计算校验码，格式为：G(X)=x8+X2+X+1,陪集码为FFH，
上传时间： 2015-08-30
上传用户：541657925
linux 简单地说，Linux是一套免费使用和自由传播的类Unix操作系统，它主要用于基于Intel x8 6系列CPU的计算机上。这个系统是由全世界各地的成千上万的程序员设计和实现的。其目的是建立不受任何商品化软件的版权制约的、全世界都能自由使用的Unix兼容产品
标签： linux
上传时间： 2016-02-14
上传用户：sqq
简单地说，Linux是一套免费使用和自由传播的类Unix操作系统，它主要用于基于Intel x8 6系列CPU的计算机上。这个系统是由全世界各地的成千上万的程序员设计和实现的。其目的是建立不受任何商品化软件的版权制约的、全世界都能自由使用的Unix兼容产品
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上传时间： 2014-01-09
上传用户：jjj0202
注意：只有C代码。串行驱动led显示，一个74hc595位移寄存器驱动三极管驱动led位，两个74hc595驱动led段，方式位5位x8段x2=10个数码管5分频，每次扫描时间位1.25ms
上传时间： 2017-04-19
上传用户：yulg
64位:http://wm.makeding.com/iclk/?zoneid=1671&uid=1428 32位：http://wm.makeding.com/iclk/?zoneid=1672&uid=1428 复制网址到浏览器即可下载
上传时间： 2015-08-21
上传用户：dumpsoft
步骤一 按快捷键Ctrl+N新建A4大小空白横向文档，并填充颜色为浅绿色。 步骤二 选择工具箱中的“贝塞尔工具”绘制荷叶，使用“形状工具”进行节点调整。填充轮廓色和填充色。 步骤三 在工具箱中选择“网状填充工具”设置网格中的行列数为3*3，鼠标框选中间4个节点，统一填充颜色为（R：0，G:153，B：51）。 步骤四 选择“贝塞尔工具”绘制荷叶叶脉，由于所画线条是不连接的单一曲线，所以绘制时可以借助键盘上的“空格”键来进行切换。 步骤五 接着利用“贝塞尔工具”依照前面的方法绘制出不同形态的叶子并Ctrl+G群组。 步骤六 用“贝塞尔工具”绘制荷叶茎部，按F12键调整曲线宽度为3，自定义颜色值为（C：70，M:0，Y：100，K：0），然后执行“对象”→“将轮廓转换为对象”命令，再次按F12键添加宽度为细线的（C：78，M:19，Y：76，K：0）的颜色值，调整顺序到后层。 步骤七 选择一片群组合过的叶子，进行位图模糊处理，放在画面后面，达到近实远虚的视觉效果。 步骤八 选择“贝塞尔工具”绘制花瓣，借助网状填充工具填充粉色到洋红色，按Ctrl键绘制一个正圆，按F12把圆加粗，然后执行“对象”→“将轮廓转换为对象”命令（Ctrl+Shift+Q）。 步骤九 绘制各种形态的荷花造型，并群组图形。
上传时间： 2018-08-03
上传用户：cjmktt
常用芯片DIP SOT SOIC QFP电阻电容二极管等3D模型库 3D视图封装库 STEP后缀三维视图（154个）:050-9.STEP0805R.STEP1001-1.STEP1001-2.STEP1001-3.STEP1001-4.STEP1001-5.STEP1001-6.STEP1001-7.STEP1001-8.STEP103_1KV.STEP10X5JT.STEP1206R.STEP13PX2.STEP15PX2.STEP20P插针.STEP25V1000UF.STEP3296W.STEP35V2200UF.STEP3mmLED.STEP3mmLEDH.STEP3X3可调电阻.STEP400V0.1UF.STEP455.STEP630V0.1UF.STEP7805.STEP8P4R.STEPAXIAL-0.2-0.125W.STEPAXIAL-0.4-0.25W.STEPaxial-0.6-2W.STEPB-3528.STEPC-0805.STEPC06x18.STEPCAP-6032.STEPCH3.96 X2.STEPCH3.96-3P.STEPD-PAK.STEPDB25.STEPDC-30.STEPDIP14.STEPDIP16.STEPDIP6.STEPDIP8.STEPDO-214AA.STEPDO-214AB.STEPDO-214AC.STEPDO-41.STEPDO-41Z.STEPFMQ.STEPGNR14D.STEPH9700.STEPILI4981.STEPIN4007.STEPIN5408.STEPJP051-6P6C_02.STEPJQC-3F.STEPJS-1132-10.STEPJS-1132-11.STEPJS-1132-12.STEPJS-1132-13.STEPJS-1132-14.STEPJS-1132-15.STEPJS-1132-2.STEPJS-1132-3.STEPJS-1132-4.STEPJS-1132-5.STEPJS-1132-6.STEPJS-1132-7.STEPJS-1132-8.STEPJS-1132-9.STEPJS-1132R-2.STEPJS-1132R-3.STEPJS-1132R-4.STEPJS-1132R-5.STEPJS-1132R-6.STEPJS-1132R-7.STEPJS-1132R-8.STEPJZC-33F.STEPKBP210.STEPKE2108.STEPKF2510 x8.STEPKF301.STEPKF301x3.STEPKSD-9700.STEPLED5_BLUE.STEPLED5_GRE.STEPLED5_RED.STEPLED5_YEL.STEPLFCSP_WQ.STEPLQFP100.STEPLQFP48.STEPMC-146.STEPmolex-22-27-2021.STEPmolex-22-27-2031.STEPmolex-22-27-2041.STEPmolex-22-27-2051.STEPmolex-22-27-2061.STEPmolex-22-27-2071.STEPmolex-22-27-2081.STEPMSOP10.STEPMSOP8.STEPPA0630NOXOX-HA1.STEPPIN10.STEPPIN24.STEPPIN24A.STEPR 0805.STEPR0402.STEPR0603.STEPR0805.STEPR1206.STEPRA-15.STEPRA-20.STEPRS808.STEPSIP-3-3.96 22-27-2031.STEPSL-B.STEPSL-D.STEPSL-E.STEPSL-G.STEPSL-H.STEPSOD-123.STEPSOD-323.STEPSOD-523.STEPSOD-723.STEPSOD-80.STEPSOIC-8.STEPSOP-4.STEPSOP14.STEPSOP16.STEPSOP18.STEPSOT-89.STEPSOT223.STEPSOT23-3.STEPSOT23-5.STEPSSOP28.STEPTAJ-A.STEPTAJ-B.STEPTAJ-C.STEPTAJ-D.STEPTAJ-E.STEPTAJ-R.STEPTHB6064H.STEPTO-126.STEPTO-126X.STEPTO-220.STEPTO-247.STEPTO-252-3L.STEPTOSHIBA_11-4C1.STEPTSSOP-8.STEPTSSOP14-BOTTON.STEPTSSOP14.STEPTSSOP28.STEPUSB-A.STEPUSB-B.STEPWT.STEP
标签： 芯片 dip sot soic qfp 电阻 电容 二极管 封装
上传时间： 2021-11-21
上传用户：XuVshu
1. Scope ......................................................................................................................................................................... 12. DDR4 SDRAM Package Pinout and Addressing ....................................................................................................... 22.1 DDR4 SDRAM Row for X4,x8 and X16 ................................................................................................................22.2 DDR4 SDRAM Ball Pitch........................................................................................................................................22.3 DDR4 SDRAM Columns for X4,x8 and X16 ..........................................................................................................22.4 DDR4 SDRAM X4/8 Ballout using MO-207......................................................................................................... 22.5 DDR4 SDRAM X16 Ballout using MO-207.............................................................................................................32.6 Pinout Description ..................................................................................................................................................52.7 DDR4 SDRAM Addressing.....................................................................................................................................73. Functional Description ...............................................................................................................................................83.1 Simplified State Diagram ....................................................................................................................................83.2 Basic Functionality..................................................................................................................................................93.3 RESET and Initialization Procedure .....................................................................................................................103.3.1 Power-up Initialization Sequence .............................................................................................................103.3.2 Reset Initialization with Stable Power ......................................................................................................113.4 Register Definition ................................................................................................................................................123.4.1 Programming the mode registers .............................................................................................................123.5 Mode Register ......................................................................................................................................................134. DDR4 SDRAM Command Description and Operation ............................................................................................. 244.1 Command Truth Table ..........................................................................................................................................244.2 CKE Truth Table ...................................................................................................................................................254.3 Burst Length, Type and Order ..............................................................................................................................264.3.1 BL8 Burst order with CRC Enabled .........................................................................................................264.4 DLL-off Mode & DLL on/off Switching procedure ................................................................................................274.4.1 DLL on/off switching procedure ...............................................................................................................274.4.2 DLL “on” to DLL “off” Procedure ..............................................................................................................274.4.3 DLL “off” to DLL “on” Procedure ..............................................................................................................284.5 DLL-off Mode........................................................................................................................................................294.6 Input Clock Frequency Change ............................................................................................................................304.7 Write Leveling.......................................................................................................................................................314.7.1 DRAM setting for write leveling & DRAM termination function in that mode ............................................324.7.2 Procedure Description .............................................................................................................................334.7.3 Write Leveling Mode Exit .........................................................................................................................34
标签： DDR4
上传时间： 2022-01-09
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【资源描述】:在VC709上跑PCIe x8例程，RedHat Linux 。发现官方例程的驱动有些地方不适应于新版Linux了，做了一点修改，同时分享一下心得：首先PCIe例程一定要固化，并且一定要在服务器上电之前给VC709上电，否则用lspci命令是看不到VC709被系统识别的！！！！
上传时间： 2022-06-17
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