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PCB设计问题集锦 问：PCB图中各种字符往往容易叠加在一起，或者相距很近，当板子布得很密时，情况更加严重。当我用Verify Design进行检查时，会产生错误，但这种错误可以忽略。往往这种错误很多，有几百个，将其他更重要的错误淹没了，如何使Verify Design会略掉这种错误，或者在众多的错误中快速找到重要的错误。　 　　答 ...

  The high defi nition multimedia interface (HDMI) is fastbecoming the de facto standard for passing digitalaudio and video data in home entertainment systems.This standard includes an I2C type bus called a displaydata channel (DDC) that is used to pass extended digitalinterface data (EDID) ...

  Accurate measurement of the third order intercept pointfor low distortion IC products such as the LT5514 requirescertain precautions to be observed in the test setup andtesting procedure. The LT5514 linearity performance ishigh enough to push the test equipment and test set-up totheir lim ...

  There are many manufacturers of dot matrix LCD modules. However, most of these displaysare similar. They all have on-board controllers and drivers capable of displaying alpha numericsand a wide variety of other symbols (including Japanese "Katakana" characters). The internaloperation of L ...

介绍了数字视频接口DVI1.0 的体系架构及其基本原理; 从应用角度出发详细介绍了经实验成功的DVI 接口电路系统构成, 以及该系统的核心- DVI 接口器件TFP401A。重点分析了TFP401A的特性、工作原理和高频混合信号电路在PCB 布线中的注意事项, 最后介绍了开发DVI 应用接口相关的EDID(扩展显示标识数据)和HPD(热插拔)检测等VESA ...

superpro 3000u 驱动 PIC16C65B@QFP44 [SA245] PIC16C65B:          Part number QFP44:              Package in QFP44 SA245:          &nbs ...

ERWIN绝好的数据库建模工具,可以把数据模型导入数据库如sql server foxpro等这里是方法指南更多内容可以去http://erwin.softwarechn.com/_script/showfull.asp?Board=method&Tabname=erwin

1.此代码在SDT2.51下调试通过，可以在我的板子ARM DEVELOP BOARD V1.0上面跑！其上电以后LED会闪烁一下，接着串口0会输出一些系统信息 可以通过串口终端与系统交互，可以测试320X240 STN LCD,包括图形显示函数，ascii字符显示函数。

USB通信具有快速，热插拔的特性，可以广泛的应用到与计算机通信的地方。本示例是计算机通过USB总线，控制单片机对I2C E2PROM进行读写操作。下位机电路主要采用广州周立功单片机发展有限公司推出的USB Smart Board，外挂一个24系列的E2PROM。 ...

LPC2148 USB Audio Device Example This USB example project implements an USB Audio Device that connects via the USB interface to the PC. It may be used on the following devices: LPC2141 LPC2142 LPC2144 LPC2146 LPC2148 An USB Audio Device (HID) does not require any special USB driver, since the ...