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1、校驗(yàn) PCB設(shè)計(jì) 內(nèi)容回顧上章主要介紹了元件定位的三種方法:手工定位元件 自動(dòng)定位元件 智能自動(dòng)定位元件學(xué)習(xí)目標(biāo) 學(xué)會(huì)用DRC對(duì)PCB板進(jìn)行設(shè)計(jì)規(guī)則檢查(Design Rule Check)主要是學(xué)會(huì)如何設(shè)置和運(yùn)行DRC設(shè)置和運(yùn)行DRC 打開PCB文件 執(zhí)行Tools/Design Rule Check命令,彈出對(duì)話框 Design Rule Check對(duì)話框 Report選項(xiàng)卡用于設(shè)置以報(bào)表形式生成規(guī)則檢查結(jié)果的各個(gè)選項(xiàng) On-line選項(xiàng)卡用于設(shè)置以在線方式檢查規(guī)則的各個(gè)選項(xiàng) Design Rule Check對(duì)話框 Report選項(xiàng)卡有如下幾個(gè)區(qū)域:Routing Rules區(qū)域(布線規(guī)
2、則)Manufacturing Rules區(qū)域(制造規(guī)則)High Speed Rules區(qū)域(高速規(guī)則)Options區(qū)域(選項(xiàng))Design Rule Check對(duì)話框Report選項(xiàng)卡 ON-LINE選項(xiàng)卡 Routing Rules區(qū)域Manufacturing Rules區(qū)域High Speed Rules區(qū)域Options區(qū)域Design Rule Check對(duì)話框 Routing Rules區(qū)域,檢查一般性的設(shè)計(jì)規(guī)則:Clearance Constraints(安全間距檢查)Max/Min Width Constraints(導(dǎo)線寬度檢查)Short Circuit Constr
3、aints(短路檢查)Un-Routed Net Constraints(沒有完成布線的網(wǎng)絡(luò)進(jìn)行檢查)SMD To Corner Constraints(走線拐彎處與SMD的距離檢查)SMD NeckDown Constraints(SMD的瓶頸限制檢查)SMD To Plane Constraints(SMD到地電層的距離的限制檢查)Design Rule Check對(duì)話框 Manufacturing Rules區(qū)域,檢查與制作電路板有關(guān)的設(shè)置 Minimun Annular Ring(圓環(huán)寬度檢查)Acute Angle(尖角檢查)Max/Min Hole Size(打孔尺寸檢查)Unco
4、nnected Pins(懸空針腳檢查)Layer Pairs(層對(duì)規(guī)則檢查)Testpoint Style(測(cè)試點(diǎn)風(fēng)格檢查)Testpoint Usage(測(cè)試點(diǎn)用法檢查)Design Rule Check對(duì)話框 High Speed Rules區(qū)域,對(duì)高頻規(guī)則進(jìn)行檢查 Parallel Segment Constraints(平行布線檢查)Max/Min Length Constraints(網(wǎng)絡(luò)長(zhǎng)度檢查)Matched Length Constraints(等線調(diào)整檢查)Daisy Chain Stub Constraints(分支線路的長(zhǎng)度檢查)Maximum Via Count(導(dǎo)孔
5、數(shù)檢查)Vias Under SMD Pads(SMD 焊點(diǎn)中放置導(dǎo)孔檢查)Design Rule Check對(duì)話框 OPTIONS區(qū)域 Create Report File項(xiàng),在規(guī)則檢查完畢后生成檢查報(bào)告 Create Violations項(xiàng),在電路板里檢查出違反規(guī)則的地方,用高亮度綠色表示出來 Sub-Net Details項(xiàng),對(duì)設(shè)置的子網(wǎng)絡(luò)一起檢查 設(shè)置信號(hào)檢查 單擊按鈕 ,在彈出的信號(hào)檢查對(duì)話框中對(duì)要檢查的信號(hào)進(jìn)行設(shè)置 On-line選項(xiàng)卡 對(duì)設(shè)計(jì)規(guī)則的在線檢查進(jìn)行相應(yīng)設(shè)置 與Report選項(xiàng)卡的設(shè)置基本相同 在手工布線過程中,可以讓DRC在后臺(tái)運(yùn)行,實(shí)時(shí)的進(jìn)行設(shè)計(jì)規(guī)則檢查 運(yùn)行檢查 單擊對(duì)話框的Run DRC按鈕,系統(tǒng)即自動(dòng)執(zhí)行設(shè)計(jì)規(guī)則檢查 如果在圖15-1中選擇了Create Report選項(xiàng),系統(tǒng)在進(jìn)行檢查后,將自動(dòng)產(chǎn)生一個(gè)檢查結(jié)果報(bào)告 至此,設(shè)置運(yùn)行DRC全部完成 小 結(jié) 本章詳細(xì)介紹了對(duì)PCB板進(jìn)行DRC(Design Rule Check)的設(shè)置和運(yùn)行方法,希望讀者熟練掌握 謝謝大家!