7424上改变G1114G1268统的控制系统设计思想G2656设计G7053G8873G452从G2081必须G11013G8181拟电路或数字电路实G10628的G3835G18108分功能G712G10628G3324G5062能G11004单片机G17902过软件G7053G8873来实G10628G1114G452G17837种软件G1207G7379硬件的控制技术也称G1038G5506控制技术G712G7171G1268统控制技术的一次革命G452332AT89S52单片机8051G7171早期的G7380典G3423的G1207表作G712G11013G1122MCS51单片机影响G7509深远G712G16780G3822G1856G2508G18129推出G1114兼容系列单片机G712就G7171G16840MCS51G1881G7692实G19481上G5062经G6116G1038一个8G1313单片机的标准G452很G3822G1856G2508的51单片机G1147G2709G18129G7171G2656MCS51G1881G7692兼容的G1147G2709G452G2528G7691的一G8585程序G712G3324G2520个单片机G2390G4490的硬件上运行的结果G18129G7171一G7691的G712如ATMEL的89S52G712PHILIPSG708菲G2045浦G709G712G2656WING37ONDG708G2338G18042G709G12573G712我们G5132G16840的89S52指的G7171ATMELG1856G2508的AT89S52单片机G712G2528G7114G7171G3324G2419G3534G11796上增G5390G1114G16780G3822特性G712如G7114G19059G712G7368G1260秀的G7171G11013FLASHG708程序存储G3132的G1881容至少G2499以改写1000次G709存储G3132G2474带G1114G2419来的ROMG708一次性写入G709G712AT89S52的性能G11468G4557G11228051G5062经G12651G7171非G5132G1260越的G1114G452AT89S52G7171一种带8K字节闪烁G2499编程G2499擦除只读存储G3132G708FPEROMFALSHPROGRAMMABLEANDERASABLEREADONLYMEMORYG709的G1314电压G712G20652性能CMOS8G1313G5506处理G3132G712俗称单片机G452G4439的G2499擦除只读存储G3132G2499以G2465G3809擦除1000次G452该G3132件G18331G11004ATMELG20652密G5242非易失存储G3132制造技术制造G712与工G1006标准的MCS51指令集G2656输出管脚G11468兼容G452G11013G1122将A199A200A201A202A201A203A201A204A205A206A207A2089G3822功能8G1313CPUG2656闪烁存储G3132G13464G2524G3324单个G14467片中G712ATMEL的AT89S52G7171一种G20652效G5506控G3132G712AT89S52单片机G1038很G3822嵌入G5347控制系统提供G1114一种灵活性G20652G1000G1227G5277的G7053G7708G452A209A210A211A210A212A213A214A215A216A217A210A218A219A209单片机G1881G18108结G7512图G1038如图23所示G726A209A210A211A220A221A222A223A224A225A226A227A209A199A200A201A202A201A203A201A204A205A206A207A208101G714主要特性G726与MCS51单片机G1147G2709兼容8K字节G2499编程FLASH存储G3132寿命G7261000写/擦循环全静G5589工作G7260HZ33HZ三级G2164密程序存储G31322568G1313G1881G18108RAM32G2499编程I/O线三个16G1313G4462G7114G3132/计数G3132八个中断源全G2464工UART串行G17902道G1314功G13803空闲G2656掉电G8181G5347看门狗G4462G7114G3132G2464数G6466指针2G714管脚G16840G7138G726G57CCG726供电电源G452GNDG726接G3332G452P0口G726P0口G1038一个8G1313漏级开路G2464G2533I/O口G712G8611脚G2499G2572收8TTL门电流G452G5415P1口的管脚第一次写1G7114G712被G4462义G1038G20652G19471输入G452P0能够G11004G1122外G18108程序数G6466存储G3132G712G4439G2499以被G4462义G1038数G6466/G3332址的第八G1313G452G3324FIASH编程G7114G712P0口作G1038G2419码输入口G712G5415FIASH进行校验G7114G712P0输出G2419码G712G8504G7114P0外G18108必须被拉G20652G452P1口G726P1口G7171一个G1881G18108提供上拉电G19471的8G1313G2464G2533I/O口G712P1口缓冲G3132能接收输出4TTL门电流G452P1口管脚写入1后G712被G1881G18108上拉G1038G20652G712G2499G11004作输入G712P1口被外G18108G991拉G1038G1314电平G7114G712将输出电流G712G17837G7171G11013G1122G1881G18108上拉的缘G6937G452G3324FLASH编程G2656校验G7114G712P1口作G1038第八G1313G3332址接收G452P2口G726P2口G1038一个G1881G18108上拉电G19471的8G1313G2464G2533I/O口G712P2口缓冲G3132G2499接收G712输出4个TTL门电流G712G5415P2口被写“1”G7114G712G1866管脚被G1881G18108上拉电G19471拉G20652G712G1000作G1038输入G452G5194G3252G8504作G1038输入G7114G712P2口的管脚被外G18108拉G1314G712将输出电流G452G17837G7171G11013G1122G1881G18108上拉的缘G6937G452P2口G5415G11004G1122外G18108程序存储G3132或16G1313G3332址外G18108数G6466存储G3132进行存G2474G7114G712P2口输出G3332址的G20652A199A200A201A202A201A203A201A204A205A206A207A20811八G1313G452G3324G13485出G3332址“1”G7114G712G4439G2045G11004G1881G18108上拉G1260G2195G712G5415G4557外G18108八G1313G3332址数G6466存储G3132进行读写G7114G712P2口输出G1866特殊功能寄存G3132的G1881容G452P2口G3324FLASH编程G2656校验G7114接收G20652八G1313G3332址信号G2656控制信号G452P3口G726P3口管脚G71718个带G1881G18108上拉电G19471的G2464G2533I/O口G712G2499接收输出4个TTL门电流G452G5415P3口写入“1”后G712G4439们被G1881G18108上拉G1038G20652电平G712G5194G11004作输入G452作G1038输入G712G11013G1122外G18108G991拉G1038G1314电平G712P3口将输出电流G708ILLG709G17837G7171G11013G1122上拉的缘G6937G452P3口也G2499作G1038AT89S52的一G1135特殊功能口G712如表21所示G726A228A210A211A229A230A220A231A232A225A233A234A235A231口管脚G3803G17885功能P30RG59D串行输入口P31TG59D串行输出口P32/INT0外G18108中断0P33/INT1外G18108中断1P34T0记G7114G31320外G18108输入P35T1记G7114G31321外G18108输入P36/WR外G18108数G6466存储G3132写G17885G17902P37/RD外G18108数G6466存储G3132读G17885G17902P3口G2528G7114G1038闪烁编程G2656编程校验接收一G1135控制信号G452RSTG726G3809G1313信号输入G12483G452G5415单片机运行G7114G712G3324G8504引脚G2164上G6357续G7114G19400G3835G1122G1016个机G3132周期的G20652电平G7171G712就G2499以完G6116G3809G1313操作G452G991图所示的G3809G1313电路兼有上电G3809G1313G2656按钮G3809G1313的G2464重功能G712G5194G1000G3324满足单片机G2499G19764G3809G1313的G2081提G991降G1314G1114G3809G1313引脚的G4557G3332G19471抗G712增G5390G1114G3809A199A200A201A202A201A203A201A204A205A206A207A20812G1313电路的抗干扰能G2159G712二G7509管的G17227到G5567G17907泄放电容电G18339的作G11004G712满足短G7114G19400G3822次G3809G1313操作的需求G452A209A210A211A236A237A238A239A240ALE/PROGG726G5415访问外G18108存储G3132G7114G712G3332址锁存允G16780的输出电平G11004G1122锁存G3332址的G3332G1313字节G452G3324FLASH编程期G19400G712G8504引脚G11004G1122输入编程脉冲G452G3324平G7114G712ALEG12483以不变的G20069率周期输出G8503脉冲信号G712G8504G20069率G1038振荡G3132G20069率的1/6G452G3252G8504G4439G2499G11004作G4557外G18108输出的脉冲或G11004G1122G4462G7114目的G452G9994G13792要注意的G7171G726G8611G5415G11004作外G18108数G6466存储G3132G7114G712将跳过一个ALE脉冲G452如想禁止ALE的输出G2499G3324SFR8EHG3332址上G136340G452G8504G7114G712ALE只有G3324执行MOG57G59G712MOG57C指令G7171ALE才G17227作G11004G452另外G712该引脚被略G5506拉G20652G452如果G5506处理G3132G3324外G18108执行G10378G5589ALE禁止G712G13634G1313无效G452/PSENG726外G18108程序存储G3132的G17885G17902信号G452G3324G11013外G18108程序存储G3132G2474指期G19400G712G8611个机G3132周期G1016次/PSEN有效G452G1306G3324访问外G18108数G6466存储G3132G7114G712G17837G1016次有效的/PSEN信号将不出G10628G452/EA/G57PPG726G5415/EAG1457G6357G1314电平G7114G712G2029G3324G8504期G19400外G18108程序存储G3132G7080000HFFFFHG709G712不管G7171否有G1881G18108程序存储G3132G452注意G2164密G7053G53471G7114G712/EA将G1881G18108锁G4462G1038RESETG727G5415/EAG12483G1457G6357G20652电平G7114G712G8504G19400G1881G18108程序存储G3132G452G3324FLASH编程期G19400G712G8504引脚也G11004G1122施G216412G57编程电源G708G57PPG709G452G59TAL1G726G2465G2533振荡放G3835G3132的输入及G1881G18108G7114G19059工作电路的输入G452G59TAL2G726来自G2465G2533振荡G3132的输出G452晶体震荡G3132电路如图25所示G712A199A200A201A202A201A203A201A204A205A206A207A20813A209A210A211A217A241A242A243A244A245A239A240A2093G714振荡G3132特性G726G59TAL1G2656G59TAL2分别G1038G2465G2533放G3835G3132的输入G2656输出G452该G2465G2533放G3835G3132G2499以G18209G13634G1038片G1881振荡G3132G452石晶振荡G2656陶瓷振荡均G2499G18331G11004G452如G18331G11004外G18108G7114G19059源驱动G3132件G712G59TAL2G5224不接G452有G1325输入至G1881G18108G7114G19059信号要G17902过一个二分G20069触发G3132G712G3252G8504G4557外G18108G7114G19059信号的脉宽无任何要求G712G1306必须G1457G16789脉冲的G20652G1314电平要求的宽G5242G4524G714G14467片擦除G726整个PEROM阵列G2656三个锁G4462G1313的电擦除G2499G17902过G8503确的控制信号G13464G2524G712G5194G1457G6357ALE管脚处G1122G1314电平10MS来完G6116G452G3324G14467片擦操作中G712G1207码阵列全被写“1”G1000G3324任何非空存储字节被重G3809编程以G2081G712该操作必须被执行G452G8504外G712AT89S52设有稳G5589逻辑G712G2499以G3324G1314到零G20069率的G7477件G991静G5589逻辑G712G6915G6357G1016种软件G2499G17885的掉电G8181G5347G452G3324闲G13634G8181G5347G991G712CPUG1584止工作G452G1306RAMG712G4462G7114G3132G712计数G3132G712串口G2656中断系统仍G3324工作G452G3324掉电G8181G5347G991G712G1457存RAM的G1881容G5194G1000冻结振荡G3132G712禁止所G11004G1866他G14467片功能G712直到G991一个硬件G3809G1313G1038止G452G3252G8504G3324G7424次设计中G11004AT89S52来作G1038该系统的G7692心处理G14467片G452如图26G726A20926AT89S52A246A247A239A240A209AT89S52P34P37A248A239A223A249A250A239A240P10P17A248A251A252A253A254A255A44EAA2485VRESETA248A237A238A239A240X1,X2A248A241A172A239A240P20P23A248A108A0A45A1A239A240P26,P27A248A251A252A253A238A255A44A199A200A201A202A201A203A201A204A205A206A207A2081434步进电机341步进电机概述步进电机G7171一种能够将电脉冲信号G17728G6454G6116G16294G1313移或线G1313移的机电元件G712G4439实G19481上G7171一种单G11468或G3822G11468G2528步电动机G452单G11468步进电动机有单路电脉冲驱动G712输出功率一G14336很G4579G712G1866G11004G17896G1038G5506G4579功率驱动G452G3822G11468步进电动机有G3822G11468G7053G8886脉冲驱动G712G11004G17896很广G452使G11004G3822G11468步进