全定制数字钟芯片设计__计时部分

本科毕业设计（论文）全定制数字钟芯片设计——计时部分学院材料与能源学院专业微电子学年级班别09级（2）班学号3109007507学生姓名苏辉龙指导教师陈先朝2013年06月全定制数字钟芯片设计——计时部分苏辉龙材料与能源学院曹中明材料与能源学院I摘要数字钟是一种用数字显示时﹑分﹑秒的记时装置，与传统的机械钟相比，他具有走时准确﹑显示直观﹑无机械传动装置、使用寿命更长等优点，因而得到了广泛的应用。小到人们的日常生活中的电子手表，大到车站﹑码头﹑机场等公共场所的大型数显电子钟。本文用正向设计的方法设计数字钟芯片，实现了时、分、秒的计时功能，整个数字钟芯片由脉冲产生电路、分频电路、译码显示电路、校正电路等组成。脉冲是由晶体振荡器产生，分和秒用的60进制计数器是用两个二分频电路，一个三分频电路和一个五分频电路级联实现的。而24进制计数器是用一个三分频电路，一个二分频电路和一个五分频电路来实现。利用TannerPro这个软件，分别绘制出计时部分的二分频电路、三分频电路、五分频电路以及级联这些分频电路绘制出六十分频和二十四分频电路。接着，分别对这些电路实现仿真，均能实现分频功能。最后使用L-Edit画出六十进制、二十四进制计数器的版图，并进行设计规则检查和版图与电路一致性检查（LVS）。关键词：数字钟，芯片设计，全定制，版图IIAbstractDigitalClockisadigitaldisplaydeviceofminutes,seconds,hour.Comparedwiththetraditionalmechanicalclock,itisaccurate,directdisplay,nomechanicaltransmissiondevice.Ithavetheadvantagesoflongservicelife.Thereforeithasbeenwidelyused.Smallelectronicwatchplayanimportantroleinpeople’sdailylives,suchasthestation,wharf,airport,publicplaces.Thispaperusestop-downdesignmethodtodesigndigitalclockchip,Theclockhasdisplayofthehours,minutes,secondsandtimingfunction.Thewholedigitalclockchipisconsistedofpulsecircuit,frequencydivisioncircuit,decodingdisplaycircuit,correctingcircuit.Pulseisgeneratedbythecrystaloscillator.The60counterisusedwithtwobinaryfrequencycircuit,fivebinaryfrequencycircuitandthreebinaryfrequencycircuit.The24counterisusedwithtwobinaryfrequencycircuit.Theprojectisdesignwithtwobinaryfrequencycircuit,threebinaryfrequencycircuitandfivebinaryfrequencycircuitonTannerPro.Theyarecombinedintothe60counterand24counter.Thesecircuitsaresimulatedandtested.Finallythe60counterandthe24counterarelayoutonL-Edit.TheyallpassthedesignruleandtheLVS.Keyword:Digitalclock,Chipdesign,Full-custom,LayoutIII目录1绪论....................................................................................................................................11.1课题背景......................................................................................................................11.1.1世界集成电路产业结构的变化及其发展历程................................................11.1.2我国集成电路产业现状....................................................................................21.1.3全定制法.............................................................................................................21.2课题介绍......................................................................................................................31.3论文思路及研究内容..................................................................................................32总电路设计............................................................................................................................62.1脉冲的产生..................................................................................................................62.1.1石英晶体振荡器................................................................................................62.1.2秒脉冲的产生...........................................................................................................72.2分频电路.......................................................................................................................82.3译码显示电路..............................................................................................................82.3.1数码显示器的介绍...................................................................................................82.3.2十进制七段译码显示...............................................................................................92.3.3六进制译码显示电路.............................................................................................112.3.4三进制七段译码显示电路.....................................................................................132.4校时电路....................................................................................................................143计时部分设计......................................................................................................................173.1二分频触发器的电路原理........................................................................................173.2二进制加法计数器分频原理....................................................................................183.3六十分频电路............................................................................................................203.3.1用最少的触发器实现的六十分频电路..........................................................203.3.2用最少的逻辑门实现的六十分频电路..........................................................233.4二十四进制分频电路................................................................................................293.5分频电路功耗分析....................................................................................................31IV4版图设计...............................................................................................................................324.1计时部分版图设计....................................................................................................324.1.1二分频版图设计.....................................................................................................324.1.2三分频版图设计.........................................