llpk00's Blog

本书是一本有关专用集成电路（ASIC）的综合性和权威性书籍。书中叙述了VLSI系统设计的最新方法。利用商业化工具以及预先设计好的单元库已使得 ASIC设计成为速度最快、成本最低而且错误最少的一种IC设计方法，因而ASIC设计方法已迅速在工业界的各个应用领域得到推广。
　　 本书介绍了半定制和可编程的ASIC。在对每种ASIC类型的数字逻辑设计与物理特性的基本原理进行描述后，讨论了ASIC逻辑设计设计输入、逻辑综合、 仿真以及测试，并进一步讲述了相应的物理设计——划分、布图规划、布局以及布线。此外，本书对在ASIC设计中需要了解的各方面知识以及必需的工作都有详 尽叙述。
　　 本书可作为大学高年级和研究生教材，也是ASIC领域工程技术人员的理想参考书。

我的评论：学ASIC的经典教材了，看这本书才知道FPGA在IC中的地位。全书分为三部分：ASIC介绍、ASIC逻辑设计、ASIC物理设计。我还没看完，等全看完再多说吧，呵呵。

豆瓣链接：专用集成电路

快半年没写博客了，呵呵。一直在忙毕业设计，也许是借口吧，呵呵。这半年发生了很多事情，不管是学习上的，还是私人上的事情^_^。毕业设计还在继续努力中，PCB已经送到工厂了，真怕出错了，呵呵。因为毕设好久没玩 Linux 了，前几天实验室的电脑坏了，就把寝室的电脑搬到了实验室，也因此和 Debian 告别了，用了一年多（？？应该有吧）的Debian就此删了，真有点舍不得。等我下次买笔记本了，再相见吧，Debian。

这半年一直在补以前欠下的知识，但还是感觉落下什么，什么都不会，呵呵。这也许就是对自己掌握知识的不自信吧。还有就是冒着风险没学用Protel画PCB，而是坚持学的Allegro。Allegro的软件操作还是很有意思的，一看就是从UNIX工作站起源的软件，呵呵，处处体现着软件设计的巧妙(还不如说是奇怪的操作，呵呵)。

以后要坚持写博客了，不然工作了，就更没机会写博客了。以后的内容应该会以毕设为主了，Linux先放一边吧。还有三个月，就毕业了，奋斗吧。

4月3号那天，被人莫名其妙的拉去当了一次群众演员，一开始还兴致勃勃的，没多久就意兴阑珊了，呵呵，群众演员也不是那么好当的。一天下来就拍了个镜头，导演的耐心还真让人佩服。还是说说电影吧，拍的是抗日题材的电影《南京！南京！》，导演是陆川，好像刘烨也到现场了，就离我两三米远吧，我把眼镜摘了，懒得戴上，也就没一睹真容了，呵呵。我们饰演的是国民党守城士兵，衣服老破了，不过御寒还是很适合的，呵呵。那天天气还真搞笑，一会刮风，一会下雪，一会下雨的。脸还被涂的比包公还黑，总之惨不忍睹。还是看看照片吧。

相关链接：
1、陆川新片《南京！南京！》
2、刘烨：《南京！南京！》是我拍得最用心的电影

虽然现在FPGA(现场可编程门阵列)这么火，但我相信一定有很多人，不知道FP(现场可编程)的定义吧。我把在维基百科(这几天竟然能上了，真奇怪啊)找到的定义摘录下来，做个备忘，呵呵。

好不容易找到对这些电源标号区别的详细解释，呵呵。现在网上的那些解释不是错误就是不详尽，呵呵。找个时间，把它翻译成中文的，呵呵。

Almost all integrated circuits (ICs) have at least two pins which connect to the power rails of the circuit they are installed in. These are known as the IC's power supply pins. However, the labeling of the pins varies by IC family and manufacturer.

The simplest labels are V and V−. However, internal design and historical tradition have led to a variety of other labels being used. Also, V and V− may be confused with the and − voltage inputs to ICs like op amps.

Sometimes one of the power supply pins will be referred to as ground. In digital logic, this is nearly always the negative pin; in analog integrated circuits, it is most likely to be a pin intermediate in voltage between the most positive and most negative pins ^{[citation needed]}.

Double subscript notation uses similar looking placeholders with subscripts. In that notation the subscripted letters denote two points.

History

V_CC (note: lower case is often used instead of subscript, e.g. "Vcc") is an electronics designation that refers to voltage from a power supply connected to the "collector" terminal of a bipolar transistor. In an NPN bipolar junction transistor, it would be V_CC, while in a PNP transistor, it would be −V_CC. There is debate over the origins of the double letter subscript naming convention. One proposal is that it originated as an abbreviation of the supply voltage for a common collector amplifier with the other power supply names mimicking this fashion. Double letters may also have been used to clearly indicate that a power supply voltage is being referred to.

In general, double letter subscripts refer to power supply voltages. For example, V_EE refers to the "emitter" voltage as supplied by the power supply pin. In NMOS logic, V_SS refers to the "source" voltage, and V_DD is the "drain" voltage likewise.

Within a circuit, single letter subscripts refer to that voltage relative to ground; for example, V_C is the "collector" voltage relative to ground. Two different letters indicate the voltage between two terminals; for example: V_BE is the "base" to "emitter" voltage drop, while V_CE is the "collector" to "emitter" voltage.

Modern use

CMOS ICs have generally borrowed the NMOS convention of V_DD for positive and V_SS for negative despite the fact that both positive and negative supply rails actually go to source terminals (positive supply goes to PMOS sources, negative supply to NMOS sources). ICs using bipolar transistors have V_CC (positive) and V_EE (negative) power supply pins.

In single supply systems (e.g., most modern digital and analog circuits) the negative power supply pin is also commonly referred to as GND. In "split rail" supply systems (e.g., older analog circuits) positive, negative and ground power supply pins are used.

More advanced chips will often have pins carrying voltage levels for more specialized functions in or out of the chip and these are generally labeled with some abbreviation of their purpose. For example V_BUS for the 5 volt supply needed for a bus-powered USB device or V_ref for the reference voltage for an analog-to-digital converter.

这几天在学习 emacs 中最头疼的就是一大堆的命令，为方便以后查询，将学习中遇到的每个命令都记录在了 Google Spreadsheet。现在把它放在博客上，希望对大家也有帮助：），现在命令还不多，随着学习的深入，命令会逐渐增多，该表格会由 Google Spreadsheet 自动更新。

命令查询

试了一下永中 Office，我就把 OpenOffice 卸掉了。用 OpenOffice 打开中文 Word 文档总是"变形"，永中 Office 就没这问题，我需要的只是能够正常浏览 doc 和 ppt 而已。永中 Office 用 Java 开发，正式版是要收费的，但提供试用版免费下载使用，虽然是试用版，但完全不影响使用。如果不介意永中不是自由软件的话，这个软件很值得一试哦。反正我是不想使用那臃肿的 OpenOffice。还有永中 Office 自带了一套中文字体，效果还不错。看张截图吧，界面很像 Microsoft 的 Office 哦。

下载: 永中集成Office2007简体中文试用版