2、查正(zheng)常(chang)的595輸(shu)出(chu)(chu)腳(jiao)(jiao)與異常(chang)的595輸(shu)入(ru)腳(jiao)(jiao)是(shi)否(fou)(fou)有(you)通(tong)開(kai)機：（1）先打(da)開(kai)顯示(shi)(shi)(shi)(shi)(shi)器，再打(da)開(kai)電(dian)(dian)(dian)腦(nao)主機。（2）啟動LED面板(ban)、進入(ru)顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)編(bian)播軟件(jian)，打(da)開(kai)編(bian)輯好的文件(jian)，并(bing)運(yun)(yun)行(xing)節目(mu)單(dan)(dan)。（3）打(da)開(kai)顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)**開(kai)關(guan)，給(gei)顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)供電(dian)(dian)(dian)。關(guan)機：（1）先關(guan)顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)**開(kai)關(guan)。（2）退出(chu)(chu)顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)**編(bian)播軟件(jian)，并(bing)退出(chu)(chu)所(suo)(suo)(suo)有(you)程序(xu)。（3）關(guan)閉電(dian)(dian)(dian)腦(nao)主**閉顯示(shi)(shi)(shi)(shi)(shi)器。（4）關(guan)斷所(suo)(suo)(suo)有(you)與顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)設(she)備(bei)連接(jie)的電(dian)(dian)(dian)源。注意事項：（1）必須嚴格(ge)按照開(kai)關(guan)機順序(xu)進行(xing)顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)的操作。（2）顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)在運(yun)(yun)行(xing)中，請勿帶電(dian)(dian)(dian)插(cha)拔系統板(ban)卡及顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)連接(jie)的所(suo)(suo)(suo)有(you)設(she)備(bei)。（3）顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)**電(dian)(dian)(dian)腦(nao)不(bu)允許(xu)玩**及安裝與顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)不(bu)相(xiang)關(guan)的軟件(jian)，防止**侵入(ru)電(dian)(dian)(dian)腦(nao)，以免(mian)影響顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)的正(zheng)常(chang)運(yun)(yun)行(xing)。（4）未經本(ben)公(gong)司許(xu)可，不(bu)得擅自拆除、挪(nuo)動與顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)有(you)關(guan)的所(suo)(suo)(suo)有(you)設(she)備(bei)。故障(zhang)現(xian)象：1、單(dan)(dan)元板(ban)出(chu)(chu)現(xian)一條行(xing)長亮、暗亮、不(bu)亮。檢(jian)查維修：（1）目(mu)測單(dan)(dan)元板(ban)上的行(xing)管(guan)引出(chu)(chu)腳(jiao)(jiao)是(shi)否(fou)(fou)虛(xu)焊(han)；如果是(shi)，將(jiang)引腳(jiao)(jiao)焊(han)好。（2）用萬(wan)用表(biao)測量行(xing)管(guan)輸(shu)出(chu)(chu)端(duan)是(shi)否(fou)(fou)和(he)模(mo)塊腳(jiao)(jiao)有(you)通(tong)，如沒通(tong)：用數據線(xian)連上，如有(you)通(tong)，再測是(shi)否(fou)(fou)和(he)地短(duan)路(lu)，如無，測電(dian)(dian)(dian)壓是(shi)否(fou)(fou)正(zheng)常(chang)（萬(wan)用表(biao)測量方法：黑表(biao)筆(bi)(bi)接(jie)GND、紅表(biao)筆(bi)(bi)去測量各個管(guan)腳(jiao)(jiao)的電(dian)(dian)(dian)壓）；如是(shi)，則判(pan)斷行(xing)輸(shu)出(chu)(chu)端(duan)與所(suo)(suo)(suo)對應的模(mo)塊管(guan)腳(jiao)(jiao)斷路(lu)；如否(fou)(fou)，測量行(xing)管(guan)的輸(shu)入(ru)端(duan)是(shi)否(fou)(fou)正(zheng)常(chang)；如是(shi)。商(shang)業(ye)宣傳好幫(bang)手！碩百(bai) LED 屏(ping)(ping)(ping)適配商(shang)場、門頭(tou)，信息發(fa)布醒目(mu)吸睛。上海(hai)透明LED顯示(shi)(shi)(shi)(shi)(shi)屏(ping)(ping)(ping)批發(fa)

    在(zai)(zai)奉賢(xian)區域積累了(le)豐富的(de)(de)(de)(de)項目經驗與(yu)良好**，上(shang)(shang)海碩百光電科(ke)技(ji)(ji)有限(xian)公(gong)司已與(yu)金(jin)匯(hui)鎮(zhen)、南橋鎮(zhen)、莊(zhuang)行鎮(zhen)等多(duo)個(ge)(ge)(ge)鎮(zhen)的(de)(de)(de)(de)農業農村服務(wu)(wu)中心建立穩定合(he)(he)作關(guan)系，合(he)(he)作項目數均達到(dao)(dao)7個(ge)(ge)(ge)以(yi)上(shang)(shang)。針對區域內農業發(fa)展、商(shang)(shang)(shang)業運(yun)營、公(gong)共服務(wu)(wu)等需求，提(ti)供適配(pei)的(de)(de)(de)(de)LED顯示(shi)屏(ping)產品(pin)(pin)，如農業指(zhi)揮中心的(de)(de)(de)(de)拼接屏(ping)、鄉鎮(zhen)服務(wu)(wu)大(da)廳的(de)(de)(de)(de)信(xin)息展示(shi)屏(ping)、商(shang)(shang)(shang)場(chang)的(de)(de)(de)(de)廣告屏(ping)等。憑借(jie)可(ke)靠的(de)(de)(de)(de)產品(pin)(pin)質量(liang)與(yu)本地(di)化(hua)(hua)服務(wu)(wu)能(neng)力，深(shen)度(du)融入奉賢(xian)區域發(fa)展，成為當地(di)眾(zhong)多(duo)政企單(dan)位的(de)(de)(de)(de)推薦合(he)(he)作伙伴。在(zai)(zai)電工(gong)電氣領域深(shen)耕多(duo)年，上(shang)(shang)海碩百光電科(ke)技(ji)(ji)有限(xian)公(gong)司始終(zhong)保持(chi)(chi)(chi)良好的(de)(de)(de)(de)商(shang)(shang)(shang)業**，秉持(chi)(chi)(chi)“不斷銳(rui)意進取(qu)、持(chi)(chi)(chi)續制(zhi)造(zao)創(chuang)新”的(de)(de)(de)(de)發(fa)展理(li)念。公(gong)司信(xin)奉“爭取(qu)每(mei)一(yi)個(ge)(ge)(ge)客戶不容易，失去每(mei)一(yi)個(ge)(ge)(ge)用(yong)戶很簡單(dan)”的(de)(de)(de)(de)服務(wu)(wu)理(li)念，將(jiang)質量(liang)視為企業生命，在(zai)(zai)產品(pin)(pin)研發(fa)與(yu)服務(wu)(wu)優化(hua)(hua)上(shang)(shang)持(chi)(chi)(chi)續。從(cong)(cong)技(ji)(ji)術創(chuang)新到(dao)(dao)質量(liang)管控(kong)，從(cong)(cong)售前咨詢(xun)到(dao)(dao)售后，***的(de)(de)(de)(de)表現(xian)贏得了(le)客戶認(ren)可(ke)，也讓品(pin)(pin)牌在(zai)(zai)競爭激烈(lie)的(de)(de)(de)(de)市場(chang)中始終(zhong)保持(chi)(chi)(chi)**地(di)位。上(shang)(shang)海高(gao)清LED顯示(shi)屏(ping)節能(neng)標準奢(she)侈品(pin)(pin)店(dian)用(yong)碩百 LED 屏(ping)，播(bo)放品(pin)(pin)牌短片，助力提(ti)升客單(dan)價與(yu)**。

    注：可(ke)使(shi)用電(dian)壓(ya)檢(jian)(jian)(jian)測(ce)(ce)法較容易找到(dao)(dao)問題，檢(jian)(jian)(jian)測(ce)(ce)數(shu)據口(kou)(kou)的(de)(de)(de)電(dian)壓(ya)與(yu)(yu)正(zheng)(zheng)(zheng)常(chang)(chang)的(de)(de)(de)是(shi)(shi)否(fou)(fou)(fou)不(bu)(bu)同(tong)，確定故障(zhang)區域。K．輸(shu)(shu)(shu)出(chu)(chu)(chu)有(you)(you)(you)問題1、檢(jian)(jian)(jian)測(ce)(ce)輸(shu)(shu)(shu)出(chu)(chu)(chu)接(jie)(jie)口(kou)(kou)到(dao)(dao)信號(hao)輸(shu)(shu)(shu)出(chu)(chu)(chu)IC的(de)(de)(de)線(xian)路(lu)是(shi)(shi)否(fou)(fou)(fou)連(lian)(lian)(lian)接(jie)(jie)或(huo)短路(lu)。2、檢(jian)(jian)(jian)測(ce)(ce)輸(shu)(shu)(shu)出(chu)(chu)(chu)口(kou)(kou)的(de)(de)(de)時鐘(zhong)鎖存信號(hao)是(shi)(shi)否(fou)(fou)(fou)正(zheng)(zheng)(zheng)常(chang)(chang)。3、檢(jian)(jian)(jian)測(ce)(ce)**后一個驅動IC之間的(de)(de)(de)級連(lian)(lian)(lian)輸(shu)(shu)(shu)出(chu)(chu)(chu)數(shu)據口(kou)(kou)是(shi)(shi)否(fou)(fou)(fou)與(yu)(yu)輸(shu)(shu)(shu)出(chu)(chu)(chu)接(jie)(jie)口(kou)(kou)的(de)(de)(de)數(shu)據口(kou)(kou)連(lian)(lian)(lian)接(jie)(jie)或(huo)是(shi)(shi)否(fou)(fou)(fou)短路(lu)。4、輸(shu)(shu)(shu)出(chu)(chu)(chu)的(de)(de)(de)信號(hao)是(shi)(shi)否(fou)(fou)(fou)有(you)(you)(you)相互(hu)短路(lu)的(de)(de)(de)或(huo)有(you)(you)(you)短路(lu)到(dao)(dao)地的(de)(de)(de)。5、檢(jian)(jian)(jian)查輸(shu)(shu)(shu)出(chu)(chu)(chu)的(de)(de)(de)排線(xian)是(shi)(shi)否(fou)(fou)(fou)良好。整(zheng)屏(ping)(ping)故障(zhang)：A.整(zheng)屏(ping)(ping)不(bu)(bu)亮(liang)（黑屏(ping)(ping)）1、檢(jian)(jian)(jian)測(ce)(ce)供電(dian)電(dian)源是(shi)(shi)否(fou)(fou)(fou)通(tong)(tong)(tong)(tong)(tong)電(dian)。2、檢(jian)(jian)(jian)測(ce)(ce)通(tong)(tong)(tong)(tong)(tong)訊線(xian)是(shi)(shi)否(fou)(fou)(fou)接(jie)(jie)通(tong)(tong)(tong)(tong)(tong)，有(you)(you)(you)無(wu)接(jie)(jie)錯。（同(tong)步屏(ping)(ping)）3、同(tong)步屏(ping)(ping)檢(jian)(jian)(jian)測(ce)(ce)發送卡和(he)接(jie)(jie)收卡通(tong)(tong)(tong)(tong)(tong)訊綠燈有(you)(you)(you)無(wu)閃爍。4、電(dian)腦顯示器(qi)是(shi)(shi)否(fou)(fou)(fou)保(bao)護，或(huo)者顯示屏(ping)(ping)顯示領域是(shi)(shi)黑色或(huo)純(chun)藍。（同(tong)步屏(ping)(ping)）B.整(zheng)塊(kuai)(kuai)(kuai)單(dan)元板(ban)(ban)不(bu)(bu)亮(liang)（黑屏(ping)(ping)）1、連(lian)(lian)(lian)續幾(ji)塊(kuai)(kuai)(kuai)板(ban)(ban)橫方(fang)向不(bu)(bu)亮(liang)，檢(jian)(jian)(jian)查正(zheng)(zheng)(zheng)常(chang)(chang)單(dan)元板(ban)(ban)與(yu)(yu)異常(chang)(chang)單(dan)元板(ban)(ban)之間的(de)(de)(de)排線(xian)連(lian)(lian)(lian)接(jie)(jie)是(shi)(shi)否(fou)(fou)(fou)接(jie)(jie)通(tong)(tong)(tong)(tong)(tong)；或(huo)者芯片(pian)245是(shi)(shi)否(fou)(fou)(fou)正(zheng)(zheng)(zheng)常(chang)(chang)，2、連(lian)(lian)(lian)續幾(ji)塊(kuai)(kuai)(kuai)板(ban)(ban)縱方(fang)向不(bu)(bu)亮(liang)，檢(jian)(jian)(jian)查此列電(dian)源供電(dian)是(shi)(shi)否(fou)(fou)(fou)正(zheng)(zheng)(zheng)常(chang)(chang)。C.單(dan)元板(ban)(ban)上行(xing)不(bu)(bu)亮(liang)1、查行(xing)腳(jiao)與(yu)(yu)4953輸(shu)(shu)(shu)出(chu)(chu)(chu)腳(jiao)是(shi)(shi)否(fou)(fou)(fou)有(you)(you)(you)通(tong)(tong)(tong)(tong)(tong)。2、查138是(shi)(shi)否(fou)(fou)(fou)正(zheng)(zheng)(zheng)常(chang)(chang)。3、查4953是(shi)(shi)否(fou)(fou)(fou)發燙或(huo)者燒毀。4、查4953是(shi)(shi)否(fou)(fou)(fou)有(you)(you)(you)高(gao)電(dian)平(ping)。5、查138與(yu)(yu)腳(jiao)是(shi)(shi)否(fou)(fou)(fou)有(you)(you)(you)通(tong)(tong)(tong)(tong)(tong)。D.單(dan)元板(ban)(ban)不(bu)(bu)亮(liang)1、查595是(shi)(shi)否(fou)(fou)(fou)正(zheng)(zheng)(zheng)常(chang)(chang)。2、查上下(xia)模(mo)塊(kuai)(kuai)(kuai)對應通(tong)(tong)(tong)(tong)(tong)腳(jiao)是(shi)(shi)否(fou)(fou)(fou)接(jie)(jie)通(tong)(tong)(tong)(tong)(tong)。3、查595輸(shu)(shu)(shu)出(chu)(chu)(chu)腳(jiao)到(dao)(dao)模(mo)塊(kuai)(kuai)(kuai)腳(jiao)是(shi)(shi)否(fou)(fou)(fou)有(you)(you)(you)通(tong)(tong)(tong)(tong)(tong)。E.單(dan)元板(ban)(ban)缺色1、查245。

     在(zai)節能(neng)(neng)(neng)環(huan)保(bao)性(xing)能(neng)(neng)(neng)上(shang)(shang)，上(shang)(shang)海碩百光(guang)電(dian) LED 顯(xian)(xian)示屏(ping)(ping)通(tong)過(guo)技術創新實現(xian)了(le)(le)能(neng)(neng)(neng)效(xiao)與性(xing)能(neng)(neng)(neng)的(de)平衡。相比(bi)傳統 LCD 或熒光(guang)顯(xian)(xian)示設(she)備，其 LED 顯(xian)(xian)示屏(ping)(ping)能(neng)(neng)(neng)耗降低(di) 50% 以上(shang)(shang)，以 P3.9*7.8 櫥窗透明屏(ping)(ping)為例，平均功耗* 240W/㎡，在(zai)同等顯(xian)(xian)示面積下能(neng)(neng)(neng)***減少電(dian)力消(xiao)耗。產品采用(yong)無鉛(qian)工藝和環(huan)保(bao)材料，符(fu)合 RoHS 等環(huan)保(bao)標準，降低(di)了(le)(le)生產和使(shi)用(yong)過(guo)程中(zhong)的(de)環(huan)境影響。在(zai)散(san)熱(re)設(she)計上(shang)(shang)，通(tong)過(guo)優化箱體結構和采用(yong)高效(xiao)散(san)熱(re)材料，實現(xian)了(le)(le)自(zi)然(ran)散(san)熱(re)與強制散(san)熱(re)的(de)結合，減少了(le)(le)風扇等散(san)熱(re)部件的(de)能(neng)(neng)(neng)耗和噪音(yin)。長期(qi)使(shi)用(yong)下來(lai)，不(bu)僅能(neng)(neng)(neng)為客(ke)戶節省可觀的(de)電(dian)費支(zhi)出，還能(neng)(neng)(neng)降低(di)碳(tan)排(pai)放，符(fu)合綠色(se)低(di)碳(tan)的(de)發展(zhan)趨勢(shi)，特別適合對環(huan)保(bao)要求較高的(de)公(gong)共建筑和商業場所。上(shang)(shang)海碩百光(guang)電(dian)交通(tong) LED 屏(ping)(ping)，實時更信息(xi)，機場車(che)站旅客(ke)無憂。

    顯(xian)(xian)(xian)示(shi)(shi)(shi)單元板(ban)(ban)一行(xing)不(bu)亮原(yuan)(yuan)(yuan)(yuan)因(yin)(yin)(yin)(yin)：TIP127、4953、LS138、LS145壞或(huo)(huo)引腳到功(gong)率管的(de)(de)(de)連(lian)線(xian)斷(duan)開(kai)。顯(xian)(xian)(xian)示(shi)(shi)(shi)單元板(ban)(ban)一列不(bu)亮原(yuan)(yuan)(yuan)(yuan)因(yin)(yin)(yin)(yin)：HC595、62726某(mou)個引腳虛(xu)焊(han)(han)。模塊的(de)(de)(de)一行(xing)或(huo)(huo)一列不(bu)亮原(yuan)(yuan)(yuan)(yuan)因(yin)(yin)(yin)(yin)：LED模塊引腳虛(xu)焊(han)(han)。2．同步視屏(ping)系統開(kai)計算機，顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)無(wu)(wu)任何反應(ying)原(yuan)(yuan)(yuan)(yuan)因(yin)(yin)(yin)(yin)：通(tong)(tong)訊(xun)(xun)(xun)線(xian)路有(you)故(gu)(gu)障(zhang)(zhang)（如連(lian)接(jie)(jie)不(bu)好）。開(kai)計算機，顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)有(you)閃動，但(dan)無(wu)(wu)信(xin)號原(yuan)(yuan)(yuan)(yuan)因(yin)(yin)(yin)(yin)：驅動軟件LEDSETUP沒有(you)啟(qi)動。顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)正常(chang)(chang)(chang)顯(xian)(xian)(xian)示(shi)(shi)(shi)，但(dan)全屏(ping)有(you)閃動原(yuan)(yuan)(yuan)(yuan)因(yin)(yin)(yin)(yin)：通(tong)(tong)訊(xun)(xun)(xun)線(xian)路、發(fa)送卡(ka)(ka)接(jie)(jie)收(shou)卡(ka)(ka)或(huo)(huo)接(jie)(jie)收(shou)卡(ka)(ka)有(you)故(gu)(gu)障(zhang)(zhang)。顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)顏色不(bu)正常(chang)(chang)(chang)原(yuan)(yuan)(yuan)(yuan)因(yin)(yin)(yin)(yin)：顯(xian)(xian)(xian)示(shi)(shi)(shi)模式設(she)置(zhi)有(you)問題。顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)部分顯(xian)(xian)(xian)示(shi)(shi)(shi)不(bu)正常(chang)(chang)(chang)原(yuan)(yuan)(yuan)(yuan)因(yin)(yin)(yin)(yin)：檢查相應(ying)的(de)(de)(de)掃(sao)描(miao)板(ban)(ban)，可能無(wu)(wu)電源，或(huo)(huo)HC541、74F245、1016有(you)故(gu)(gu)障(zhang)(zhang)，也可能是接(jie)(jie)觸不(bu)良。3．異步文字(zi)屏(ping)系統開(kai)機無(wu)(wu)顯(xian)(xian)(xian)示(shi)(shi)(shi)原(yuan)(yuan)(yuan)(yuan)因(yin)(yin)(yin)(yin)：主控板(ban)(ban)可能無(wu)(wu)電源，或(huo)(huo)電壓太低。開(kai)機有(you)舊內(nei)(nei)(nei)容顯(xian)(xian)(xian)示(shi)(shi)(shi)但(dan)通(tong)(tong)訊(xun)(xun)(xun)不(bu)過原(yuan)(yuan)(yuan)(yuan)因(yin)(yin)(yin)(yin)：通(tong)(tong)訊(xun)(xun)(xun)線(xian)路不(bu)正常(chang)(chang)(chang)，接(jie)(jie)線(xian)不(bu)對通(tong)(tong)訊(xun)(xun)(xun)接(jie)(jie)口芯片(pian)232壞或(huo)(huo)計算機通(tong)(tong)訊(xun)(xun)(xun)接(jie)(jie)口壞。內(nei)(nei)(nei)容丟失原(yuan)(yuan)(yuan)(yuan)因(yin)(yin)(yin)(yin)：。以(yi)上為(wei)經常(chang)(chang)(chang)出現(xian)的(de)(de)(de)故(gu)(gu)障(zhang)(zhang)，客戶(hu)一般都(dou)能自行(xing)解決。如出現(xian)更(geng)為(wei)復(fu)雜的(de)(de)(de)情況(kuang)，請與我(wo)(wo)們聯系，我(wo)(wo)們隨(sui)時(shi)(shi)響應(ying)并為(wei)您提供**質量的(de)(de)(de)服(fu)務。LED顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)維修資料74HC245的(de)(de)(de)作用：信(xin)號功(gong)率放大。第1腳DIR，為(wei)輸(shu)(shu)入輸(shu)(shu)出端(duan)口轉換用，DIR=“1”高電平時(shi)(shi)信(xin)號由“A”端(duan)輸(shu)(shu)入“B”端(duan)輸(shu)(shu)出，DIR=“0”低電平時(shi)(shi)信(xin)號由“B”端(duan)輸(shu)(shu)入“A”端(duan)輸(shu)(shu)出。上海(hai)碩(shuo)百光電節能 LED 屏(ping)，功(gong)耗低無(wu)(wu)汞(gong)，綠色辦公之(zhi)選(xuan).上海(hai)室內(nei)(nei)(nei)LED顯(xian)(xian)(xian)示(shi)(shi)(shi)屏(ping)批發(fa)價格

上(shang)海碩百光(guang)電 LED 屏防(fang)篡改，數據加密，公司信息**播(bo)。上(shang)海透明(ming)LED顯示屏批發

    即有(you)(you)36路(lu)需要**受控.一個普通的(de)(de)51單片機只有(you)(you)32個IO輸出(chu)(chu)口(kou)(kou)可以(yi)使用(yong),直接并口(kou)(kou)輸出(chu)(chu)接LED,輸出(chu)(chu)口(kou)(kou)是(shi)不夠的(de)(de).如(ru)果有(you)(you)兩條12段呢,就有(you)(you)72路(lu)需要**受控,如(ru)果有(you)(you)10條呢...大量的(de)(de)輸出(chu)(chu)口(kou)(kou)需求,要擴(kuo)展(zhan)(zhan)單片機并行(xing)IO口(kou)(kou),擴(kuo)展(zhan)(zhan)單片機IO的(de)(de)方(fang)式一般有(you)(you)3-8驛碼器(qi)(qi)(qi)(qi),串行(xing)移(yi)位(wei)寄(ji)(ji)存(cun)(cun)器(qi)(qi)(qi)(qi),8255通用(yong)可編(bian)程IO擴(kuo)展(zhan)(zhan).在(zai)(zai)三種方(fang)式中(zhong)只有(you)(you)串行(xing)移(yi)位(wei)寄(ji)(ji)存(cun)(cun)器(qi)(qi)(qi)(qi)適用(yong)大量的(de)(de)IO口(kou)(kou)擴(kuo)展(zhan)(zhan),從理(li)論(lun)上(shang)講(jiang)串行(xing)移(yi)位(wei)寄(ji)(ji)存(cun)(cun)器(qi)(qi)(qi)(qi)可以(yi)擴(kuo)展(zhan)(zhan)無數IO口(kou)(kou),但(dan)在(zai)(zai)實(shi)(shi)際(ji)應用(yong)中(zhong),受單片機的(de)(de)速度與信(xin)號(hao)(hao)傳輸的(de)(de)影響,是(shi)有(you)(you)一定的(de)(de)局限(xian)性的(de)(de),我們做過實(shi)(shi)際(ji)的(de)(de)**多普曾擴(kuo)展(zhan)(zhan)過10000個IO口(kou)(kou).移(yi)位(wei)寄(ji)(ji)存(cun)(cun)器(qi)(qi)(qi)(qi)常(chang)用(yong)芯片有(you)(you)CD4094,74HC595,DM135,TB62726,MBI5026,ST2221CD4094是(shi)COMS電位(wei)的(de)(de)移(yi)位(wei)寄(ji)(ji)存(cun)(cun)器(qi)(qi)(qi)(qi),工作電壓范圍寬,從3-18都可以(yi)工作,可以(yi)不**供(gong)電,其信(xin)號(hao)(hao)輸出(chu)(chu)允許對地短路(lu),在(zai)(zai)實(shi)(shi)際(ji)應用(yong)中(zhong)損壞較少,但(dan)其速度較慢,5V時在(zai)(zai)2M。上(shang)海透明LED顯示屏(ping)批發(fa)