FSM 分兩大類：米里型和摩爾型。 組成要素有輸入(包括復位)，狀態(包括當前狀態的操作)，狀態轉移條件，狀態的輸出條件。 設計FSM 的方法和技巧多種多樣，但是總結起來有兩大類：第一種，將狀態轉移和狀態的操作和判斷等寫到一個模塊(process、block)中。另一種是將狀態轉移單獨寫成一個模塊，將狀態的操作和判斷等寫到另一個模塊中(在Verilog 代碼中，相當于使用兩個“ALWAYS” block)。其中較好的方式是后者。其原因 如下： 首先FSM 和其他設計一樣，最好使用同步時序方式設計，好處不再累述。而狀態機實現后，狀態轉移是用寄存器實現的，是同步時序部分。狀態的轉移條件的判斷是通過組合邏輯判斷實現的，之所以第二種比第一種編碼方式合理，就在于第二種編碼將同步時序和組合邏輯分別放到不同的程序塊(process，block) 中實現。這樣做的好處不僅僅是便于閱讀、理解、維護，更重要的是利于綜合器優化代碼，利于用戶添加合適的時序約束條件，利于布局布線器實現設計。顯式的 FSM 描述方法可以描述任意的FSM(參考Verilog 第四版)P181 有限狀態機的說明。兩個 ALWAYS 模塊。其中一個是時序模塊，一個為組合邏輯。時序模塊設計與書上完全一致，表示狀態轉移，可分為同步與異步復位。
標簽： 狀態
上傳時間： 2015-01-02
上傳用戶：aa17807091
Abstract: The reality of modern, small form-factor ceramic capacitors is a good reminder to ALWAYS readthe data sheet. This tutorial explains how ceramic capacitor type designations, such as X7R and Y5V,imply nothing about voltage coefficients. Engineers must check the data to know, really know, how aspecific capacitor will perform under voltage.
上傳時間： 2013-11-04
上傳用戶：梧桐
先進的窗口管理器。可以在你的桌面上實現凍結、解凍、更名、設置總在最上面、設置不總在最上面、閃爍、最大化、最小化、聚焦、隱藏、顯示和中斷一個可視或不可視窗口的功能。 An advanced window manager that allows you to freeze, dfreeze, rename, set ALWAYS on top, set not ALWAYS on top, flash, maximize, minimize, focus, hide, show or terminate an visible or invisible window on your desktop.
上傳時間： 2015-03-25
上傳用戶：qq21508895
The code assumes a two-dimensional computational domain with TMz polarization (i.e., non-zero field Ez, Hx, and Hy). The program is currently written so that the incident field ALWAYS strikes the lower-left corner of the total-field region first. (If you want a different corner, that should be a fairly simple tweak to the code, but for now you ll have to make that tweak yourself.) I have attempted to provide copious comments in the code and hope that a knowledgeable C programmer can quickly map the approach as described in the paper to what is in the program.
標簽： two-dimensional computational polarization non-zero
上傳時間： 2013-12-13
上傳用戶：cylnpy
The tar file contains the following files: ptfsf.c: heart of the perfect TFSF code ptfsf.h: header file for same ptfsf-demo.c: FDTD code which demonstrates use of perfect TFSF code. Essentially this program used to generate results shown in the paper ptfsf-file-maker.c: code to generate an incident-field file using the "perfect" incident fields ptfsf-demo-file.c: FDTD code which uses the perfect incident fields stored in a file fdtdgen.h: defines macros used in much of my code Makefile: simple make-file to compile programs Also include are some simple script files to run the programs with reasonable values. The code assumes a two-dimensional computational domain with TMz polarization (i.e., non-zero field Ez, Hx, and Hy). The program is currently written so that the incident field ALWAYS strikes the lower-left corner of the total-field region first. (If you want a different corner, that should be a fairly simple tweak to the code, but for now you ll have to make that tweak yourself.)
標簽： ptfsf following the contains
上傳時間： 2013-11-28
上傳用戶：風之驕子
Securing Apache 2: Step-by-Step When choosing a web server, Apache very often wins against its competitors because of stability, performance, that fact that it s open source, and many other advantages. But when deciding on which version of Apache to use, the choice is not ALWAYS so simple. On the one hand there is a very popular, stable version used by millions of users, version 1.3, and on the other hand, there is an enhanced and re-designed version 2.0.
標簽： Apache Step-by-Step Securing choosing
上傳時間： 2015-09-06
上傳用戶：gundamwzc
基于Verilog-HDL的硬件電路的實現 9.6 脈沖高電平和低電平持續時間的測量與顯示 9.6.1 脈沖高電平和低電平持續時間測量的工作原理 9.6.2 高低電平持續時間測量模塊的設計與實現 9.6.3 改進型高低電平持續時間測量模塊的設計與實現 9.6.4 begin聲明語句的使用方法 9.6.5 initial語句和ALWAYS語句的使用方法 9.6.6 時標信號發生模塊的設計與實現 9.6.7 脈沖高低電平持續時間測量的Verilog-HDL描述 9.6.8 脈沖高低電平持續時間測量的硬件實現
標簽： Verilog-HDL 低電平 9.6 時間測量
上傳時間： 2013-11-30
上傳用戶：chenlong
Welcome to the ASTA 3 Help Tutorials. These are documented tutorials that included new user jump start, to file sends to server techniques with non-database servers showing how to use Providers and ServerMethods. A Current version of these tutorials can ALWAYS be found on line
標簽： documented Tutorials tutorials included
上傳時間： 2013-12-18
上傳用戶：gyq
用php開發的crm系統， 推薦使用php4 + MYSQL 4搭建！！ 采用Sugar Suite v4.0.1為核心！ For a list of new features and other important information about Sugar Suite 4.0.1, please see the ReleaseNotes.doc file. Our goal continues to be to build the customer relationship management system that you have ALWAYS wanted, so your input is vital. To share ideas with the Sugar Community, ask questions, find answers and submit feedback, please visit our Sugar Forums at http://forums.sugarcrm.com.
上傳時間： 2013-12-31
上傳用戶：z1191176801
windows開源代碼 Microsoft Windows is a complex operating system. It offers so many features and does so much that it s impossible for any one person to fully understand the entire system. This complexity also makes it difficult for someone to decide where to start concentrating the learning effort. Well, I ALWAYS like to start at the lowest level by gaining a solid
標簽： Microsoft operating features windows
上傳時間： 2015-11-24
上傳用戶：zhuyibin
