This document provides guidelines for integrating a discrete high speed USB host controller onto a fourlayer desktop motherboard. The material covered can be broken into three main categories: Board design guidelines, EMI/ESD guidelines and front panel USB guidelines. Section 1.1 Background provides an explanation of the routing experiments and testing performed to validate the feasibility of 480 Megabits per second on an actual motherboard. Section 7 contains a design checklist that lists each design recommendation described in this document. High speed USB operation is described in the USB 2.0 Specification (http://www.usb.org/developers/docs.html).
標簽: integrating controller guidelines document
上傳時間: 2013-11-27
上傳用戶:電子世界
This document provides guidelines for integrating a discrete high speed USB host controller onto a fourlayer desktop motherboard. The material covered can be broken into three main categories: Board design guidelines, EMI/ESD guidelines and front panel USB guidelines. Section 1.1 Background provides an explanation of the routing experiments and testing performed to validate the feasibility of 480 Megabits per second on an actual motherboard. Section 7 contains a design checklist that lists each design recommendation described in this document. High speed USB operation is described in the USB 2.0 Specification (http://www.usb.org/developers/docs.html).
標簽: integrating controller guidelines document
上傳時間: 2015-11-18
上傳用戶:xhz1993
gphone is a net phone base on the rtp protocol. It is simple but pratical and can be a good sample for newbies of rtp protocol
標簽: protocol pratical gphone simple
上傳時間: 2014-01-19
上傳用戶:lnnn30
Spartan 3 Digilent Demo:This demo drives the perphrials on the Spartan 3 board. This drives a simple pattern to the VGA port, connects the switches to the LEDs, buttons to each anode of the seven segment decoder. The seven segment decoder has a simple counter running on it, and when SW0 is in the up position the seven segment decoder will display scan codes from the PS2 port. This demo how ever does not drive the RS-232 port or the memory. This is a simple design done entirely VHDL not microblaze.
標簽: Spartan drives This perphrials
上傳時間: 2014-05-29
上傳用戶:SimonQQ
螞蟻算法,c語言版,其中,‘F’點表示食物,‘H’表示窩,白色塊表示障礙物,‘+’就是螞蟻了。
標簽: 螞蟻算法
上傳時間: 2013-12-24
上傳用戶:2404
嘿嘿,大俠看到不要見笑呀... 大家都知道使用DLL的好處.于是我就想把FORM封裝到DLL里面去. 到網(wǎng)上找,發(fā)現(xiàn)是MDI和模式窗體的,非模式的也有很多問題.便想自己解決這個問題. 原來是用DLL創(chuàng)建一個對象返回,但發(fā)現(xiàn)有很多的問題. 想了半天就去尋根問柳吧. 找到了類. 我就想把類封裝進DLL,到時簡單的返回一個類,然后在主程序里操作不就簡單了? 找了半天發(fā)現(xiàn)了TFormClass,于是試了試從DLL導出來,像一般的程序一樣創(chuàng)建窗體發(fā)現(xiàn)成功. 接著我又想看看其他的類是不是也能這樣,就拿TFrame來實驗. function GetDllFrameClass():TFrame stdcall 第一次是這樣聲明的,失敗.奇怪?! 試了好多次都不行,就想到了TFormClass(Ctrl+左鍵),進去看看,發(fā)現(xiàn)是這樣聲明的. TFormClass = class of TForm 哎呀,恍然大悟!! class(TFrame) 是聲明一個類, 這個類繼承了TFrame類 f: TFrame 是一個對象 class of TFrame 聲明的是類類型, f:TFrameClass 是一個類. function GetDllFrameClass():TFrame 返回就不是類而是對象了,照TFormClass修改后TFrameClass = class of TFrame 運行...成功,
上傳時間: 2013-12-10
上傳用戶:kiklkook
單片機系統(tǒng)上電后,P0 口和 P1 口都被清 0。然后,你規(guī)定一個由 6 個數(shù)字構(gòu)成的序列(每個數(shù)字從 0~F 中選取),比如 E、8、9、0、7、F。然后每次當單片機檢測到外部中斷 0發(fā)起中斷時間時,讀取 P0 口和 P1 口上的狀態(tài)值,當連續(xù) 6 次外部中斷事件的對應的數(shù)字序列構(gòu)成你所設(shè)定的序列后(舉例來說,如果 P0.0 是 1,P0 和 P1 的其他管腳是 0,那么我們稱為檢測到一次數(shù)字 0),從串口打印輸出一幅類似下圖的 16×16 的ASCII碼的圣誕樹圖片。
標簽: 單片機系統(tǒng) 上電
上傳時間: 2015-12-04
上傳用戶:wqxstar
氣候分析中檢驗突變的經(jīng)典程序,如滑動t檢驗,cv,滑動f檢驗等
上傳時間: 2014-01-08
上傳用戶:yulg
在做一個單片機系統(tǒng)時,常常會遇到這樣那樣的數(shù)據(jù)采集,在這些被采集的數(shù)據(jù)中, 大部分可以通過我們的I/O 口擴展接口電路直接得到,由于51 單片機大部分不帶AD 轉(zhuǎn)換 器,所以模擬量的采集就必須靠A/D或V/F 實現(xiàn)。下現(xiàn)我們就來了解一下AD0809與51 單 片機的接口及其程序設(shè)計。
標簽: 單片機系統(tǒng)
上傳時間: 2015-12-09
上傳用戶:古谷仁美
FuncPlotter is a combined Java application and applet for displaying two-dimensional plots of explicit functions in one variable (ie, FuncPlotter plots functions of the form y = f(x), where f(x) is composed from common mathematical operators).
標簽: two-dimensional FuncPlotter application displaying
上傳時間: 2015-12-16
上傳用戶:妄想演繹師
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