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EDID-Board

  • PCB設(shè)計(jì)問(wèn)題集錦

    PCB設(shè)計(jì)問(wèn)題集錦 問(wèn):PCB圖中各種字符往往容易疊加在一起,或者相距很近,當(dāng)板子布得很密時(shí),情況更加嚴(yán)重。當(dāng)我用Verify Design進(jìn)行檢查時(shí),會(huì)產(chǎn)生錯(cuò)誤,但這種錯(cuò)誤可以忽略。往往這種錯(cuò)誤很多,有幾百個(gè),將其他更重要的錯(cuò)誤淹沒(méi)了,如何使Verify Design會(huì)略掉這種錯(cuò)誤,或者在眾多的錯(cuò)誤中快速找到重要的錯(cuò)誤。    答:可以在顏色顯示中將文字去掉,不顯示后再檢查;并記錄錯(cuò)誤數(shù)目。但一定要檢查是否真正屬于不需要的文字。 問(wèn): What’s mean of below warning:(6230,8330 L1) Latium Rule not checked: COMPONENT U26 component rule.答:這是有關(guān)制造方面的一個(gè)檢查,您沒(méi)有相關(guān)設(shè)定,所以可以不檢查。 問(wèn): 怎樣導(dǎo)出jop文件?答:應(yīng)該是JOB文件吧?低版本的powerPCB與PADS使用JOB文件。現(xiàn)在只能輸出ASC文件,方法如下STEP:FILE/EXPORT/選擇一個(gè)asc名稱/選擇Select ALL/在Format下選擇合適的版本/在Unit下選Current比較好/點(diǎn)擊OK/完成然后在低版本的powerPCB與PADS產(chǎn)品中Import保存的ASC文件,再保存為JOB文件。 問(wèn): 怎樣導(dǎo)入reu文件?答:在ECO與Design 工具盒中都可以進(jìn)行,分別打開(kāi)ECO與Design 工具盒,點(diǎn)擊右邊第2個(gè)圖標(biāo)就可以。 問(wèn): 為什么我在pad stacks中再設(shè)一個(gè)via:1(如附件)和默認(rèn)的standardvi(如附件)在布線時(shí)V選擇1,怎么布線時(shí)按add via不能添加進(jìn)去這是怎么回事,因?yàn)橛袝r(shí)要使用兩種不同的過(guò)孔。答:PowerPCB中有多個(gè)VIA時(shí)需要在Design Rule下根據(jù)信號(hào)分別設(shè)置VIA的使用條件,如電源類只能用Standard VIA等等,這樣操作時(shí)就比較方便。詳細(xì)設(shè)置方法在PowerPCB軟件通中有介紹。 問(wèn):為什么我把On-line DRC設(shè)置為prevent..移動(dòng)元時(shí)就會(huì)彈出(圖2),而你們教程中也是這樣設(shè)置怎么不會(huì)呢?答:首先這不是錯(cuò)誤,出現(xiàn)的原因是在數(shù)據(jù)中沒(méi)有BOARD OUTLINE.您可以設(shè)置一個(gè),但是不使用它作為CAM輸出數(shù)據(jù). 問(wèn):我用ctrl+c復(fù)制線時(shí)怎設(shè)置原點(diǎn)進(jìn)行復(fù)制,ctrl+v粘帖時(shí)總是以最下面一點(diǎn)和最左邊那一點(diǎn)為原點(diǎn) 答: 復(fù)制布線時(shí)與上面的MOVE MODE設(shè)置沒(méi)有任何關(guān)系,需要在右鍵菜單中選擇,這在PowerPCB軟件通教程中有專門(mén)介紹. 問(wèn):用(圖4)進(jìn)行修改線時(shí)拉起時(shí)怎總是往左邊拉起(圖5),不知有什么辦法可以輕易想拉起左就左,右就右。答: 具體條件不明,請(qǐng)檢查一下您的DESIGN GRID,是否太大了. 問(wèn): 好不容易拉起右邊但是用(圖6)修改線怎么改怎么下面都會(huì)有一條不能和在一起,而你教程里都會(huì)好好的(圖8)答:這可能還是與您的GRID 設(shè)置有關(guān),不過(guò)沒(méi)有問(wèn)題,您可以將不需要的那段線刪除.最重要的是需要找到布線的感覺(jué),每個(gè)軟件都不相同,所以需要多練習(xí)。 問(wèn): 尊敬的老師:您好!這個(gè)圖已經(jīng)畫(huà)好了,但我只對(duì)(如圖1)一種的完全間距進(jìn)行檢查,怎么錯(cuò)誤就那么多,不知怎么改進(jìn)。請(qǐng)老師指點(diǎn)。這個(gè)圖在附件中請(qǐng)老師幫看一下,如果還有什么問(wèn)題請(qǐng)指出來(lái),本人在改進(jìn)。謝!!!!!答:請(qǐng)注意您的DRC SETUP窗口下的設(shè)置是錯(cuò)誤的,現(xiàn)在選中的SAME NET是對(duì)相同NET進(jìn)行檢查,應(yīng)該選擇NET TO ALL.而不是SAME NET有關(guān)各項(xiàng)參數(shù)的含義請(qǐng)仔細(xì)閱讀第5部教程. 問(wèn): U101元件已建好,但元件框的拐角處不知是否正確,請(qǐng)幫忙CHECK 答:元件框等可以通過(guò)修改編輯來(lái)完成。問(wèn): U102和U103元件沒(méi)建完全,在自動(dòng)建元件參數(shù)中有幾個(gè)不明白:如:SOIC--》silk screen欄下spacing from pin與outdent from first pin對(duì)應(yīng)U102和U103元件應(yīng)寫(xiě)什么數(shù)值,還有這兩個(gè)元件SILK怎么自動(dòng)設(shè)置,以及SILK內(nèi)有個(gè)圓圈怎么才能畫(huà)得與該元件參數(shù)一致。 答:Spacing from pin指從PIN到SILK的Y方向的距離,outdent from first pin是第一PIN與SILK端點(diǎn)間的距離.請(qǐng)根據(jù)元件資料自己計(jì)算。

    標(biāo)簽: PCB 設(shè)計(jì)問(wèn)題 集錦

    上傳時(shí)間: 2014-01-03

    上傳用戶:Divine

  • HDMI一致性測(cè)試

      The high defi nition multimedia interface (HDMI) is fastbecoming the de facto standard for passing digitalaudio and video data in home entertainment systems.This standard includes an I2C type bus called a displaydata channel (DDC) that is used to pass extended digitalinterface data (EDID) from the sinkdevice (such as adigital TV) to the source device (such as a digital A/Vreceiver). EDID includes vital information on the digitaldata formats that the sink device can accept. The HDMIspecifi cation requires that devices have less than 50pFof input capacitance on their DDC bus lines, which canbe very diffi cult to meet. The LTC®4300A’s capacitancebuffering feature allows devices to pass the HDMI DDCinput capacitance compliance test with ease.

    標(biāo)簽: HDMI 測(cè)試

    上傳時(shí)間: 2013-11-21

    上傳用戶:tian126vip

  • LT5514三階互調(diào)的精確測(cè)量

      Accurate measurement of the third order intercept pointfor low distortion IC products such as the LT5514 requirescertain precautions to be observed in the test setup andtesting procedure. The LT5514 linearity performance ishigh enough to push the test equipment and test set-up totheir limits. A method for accurate measurement of thirdorder intermodulation products, IM3, with standard testequipment is outlined below.It is also important to correctly interpret the LT5514specification with respect to ROUT, and the impact ofdemo-board transmission-line termination loss whenevaluating the linearity performance, as explained in theLT5514 Datasheet and in Note 1 of this document.

    標(biāo)簽: 5514 LT 三階互調(diào) 精確測(cè)量

    上傳時(shí)間: 2013-11-14

    上傳用戶:l254587896

  • XAPP904 - CoolRunner-II特性LCD模塊接口

      There are many manufacturers of dot matrix LCD modules. However, most of these displaysare similar. They all have on-board controllers and drivers capable of displaying alpha numericsand a wide variety of other symbols (including Japanese "Katakana" characters). The internaloperation of LCD controller devices is determined by signals sent from a central processing unit(in this case, a CoolRunner-II CPLD).

    標(biāo)簽: CoolRunner-II XAPP 904 LCD

    上傳時(shí)間: 2013-12-17

    上傳用戶:haiya2000

  • DVI接口應(yīng)用系統(tǒng)的設(shè)計(jì)

    介紹了數(shù)字視頻接口DVI1.0 的體系架構(gòu)及其基本原理; 從應(yīng)用角度出發(fā)詳細(xì)介紹了經(jīng)實(shí)驗(yàn)成功的DVI 接口電路系統(tǒng)構(gòu)成, 以及該系統(tǒng)的核心- DVI 接口器件TFP401A。重點(diǎn)分析了TFP401A的特性、工作原理和高頻混合信號(hào)電路在PCB 布線中的注意事項(xiàng), 最后介紹了開(kāi)發(fā)DVI 應(yīng)用接口相關(guān)的EDID(擴(kuò)展顯示標(biāo)識(shí)數(shù)據(jù))和HPD(熱插拔)檢測(cè)等VESA 技術(shù)標(biāo)準(zhǔn)。關(guān)鍵詞: DVI; TMDS; 混合信號(hào)布線; 電路設(shè)計(jì); VESA 標(biāo)準(zhǔn); TFP401A

    標(biāo)簽: DVI 接口應(yīng)用

    上傳時(shí)間: 2013-10-15

    上傳用戶:maricle

  • superpro 3000u 驅(qū)動(dòng)及編程器軟件下載

    superpro 3000u 驅(qū)動(dòng) PIC16C65B@QFP44 [SA245] PIC16C65B:          Part number QFP44:              Package in QFP44 SA245:              Adapter purchase number AM29DL320GT@FBGA48 [SA642+B026] AM29DL320GT:        Part number FBGA48:             Package in FBGA48 SA642:              Adapter purchase number (Top board with socket) B026:               Adapter purchase number (Bottom board, exchangable for different parts) 87C196CA@PLCC68(universal adapter) [PEP+S414T] 87C196CA:           Part number PLCC68:             Package in PLCC68 universal adapter:  this adapter is valid for all parts in this package PEP:                The PEP (Pin-driver Expansion Pack necessary to work with the adapter S414T) S414T:              Adapter purchase number (Universal for all parts in this package) S71PL127J80B@FBGA64(special adapter) [(SA642A-B079A-Y096AF001)] S71PL127J80B:            Part number FBGA64:                  Package in FBGA64 special adapter:         this adapter is valid for this

    標(biāo)簽: superpro 3000u 驅(qū)動(dòng) 編程器軟件

    上傳時(shí)間: 2014-03-27

    上傳用戶:ippler8

  • ERWIN絕好的數(shù)據(jù)庫(kù)建模工具,可以把數(shù)據(jù)模型導(dǎo)入數(shù)據(jù)庫(kù)如sql server foxpro等這里是方法指南更多內(nèi)容可以去http://erwin.softwarechn.com/_script/sh

    ERWIN絕好的數(shù)據(jù)庫(kù)建模工具,可以把數(shù)據(jù)模型導(dǎo)入數(shù)據(jù)庫(kù)如sql server foxpro等這里是方法指南更多內(nèi)容可以去http://erwin.softwarechn.com/_script/showfull.asp?Board=method&Tabname=erwin

    標(biāo)簽: softwarechn server foxpro script

    上傳時(shí)間: 2013-12-06

    上傳用戶:c12228

  • 1.此代碼在SDT2.51下調(diào)試通過(guò)

    1.此代碼在SDT2.51下調(diào)試通過(guò),可以在我的板子ARM DEVELOP BOARD V1.0上面跑!其上電以后LED會(huì)閃爍一下,接著串口0會(huì)輸出一些系統(tǒng)信息 可以通過(guò)串口終端與系統(tǒng)交互,可以測(cè)試320X240 STN LCD,包括圖形顯示函數(shù),ascii字符顯示函數(shù)。

    標(biāo)簽: 2.51 SDT 代碼 調(diào)試

    上傳時(shí)間: 2015-02-18

    上傳用戶:離殤

  • USB通信具有快速

    USB通信具有快速,熱插拔的特性,可以廣泛的應(yīng)用到與計(jì)算機(jī)通信的地方。本示例是計(jì)算機(jī)通過(guò)USB總線,控制單片機(jī)對(duì)I2C E2PROM進(jìn)行讀寫(xiě)操作。下位機(jī)電路主要采用廣州周立功單片機(jī)發(fā)展有限公司推出的USB Smart Board,外掛一個(gè)24系列的E2PROM。

    標(biāo)簽: USB 通信

    上傳時(shí)間: 2013-12-02

    上傳用戶:nanfeicui

  • LPC2148 USB Audio Device Example This USB example project implements an USB Audio Device that conne

    LPC2148 USB Audio Device Example This USB example project implements an USB Audio Device that connects via the USB interface to the PC. It may be used on the following devices: LPC2141 LPC2142 LPC2144 LPC2146 LPC2148 An USB Audio Device (HID) does not require any special USB driver, since the USB Audio support is already built into Windows 2000 and Windows XP. Therefore USB Audio devices can be directly connected to the computer. This example project is designed to work with Keil MCB2140 Evaluation Board. Refer to Running USBAudio for information on how to operate this example project.

    標(biāo)簽: Device USB Audio implements

    上傳時(shí)間: 2015-04-16

    上傳用戶:VRMMO

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