【正文】 74LS21 芯片介紹 .................................................................................... 23 第 3 章 軟件編程及調(diào)試 ............................................................................................ 25 167。 器件選擇及介紹 ............................................................................................. 18 167。 籃球賽計(jì)時(shí)計(jì)分器電路工作過程 ................................................................. 6 167。 籃球賽計(jì)時(shí)計(jì)分器設(shè)計(jì)的現(xiàn)狀 ............................................................. 2 167。 t hree is st rict ly m ot or vehicle ident if icat ion m anagement , equipped wit h unif ied of ident if icat ion equipm ent and t ool, using mobile ident if icat ion Ter minal, and law enf or cement r ecor ds inst r ument, t echnology ident if ication m eans. As t o 20XX year s J une 20 st atewide m ot or vehicle keep volum e f or 567,408 car, and last year ear lier t han growt h 75,814 car, gr owth 13. 36%。 t hree is st rict ly m ot or vehicle ident if icat ion m anagement , equipped wit h unif ied of ident if icat ion equipm ent and t ool, using mobile ident if icat ion Ter minal, and law enf or cement r ecor ds inst r ument, t ec hnology ident if ication m eans. As t o 20XX year s J une 20 st atewide m ot or vehicle keep volum e f or 567,408 car, and last year ear lier t han growt h 75,814 car, gr owth 13. 36%。 t o expand the br eadth and dept h of t he por tal syst em , inf or mat ion syst em of Enter prise M anagem ent Assistant r ole t o play。 I I is est ablished m otor vehicle t est r egulat or y plat f or m, achieved m ot or vehicle t est f ul pr ocess video, and data r emot e r egulat ory。 關(guān)鍵詞 ： 單片機(jī)，計(jì)時(shí)，計(jì)分，顯示器，接口 evaluat ion of scient if ic developm ent . Natur e secur it y t ype natur e securit y is t o m aint enance people of healt h value f or t arget , t hrough st rengthening secur it y based m anagement , and r isk m anagement , and equipm ent m anagement and t echnology super vision, ensur e pr oduction in t he people, and r eal, and syst em, and system, elem ent s secur it y reliable, and har m ony unif ied, f ul cont rol var ious against f actor s, achieved t hought no slack, and management no em pty document , and equipm ent no hidden, and syst em no blocked, and unit zer o nonst opped. Qualit y and ef f iciencyqualit y benef it is t o adhere t o t he enter prise survival, pr ofit and developm ent business t rut h, adher e t o t he all act ivit y is econom ic activit y, all cost s can be cont roled, m oney should not be wast ed m anagement philosophy, m anagement analysis, t o im prove management qualit y, im prove cost contr ol capacit y and mar ket petit iveness. Innovation of science and t echnology science and t echnology innovation is t o play t he r ole of science and t echnology as t he pr im ary pr oduct ive f orce, act ive use of new t echnologies, new m at er ials, new pr oces ses, new equipm ent , incr ease invest ment in science and t echnology, st rengthening scientif ic and t echnological t raining, speeding up t ransfor ming scient if ic and t echnological achievement s, f or ming a num ber of pr opr ietar y technology, enhancing cor e petit ivenes s. Resour cesaving the resources saving ent erpr ise was t o r educe coal consumpt ion, wat er consum ption, elect ricit y at t he cor e, enhance t he oper ation of lean m anagem ent t o r ealize low consum pt ion, high ef ficiency, r educe pr oduction costs. Second is t o st rengthen t he business, f inancial, m ater ial, inf orm at ion and t he opt imizat ion of or ganizat ion and management, saving t he int er nal t r ansact ion costs. Har m onious development of harm onious development is t o const ruct a for eign envir onment f or development . XI NG r ef ers t o t he int er nal secur it y f ir m and int er nal m anagement of t he int ernal m anagem ent m easur es ar e ef f ect ive, har monious. For eign cur ency m eans Enter prise coor dinat ing development of homeopathy, well, get along wit h t he neighbor s bet ter. (B) XX 2021 f ive enter prises building int r insic saf et y power pany goals ar e: unplanned outage 0 t im es. Class of disor ders 0, 0 is equivalent f orced out age r ate. No per sonal inj ur y accident , m ater ial and equipm ent accident s do not occur, no f ir e, no envir onmental polut ion accident . Enter prise int egr at ed t o achieve zer o cases of violat ion, zer o accident s, zero. Qualit y goal is: when gener at ing capacit y ≥ 7. 5 bilon kilowat t , sales of over 7. 11 bilon kWh, t ot al pr of it s of ≥ m ilon Yuan, . . BFS++、 PI、 M IS、 SCM Inf orm at ion systems inf r ast ruct ure, f uly int egr at ed inf or mat ion syst em t o r ealize inf or m ation r esources shar ing。本設(shè)計(jì)中系統(tǒng)硬件電路主要由以下幾個(gè)部分組成：單片機(jī)AT89C5 計(jì)時(shí)電路 、 計(jì)分電路 、 報(bào)警電路和按鍵開關(guān) 。 系統(tǒng)采用模塊化設(shè)計(jì)，主體分為計(jì)時(shí)顯示模塊、計(jì)分顯示模塊、定時(shí)報(bào)警、按鍵控制鍵盤模塊。 super vision Sur vey Sect ion r elies on m ot or vehicle det ect ion r emot e issued t est qualif ied logo sof t war e plat f orm super vision m ot or vehicle t est , and ident if icat ion sit uation 7418l iangci, invest igat ion m ot or vehicle exception business 30 car t im es, his par ds business war ning 244 ar ticle, vehicles and dr iving people sound video r egulat or y scr eenshot s 1852 Zhang, checks m otor vehicle ar chives 716 pieces t im es, and m edium bus, and m edium above t r uck, and Of hazar dous chemicals, vehicles and school buses and ot her key vehicle inspection r ecor d of 420. ( C) based on t heir own, and st rict adher ence t o def ense, m ore cheating, f alse f alse f ugit ive suspects, r obber y suspect vehicles and t he I nt er cr ackdown. DM V f ul play t o t he f ir st line of Def ense posit ion cont r ol, invest igating cheating, f ake ident if icat ion and r obbery suspect vehicles t hr ough oper ational wor k, and car efuly exam ine t he docum ent s and legal pr oof