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.
上传时间： 2018-07-13
上传用户：yalsim
用SI7021、STC15W204及0.96寸IIC的OLED制作个温湿度计。 这个温湿度计是用于最后版办公室多功能桌面工具组合操作显示界面用的http://bbs.mydigit.cn/read.php?tid=2210356，由于SI7021是IIC总线的，如直接由工具组合显示主控控制SI7021，占用资源多，所以把它独立出来，用片STC15W204读SI7021，然后采用模拟红外遥控编码格式把数据输出。原打算是用DHT11，但DHT11的湿度误差太大了，所以改用SI7021。 以下是制作图片。 电路图比较简单，所以不传电路图了。注意:VCC是3。3Ⅴ的。
标签： 温湿度计
上传时间： 2018-10-22
上传用户：13536121668
FLAHS WRITE AND read
标签： C8051 8051F FLASH 8051 F020 020
上传时间： 2018-11-20
上传用户：shc0287
I saw the light of the future when I first read Ray Kurzweil’s best-seller book The Singularity Is Near: When Humans Transcend Biology. One cubic inch of nanotube cir- cuitry, once fully developed, would be up to one hundred million times more powerful than the human brain.
标签： Predictive Cognitive Warning System Early The
上传时间： 2020-05-26
上传用户：shancjb
Your Cisco Networking Academy Course Booklet is designed as a study resource you can easily read, high- light, and review on the go, wherever the Internet is not available or practical: ■ The text is extracted directly, word-for-word, from the online course so you can highlight important points and take notes in the “Your Chapter Notes” section. ■ Headings with the exact page correlations provide a quick reference to the online course for your class- room discussions and exam preparation. ■ An icon system directs you to the online curriculum to take full advantage of the images, labs, Packet Tracer activities, and dynamic Flash-based activities embedded within the Networking Academy online course interface.
标签： Switching Wireless LAN and
上传时间： 2020-05-27
上传用户：shancjb
LIKE SO MANY OTHERS , THIS BOOK WAS WRITTEN BECAUSE WE COULDN ’ T FIND ONE LIKE IT . We needed something to hand to all of those people who have come to us asking for “a good book to read on RFID.” When we looked for candidates we found some great books, but most were aimed at electrical engineers or top-level managers, with very little for those of us who are in between. This book is for developers, system and software architects, and project managers, as well as students and professionals in all of the industries impacted by Radio Frequency Identification (RFID) who want to understand how this technology works. As the title suggests, this book is about RFID in general and not just the most recent developments; however, because so much is going on in the area of RFID for the supply chain and especially the Electronic Product Code (EPC), we have devoted consider- able space to these topics. Regardless of the type of RFID work you may be doing, we think you will find something useful here.
标签： Essentials RFID
上传时间： 2020-06-08
上传用户：shancjb
软件开发人员必备工具书，，目录如下Welcome to Software Construction [1]1.1 What Is Software Construction?1.2 Why Is Software Construction Important?1.3 How to read This Book......7.1 Valid Reasons to Create a Routine7.2 Design at the Routine Level7.3 Good Routine Names7.4 How Long Can a Routine Be?7.5 How to Use Routine Parameters7.6 Special Considerations in the Use of Functions7.7 Macro Routines and Inline RoutinesDefensive Programming [5.6 + new material]8.1 Protecting Your Program From Invalid Inputs8.2 Assertions8.3 Error Handling Techniques8.4 Exceptions8.5 Barricade Your Program to Contain the Damage Caused by Errors8.6 Debugging Aids8.7 Determining How Much Defensive Programming to Leave in Production Code8.8 Being Defensive About Defensive ProgrammingThe Pseudocode Programming Process [4+new material]9.1 Summary of Steps in Building Classes and Routines9.2 Pseudocode for Pros9.3 Constructing Routines Using the PPP9.4 Alternatives to the PPP......
上传时间： 2021-12-08
上传用户：20125101110
Proprietary Code read Out Protection (PCROP) ----- 专有代码读取保护 现在产品开发过程中，二次开发将会越来越多，设计公司开发出自己产品后交给终端客户进行二次功能或补充开发，简称二次开发，设计公司某些程序代码不希望公开给终端客户，但同时又希望部分函 数功能可以给终端客户使用，这时就需要有一种专有代码保护机制供客户使用，STM32F4xx 芯片中的 PCROP 可以解决类似问题。
标签： stm32
上传时间： 2022-02-21
上传用户：
本文主要介绍如何在Wado设计套件中进行时序约束，原文出自 xilinx中文社区。1 Timing Constraints in Vivado-UCF to xdcVivado软件相比于sE的一大转变就是约束文件，5E软件支持的是UcF（User Constraints file，而 Vivado软件转换到了XDc（Xilinx Design Constraints）。XDC主要基于SDc（Synopsys Design Constraints）标准，另外集成了Xinx的一些约束标准可以说这一转变是xinx向业界标准的靠拢。Altera从 TimeQuest开始就一直使用SDc标准，这一改变，相信对于很多工程师来说是好事，两个平台之间的转换会更加容易些。首先看一下业界标准SDc的原文介绍：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
标签： vivado
上传时间： 2022-03-26
上传用户：
为了确保最佳性能，请仔细阅读本手册。请将其保存在安全的地方，以备将来参考。将本机安装在阴凉，干燥，清洁的地方-远离窗户的热源，过多的振动灰尘，湿气和冷源。避免嗡嗡声的变压器，电动机。为避免起火或电击，请勿使本机遭受雨淋或浸水。绝对不要机柜。如果有东西掉入设备中，请与经销商联系。不要在开关，控件或连接线上用力。移动设备时，请先拔下电源插头和与其他设备相连的电线。切勿自己拉电线。机柜上的开口可确保设备正常通风。如果这些开口被阻塞，则机柜内部的温度将迅速升高。因此，请避免将物品放在这些开口处，并将其安装在后方10厘米，两侧20厘米，深30厘米9通风条件确保设备的顶部面板至少留出一定空间。否则不仅会损坏设备，还会引起火灾。To assure the finest performance, please read this manual carefully. Keep it in a safe place for future reference Install this unit in a cool, dry, clean place -away from windows heat sources, sources of excessive vibration dust, moisture and cold. Avoid sources of humming transformers, motors). To prevent fire or electrical shock do not expose the unit to rain or water.
上传时间： 2022-04-02
上传用户：
