The Data Encryption Standard (DES) is a published federal encryption standard created to protect unclassified computer data and communications. The DES algorithm is the most widely used encryption algorithm in the world
標簽： Encryption encryption published Standard
上傳時間： 2017-04-18
上傳用戶：lili123
Synopsys' widely-used design constraints format, known as SDC, describes the "design intent" and surrounding constraints for synthesis, clocking, timing, power, test and environmental and operating conditions. SDC has been in use and evolving for more than 20 years, making it the most popular and proven format for describing design constraints. Essentially all synthesized designs use SDC and numerous EDA companies have translators that can read and process SDC.
上傳時間： 2018-07-13
上傳用戶：yalsim
Spread-spectrum communication is a core area within the field of digital communication. Originally used in military networks as countermeasures against the threats of jamming and interception, spread-spectrum systems are now widely used in commercial applications and are part of several wireless and mobile communication standards. Although spread-spectrum communication is a staple topic in textbooks on digital communication, its treatment is usually cursory. This book is designed to provide a more intensive examination of the subject that is suitable for graduate students and practicing engineers with a solid background in the theory of digital communication. As the title indicates, this book stresses principles rather than specific current or planned systems, which are described in manyotherbooks.My goal in this bookis to providea concisebut lucidexplanation of the fundamentals of spread-spectrum systems with an emphasis on theoretical principles.
標簽： Spread-Spectrum Communication Systems 2nd
上傳時間： 2020-06-01
上傳用戶：shancjb
首先下載軟件，解壓軟件，安裝在程序中找到SEGGER,選里面的J-FLASH，進入界面，剛開始的那個界面可以忽略，不用建project也可以；單擊菜單欄的“Options---Project settings”打開設(shè)置，進行jlink配置;正在General選項，選擇“USB”，一般都是默認配置，確認一下即可;然后在CPU選項，選擇芯片型號，先選擇“Device”才能選擇芯片型號，芯片型號，要根據(jù)你使用的芯片進行選擇;在Target interface選項 里面選擇SWD模式;首先Target里面選“Connection”連接目標芯片，然后 Target--Auto進行程序燒寫;首先Target里面選擇“Connection”連接目標芯片，然后 Target--Auto進行程序燒寫.SEGGER J-Links are the most widely used line of debug probes available today. They've proven their value for more than 10 years in embedded development. This popularity stems from the unparalleled performance, extensive feature set, large number of supported CPUs, and compatibility with all popular development environments.
標簽： JLINK
上傳時間： 2022-03-22
上傳用戶：
本文主要介紹如何在Wado設(shè)計套件中進行時序約束，原文出自 xilinx中文社區(qū)。1 Timing Constraints in Vivado-UCF to xdcVivado軟件相比于sE的一大轉(zhuǎn)變就是約束文件，5E軟件支持的是UcF（User Constraints file，而 Vivado軟件轉(zhuǎn)換到了XDc（Xilinx Design Constraints）。XDC主要基于SDc（Synopsys Design Constraints）標準，另外集成了Xinx的一些約束標準可以說這一轉(zhuǎn)變是xinx向業(yè)界標準的靠攏。Altera從 TimeQuest開始就一直使用SDc標準，這一改變，相信對于很多工程師來說是好事，兩個平臺之間的轉(zhuǎn)換會更加容易些。首先看一下業(yè)界標準SDc的原文介紹：Synopsys widely-used design constraints format, known as sDc, describes the design intent"and surrounding constraints for synthesis, clocking, timing, power, test and environmental and operating conditions. sDc has been in use and evolving for more than 20 years, making it the most popular and proven format for describing design constraints. Essentially all synthesized designs use SDc and numerous EDa companies have translators that can read and process sDc
標簽： vivado
上傳時間： 2022-03-26
上傳用戶：
以STC12C5A60S2單片機為控制核心,采用2.4G(JF24D)無線遙控模塊進行無線發(fā)射與接收,設(shè)計了一種雙電機遙控船模控制系統(tǒng).該系統(tǒng)通過切換檔桿實現(xiàn)前進后退,方向盤左右轉(zhuǎn)動、暫停按鈕等控制直流電機的正轉(zhuǎn)、反轉(zhuǎn)、暫停,使得電機驅(qū)動的遙控船模實現(xiàn)前進后退、左右轉(zhuǎn)向、暫停等功能,有效解決了驅(qū)動功率小和船模之間相互干擾等問題,可廣泛應(yīng)用于遙控船模領(lǐng)域.Using STC12C5A60S2 single-chip microcomputer as the controller and 2.4 G(JF24D)wireless remote control module for wireless transmission and reception, a dual-motor remote control ship model control system is designed. The system realizes forward and backward by switching the gear lever. The steering wheel rotates left and right and the pause button controls the forward, reverse and pause of the dc motor. The remote controller of ship model driven by the motor realizes forward and backward, left and right steering, pause and other functions. The ship model control system can effectively solve the problems of small driving power and mutual interference between ship models, and can be widely used in the field of remote controller of ship model.
標簽： 電機 遙控船模 控制系統(tǒng)
上傳時間： 2022-03-27
上傳用戶：
CAN總線是汽車上應(yīng)用最廣泛的車載網(wǎng)絡(luò)總線,具有實時性強、可靠性高、成本低等優(yōu)點。鑒于此,介紹了一種利用飛思卡爾系列單片機MC9S12XS128作為控制器,利用其內(nèi)部的MSCAN模塊、CAN收發(fā)器TJA1040等外圍元件進行CAN總線通信節(jié)點設(shè)計。該設(shè)計能夠?qū)崿F(xiàn)CAN總線數(shù)據(jù)的發(fā)送與接收,可應(yīng)用于汽車及其他各種CAN總線通信系統(tǒng)。CAN bus is the most widely used on-board network bus in automobiles. It has the advantages of realtime, high reliability and low cost. In view of this,this paper introduces the design of CAN bus communication node by using Freescale MC9S12XS128 as controller,using its internal MSCAN module,CAN transceiver TJA1040 and other peripheral components. This design can realize the sending and receiving of CAN bus data,and can be used in automobile and other CAN bus communication systems.
上傳時間： 2022-03-27
上傳用戶：
多功能智能遙控窗簾系統(tǒng)廣泛地應(yīng)用于家居、辦公室等場合,同時也是智能家居的一部分。該設(shè)計主要利用STC89C52單片機核心電路、光敏電阻電路、步進電機電路、溫濕度傳感器、紅外線控制電路、AD轉(zhuǎn)換電路、LCD1602液晶顯示屏等模塊完成精確控制窗簾的開和關(guān)。multi-functional intelligent remote control curtain system is widely used in home,office and other occasions,and is also part of intelligent home.The design mainly uses STC89 C52 single-chip core circuit,photosensitive resistor circuit,stepping motor circuit,temperature and humidity sensor,infrared control circuit,AD conversion circuit,LCD1602 LCD display and other modules to achieve accurate control of the curtain opening and closing.
上傳時間： 2022-03-28
上傳用戶：
隨著電磁閥在工業(yè)和日常應(yīng)用的增多,其功耗越來越被人們所重視。通過對電磁閥驅(qū)動電路的研究,設(shè)計一套電磁閥節(jié)能驅(qū)動電路。不僅提高了電磁閥的響應(yīng)時間,更重要的是降低了功耗,使電磁閥由工作在大電流狀態(tài)下,變成大電流啟動小電流維持的工作狀態(tài)。減少了由電流過大引起的電磁閥線圈過熱,增加了電磁閥的安全性。The power consumption of an electromagnetic valve is drawing increasingly more attentiori as it is widely used in industrial production and daily life. In this study, an energy - saving driving circuit of electromagnetic valves was designed. It can make an electromagnetic valve to start with a high current while work with a low current; thereby the power consumption can be reduced. Besides, it can shorten the response time of an electromagnetic valve and improve the security of the valve.
標簽： 電磁閥 節(jié)能驅(qū)動電路
上傳時間： 2022-04-16
上傳用戶：
本文提出基于AD2S1210的旋變信號轉(zhuǎn)換電路,給出了具體的電路實現(xiàn)方法和配置方法.相比以往的RDC方案,本系統(tǒng)具有精度高,設(shè)計靈活,可靠性高等特點,可廣泛應(yīng)用于各種伺服系統(tǒng)中.In this paper, the switching signal conversion circuit based on ADS1210 is proposed, and the specific circuit implementation and configuration method are given. Compared with the previous RDC scheme, this system has the characteristics of high precision, flexible design and high reliability, and can be widely used in various servo systems.
標簽： ad2s1210
上傳時間： 2022-05-04
上傳用戶：
蟲蟲下載站版權(quán)所有 京ICP備2021023401號-1
